CN215980339U

CN215980339U - Fastener and installation screwdriver matched with same

Info

Publication number: CN215980339U
Application number: CN202122472378.XU
Authority: CN
Inventors: 陈佃峰; 胡付红; 李迪; 刘鸿昊
Original assignee: Oriental Bluesky Titanium Technology Co ltd
Current assignee: Oriental Bluesky Titanium Technology Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-03-08
Anticipated expiration: 2031-10-14

Abstract

The utility model relates to a fastener and an installation screwdriver matched with the fastener, wherein the fastener comprises a head and a screwing part, a screwing groove is arranged on the head and/or the screwing part, the outline of the screwing groove comprises a plurality of blade lines, the blade lines are uniformly distributed in the circumferential direction in an end-to-end connection mode, the blade lines comprise a first arc line and a second arc line, and the first arc line and the second arc line are respectively arranged in a convex mode. And the first arc line of the blade profile is in transition with the second arc line of the blade profile adjacent to the first arc line through a third arc line, and the third arc line is arranged in an inward convex mode. The mounting screwdriver comprises a screwdriver head, and the screwdriver head is matched with the screwing groove of the fastener. The profile of the wrenching groove is provided with a plurality of blade-shaped lines which are regularly distributed along the circumferential direction, the structure is simple, the processing is convenient, the installation torque of the fastener is greatly improved, the requirement of the fastener on large-torque installation is met, and meanwhile, the wrenching groove is safer and more reliable, can be applied to occasions where high torque easily causes slipping, and reduces the installation failure rate.

Description

Fastener and installation screwdriver matched with same

Technical Field

The utility model relates to a fastener and an installation screwdriver matched with the fastener, and belongs to the technical field of fasteners.

Background

In recent years, with the improvement of the requirement of installation torque, when a fastener is installed, a pulling and twisting structure on the fastener often has a 'slipping' phenomenon, namely when the fastener does not reach the installation torque, a pulling and twisting groove on the fastener is deformed, the installation requirement of the fastener cannot be met, and the fastener is frequently failed in an installation field. Common fasteners adopt a straight groove or cross groove structure, the structure is labor-saving in wrenching, but the pressure-bearing surface is small, the slipping phenomenon is easy to occur, and the common fasteners are difficult to use in occasions requiring high torque. Therefore, the structure forms such as the hexagonal quincuncial groove and the pentagonal quincuncial groove are provided, the pressure bearing surface during wrenching is obviously increased by the structure, but the component of wrenching force in the tangential direction is reduced due to the pressure bearing angle of the quincuncial groove, and higher requirements are provided for the wrenching force; for example, when a high-locking bolt product for civil use, such as an inner hexagonal groove type fastener, is assembled in a field gap, the failure rate is about 30%, and a large amount of economic loss is caused.

The operation of the fastener is more strict in aerospace occasions, the fastening force with enough strength is required, namely enough screwing torque is required, and the slip phenomenon is not allowed to occur; but also requires the operation to be relatively labor-saving and convenient. This places new demands on the structure of the fastener.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the fastener and the mounting screwdriver matched with the fastener, wherein the fastener is simple in structure, labor-saving in operation, low in failure rate and safer, and can be applied to high-torque occasions.

The technical scheme for solving the technical problems is as follows: the utility model provides a fastener, includes head and spiro union portion, be equipped with on the head and/or the spiro union portion and pull the wrong groove, pull the profile in wrong groove and include a plurality of leaf molded lines, it is a plurality of leaf molded line end to end along circumferencial direction evenly distributed, the leaf molded line includes first pitch arc and second pitch arc, first pitch arc and second pitch arc are the evagination setting respectively.

The utility model has the beneficial effects that: the convex arrangement means that the arc line protrudes towards the direction far away from the center of the wrenching groove; the blade-shaped lines are connected end to end along the regular distribution in the circumferential direction, the wrenching groove is simple in structure, convenient to machine and low in machining cost, the installation torque of the fastener is greatly improved, the requirement of the fastener for large-torque installation is met, and meanwhile, the blade-shaped line is safe and reliable, can be applied to the occasions where high torque easily causes slipping, and reduces the installation failure rate.

On the basis of the technical scheme, the utility model can be further improved as follows.

Further, the length of the first arc is greater than the length of the second arc.

