CN201636181U

CN201636181U - Autolocking rivet nut for preventing rotation

Info

Publication number: CN201636181U
Application number: CN200920317295XU
Authority: CN
Inventors: 潘新容; 王鹏; 冉杰; 戴爱丽
Original assignee: Guizhou Aerospace Precision Products Co Ltd
Current assignee: Guizhou Aerospace Precision Products Co Ltd
Priority date: 2009-12-14
Filing date: 2009-12-14
Publication date: 2010-11-17
Anticipated expiration: 2019-12-14

Abstract

The utility model discloses an autolocking rivet nut for preventing rotation. The nut is in a round tube shape, an inner hole of a round tube comprises an unthreaded hole section (1) and a screw thread section (2), wherein the end part of the unthreaded hole section (1) is provided with a countersunk head (3), and the shape of the countersunk head (3) is a noncircular reversed frustum; and the end part of the screw thread section (2) is provided with a closing opening (4). In the utility model, the countersunk head of the rivet nut is made into noncircular, when the countersunk head of the rivet nut is sunk into a riveted plank, the rotation of the rivet nut can be prevented after the rivet nut loosens because the noncircular shape has the characteristic of limiting rotation. Furthermore, because the closing opening is arranged at the end part of the screw thread section, the autolocking rivet nut has excellent autolocking performance, can prevent bolts or nuts connected therewith from loosening and has the functions of longitudinal locating, bearing longitudinal pressure and excellent anti-vibration, also has low processing difficulty and convenient assembly, can reduce the number and the weight of used fasteners, and is particularly suitable for occasions with larger vibration.

Description

A kind of self-locking Insert Nut of rotation inhibiting

Technical field

The utility model relates to a kind of fastening piece, particularly relates to a kind of self-locking Insert Nut of rotation inhibiting.

Background technique

Insert Nut claims the staking nut again, is used for the fastening field of process industries such as all kinds of sheet metals, tubing, uses at present the fit at electromechanics such as automobile, aviation, railway, refrigeration, elevator, switch, instrument, furniture, decoration and light industrial goods widely.For solve sheetmetal, the light wall pipe welded nut is meltable, attacks easily shortcoming such as sliding tooth and developing of internal thread, does not need welded nut, riveted joint firm efficient height, easy to use.

All kinds of countersunk head Insert Nuts commonly used at present do not have rotation inhibiting and auto-lock function, are used in general occasion and can satisfy usage requirement substantially.But be used in the bigger occasion of some vibrations,, Insert Nut can be rotated together along with the screw of its connection because vibration can cause riveted joint loosening.Chang Yong Insert Nut is worked under vibration condition for a long time owing to there is not auto-lock function in addition, also might make connected screw loosening.The above-mentioned Insert Nut that either way might make loses due fastening effect.

The model utility content

The purpose of this utility model is to provide a kind of self-locking Insert Nut of rotation inhibiting, and is loosening and loosening with its attachment screw to prevent the Insert Nut riveted joint, with the reliability that guarantees to connect.

The technical solution of the utility model: a kind of self-locking Insert Nut of rotation inhibiting, this nut are tubular shape, and the endoporus of pipe comprises unthreaded hole section and thread section, and the end of unthreaded hole section is provided with countersunk head, countersunk head be shaped as non-circular inversed taper platform; The end of thread section is provided with closing in.

In the self-locking Insert Nut of above-mentioned rotation inhibiting, the aperture of described unthreaded hole section is greater than the aperture of thread section.

In the self-locking Insert Nut of aforementioned rotation inhibiting, the end of described thread section is provided with 2～4 closing ins.

In the self-locking Insert Nut of aforementioned rotation inhibiting, the end of described thread section is provided with 3 closing ins.

In the self-locking Insert Nut of aforementioned rotation inhibiting, the end face of described non-circular inversed taper platform is the stretching circle that is made of two decentraction and the semicircle that is oppositely arranged, and the bottom surface of non-circular inversed taper platform is the circle identical with the pipe external diameter.

In the self-locking Insert Nut of aforementioned rotation inhibiting, the frustum angle α of described stretching arc surface is 70～80 °; The frustum angle β of stretching circle stretching face is 55～65 °.

In the self-locking Insert Nut of aforementioned rotation inhibiting, the frustum angle α of described stretching arc surface is 76 °; The frustum angle β of stretching circle stretching face is 60 °.

Compared with prior art, the utility model is made the countersunk head of Insert Nut non-circular, after the countersunk head of Insert Nut is absorbed in the sheet material of being riveted, because non-circular characteristic with restriction rotation can prevent that Insert Nut from rotating after loosening.The utility model also is provided with closing in the end of thread section in addition, has good self-locking property, can prevent with its attachment screw, bolt or double-screw bolt loosening, and have longitudinal register, bear longitudinal pressure and good antihunt action, it is low, easy to assembly that the utility model also has a difficulty of processing, can reduce the quantity and weight of used fastening piece.

Description of drawings

Fig. 1 is a perspective view of the present utility model;

Fig. 2 is a plane structure schematic representation of the present utility model;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the plan view of Fig. 2;

Fig. 5 is the schematic representation that the utility model is riveted two-layer thin plate;

Fig. 6 utilizes screw or bolt to connect the schematic representation of thin plate on Insert Nut of the present utility model;

Fig. 7 is the schematic representation that utilizes screw or bolt union piece on the utility model.

