阅读说明：本技术 无内套线簧孔及其组装方法 (Spring hole without inner sleeve wire and assembling method thereof ) 是由 郭朝纶 裴婷婷 古晓东 张佳晨 于 2020-03-24 设计创作，主要内容包括：本发明涉及一种无内套线簧孔及其组装方法。无内套线簧孔包括前护套,前端为插接端,供适配的插针插入；线簧丝,形成双曲面结构,用于与插针插配,线簧丝的前端与前护套的前端固定连接；还包括端接后套,前端沿周向分布有多个限位槽,各限位槽均沿前后延伸；端接后套的前端插接装配在前护套中,线簧丝一一对应地定位插装在限位槽中,在端接后套和前护套相对转动设定角度并固定装配在一起时,线簧丝的前端和后端周向错位而形成的双曲面结构；端接后套的后端设置端接结构,用于连接到对应的线路中。本发明的无内套线簧孔相对于现有技术中的无内套线簧孔,不需要再设置过渡芯轴,可相对缩短整个线簧孔的轴向长度,利于产品的高精密集成化发展。(The invention relates to a spring hole without an inner sleeve wire and an assembling method thereof. The inside-sleeved wire spring hole comprises a front sheath, and the front end of the inside-sleeved wire spring hole is a splicing end for inserting an adaptive contact pin; the wire spring wire forms a hyperboloid structure and is used for being inserted and matched with the contact pin, and the front end of the wire spring wire is fixedly connected with the front end of the front sheath; the front end of the rear sleeve is circumferentially provided with a plurality of limiting grooves, and each limiting groove extends forwards and backwards; the front end of the terminating rear sleeve is inserted and assembled in the front sheath, the wire spring wires are correspondingly positioned and inserted in the limiting grooves one by one, and when the terminating rear sleeve and the front sheath rotate relative to each other by a set angle and are fixedly assembled together, the front end and the rear end of the wire spring wires are circumferentially staggered to form a hyperboloid structure; the rear end of the termination rear sleeve is provided with a termination structure for connection into a corresponding line. Compared with the non-inner-sleeve wire spring hole in the prior art, the non-inner-sleeve wire spring hole does not need to be provided with a transition mandrel, can relatively shorten the axial length of the whole wire spring hole, and is beneficial to the high-precision and intensive development of products.)

1. A threadless inner wire spring hole comprising:

The front end of the front sheath is a plug-in end for inserting an adaptive contact pin;

The wire spring wire forms a hyperboloid structure and is used for being inserted and matched with the contact pin, and the front end of the wire spring wire is fixedly connected with the front end of the front sheath;

The device is characterized by also comprising a terminating rear sleeve, wherein a plurality of limiting grooves are distributed at the front end of the terminating rear sleeve along the circumferential direction, and each limiting groove extends forwards and backwards;

The front end of the terminating rear sleeve is inserted and assembled in the front sheath, the wire spring wires are correspondingly positioned and inserted in the limiting grooves one by one, and when the terminating rear sleeve and the front sheath rotate relatively to set angles and are fixedly assembled together, the front end and the rear end of the wire spring wires are circumferentially staggered to form the hyperboloid structure;

The rear end of the termination rear sleeve is provided with a termination structure for connecting to a corresponding line.

2. The inside-less wire spring hole according to claim 1, wherein the notch at the front end of the retaining groove is formed in a flared structure for guiding the insertion of the wire spring into the retaining groove.

3. The interior tension spring hole of claim 2, wherein the front end of the termination back sleeve has a tapered section, and the notch of the retaining groove extends to the tapered section.

4. The interior threadless spring hole of claim 1, 2 or 3, wherein the termination rear sleeve, the wire spring wire and the front sheath are fixedly assembled by radial crimping.

5. The interior threadless spring hole of claim 4, wherein the portion of the wire spring wire inserted into the corresponding retaining groove is fixed by the front sheath in a radially crimping manner to achieve a radially crimping fixing assembly of the terminating rear sheath, the wire spring wire and the front sheath.

