阅读说明：本技术 防松螺母 (Anti-loose nut ) 是由 姜鹏 赵建文 高立东 乔福泉 薛云 高慧 戴丽平 李虎 国鑫 万国超 于 2021-07-05 设计创作，主要内容包括：本发明提供一种防松螺母,包括：螺母本体、限位销轴和圆球体；螺母本体形成有螺纹孔,并形成有正交设置的轴向通孔和径向通孔,轴向通孔用于安装限位销轴,径向通孔与螺纹孔连通,用于安装圆球体；径向通孔的直径大于圆球体的直径,圆球体的直径大于限位销轴的最大直径,并大于径向通孔的内侧到螺纹孔中的螺纹沟底的距离；轴向通孔的直径与限位销轴的最大直径相同；在将限位销轴压入到轴向通孔中的第一位置时,实现螺杆和螺母本体之间的缩紧；在将限位销轴压入到轴向通孔的第二位置时,解除对螺杆的挤压。本发明不但能够锁定螺母,避免螺母松动,还可根据需要方便拆除。(The invention provides a locknut, comprising: the nut comprises a nut body, a limiting pin shaft and a spherical body; the nut body is provided with a threaded hole, an axial through hole and a radial through hole which are orthogonally arranged are formed, the axial through hole is used for installing a limiting pin shaft, and the radial through hole is communicated with the threaded hole and used for installing the sphere; the diameter of the radial through hole is larger than that of the sphere, and the diameter of the sphere is larger than the maximum diameter of the limiting pin shaft and is larger than the distance from the inner side of the radial through hole to the bottom of the thread groove in the threaded hole; the diameter of the axial through hole is the same as the maximum diameter of the limiting pin shaft; when the limiting pin shaft is pressed into the first position in the axial through hole, the screw rod and the nut body are tightened; when the limiting pin shaft is pressed into the second position of the axial through hole, the extrusion on the screw rod is released. The nut locking device not only can lock the nut and avoid the nut from loosening, but also can be conveniently detached as required.)

1. A locknut, comprising: the nut comprises a nut body, a limiting pin shaft and a spherical body; the nut body is provided with a threaded hole, an axial through hole and a radial through hole which are orthogonally arranged are formed in the side wall of the nut body, the axial through hole is used for mounting the limiting pin shaft, and the radial through hole is communicated with the threaded hole and used for mounting the sphere; the diameter of the radial through hole is larger than that of the spherical body, and the diameter of the spherical body is larger than the maximum diameter of the limiting pin shaft and is larger than the distance from the inner side of the radial through hole to the bottom of the thread groove in the threaded hole; the diameter of the axial through hole is the same as the maximum diameter of the limiting pin shaft;

when the nut body is connected to the screw rod and the limiting pin shaft is pressed into the first position in the axial through hole, the limiting pin shaft extrudes the sphere to extrude the screw rod, and the screw rod and the nut body are tightened; when the limiting pin shaft is pressed into the second position of the axial through hole, the limiting pin shaft is separated from the spherical body, extrusion on the screw rod is relieved, and the distance between the first position and the bottom end of the nut body is larger than the distance between the second position and the bottom end of the nut body.

2. The locknut of claim 1, wherein the first position is a distance from the bottom end of the nut body that is less than a distance from a central axis of the radial through hole to the bottom end of the nut body; the second position is located at the bottom end of the nut body.

3. The locknut of claim 1, wherein the limiting pin comprises an upper cylinder, a concave cylinder, a lower cylinder and a conical cylinder which are connected in sequence, wherein the diameters of the upper cylinder and the lower cylinder are the same, the concave cylinder is obtained by rotating an inwardly-distorted circular arc for 360 degrees around a central axis of the limiting pin, the circular arc is respectively connected with the lower end of the upper cylinder and the upper end of the lower cylinder, and the diameter of the conical cylinder is gradually reduced from top to bottom.

4. The locknut of claim 3, wherein the length of the limiting pin shaft is smaller than the height of the nut body, the distance from the top end of the upper cylinder to the middle of the recessed column is smaller than the distance from the top end of the nut body to the central axis of the radial through hole, and the distance from the bottom end of the tapered column to the middle of the recessed column is equal to the distance from the bottom end of the nut body to the central axis of the radial through hole.

5. The locknut of claim 1 wherein the radial through-hole is provided at a central position of the sidewall.

Technical Field

The invention relates to a locknut, which belongs to the field of universal standard components and is mainly used for mechanical connection of equipment in vibration places.

