CN113931918B

CN113931918B - Taper needle type anti-loose nut

Info

Publication number: CN113931918B
Application number: CN202010671705.1A
Authority: CN
Inventors: 何天麟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2023-03-14
Anticipated expiration: 2040-07-13
Also published as: CN113931918A

Abstract

The taper pin type anti-loose nut is divided into an extrusion type nut and a stamping type nut, and is a two-stage anti-loose nut with functions of impact extrusion installation anti-loose and reverse rotation disassembly (vibration) anti-loose, the highest anti-loose torque is 439-722N.m when the M20 extrusion (stamping) taper pin type anti-loose nut is detected by Jiangsu province product quality supervision and inspection research institute, and the data of the anti-loose torque N.m is almost close to that of spot welding and adhesive connection nuts and screw rod detection, so that the problems that in the prior art, holes are respectively formed in the screw rod and the nut in advance, key checking, pin checking and the like can only prevent the nut from falling off and cannot solve the defect that the nut is anti-loose are solved, and the taper pin type anti-loose nut can be used for various mechanical equipment, roads, bridges, power grid iron towers, aviation and other equipment without the matched fasteners for disassembling parts.

Description

Taper needle type anti-loose nut

Belongs to the technical field of:

the invention relates to a mechanical fastener, in particular to a two-stage taper needle type anti-loose nut with an undetachable bidirectional retaining function.

Background art:

the invention relates to a taper needle type anti-theft nut which is improved on the basis of a patent number ZL201410457881.X which is granted on 5, month and 4 days in 2016.

The invention content is as follows:

the invention improves the anti-loose sensitivity on the basis of the anti-loose mechanism of the taper needle type anti-theft nut, changes the manufacturing of the red heading machine into the manufacturing of the high-speed cold heading machine, reduces the manufacturing cost and improves the productivity.

The technical problem to be solved;

the technical problems that the depth of a groove is changed due to the fact that an anti-rust hot-dip galvanized layer is adopted in the taper pin type anti-theft nut, the meshing strength of original steel materials is covered, anti-loosening sensitivity is affected and the like are solved, and the technical problems that the shape of the groove needs to be changed and process steps need to be increased reasonably due to the fact that a high-speed cold heading machine manufacturing process is changed from a red heading manufacturing process.

The technical scheme is as follows:

the taper needle type anti-loosening nut is divided into an extrusion type nut and a stamping type nut, and the nut body is characterized as follows; (one) common features; the wall of an internal thread of a common nut is provided with one to two grooves, the grooves are formed by combining two inclined planes in different directions, the radial direction is along the screwing-in direction of the internal thread, the arc-shaped slope surface is from shallow to deep, the deep end can accommodate the one-way force application groove of the conical needle, the axial direction is from the radial arc-shaped groove backwards, the slope surface is from deep to shallow, the internal thread is communicated up and down, the slope degree is the same as the taper degree of the conical needle, the connecting part of the large end of the axial inclined plane of the groove and the end surface of the nut body is reserved, the process steps which can be accommodated in the cold heading manufacturing process are reserved, a blank (steel) expands towards the end surface of the nut to extend out a concave table of surplus materials or a large chamfer angle space, in order to accord with the process steps of the production of a high-speed nut cold heading machine, the wall of the grooves is firstly processed into an axial trapezoidal step type arc-shaped wall surface, the fifth die path and the sixth die path process are extruded into the arc-shaped slope wall surface of the trapezoidal step, the trapezoidal step type slope-shaped groove, the number of the trapezoidal step type slope-shaped groove is determined according to the thickness of the nut, and the trapezoidal step type slope connection groove type mark is allowed to appear on the groove by cold heading process.

(II) distinguishing characteristics; the extrusion nut groove formed by four parts of the extrusion nut body, the conical needle, the sheath and the retainer ring is arranged on the forced end face of the nut body along the radial direction of the large arc-shaped slope face, and the small arc-shaped slope face is arranged on the non-forced end face. The groove is arranged on the non-acting end face of the nut body along the radial direction of the large arc-shaped slope face, and the small arc-shaped slope face is arranged on the acting end face. The awl is characterized in that; the pin is a hard taper pin, and the retainer ring is characterized in that; is a common gasket. The protective sleeve is a plastic protective sleeve which does not affect the screwing of the wrench, can contain the nut body to fix the taper needle, guides the taper needle to enter the groove and immediately breaks after being subjected to extrusion force.