6. The inside-less wire spring hole according to claim 5, wherein the limiting groove is formed by milling, and a relief groove is formed on the terminating rear sleeve on the rear side of the limiting groove.

7. The inside threadless spring hole of claim 1, 2 or 3 wherein the rear end of the front sheath is engaged with the annular stop at the outer circumference of the rear end sleeve.

8. The assembling method of the spring hole without the inner sleeve wire is characterized by comprising the following steps of:

Firstly, a wire spring wire is fed into a front sheath by using a transition mandrel, and the front end of the wire spring wire is fixedly connected with the front end of the front sheath after the wire spring wire is fed in place;

Secondly, the transition mandrel is drawn out of the front sheath;

Thirdly, inserting and assembling the rear end connecting sleeve and the front sheath, and inserting the wire spring wires into the limiting grooves of the rear end connecting sleeve in a one-to-one correspondence manner, wherein a plurality of limiting grooves are distributed in the circumferential direction of the rear end connecting sleeve and extend along the front-back direction;

Fourthly, the wire spring wire is connected with a rear sleeve or a front sheath in a rotating mode around the axis of the wire spring wire, and the front end and the rear end of the wire spring wire are circumferentially staggered to form a hyperboloid structure;

And fifthly, fixedly assembling the end connection rear sleeve, the wire spring wire and the front sheath together.

9. The method for assembling a threadless spring hole of claim 8, wherein in step five, the rear end-connecting sleeve, the wire spring wire and the front sheath are fixedly assembled by means of radial compression joint.

10. The method for assembling a hole for a threadless spring according to claim 9, wherein in the first step, the front end of the threadless spring is fixedly connected to the front end of the front sheath by welding.

Technical Field

The invention relates to a spring hole without an inner sleeve wire and an assembling method thereof.

Background

The mating of the electrical connector contacts is the mating of the male and female contacts. The male contact, also known as a Pin (Pin), is typically a rigid part. The female contact, also called Socket, is generally a spring contact, and is also the key for mating. The elastic structure of the jack is elastically deformed to generate elastic force when being plugged with the rigid contact pin, the elastic force enables the elastic structure to be in close contact with the rigid contact pin to complete current and signal connection, and the contact piece of the electric connector is directly related to the quality of current and signal transmission.

Common jacks include wire spring holes (also called wire spring jacks), and one of the structures without inner wire spring holes is as follows: as shown in fig. 1, the inside-less wire spring hole includes a front sheath 21, a wire spring wire 22, a transition core 23, and a terminating rear sheath (not shown), and the front end of the front sheath 21 is bent inward to form a U-shaped groove 24. The length of transition dabber 23 matches with the axial length of preceding sheath 21 to, for the wire spring silk of conveniently sending in, it has along axially extended holding tank 25 to distribute at the outer peripheral face of transition dabber 23, and wire spring silk 22 sets up respectively in each holding tank 25 and stretches out the preceding terminal surface of transition dabber 23.

During assembly, the transition core 23 is inserted forward into the front cover 21, and the portion of the wire spring 22 extending out of the transition core 23 is inserted into the U-shaped groove 24, and the front end of the wire spring 22 is fixed to the front cover 21 by radially pressing the groove wall of the U-shaped groove or welding the front cover 21 to the front end of the wire spring 22. The transition mandrel 23 is then pulled back so that the front end of the transition mandrel 23 corresponds to the rear end of the front sheath 21. And (3) rotating the transition mandrel 23 to enable the wire spring wire 22 to form a hyperboloid three-dimensional structure, radially and inwards crimping the rear end part of the front sheath 21, and axially positioning the front sheath 21 and the transition mandrel 23 to complete the assembly of the non-inner-sleeve wire spring hole.