The adoption of the further scheme has the beneficial effects that the first arc line is longer than the second arc line, the profile of the blade profile is longer on one side of the intersection point of the two arc lines than on the other side, so that the contact area with the mounting screwdriver can be increased, and the torsional strength of the wrenching groove is increased; in addition, when clockwise rotation, the second pitch arc is as pulling the pressure-bearing face and rotating at tangential direction component increase for the spanner, has both been favorable to bearing rotation torsion, has also guaranteed the total pressure-bearing area. Especially, the labor is saved compared with a quincunx structure.

Further, the curvature of the first arc is smaller than the curvature of the second arc.

The beneficial effects of adopting above-mentioned further scheme are that, first pitch arc length and degree of curvature are little, the second pitch arc is short and degree of curvature is big, the leaf profile line presents the skewed ratchet tooth structure, provide higher installation moment of torsion for wrenching the groove, first pitch arc can play the effect that the utensil is revolved in the restraint installation, second pitch arc camber is big, not only increased with the installation area of contact of utensil soon, prevent to skid, the turning force that acts on the second pitch arc is big at tangential direction component moreover, it is more laborsaving to operate, especially, be suitable for using in the aerospace field.

Furthermore, the first arc line of the blade line and the second arc line of the blade line adjacent to the first arc line are in transitional connection through a third arc line, and the third arc line is arranged in an inward convex mode.

The adoption of the further scheme has the beneficial effects that the inward convex finger arc line protrudes towards the center direction of the wrenching groove; protruding structure in the smooth formation of protruding through protruding circular arc connection in between first pitch arc and the second pitch arc, the indent of third pitch arc and the evagination cooperation of second pitch arc have formed that the second pitch arc is sunken, raise upward or go up the outstanding on the third pitch arc, can not only avoid appearing skidding phenomenon in the high moment of torsion, can increase moreover and pull the area of contact between groove and the installation utensil soon, have further increased and have pulled the torsional strength who twists the groove.

Furthermore, a first tangent and a second tangent are respectively arranged on the first arc line and the second arc line, and an included angle between a connecting point of the first arc line and the second arc line and a connecting line of the center of the wrenching groove and the first tangent is theta 2; an included angle between a connecting point of the first arc line and the second arc line and a connecting line of the center of the wrenching groove and the second tangent line is theta 3, and the angle of theta 2 is larger than the angle of theta 3.

The further scheme has the advantages that the angle of theta 2 and theta 3 can be adjusted and the inclination angle of the blade profile can be adjusted according to different requirements of different use environments on installation torque; the proper torque strength which can be borne by the wrenching groove is ensured, the weight and the processing difficulty of the bolt are reduced, and the method is particularly important in the connection field which is sensitive to weight, such as aerospace and the like.

Further, the theta 2 is 25-45 degrees; the theta 3 is 12-35 degrees.

The further scheme has the beneficial effects that the reasonable angle value is selected according to different use requirements of different connecting parts, and the optimal torque and the overall mechanical property of the product can be ensured in high-vibration and high-fatigue-resistance use environments such as aerospace, nuclear power and the like.

Further, the profile line is provided with three, five, six or eight.

The beneficial effect of adopting above-mentioned further scheme is that, can be according to the user demand of different fasteners, select the leaf type line of suitable quantity.

Further, the diameter of the grooved wheel profile of the screwing groove on the screwing part is equal to or smaller than the diameter of the grooved wheel profile of the screwing groove on the head part.

Adopt above-mentioned further scheme's beneficial effect be, can set up the groove of twisting of pulling that corresponds the matching rather than the size according to the head of fastener and spiro union portion size to guarantee the intensity and the stability of fastener.

Furthermore, a process taper hole is also arranged in the screwing groove.

The further scheme has the beneficial effect that the groove is convenient to process.

The utility model also relates to an installation screwdriver, which comprises a screwdriver head, wherein the screwdriver head is matched with the screwing groove of the fastener.

The utility model has the beneficial effects that: the screwdriver head is matched with the screwing groove, the screwdriver head is inserted into the screwing groove on the head portion or the screwing portion of the fastener, the screwdriver is installed through external force rotation to drive installation and disassembly of the fastener, the fastener can be installed and disassembled by using a wind trigger, installation and disassembly are more efficient, operation intensity is further reduced, installation torque of the fastener is greatly improved, and requirements of the fastener for aerospace on large-torque installation can be met.

