CN116123199A - Locking type threaded sleeve and manufacturing method thereof - Google Patents

Abstract

The invention discloses a locking type threaded screw sleeve and a manufacturing method thereof, wherein the locking type threaded screw sleeve comprises at least one spiral winding, the spiral winding comprises a first bevel edge, a second bevel edge, a third bevel edge and a wedge edge, the first bevel edge and the second bevel edge form screw sleeve external threads for being embedded into internal threads on a substrate, the third bevel edge and the wedge edge form screw sleeve internal threads, and the wedge edge is configured to enable a locking screw to have the largest radial moment after the locking moment of the locking screw is applied to the screw sleeve internal threads. The locking type threaded sleeve changes the shape of the cross section of the diamond wire, the shape of one side of the threaded sleeve is used as the direction of the force of the contact surface, and after the tightening torque of the external thread of the locking screw is applied, the contact angle of the action point of the internal thread and the external thread reach the maximum radial torque, so that after the external thread of the locking screw reaches the locking torque, the torque of the radial force reaches the maximum, and the locking and anti-loose effects are achieved.

Description

Locking type threaded sleeve and manufacturing method thereof

Technical Field

The invention relates to a threaded sleeve, in particular to a locking type threaded sleeve and a manufacturing method thereof.

Background

The steel wire thread sleeve is a novel internal thread fastener, and is suitable for threaded connection, also called a threaded sleeve, and is called a sleeve for short. The spring-shaped internal and external thread concentric body is formed by precisely processing a cold-rolled diamond stainless steel wire with high strength, high precision and smooth surface, and is mainly used for reinforcing and protecting internal threads made of low-strength materials. The steel wire thread insert is embedded into the threaded hole of low-strength engineering materials such as aluminum, magnesium alloy, cast iron, glass fiber reinforced plastic, plastic and the like, can form high-precision internal threads meeting international standards, has the functions of high connection strength, shock resistance, impact resistance and wear resistance, can disperse stress to protect the threads of the matrix, and greatly prolongs the service life of the matrix.

The cross section of the thread winding of the existing thread insert is of a diamond-shaped structure so as to form a standard triangle tooth thread. In practical use, after the bolt is screwed in, the screw thread near the contact surface end of the bolt contacts with the thread sleeve surface to form pretension due to the processing error of the screw thread in practical cases. Most of the threads do not contact and are in neutral. Therefore, the contact friction force is small, the threads are easy to loosen when the threads are vibrated by external force, and the long-term use of the bolts is further unfavorable.

Disclosure of Invention

The invention aims to provide a locking type threaded sleeve and a manufacturing method thereof, which are used for solving the problem that an electric threaded sleeve in the prior art is easy to loosen.

To achieve the purpose, the invention adopts the following technical scheme:

a locking thread insert comprising at least one spiral turn, wherein the spiral turn comprises a first beveled edge, a second beveled edge, a third beveled edge, and a wedge edge, the first beveled edge and the second beveled edge forming an insert external thread for embedding an internal thread on a substrate, the third beveled edge and the wedge edge forming an insert internal thread, the wedge edge being configured such that upon application of a locking screw locking torque to the insert internal thread, the locking screw has a maximum radial torque.

Further, the locking thread insert comprises at least two spiral coils, wherein the adjacent two spiral coils have the same pitch, and the wedge edges of each spiral coil have the same wedge angle.

Further, the wedge-shaped edge comprises a first wedge edge and a second wedge edge, and the included angle between the first wedge edge and the second wedge edge is 145-155 degrees.

Further, after the locking torque of the locking screw is applied to the internal thread of the screw sleeve, the included angle between the external thread of the locking screw and the first wedge edge is 25-35 degrees.

Further, the included angle between the first inclined edge and the second inclined edge is 55-58 degrees, and the included angle between the first inclined edge and the third inclined edge is 118-122 degrees.

Further, the included angle between the third inclined edge and the first wedge edge is 62-66 degrees, and the included angle between the second inclined edge and the second wedge edge is 86-90 degrees.

Further, the lengths of the first inclined edge and the second inclined edge are the same, the length of the third inclined edge is smaller than the length of the second inclined edge, and the length of the first wedge edge is larger than the length of the second wedge edge.

Further, the wedge edge is configured such that, upon application of a locking screw locking torque to the threaded insert, the locking screw locks onto the wedge edge in line contact therewith.

A manufacturing method of a locking type threaded screw sleeve comprises the following steps:

1) Rolling the cross section of the round steel wire into a diamond shape through a roller;

2) Preforming the steel wire rolled in the step 1) through a roller, wherein the section of the preformed steel wire is quadrilateral, and the quadrilateral has a small interval between two ends in the length direction compared with the diamond;

3) Drawing the steel wire preformed in the step 2) into a steel wire with a specified section through a polycrystalline die;

4) And (3) winding the steel wire molded in the step (3) into a threaded sleeve through a molding mandrel.