Being labeled as in the accompanying drawing: 1-unthreaded hole section, the 2-thread section, the 3-countersunk head, 4-closes up, 5-end face, 6-cambered surface, 7-stretching face, 8-riveted joint expansion boss, 9-thin plate, 10-screw or bolt, 11-double-screw bolt, 12-connected piece.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment.A kind of self-locking Insert Nut of rotation inhibiting, its three-dimensional structure diagram as shown in Figure 1, plane structure chart as shown in Figure 2, Fig. 3 is the left view of Fig. 2, Fig. 4 is the plan view of Fig. 2.See that Fig. 1 to Fig. 4 Insert Nut of the present utility model as can be known is a tubular shape, the endoporus of pipe comprises unthreaded hole section 1 and thread section 2, and the aperture of unthreaded hole section 1 is greater than the aperture of thread section 2, like this can be easily screw or bolt be screwed into the thread section 2 of Insert Nut.The end of unthreaded hole section 1 is provided with countersunk head 3, and during riveted joint, countersunk head 3 can be absorbed in the thin plate that needs riveted joint.Countersunk head 3 be shaped as non-circular inversed taper platform; So-called inversed taper platform is meant the base area of end face 5 areas of frustum greater than frustum.The end face 5 of non-circular inversed taper platform is the stretching circle that is made of two decentraction and the semicircle that is oppositely arranged in this example, round the somewhat similar ellipse of shape stretches, but neither be oval, every bit is camber line on the ellipse, and the circle that stretches is the shape that two decentraction and the semicircle centre that is oppositely arranged connect into straight line, semi-circular portions is called cambered surface 6, and straight section is called stretching face 7.The frustum angle α of stretching arc surface 6 is 70～80 °, and its angle [alpha] is relevant with the centre distance (tensile elongation) of two semicircles, the frustum angle α of stretching arc surface 6 be 76 ° best; The frustum angle β of stretching circle stretching face 7 is 55～65 °, and this angle β is with irrelevant with the centre distance (tensile elongation) of two semicircles.The bottom surface of non-circular inversed taper platform is the circle identical with the pipe external diameter.The end of thread section 2 is provided with at 2～4 and closes up 4, preferably is provided with at 3 and closes up 4.So-called closing in 4 is meant that the closing in section cylindrical with the thread section 2 of Insert Nut flattens the formation depression, screw thread in the Insert Nut is deformed, internal thread locking when screw, bolt or double-screw bolt are screwed into, thus play the effect of becoming flexible of preventing, the auto-lock function that just it has often been said.Because so the locking effect that closing in place forms is the effect that the utility model also has longitudinal register, bears longitudinal pressure.

Application of the present utility model can be riveted together two thin plates as shown in Figure 5.During use, the self-locking Insert Nut of rotation inhibiting is put into the hole of thin plate 9 according to the countersunk head shape, by the spy with reaming tool (hand riveter) with the self-locking Insert Nut riveting of rotation inhibiting in the riveted joint part, on Insert Nut, form riveted joint expansion boss 8, stretching circle and riveted joint expansion boss 8 by supporting surface compress two-layer thin plate 9, can play good fastening function.

Application of the present utility model also can be as shown in Figure 6, after thin plate 9 is gone in the self-locking Insert Nut riveting of rotation inhibiting, be connected with connected piece 12 usefulness screws or bolt 10, because the threaded end of the self-locking Insert Nut of rotation inhibiting is by 34 realization self-locking properties that close up, screw 10 quilts " lock " that connect are in the tapped hole of the self-locking Insert Nut of rotation inhibiting, play good anti-loosening effect, the effect that has longitudinal register simultaneously, bears longitudinal pressure.

Application of the present utility model also can be as shown in Figure 7, after thin plate 9 is gone in the self-locking Insert Nut riveting of rotation inhibiting, can screw in double-screw bolt 11 at Insert Nut, with the fixed bolt 11 of double-screw bolt 11 as other connected piece 12.Because the threaded end of the self-locking Insert Nut of rotation inhibiting is by 34 realization self-locking properties that close up, be fixed on double-screw bolt 11 on the Insert Nut by " lock " in the tapped hole of the self-locking Insert Nut of rotation inhibiting, play good anti-loosening effect, the effect that has longitudinal register simultaneously, bears longitudinal pressure.Also can be used as the tie point of other parts.

The utility model is specially adapted to vibrate bigger occasion, and it is loosening to prevent effectively that screw thread or riveting from connecting.Because Insert Nut do not need to tighten with turning tool, so that its wall thickness can be done is thinner, alleviated the weight of part, also need not add other fastening piece again and improve reliability, so the part of use is also less.Improved economic benefit.The utility model available dedicated tool processes can reduce difficulty of processing and processing cost.

Claims

1. the self-locking Insert Nut of a rotation inhibiting, this nut is a tubular shape, it is characterized in that: the endoporus of pipe comprises unthreaded hole section (1) and thread section (2), and the end of unthreaded hole section (1) is provided with countersunk head (3), countersunk head (3) be shaped as non-circular inversed taper platform; The end of thread section (2) is provided with closing in (4).

2. according to the self-locking Insert Nut of the described rotation inhibiting of claim 1, it is characterized in that: the aperture of described unthreaded hole section (1) is greater than the aperture of thread section (2).

3. according to the self-locking Insert Nut of claim 1 or 2 described rotation inhibiting, it is characterized in that: the end of described thread section (2) is provided with close up (4) at 2～4.

4. according to the self-locking Insert Nut of the described rotation inhibiting of claim 3, it is characterized in that: the end of described thread section (2) is provided with 3 closing ins (4).

5. according to the self-locking Insert Nut of the described rotation inhibiting of claim 1, it is characterized in that: the end face of described non-circular inversed taper platform (5) is the stretching circle that is made of two decentraction and the semicircle that is oppositely arranged, and the bottom surface of non-circular inversed taper platform is the circle identical with the pipe external diameter.