Furthermore, a screwdriver connecting rod is arranged on the screwdriver head and is of a flat structure, and an installation fixing hole is formed in the screwdriver connecting rod.

The beneficial effect who adopts above-mentioned further scheme is that, can realize the installation and the location of screwdrivers through the installation fixed orifices, and the flat structure further ensures the installation stability of screwdrivers head.

Drawings

FIG. 1 is a schematic structural view of a fastener of the present invention;

FIG. 2 is a schematic structural view of a first wrenching groove according to the present invention;

FIG. 3 is a schematic structural view of a second wrenching slot according to the present invention;

FIG. 4 is a schematic structural view of a third wrenching groove of the present invention;

FIG. 5 is a schematic view of the construction of the mounting screw of the present invention;

FIG. 6 is a schematic diagram of the right side view of FIG. 5;

FIG. 7 is a schematic view of the fastener of the present invention in engagement with a driver head;

in the drawings, 1, a fastener; 11. a head portion; 12. a screw connection part; 2. wrenching the groove; 21. a leaf profile; 22. a first arc line; 23. a second arc; 24. a third arc; 3. a taper hole; 4. installing a screwdriver; 41. a screwdriver head; 42. a screwdriver connecting rod; 43. and installing a fixing hole.

Detailed Description

The principles and features of this invention are described below in conjunction with examples, which are set forth to illustrate, but are not to be construed to limit the scope of the utility model.

As shown in fig. 1 to 4, a fastener 1 includes a head 11 and a screwing portion 12, a screwing groove 2 is provided on the head and/or on the screwing portion, an outline of the screwing groove 2 includes a plurality of blade lines 21, the plurality of blade lines 21 are uniformly distributed along a circumferential direction in an end-to-end connection manner, the blade lines 21 include a first arc line 22 and a second arc line 23, and the first arc line and the second arc line are respectively convex. The convex arrangement means that the arc line protrudes towards the direction away from the center of the wrenching groove.

The length of the first arc is greater than the length of the second arc. The first arc line is longer than the second arc line, the contour line of the blade line is longer than the other side on one side of the intersection point of the two arc lines, the contact area of the blade line and the installation rotating tool can be increased, and the torsional strength of the wrenching groove is increased; in addition, as shown in fig. 2, when the wrench rotates clockwise, the second arc line is used as a wrenching pressure-bearing surface, and the component of the wrench rotation in the tangential direction is increased, so that the wrench not only is beneficial to bearing the rotation torque, but also ensures the total pressure-bearing area. Especially, the labor is saved compared with a quincunx structure.

The curvature of the first arc is less than the curvature of the second arc. First pitch arc length and degree of curvature are little, and second pitch arc is short and degree of curvature is big, and the leaf profile line presents the skewed tooth structure, for pulling up to twist the groove and provide higher installation moment of torsion, and first pitch arc can play the effect of restraint installation utensil soon, and second pitch arc camber is big, has not only increased the area of contact with the installation utensil soon, prevents to skid, and the turning force that acts on the second pitch arc is big at tangential direction component moreover, and it is more laborsaving to operate, especially is suitable for using in the aerospace field.

The first arc line of the blade profile is in transitional connection with the second arc line of the blade profile adjacent to the first arc line of the blade profile through a third arc line 24, and the third arc line is arranged in an inward convex mode. The inward convex arrangement refers to that an arc line protrudes towards the center direction of the wrenching groove; the first arc line and the second arc line are connected through the inward convex circular arc to form a smooth inward convex structure, so that the contact area between the wrenching groove and the mounting screwdriver is increased, and the torsional strength of the wrenching groove is further increased.

A first tangent and a second tangent are respectively arranged on the first arc line and the second arc line, and an included angle between a connecting point of the first arc line and the second arc line and a connecting line of the center of the wrenching groove and the first tangent is theta 2; an included angle between a connecting point of the first arc line and the second arc line and a connecting line of the center of the wrenching groove and the second tangent line is theta 3, and the angle of theta 2 is larger than the angle of theta 3. The connecting point of the first arc line and the second arc line and the connecting line of the center of the wrenching groove divide the included angle of the tangent into theta 2 and theta 3. The tangent line and the corresponding arc have an intersection point, and the straight line of the intersection point and the circle center of the arc is perpendicular to the tangent line. Aiming at different requirements of different use environments on installation torque, the angles theta 2 and theta 3 can be adjusted, and the inclination angle of the blade profile can be adjusted. The proper torque strength which can be borne by the wrenching groove is ensured, the weight and the processing difficulty of the bolt are reduced, and the method is particularly important in the connection field which is sensitive to weight, such as aerospace and the like.