The locking type threaded sleeve has the beneficial effects that the shape of the cross section of the diamond-shaped wire is changed, the shape of one side of the threaded sleeve is used as the direction of the acting force of the contact surface, and after the tightening torque of the external thread of the locking screw is applied, the contact angle of the action point of the internal thread and the external thread reach the maximum radial torque, so that after the external thread of the locking screw reaches the locking torque, the torque of the radial force reaches the maximum, and the locking and anti-loose effects are achieved. When the structure is used for connecting screws, the structure plays a role in elastic propping of maximum radial moment, so that better locking and anti-loosening effects are achieved, and meanwhile, a certain pre-pressing effect is achieved.

Drawings

Fig. 1 is a schematic perspective view of a locking type threaded insert according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a force analysis diagram of a locking type threaded insert according to an embodiment of the present invention.

Detailed Description

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, fig. 1 is a schematic perspective view of a locking threaded insert according to an embodiment of the present invention; FIG. 2 is an enlarged view of a portion of FIG. 1 at A; fig. 3 is a force analysis diagram of a locking type threaded insert according to an embodiment of the present invention.

Example 1

A locking thread insert comprising a plurality of spiral turns 1, the spiral turns 1 comprising a first hypotenuse 10, a second hypotenuse 11, a third hypotenuse 12 and a wedge edge 13, the first hypotenuse 10 and the second hypotenuse 11 forming an insert external thread for embedding in an internal thread on a substrate, the third hypotenuse 12 and the wedge edge 13 forming an insert internal thread, the wedge edge 13 being configured such that the locking screw 2 has a maximum radial torque after a locking torque of the locking screw 2 has been applied to the insert internal thread. The wedge edge 13 is further configured such that the locking screw 2 locks onto the wedge edge 13 in line contact with the two after a locking torque of the locking screw 2 is applied to the internal thread of the threaded sleeve. The adjacent two spiral turns 1 have the same pitch and the wedge edges 13 of each spiral turn 1 have the same wedge angle.

The wedge edge 13 comprises a first wedge edge 130 and a second wedge edge 131, the lengths of the first inclined edge 10 and the second inclined edge 11 are the same, the length of the third inclined edge 12 is smaller than the length of the second inclined edge 11, the length of the first wedge edge 130 is larger than the length of the second wedge edge 131, an included angle between the first wedge edge 130 and the second wedge edge 131 is 145 degrees, after the locking moment of the locking screw 2 is applied to the internal thread of the screw sleeve, an included angle a=25 degrees between the external thread of the locking screw 2 and the first wedge edge 130, an included angle between the first inclined edge 10 and the second inclined edge 11 is 55 degrees, an included angle between the first inclined edge 10 and the third inclined edge 12 is 118 degrees, an included angle between the third inclined edge 12 and the first wedge edge 130 is 62 degrees, and an included angle between the second inclined edge 11 and the second wedge edge 131 is 86 degrees.

Example two

A locking thread insert comprising a plurality of spiral turns 1, the spiral turns 1 comprising a first hypotenuse 10, a second hypotenuse 11, a third hypotenuse 12 and a wedge edge 13, the first hypotenuse 10 and the second hypotenuse 11 forming an insert external thread for embedding in an internal thread on a substrate, the third hypotenuse 12 and the wedge edge 13 forming an insert internal thread, the wedge edge 13 being configured such that the locking screw 2 has a maximum radial torque after a locking torque of the locking screw 2 has been applied to the insert internal thread. The wedge edge 13 is further configured such that the locking screw 2 locks onto the wedge edge 13 in line contact with the two after a locking torque of the locking screw 2 is applied to the internal thread of the threaded sleeve. The adjacent two spiral turns 1 have the same pitch and the wedge edges 13 of each spiral turn 1 have the same wedge angle.

The wedge edge 13 comprises a first wedge edge 130 and a second wedge edge 131, the lengths of the first inclined edge 10 and the second inclined edge 11 are the same, the length of the third inclined edge 12 is smaller than the length of the second inclined edge 11, the length of the first wedge edge 130 is larger than the length of the second wedge edge 131, an included angle between the first wedge edge 130 and the second wedge edge 131 is 150 degrees, after the locking moment of the locking screw 2 is applied to the internal thread of the screw sleeve, an included angle a=30° between the external thread of the locking screw 2 and the first wedge edge 130, an included angle between the first inclined edge 10 and the second inclined edge 11 is 56 °, an included angle between the first inclined edge 10 and the third inclined edge 12 is 120 °, an included angle between the third inclined edge 12 and the first wedge edge 130 is 64 °, and an included angle between the second inclined edge 11 and the second wedge edge 131 is 88 °.