An assembly feature;

in order to ensure the fit clearance of the internal thread and the external thread and not influence the screwing-in and screwing-out of the nut, the conical needle outcrop is adhered in the groove in advance by using butter for combined assembly, and invention patents applied in 2019, 10, month and 24 are added; a taper needle type anti-theft nut sheath, application number; 5363 and the mounting speed is improved by combining and assembling 201911020244.5.

Mounting features of extruded nuts;

the screw rod outcrop part with installation fastening bolt and nut is put into the shelves circle, has the thrust end face of awl needle with extrusion formula nut, to shelves circle screw in screw rod after, at the in-process of screwing up with the spanner, outcrop awl needle relies on connecting piece and fastening nut terminal surface to block the reverse extrusion awl needle of shelves circle, by the broken coming off of plastics sheath guide awl needle along oblique wall face entering slot on the way extrusion, gets rid of the zinc layer and reaches the static cooperation, reaches the locking effect of unloading that improves sensitivity.

A stamped nut mounting feature;

the force application end face of the stamping nut is screwed in the screw rod outcrop part for installing the fastening bolt and the nut, the stamping nut is screwed by a wrench to wait for acceptance and acceptance, then the conical needle is impacted by a hand hammer through the sleeve, the plastic sheath is broken and falls off by impact force, the conical needle enters the groove along the inclined wall surface and is pressed into the outer thread cusp to achieve interference fit, the anti-loosening and unloading effect cannot be easily loosened even in a strong vibration environment, and the installed conical needle large head cannot be blocked by the rear screw rod full-tooth external thread without extrusion damage.

A release prevention mechanism;

the zinc material features that the zinc material is soft and has no hardness, the surface of the hot dip galvanized matching thread replaces the original steel material meshing strength, the taper needle is adopted to extrude the oblique wall surface of the groove and the zinc layer of the external thread tooth tip, and the residual zinc layer is pressed into the groove step to connect the gravure groove and the external tooth groove, so that the space of the rolling stopping action of the taper needle in the groove is not influenced, the thread matching clearance is thoroughly eliminated, and the anti-loosening sensitivity is improved.

And (II) in the installation process, the punching (extruding) taper pin eliminates the zinc layer (pressing into the outer thread cusp), the original steel hardness meshing is achieved, the taper pin load in the groove is uniformly distributed, 80% of total load is avoided when the common nut is meshed on the whole length line of the extruded outer thread, the weak point concentrated on the thread contact surface of the front two teeth is avoided, and the punching type nut also has a special fixing function on any position of the screw for the anti-loosening function of installation.

And (III) in the disassembly process, the conical needle is pushed to rapidly expand and roll in a fan shape along the screw rod by the aid of the radial arc-shaped slope bottom wall surface of the groove under the pushing of the reverse rotation (vibration) force, the working height of the thread from the tooth point of the external thread to the depth of the tooth root is extruded, the reverse rotation force is larger, the conical needle is pressed into the screw rod deeper, and the generated disassembly-preventing torque N.m is higher. Therefore, the M16 taper needle type nut has a detection result that when the anti-disassembly torque is detected to be N.m in the product quality supervision and inspection research institute in Jiangsu province, the bolt of the sample is unscrewed, and the nut cannot be easily unscrewed.

The anti-loosening structure is not influenced by the tolerance control of the external thread of the screw, and even if the anti-loosening structure is arranged on a toothless polished rod with the tolerance of 0.20nn negative to the internal thread hole, the anti-loosening structure also has the special anti-loosening function of fixing the polished rod in a reverse rotation mode and preventing the polished rod from falling off.

The change of the awl;

the conical needle is pushed by the reverse rotation (vibration) force, the nut body is shifted to the radial arc-shaped slope bottom wall surface of the groove, the conical needle is pushed to expand along the screw rod and roll and extrude in a fan-shaped mode to form a secondary loosening and unloading prevention structure, if the conical needle is changed into a triangular (polygonal and knurled) conical needle, the conical needle which is punched (extruded) into the groove is positioned and fixed at one time to form a non-detachable structure, the unloading prevention torque is N.m, and the unloading prevention structure is naturally smaller than the secondary loosening and unloading prevention structure.