The theta 2 is 25-45 degrees; the theta 3 is 12-35 degrees. According to different use requirements of different connection parts, a reasonable angle value is selected, and the optimal torque and the overall mechanical property of the product can be ensured in high-vibration and high-fatigue-resistance use environments such as aerospace and nuclear power.

The number of the blade profiles is three, five, six or eight. The proper number of the blade profiles can be selected according to the use requirements of different fasteners. The diameter of the grooved wheel contour line of the pulling and twisting groove on the screwing part is equal to or smaller than that of the grooved wheel contour line of the pulling and twisting groove on the head part. The pulling and screwing groove which is correspondingly matched with the head part and the screwing part of the fastener can be arranged according to the size of the head part and the screwing part of the fastener, so that the strength and the stability of the fastener are ensured.

And a process taper hole 3 is also arranged in the wrenching groove. The groove is convenient to be processed.

As shown in fig. 2, the wrenching grooves include five blade profiles; as shown in fig. 3, the wrenching grooves include six blade profiles; as shown in fig. 4, the wrenching grooves include eight blade profiles.

As shown in fig. 5-7, the present invention also relates to a mounting driver 4 comprising a driver head 41 that fits into the wrenching grooves of the fastener as described above.

The screwdriver head is provided with a screwdriver connecting rod 42 which is of a flat structure, and the screwdriver connecting rod is provided with an installation fixing hole 43. The mounting and positioning of the screwdriver can be realized through the mounting and fixing holes, and the flat structure further ensures the mounting stability of the screwdriver head.

The wrenching grooves can be located at the upper end of the head of a fastener such as a bolt/screw or at the tail of a screw or a threaded rod; utilize novel fastener installation to revolve the utensil and apply installation torque for novel twisting the groove and accomplish the installation to when solving the tradition and pull twisting the groove and apply high installation torque, especially at clearance fit installation environment, cause the scheduling problem that skids easily. Through the setting of novel twisting cell type and installation utensil soon, at the high moment of torsion occasion of using, solve the installation and skid the scheduling problem, reduce the installation failure rate. According to the utility model, through the arrangement of the novel wrenching groove type and the installation rotating tool, the installation of the fastener can be realized by using the pneumatic wrench, the installation is more efficient, and the operation intensity is reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The fastener comprises a head and a screwing part, and is characterized in that the head and/or the screwing part is provided with a screwing groove, the outline of the screwing groove comprises a plurality of blade lines which are uniformly distributed along the circumferential direction in an end-to-end manner, the blade lines comprise a first arc line and a second arc line, and the first arc line and the second arc line are respectively arranged in a convex manner.

2. The fastener of claim 1, wherein the length of the first arc is greater than the length of the second arc.

3. A fastener according to claim 2, wherein the curvature of the first arc is less than the curvature of the second arc.

4. A fastener according to any one of claims 1 to 3, wherein the first camber line is transitionally connected to the second camber line of the adjacent blade line by a third camber line, the third camber line being inwardly convex.

5. The fastener according to claim 4, wherein a first tangent and a second tangent are respectively arranged on the first arc line and the second arc line, and an included angle between a connecting point of the first arc line and the second arc line and a connecting line of the center of the wrenching groove and the first tangent is theta 2; an included angle between a connecting point of the first arc line and the second arc line and a connecting line of the center of the wrenching groove and the second tangent line is theta 3, and the angle of theta 2 is larger than the angle of theta 3.

6. The fastener of claim 5, wherein θ 2 is 25 ° to 45 °; the theta 3 is 12-35 degrees.

7. A fastener according to claim 1 or 2 or 3, wherein there are three, five, six or eight of the leaf profiles.

8. The fastener of claim 1, wherein a diameter of a sheave profile of the wrenching grooves on the threaded portion is equal to or less than a diameter of a sheave profile of the wrenching grooves of the head portion.

9. A mounting driver comprising a driver head which mates with a wrenching groove on a fastener as claimed in any one of claims 1 to 8.

10. The mounting screwdriver as recited in claim 9, wherein said screwdriver head has a screwdriver attachment shaft, said screwdriver attachment shaft is of a flat configuration, and said screwdriver attachment shaft has mounting holes.