Example III

A locking thread insert comprising a plurality of spiral turns 1, the spiral turns 1 comprising a first hypotenuse 10, a second hypotenuse 11, a third hypotenuse 12 and a wedge edge 13, the first hypotenuse 10 and the second hypotenuse 11 forming an insert external thread for embedding in an internal thread on a substrate, the third hypotenuse 12 and the wedge edge 13 forming an insert internal thread, the wedge edge 13 being configured such that the locking screw 2 has a maximum radial torque after a locking torque of the locking screw 2 has been applied to the insert internal thread. The wedge edge 13 is further configured such that the locking screw 2 locks onto the wedge edge 13 in line contact with the two after a locking torque of the locking screw 2 is applied to the internal thread of the threaded sleeve. The adjacent two spiral turns 1 have the same pitch and the wedge edges 13 of each spiral turn 1 have the same wedge angle.

The wedge edge 13 comprises a first wedge edge 130 and a second wedge edge 131, the lengths of the first inclined edge 10 and the second inclined edge 11 are the same, the length of the third inclined edge 12 is smaller than the length of the second inclined edge 11, the length of the first wedge edge 130 is larger than the length of the second wedge edge 131, an included angle between the first wedge edge 130 and the second wedge edge 131 is 155 degrees, after the locking moment of the locking screw 2 is applied to the internal thread of the screw sleeve, an included angle a=35 degrees between the external thread of the locking screw 2 and the first wedge edge 130, an included angle between the first inclined edge 10 and the second inclined edge 11 is 58 degrees, an included angle between the first inclined edge 10 and the third inclined edge 12 is 122 degrees, an included angle between the third inclined edge 12 and the first wedge edge 130 is 66 degrees, and an included angle between the second inclined edge 11 and the second wedge edge 131 is 90 degrees.

The manufacturing method of the locking type threaded screw sleeve comprises the following steps:

1) Rolling the cross section of the round steel wire into a diamond shape through a roller;

2) Preforming the steel wire rolled in the step 1) through a roller, wherein the section of the preformed steel wire is quadrilateral, and the quadrilateral has a small interval between two ends in the length direction compared with the diamond;

3) Drawing the steel wire preformed in the step 2) into a steel wire with a specified section through a polycrystalline die;

4) And (3) winding the steel wire molded in the step (3) into a threaded sleeve through a molding mandrel.

The above embodiments merely illustrate the basic principles and features of the present invention, and the present invention is not limited to the above examples, but can be variously changed and modified without departing from the spirit and scope of the present invention, which is within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A locking thread insert comprising at least one spiral winding, wherein the spiral winding comprises a first beveled edge, a second beveled edge, a third beveled edge and a wedge edge, the first beveled edge and the second beveled edge forming an insert external thread for embedding into an internal thread on a substrate, the third beveled edge and the wedge edge forming an insert internal thread, the wedge edge being configured such that upon application of a locking screw locking torque to the insert internal thread, the locking screw has a maximum radial torque.

2. The locking thread insert of claim 1, wherein the locking thread insert comprises at least two helical turns, the helical turns having the same pitch between adjacent helical turns, the wedge edge of each helical turn having the same wedge angle.

3. The locking thread insert of claim 1, wherein the wedge edge comprises a first wedge edge and a second wedge edge, the first wedge edge having an included angle of 145 ° to 155 ° with the second wedge edge.

4. A locking thread insert as claimed in claim 3 wherein the external thread of the locking screw is at an angle of 25 ° to 35 ° to the first wedge edge after the locking torque is applied to the internal thread of the insert.

5. The locking thread insert of claim 4, wherein the first angled edge is angled from 55 ° to 58 ° relative to the second angled edge and the first angled edge is angled from 118 ° to 122 ° relative to the third angled edge.

6. The locking thread insert of claim 5, wherein the third beveled edge is angled from 62 ° to 66 ° to the first wedge edge and the second beveled edge is angled from 86 ° to 90 ° to the second wedge edge.

7. The locking thread insert of claim 6, wherein the first and second tapered edges are the same length, the third tapered edge is less than the second tapered edge, and the first tapered edge is greater than the second tapered edge.

8. The locking thread insert of claim 1, wherein the wedge edge is configured such that upon application of a locking screw locking torque to the insert internal thread, the locking screw locks onto the wedge edge in line contact therebetween.

9. A method of manufacturing a locking thread insert as claimed in any one of claims 1 to 8, comprising the steps of:

1) Rolling the cross section of the round steel wire into a diamond shape through a roller;

2) Preforming the steel wire rolled in the step 1) through a roller, wherein the section of the preformed steel wire is quadrilateral, and the quadrilateral has a small interval between two ends in the length direction compared with the diamond;

3) Drawing the steel wire preformed in the step 2) into a steel wire with a specified section through a polycrystalline die;

4) And (3) winding the steel wire molded in the step (3) into a threaded sleeve through a molding mandrel.

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