The position of the hyperboloid three-dimensional structure surrounded by the wire spring 22 with the smallest radial dimension is called a throat circle, the diameter of the throat circle is smaller than that of the inserting needle, when the inserting needle is inserted, the three-dimensional structure surrounded by the wire spring 22 is expanded by the inserting needle, and the wire spring 22 is tightly contacted with the inserting needle by means of the elastic force of the wire spring 22. The rear end of the transition mandrel 23 is connected with a rear sleeve, and the rear sleeve is used for connecting a corresponding line.

The inner sleeve-free wire spring hole does not need to be provided with an inner sleeve, so that the radial size of the inner sleeve-free wire spring hole is smaller. But the transition dabber exists to in order to guarantee to send into the front shroud with the wire spring silk smoothly, the length of transition dabber needs to set up longer to match front shroud length, leads to whole no interior wire spring hole's axial length longer, is unfavorable for the high-accuracy into formation development of product.

Disclosure of Invention

The invention aims to provide an inner sleeve-free wire spring hole, which is used for solving the problems that the existing inner sleeve-free wire spring hole is long in axial length and is not beneficial to high-precision and intensive product development.

In order to achieve the purpose, the technical scheme of the spring hole without the inner sleeve wire provided by the invention is as follows: a threadless inner wire spring hole comprising:

The front end of the front sheath is a plug-in end for inserting an adaptive contact pin;

The wire spring wire forms a hyperboloid structure and is used for being inserted and matched with the contact pin, and the front end of the wire spring wire is fixedly connected with the front end of the front sheath;

The front end of the rear end connecting sleeve is circumferentially distributed with a plurality of limiting grooves, and each limiting groove extends forwards and backwards;

The front end of the terminating rear sleeve is inserted and assembled in the front sheath, the wire spring wires are correspondingly positioned and inserted in the limiting grooves one by one, and when the terminating rear sleeve and the front sheath rotate relatively to set angles and are fixedly assembled together, the front end and the rear end of the wire spring wires are circumferentially staggered to form the hyperboloid structure;

The rear end of the termination rear sleeve is provided with a termination structure for connecting to a corresponding line.

The beneficial effects are that: the front end of the wire spring wire is fixed at the front end of the front sheath, the terminating rear sleeve is inserted into the front sheath, the wire spring wire enters the limiting groove of the terminating rear sleeve in a one-to-one correspondence mode in the inserting process, the terminating rear sleeve and the front sheath rotate relatively in the circumferential direction of the terminating rear sleeve by a set angle, the wire spring wire rotates along with the limiting groove to form a hyperboloid structure, then the front end of the terminating rear sleeve is fixedly connected with the rear end of the front sheath, the assembly of the wire spring hole without the inner sleeve is completed, and the rear end of the terminating rear sleeve is provided with a terminating structure used for being connected to a corresponding line. Compared with the non-inner-sleeve wire spring hole in the prior art, the non-inner-sleeve wire spring hole realizes the rotation of the wire spring wire by utilizing the end connection rear sleeve, does not need to be provided with a transition mandrel, directly fixes and assembles the front sheath and the end connection rear sleeve together, can relatively shorten the axial length of the whole wire spring hole, and is beneficial to the high-precision and intensive development of products.

As a further improvement, the notch at the front end of the limiting groove is of a flaring structure and is used for guiding the wire spring to be inserted into the limiting groove.

The wire spring hole limiting device has the beneficial effects that when the terminating rear sleeve is inserted into the front sleeve from back to front, a guide wire spring wire can conveniently enter the limiting groove, and the assembly of the wire spring hole is facilitated.

As a further improvement, the front end of the termination rear sleeve is provided with a conical section, and the notch of the limiting groove extends to the conical section.

The limiting groove has the beneficial effects that the processing is convenient, and the conical section can also guide the wire spring to enter the limiting groove.

As a further improvement, the terminating rear sleeve, the wire spring wire and the front sheath are fixedly assembled in a radial compression joint mode.