Background

Nuts are common components used in mechanical connections. However, under vibration conditions, ordinary nuts often loosen themselves, resulting in connection failure. In order to solve the problem of loosening of the threaded connecting piece, various methods are adopted, such as pin penetration, additional rotation stopping lock pieces and the like. These solutions can solve the anti-loosening problem, but are not very convenient in terms of removal and reuse.

Disclosure of Invention

Aiming at the defects of the existing anti-dismantling nut in the aspects of dismantling and reusing, the embodiment of the invention provides the locknut.

The technical scheme adopted by the invention is as follows:

the embodiment of the invention provides a locknut, comprising: the nut comprises a nut body, a limiting pin shaft and a spherical body; the nut body is provided with a threaded hole, an axial through hole and a radial through hole which are orthogonally arranged are formed in the side wall of the nut body, the axial through hole is used for mounting the limiting pin shaft, and the radial through hole is communicated with the threaded hole and used for mounting the sphere; the diameter of the radial through hole is larger than that of the spherical body, and the diameter of the spherical body is larger than the maximum diameter of the limiting pin shaft and is larger than the distance from the inner side of the radial through hole to the bottom of the thread groove in the threaded hole; the diameter of the axial through hole is the same as the maximum diameter of the limiting pin shaft; when the nut body is connected to the screw rod and the limiting pin shaft is pressed into the first position in the axial through hole, the limiting pin shaft extrudes the sphere to extrude the screw rod, and the screw rod and the nut body are tightened; when the limiting pin shaft is pressed into the second position of the axial through hole, the limiting pin shaft is separated from the spherical body, extrusion on the screw rod is relieved, and the distance between the first position and the bottom end of the nut body is larger than the distance between the second position and the bottom end of the nut body.

The locknut provided by the embodiment of the invention not only can lock the nut and avoid the nut from loosening, but also can be conveniently detached as required.

Drawings

Fig. 1 is a schematic structural view of a locknut provided in an embodiment of the present invention;

fig. 2 to 4 are schematic application diagrams of a locknut according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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 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.

When the anti-loose nut provided by the embodiment of the invention is screwed on the screw 2 with the screw seat 1, the nut can be locked, the nut is prevented from loosening, and the anti-loose nut can be conveniently detached as required.

Specifically, as shown in fig. 1, an embodiment of the present invention provides a locknut, including: the nut comprises a nut body 3, a limiting pin shaft 4 and a sphere 5.

In the embodiment of the present invention, the nut body 3 may be a general nut structure, and a threaded hole is formed in the middle of the nut body for screwing with the screw rod 2. The nut body 3 of the embodiment of the present invention is different from the conventional nut structure in that the nut body 3 is formed with a cylindrical radial through hole 31 and an axial through hole 32 which are orthogonally arranged on a side wall. As shown in fig. 2 to 4, the axial through hole 32 is used for installing the limit pin 4, and the radial through hole 31 is communicated with the threaded hole for installing the sphere 5. The radial through hole 31 may be formed at a middle position of the sidewall, and the diameter of the radial through hole 31 is larger than that of the spherical body 5, so that the spherical body 5 can be inserted into the radial through hole 31. The diameter of the sphere 5 is larger than the maximum diameter of the limit pin 4 to prevent the sphere 5 from falling into the axial through hole 32. The diameter of the sphere 5 is larger than the distance from the inner side of the radial through hole 31 to the bottom of the thread groove in the threaded hole, so that extrusion force can be generated on the screw rod 2 under the extrusion of the limiting pin shaft. The diameter of the axial through hole is the same as the maximum diameter of the limit pin shaft so as to be limited in the axial through hole 32 when the limit pin shaft 4 is pressed into the axial through hole.

When the nut body 3 is connected to the screw rod 2 and the limit pin is pressed into the first position L1 in the axial through hole 32, as shown in fig. 3, the limit pin 4 extrudes the sphere 5 to extrude the screw rod 2, so as to realize the shrinkage between the screw rod 2 and the nut body 3; when the stopper pin 4 is pressed into the second position L2 of the axial through hole 32, as shown in fig. 4, the stopper pin 4 is separated from the spherical body 5, the screw 2 is released from being pressed, and the nut body 3 is released from being tightened. The distance between the first position and the bottom end of the nut body is greater than the distance between the second position and the bottom end of the nut body, namely, when the limit pin shaft is located at the first position L1, the nut body 3 and the screw rod 2 are in a locking state, when the limit pin shaft is located at the second position L2, the nut body 3 and the screw rod 2 are in a non-locking state, and at the moment, the nut body 3 can be detached as required. The distance between the first position and the bottom end (namely the bottom end face) of the nut body is smaller than the distance between the central axis of the radial through hole and the bottom end of the nut body; the second position is located the bottom of nut body.

