CN211901231U

CN211901231U - Nut with inner clamp

Info

Publication number: CN211901231U
Application number: CN202020291062.3U
Authority: CN
Inventors: 林大森
Original assignee: Ruian Weifu Standard Parts Co ltd
Current assignee: Ruian Weifu Standard Parts Co ltd
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2020-11-10
Anticipated expiration: 2030-03-11

Abstract

The utility model discloses an in-band card nut, including outer hexagon, the screw hole is established at outer hexagon's center, its characterized in that: the hole wall of the threaded hole is provided with an annular groove, an elastic snap ring is arranged in the annular groove, the upper side groove surface of the annular groove is in horizontal plane contact with the upper end surface of the elastic snap ring, and a conical horn mouth is arranged on one side of the inner hole of the elastic snap ring, which is close to the lower end surface of the elastic snap ring; when the elastic snap ring is not elastically expanded, the hole diameter of the inner hole of the elastic snap ring is not larger than the small diameter of the thread of the threaded hole, and when the elastic snap ring is completely elastically expanded, the hole diameter of the inner hole of the elastic snap ring is not smaller than the large diameter of the thread of the threaded hole. The utility model is used for locking of stopping in the nut during threaded connection can prevent that the pine of nut from taking off and droing, avoids the production of potential safety hazard.

Description

Nut with inner clamp

Technical Field

The utility model relates to a fastener product, concretely relates to hexagon nut.

Background

When being used for threaded connection with the bolt cooperation, the hexagon nut can become flexible after vibration occasions or long-time use, and the bolt is likely to be detached after loosening, thereby falling into the inside of equipment and leading to the production of potential safety hazard. Although some measures are taken to solve the above technical problems, the technical solutions are generally not ideal and require additional parts.

Disclosure of Invention

Not enough to prior art exists, the utility model aims at providing a locking of stopping in nut when being used for threaded connection can prevent that the pine of nut from taking off and droing, avoids the in-band card nut that the potential safety hazard produced.

The utility model discloses a through following technical scheme implementation:

in-band card nut, including outer hexagon, the screw hole is established at the center of outer hexagon, its characterized in that: the hole wall of the threaded hole is provided with an annular groove, an elastic snap ring is arranged in the annular groove, the upper side groove surface of the annular groove is in horizontal plane contact with the upper end surface of the elastic snap ring, and a conical horn mouth is arranged on one side of the inner hole of the elastic snap ring, which is close to the lower end surface of the elastic snap ring; when the elastic snap ring is not elastically expanded, the hole diameter of the inner hole of the elastic snap ring is not larger than the small diameter of the thread of the threaded hole, and when the elastic snap ring is completely elastically expanded, the hole diameter of the inner hole of the elastic snap ring is not smaller than the large diameter of the thread of the threaded hole.

The fastening connection process of the nut with the inner clamp and the bolt in the technical scheme is as follows: the screw rod excircle of bolt is twisted to the nut, after the screw rod head of bolt reachd the lower terminal surface of snap ring, the chamfer of screw rod head can bulldoze the toper horn mouth and make snap ring's hole opened by elasticity, at this moment the screw rod can pass from snap ring's centre, because the screw rod excircle of bolt has seted up corresponding draw-in groove in advance in the position that corresponds snap ring, so when the nut is screwed up and is targetting in place, snap ring can elastic recovery and enter into in the draw-in groove, make the nut, the bolt has the stopping structure in threaded connection's inboard, and then can realize the nut, the threaded connection's of bolt stopping locking function, even after many vibration occasions or long-time use, the nut can not be followed the bolt and not hard up and drop, avoid the production of potential safety hazard. At this time, the nut is withdrawn from the bolt unless a large reverse screwing force is applied to the nut to twist and deform the elastic snap ring.

Preferably, the annular groove is close to the upper end face side of the outer hexagon.

Drawings

The utility model discloses there is following figure:

FIG. 1 is a schematic structural view of the nut with an inner clip of the present invention,

figure 2 is a top view in elevation of figure 1,

fig. 3 is a structure view of a screw connection structure of an inner snap nut and a bolt.

Detailed Description

The details and the working principle of the embodiments of the present invention are described in detail below with reference to the accompanying drawings:

as shown in fig. 1 and 2, the nut with the inner clamping ring of the present invention includes an outer hexagon 1, a threaded hole 2 is provided at the center of the outer hexagon 1, a circular groove 4 is provided on the hole wall of the threaded hole 2, the circular groove 4 is close to one side of the upper end face of the outer hexagon 1, an elastic snap ring 3 is installed in the circular groove 4, the elastic snap ring 3 is a metal ring or a plastic ring with a cut-off portion in the circumferential direction, the upper side groove face of the circular groove 4 is in horizontal plane contact with the upper end face of the elastic snap ring 3, and a conical flare 31 is provided at one side of the inner hole of the elastic snap ring 3 close to; when the elastic clamping ring is not elastically expanded, the hole diameter of the inner hole of the elastic clamping ring 3 is not larger than the small diameter of the thread of the threaded hole 2, and when the elastic clamping ring is completely elastically expanded, the hole diameter of the inner hole of the elastic clamping ring 3 is not smaller than the large diameter of the thread of the threaded hole 2.

As shown in fig. 3, work as the utility model discloses an in-band clamp nut and the mutual threaded connection back of bolt that corresponds, in the draw-in groove that elasticity snap ring can elastic recovery and enter into the screw rod excircle of bolt and be equipped with, then nut, bolt have the stopping structure in threaded connection's inboard, and then realized the stopping locking function of the threaded connection of nut, bolt.

Claims

1. In-band card nut, including outer hexagon, the screw hole is established at the center of outer hexagon, its characterized in that: the hole wall of the threaded hole is provided with an annular groove, an elastic snap ring is arranged in the annular groove, the upper side groove surface of the annular groove is in horizontal plane contact with the upper end surface of the elastic snap ring, and a conical horn mouth is arranged on one side of the inner hole of the elastic snap ring, which is close to the lower end surface of the elastic snap ring; when the elastic snap ring is not elastically expanded, the hole diameter of the inner hole of the elastic snap ring is not larger than the small diameter of the thread of the threaded hole, and when the elastic snap ring is completely elastically expanded, the hole diameter of the inner hole of the elastic snap ring is not smaller than the large diameter of the thread of the threaded hole.

2. The nut with an inner clip of claim 1, wherein: the annular groove is close to one side of the upper end face of the outer hexagon.