The method has the advantages of mature compression joint technology and convenience for simplifying the assembly process of the spring hole without the inner sleeve wire.

As a further improvement, the part of the wire spring wire inserted into the corresponding limiting groove is fixed by the front sheath in a radial compression joint mode, so that the fixed assembly of the termination rear sheath, the wire spring wire and the front sheath in the radial compression joint mode is realized.

The end connection rear sleeve has the beneficial effects that the existing limit groove is arranged on the end connection rear sleeve, the wire spring wire and the front sheath are fixedly assembled through radial compression joint, and the assembly is convenient.

As a further improvement, the limiting groove is formed by milling, and a tool withdrawal groove is formed in the rear side of the limiting groove on the end connection rear sleeve.

As a further improvement, the periphery of the end connection rear sleeve is provided with an annular stop step, and the rear end of the front sheath is in stop fit with the annular stop step.

The plug-in type plug-in connector has the advantages that the axial relative positions of the front sheath and the terminating rear sheath can be indicated, so that an operator can easily judge whether the terminating rear sheath and the front sheath are plugged in place.

In order to achieve the purpose, the technical scheme of the assembling method of the spring hole without the inner sleeve provided by the invention is as follows: the assembling method of the spring hole without the inner sleeve wire comprises the following steps:

Firstly, a wire spring wire is fed into a front sheath by using a transition mandrel, and the front end of the wire spring wire is fixedly connected with the front end of the front sheath after the wire spring wire is fed in place;

Secondly, the transition mandrel is drawn out of the front sheath;

Thirdly, inserting and assembling the rear end connecting sleeve and the front sheath, and inserting the wire spring wires into the limiting grooves of the rear end connecting sleeve in a one-to-one correspondence manner, wherein a plurality of limiting grooves are distributed in the circumferential direction of the rear end connecting sleeve and extend along the front-back direction;

Fourthly, the wire spring wire is connected with a rear sleeve or a front sheath in a rotating mode around the axis of the wire spring wire, and the front end and the rear end of the wire spring wire are circumferentially staggered to form a hyperboloid structure;

And fifthly, fixedly assembling the end connection rear sleeve, the wire spring wire and the front sheath together.

The beneficial effects are that: the invention relates to an assembly method of a wire spring hole without an inner sleeve, which is characterized in that after wire spring wires are sent to a corresponding position of a front sheath and the front ends of the wire spring wires are fixed, a transition mandrel is pulled out from the front sheath without using, a terminating rear sleeve is inserted into the front sheath, the wire spring wires are correspondingly inserted into a limiting groove of the terminating rear sleeve for limiting one by one, the terminating rear sleeve or the front sheath is rotated around an axis, and the corresponding ends of the wire spring wires rotate together with the corresponding terminating rear sleeve or the front sheath to form a hyperboloid structure; the end-connected back sleeve can be directly connected with a corresponding circuit, a transition mandrel is omitted, the axial length of the inner sleeve-free wire spring hole is shorter, and high-precision and intensive development of products is facilitated.

As a further improvement, in step five, the rear end connecting sleeve, the wire spring wire and the front sheath are fixedly assembled in a radial compression joint mode.

It has the advantages that: the radial compression joint is convenient to fix, and the assembly method of the spring hole without the inner sleeve wire can be effectively simplified.

As a further improvement, in the step one, the front end of the wire spring wire is fixedly connected with the front end of the front sheath in a welding mode.

It has the advantages that: the welding connection operation is convenient, and the reliability of the fixed connection is high.