Specifically, as shown in fig. 1 to 4, in the embodiment of the present invention, the limit pin 4 may include an upper cylinder 41, a recessed column 42, a lower cylinder 43, and a tapered column 44, which are connected in sequence, wherein the diameters of the upper cylinder 41 and the lower cylinder 43 are the same, the recessed column 42 is obtained by rotating an inwardly warped circular arc line around a central axis of the limit pin by 360 degrees, the circular arc line is connected to a lower end of the upper cylinder 41 and an upper end of the lower cylinder 43, respectively, that is, the recessed column 42 is an arc-shaped groove. The tapered post 44 has a diameter that decreases from top to bottom.

Further, the length of the limit pin 4 is smaller than the height of the nut body 3, so as to be completely accommodated in the axial through hole 32 in the first position and the second position. The distance from the top end of the upper cylinder 41 to the middle of the recessed post 42 is less than the distance from the top end of the nut body 3 to the central axis of the radial through hole 31, so that in the first position, as shown in fig. 3, the spherical body 5 just abuts against the lower cylinder 43. The distance from the bottom end of the tapered post 44 to the middle of the recessed post is equal to the distance from the bottom end of the nut body to the central axis of the radial through hole, so that in the second position, as shown in fig. 4, the spherical body 5 can contact the recessed post 42 with a small middle diameter, thereby relieving the compression of the screw 2. As shown in fig. 2, when the bottom end of the limit pin 4, i.e. the tapered column 44, is just in contact with the sphere 5, an included angle between the tapered column 44 and the sphere 5, i.e. an included angle a between a lateral line of the tapered column 44 and a tangent line of the sphere 5 passing through a contact point, is smaller than a self-locking angle B of the nut body 3 and the screw 2 in a locked state, as shown in fig. 4.

With continued reference to fig. 2 to 4, an application of the locknut provided by the embodiment of the present invention will be described. Fig. 2 is a schematic view of the locknut and the nut in an unlocked state. Fig. 3 is a schematic view of the locknut and the nut in a locked state. Fig. 4 is a schematic view of the locknut and the nut in an unlocked state.

As shown in fig. 2, in application, the nut body 3 is screwed onto the screw rod 2, then the tapered column 44 of the limit pin 4 is pressed into the axial through hole 32, the cambered surface of the tapered column 44 presses the spherical body 5 to move towards the inner side of the nut body 3, and the spherical body 5 contacts and presses the thread of the screw rod 2.

Next, as shown in fig. 3, after the limit pin 4 is completely pressed into the axial through hole 32, the tapered column 4441 of the limit pin 4 passes over the sphere 5, and the lower column 43 of the limit pin 4 contacts with the sphere 5, at this time, since the diameter of the sphere 5 is greater than the distance from the central axis of the lower column 43 to the thread groove bottom of the nut body, i.e., the thread groove bottom of the screw 2, the sphere 5 cannot move, so that the position of the sphere 5 is determined. Under the state, the sphere 5 is extruded between the thread of the screw rod 2 and the limit pin shaft 4, the thread of the screw rod 2 is slightly extruded and deformed and locked under the pressure of the sphere 5, and therefore the displacement trend between the screw rod 2 and the nut body 3 is prevented, and further the nut body 3 is prevented from loosening.

As shown in fig. 4, when the nut body 3 needs to be removed, the limit pin 4 is continuously pressed into the axial through hole 3232, when the tapered column 44 reaches the bottom and contacts the screw seat 1, the recessed column 42 of the limit pin 4 is aligned with the spherical body 5, the spherical body 5 retreats into the groove of the recessed column 42, the thread of the screw rod 2 is extruded and disappears, and at this time, the nut body 3 can be removed.

Therefore, the anti-loose nut provided by the embodiment of the invention can realize anti-loose and dismounting functions only by arranging two orthogonal radial through holes and axial through holes on the nut body and then respectively using the spherical body and the limiting pin shaft, and has the advantages of simple structure, easiness in processing and convenience in use, and can well realize anti-loose and convenient dismounting of the nut.

The above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.