A totally-enclosed extrusion type nut;

the screw thread on the non-acting end face of the extrusion type nut body is reserved for saving the design of a plastic sheath, the acting end face is provided with a concave platform which can contain the thickness of a check ring and is larger than the exposed height of a taper needle, the check ring is adhered to the opening of the concave platform by using glue, and the taper needle is collected in the totally-closed extrusion type nut in the groove under the condition that the taper needle does not influence the screwing of the nut body into a screw, so that the taper needle can be conveniently extruded and directly enter the groove after the check ring is reversely extruded by a fastening nut and degummed.

The invention has the beneficial effects that:

the invention has the advantages that the basic detection anti-unloading torque N.m data of the taper needle type anti-theft nut is kept, the interference of a zinc layer is eliminated, the anti-loosening sensitivity is improved, the original seven nut red upsetting running water process is changed into the high-speed nut cold heading machine manufacturing, the manufacturing cost is reduced, the production speed is improved, and compared with the Japanese HardLock never-loose nut, the anti-unloading function high-grade nut is added.

Description of the drawings:

FIG. 1; a squeeze-type nut body; front view

FIG. 2; a squeeze-type nut body; left view

FIG. 3; punching the nut body; right side view

FIG. 4; punching a nut body; front view

FIG. 5; a conical needle; front view

FIG. 6; a retainer ring; front view

FIG. 7; a plastic sheath; front view

FIG. 8; a plastic sheath; left view

FIG. 9; assembling an extrusion nut; front view

FIG. 10; assembling the extrusion nut; A-A direction half section view

FIG. 11; assembling a stamped nut; front view

FIG. 12; assembling a stamped nut; B-B direction half-sectional view

FIG. 13; installing an extrusion type nut retainer ring; schematic diagram of

FIG. 14; screwing in the extrusion type nut; schematic diagram of

FIG. 15; the wrench is screwed up to install the extrusion nut; schematic diagram of

FIG. 16; screwing in the stamped nut; schematic diagram of

FIG. 17; screwing the extrusion type nut by a wrench; schematic diagram of

FIG. 18; the sleeve is impacted by the hand hammer, and the conical needle for crushing the sheath is inserted into the groove; schematic diagram of

FIG. 19; front view of totally enclosed type extrusion nut

FIG. 20; schematic diagram of screwing-in full-closed type extrusion nut

FIG. 21; schematic diagram of fully-enclosed extrusion nut screwed by wrench

In FIGS. 1 to 21

1; extrusion type nut body

2; stamping type nut body

3; taper needle

4; check ring

5; taper needle type anti-theft nut sheath

6; bolt

7; nut

8; connecting piece

9; connected piece

10; spanner

11; sleeve barrel

12; hand hammer

13; totally enclosed extrusion nut

The specific implementation mode is as follows:

the invention is described in detail below with reference to the accompanying drawings:

example 1:

the awl pin locknut assembly feature shown in fig. 1, 2, 5, 6, 7, 8, 9, 10; the extrusion nut is assembled by four parts, namely an extrusion nut body 1, a conical needle 3, a retainer ring 4 and a sheath 5, as shown in a figure 9 and a figure 10.

Example 2:

a compression nut mounting feature as shown in fig. 13-14-15; put into the shelves circle 4 to the screw rod 6 outcrop part with installation fastening bolt 6 and nut 7, have the thrust end face of awl needle 3 with extrusion formula nut picture 11 figure 12, behind the screw rod 6 of shelves circle 4 screw in, at the in-process of screwing up with spanner 10, outcrop awl needle 3 relies on by connecting piece 9 and fastening nut 7 terminal surface to block 4 backward extrusion awl needles of shelves circle, it is broken and drops to get into the slot on the way along the inclined wall face extrusion by plastic sheath 5 guide awl needle 3, it reaches the static fit to get rid of the zinc layer, reach the locking effect of unloading that improves sensitivity.

Example 3:

the awl needle locknut assembly feature shown in fig. 3, 4, 5, 7, 8, 11, 12; the punch nut is assembled by three parts, namely a punch nut body 2, a conical needle 3 and a sheath 5, and is shown in figure 11 and figure 12.