Drawings

FIG. 1 is a schematic diagram of a spring hole without an inner wire spring in the prior art;

FIG. 2 is a schematic structural diagram of a spring hole without an inner wire according to embodiment 1 of the present invention;

FIG. 3 is a schematic view of the terminated boot of FIG. 2;

FIG. 4 is a left side view of FIG. 3;

In the figure: 21. the wire spring comprises a front sheath, 22, a wire spring wire, 23, a transition mandrel, 24, a U-shaped groove, 25, a containing groove, 1, a front sheath, 101, an annular U-shaped groove, 2, a wire spring wire, 3, a termination rear sleeve, 301, a front end part, 302, a rear end part, 303, a termination structure, 304, a limiting groove, 305, a tool withdrawal groove, 306, a conical section, 307 and a flaring structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

Specific example 1 of the inner housing-less wire spring hole of the present application:

As shown in fig. 2, the inside-less wire spring hole includes a front sheath 1, a wire spring wire 2, and a terminating rear sheath 3.

The whole front sheath 1 is of a sleeve structure, the front end of the front sheath 1 is an insertion end for inserting a contact pin in a matching mode, the front end of the front sheath 1 is turned inwards to form an annular U-shaped groove 101, the rear end of the front sheath 1 is connected with the rear sheath 3 to be inserted, and the wire spring wire is also fed into the transition mandrel.

As shown in fig. 3 and 4, the terminating rear sleeve 3 includes a front end portion 301 and a rear end portion 302, a limiting groove 304 extending in the front-rear direction is axially provided in the front end portion 301, the limiting groove 304 is formed by milling, and a relief groove 305 is communicated with the rear end of the limiting groove 304. The tool withdrawal groove 305 is located at the junction of the front end part 301 terminating the rear sleeve 3 and the rear end part 302 terminating the rear sleeve 3, the tool withdrawal groove 305 comprises a groove front wall, a groove rear wall and a groove bottom wall, the groove rear wall is formed by the front end of the rear end part 302, the radial dimension of the rear end part 302 terminating the rear sleeve 3 is larger than that of the front sleeve, namely the radial dimension of the rear groove wall of the tool withdrawal groove 305 along the rear sleeve 3 is larger than that of the front groove wall of the tool withdrawal groove 305 along the rear sleeve 3, and the front end part 301 terminating the rear sleeve 3 and the rear end part 302 form an annular stop step.

The front end of the front end part 301 of the end-connecting rear sleeve 3 is provided with a conical section 306, and the limiting groove 304 extends to the conical section 306. The front end of the retaining groove 304 forms a flared structure 307 and cooperates with the tapered section 306 to guide the wire spring 2 into the retaining groove 304 during insertion of the wire spring 2 into the retaining groove 304.

The rear end portion 302 of the termination back jacket 3 is provided with a termination structure 303, the termination structure 303 being intended for connection into a corresponding line. The termination structure 303 can be configured as a printed board, a wiring board, a solder cup, a fish eye structure, etc. according to actual use requirements.

In this embodiment, the wire spring wires 2 have six wires, are made of a conductive material and have certain hardness, and the wire spring wires can be wire spring wires in the prior art, so that the strength and the conductivity of the wire spring wires need to be paid attention to, and the signal transmission requirement when the wire spring wires are inserted into the adaptive contact pins is met.

In this embodiment, the leading end of the wire spring wire 2 is inserted into the annular U-shaped groove 101 at the leading end of the front cover 1 and fixed in the annular U-shaped groove 101 by radial crimping.

In fact, after the wire spring 2 is fed into the front sheath 1, the transition mandrel is drawn out, and then the terminating rear sleeve 3 is fed into the front sheath 1, at this time, the wire spring 2 is inserted into the limiting groove 304 in a one-to-one correspondence manner, the terminating rear sleeve 3 is rotated around the central axis of the wire spring to a set angle, so that the front end and the rear end of the wire spring are circumferentially staggered to form a hyperboloid structure, the radial dimension of the minimum radial dimension position of the hyperboloid structure is smaller than that of the corresponding contact pin, and the wire spring 2 is reliably matched with the contact pin in an inserting manner by means of the elastic force of the wire spring 2.