Example 4:

a stamped nut mounting feature as shown in fig. 16, 17, 18; the force application end face of a punch nut 11 and 12 is screwed in the outcrop part of a screw 6 for installing a fastening bolt 6 and a nut 7, the punch nut 11 and 12 is screwed by a wrench 10 until the punch nut 11 and 12 is qualified by inspection, then a hammer 12 is used for impacting a conical needle 3 through a sleeve 11, the conical needle 3 is impacted, broken and falls off on a plastic sheath 5, the conical needle 3 enters a groove along an inclined wall face and is pressed into an outer thread cusp 6 to achieve interference fit, the anti-loosening effect cannot be easily loosened even in a strong vibration environment, and the large end of the installed conical needle 3 cannot fall off due to the blocking of the full-thread outer thread of the screw 6 without extrusion damage at the back.

Example 5:

the awl pin locknut assembly feature shown in fig. 19, 20, 21; the screw thread on the non-acting end face of the extrusion type nut body 1 is reserved for saving the design of the plastic sheath 5, the thickness of the retaining ring 4 which is larger than the height of the protruding head of the conical needle 3 is arranged on the acting end face, the retaining ring 4 is adhered to the opening of the concave platform by glue, the conical needle 3 is collected in the totally-closed extrusion type nut in the groove under the condition that the conical needle 3 does not influence the screwing of the nut body 1 into the screw 6, and the conical needle 3 is convenient to extrude after the retaining ring 4 is reversely extruded by the fastening nut 7 to degum in the installation process and directly enters the groove.

Example 6:

the taper pin locknut mechanism shown in FIG. 18 and FIG. 21; in the installation process, the conical needle 3 is adopted to extrude the inclined wall surface of the groove and the zinc layer of the external thread cusp, the thread fit clearance is thoroughly eliminated, the hardness meshing of the original steel materials is achieved, the anti-loosening weak point that only 80% of the total load is concentrated on the thread contact surface of the front two teeth when the common nut 7 is meshed is filled, and the secondary anti-loosening function is generated under the pushing of the reverse rotation (vibration) force. The anti-loosening structure is not influenced by the control of the tolerance of the external thread of the screw 6, and even if the anti-loosening structure is arranged on a toothless polished rod which is minus the tolerance of the internal thread hole by 0.20nn, the anti-loosening structure also has the special anti-loosening function of reversely rotating and fixing without falling off.

The above examples do not limit the invention in any way, and all technical solutions obtained by means of equivalents or equivalent variations fall within the scope of the invention.

Claims

1. The utility model provides a awl needle formula locknut which characterized in that: the extrusion nut is composed of an extrusion nut body, a conical needle, a protective sleeve and a retaining ring, one to two grooves are arranged on the wall of an internal thread hole of the nut body, the grooves are radially arranged along the screwing-in direction of the internal thread, the grooves are deep and shallow arc-shaped slope surfaces, the deep ends can accommodate the conical needle, the axial direction is the direction from the radial arc-shaped grooves to the non-force end surfaces of the nut body, the slope is the slope surfaces extending deep and shallow, the slope is the same as the taper of the conical needle, the large end ports of the arc-shaped grooves are provided with technological concave platforms, the small ends allow the retention of full-tooth threads, imprint grooves left on the slope surfaces by the step of the trapezoidal arc shape modified by cold heading are reserved, the conical needle is a conical pin, the protective sleeve is a gasket, the gasket is arranged close to the force end surfaces of the nut body, and the protective sleeve is a plastic protective sleeve capable of containing the nut body and fixedly guiding the conical needle to enter the grooves and being subjected to impact extrusion crushing.

2. The utility model provides a awl needle formula locknut which characterized in that: the punched nut consists of a punched nut body, a conical needle and a protective sleeve, wherein one to two grooves are arranged on the wall of an internal thread hole of the nut body, the radial direction of each groove is along the screwing-in direction of the internal thread, the groove is deep into a shallow arc-shaped slope surface, the deep end of each groove can accommodate the conical needle, the axial direction of each groove is along the direction from the radial arc-shaped groove to the non-acting end surface of the nut body, the slope of each groove is the same as the taper of the conical needle, a large port of each arc-shaped groove is provided with a process concave table, the small end of each groove allows the retention of the full-tooth thread, a blot groove left by a trapezoid-shaped step modified by cold heading is reserved on each slope, the conical needle is a conical pin, and the protective sleeve is a plastic protective sleeve capable of containing the nut body to fixedly guide the conical needle into the grooves and being crushed by punching and extrusion.