Then the front sheath 1 is radially pressed and connected, the wire spring wire 2 is pressed and fixed in the limiting groove 304, the wire spring wire 2, the front sheath 1 and the terminating rear sheath 3 are fixedly connected, and meanwhile, the wire spring wire 2 is ensured to be reliably electrically contacted with the terminating rear sheath 3.

It should be noted that, in this embodiment, the transition mandrel in the prior art may be used, and only after the wire spring wire is fed into the front sheath, the transition mandrel needs to be extracted from the front sheath.

In the no endotheca wire spring hole that this embodiment provided, because set up the spacing groove on terminating the back cover, can fix a position the wire spring like this, conveniently rotate terminating the back cover, and then make the wire spring form three-dimensional hyperboloid structure, because terminating the back cover need not send the wire spring into preceding sheath, terminating the back cover just can the design shorter, need not match the length of preceding sheath, and then can effectively reduce the axial length in whole no endotheca wire spring hole.

In addition, it should be noted that, when the rotation operation is performed, the front sheath may be fixed and the rotation end may be connected to the rear sheath, and of course, the front sheath may be fixed and the rear sheath may be connected to the rotation end, and the rotation of the front sheath may be performed by rotating the front sheath and the rear sheath by a set angle relative to each other to form a three-dimensional hyperboloid structure.

Specific example 2 of the inner housing-less wire spring hole of the present application:

This example differs from example 1 in that: the front end of the limiting groove is not provided with a flaring structure, and the spring wire enters the limiting groove mainly by means of a conical section guide wire.

Specific example 3 of the inner housing-less wire spring hole of the present application:

This example differs from example 1 in that: the front end of the end connection rear sleeve is not provided with a conical section, and the flaring range of the flaring structure is larger so as to facilitate the insertion of the wire spring.

Specific example 4 of the inner housing-less wire spring hole of the present application:

This example differs from example 1 in that: the rear end joint sleeve and the front sheath are welded and fixed, resistance welding or laser welding can be selected according to equipment conditions, and the wire spring wire is positioned through the hole wall of the limiting hole.

Specific example 5 of the inner housing-less wire spring hole of the present application:

This example differs from example 1 in that: in embodiment 1, the front end of the wire spring is formed by an annular U-shaped groove 101 at the front end of the front sheath, and the front end of the wire spring is fixed by radial compression. In the embodiment, the front end of the wire spring is welded and fixed on the inner wall of the front sheath, and then an inward annular flange is designed at the front end of the front sheath and used for protecting the wire spring. During specific manufacturing, the annular flanging can be manufactured after welding is finished, so that welding and fixing are convenient.

Specific example 6 of the inner housing-less wire spring hole of the present application:

This example differs from example 1 in that: the periphery of the terminating rear sleeve is not provided with an annular stop step but is provided with an indicating line, and the front sheath and the terminating rear sleeve are indicated to be inserted in place through the indicating line, so that the qualification rate of the wire spring hole without the inner sleeve is ensured.

Specific example 7 of the inner housing-less wire spring hole of the present application:

This example differs from example 1 in that: in example 1, the wire spring wire is fixed in the position-limiting groove of the terminating rear sleeve by the front sleeve in a crimping fixing manner. In this embodiment, after the wire spring and the limiting hole are inserted in place, the rear end of the wire spring is welded in the limiting groove, and then the connection rear sleeve or the front sheath is rotated spirally around the axis of the connection rear sleeve or the front sheath to make the wire spring enclose a hyperbolic structure, and then the connection rear sleeve and the front sheath are welded and fixed.

In addition, it should be noted that the welding is performed first and then the rotation is performed, so that the welding point of the wire spring and the rear end connection sleeve is positioned outside the front sheath before the wire spring and the rear end connection sleeve are not rotated, the welding is performed conveniently, the welding joint of the wire spring and the rear end connection sleeve enters the front sheath after the wire spring and the rear end connection sleeve are rotated, and when the front sheath and the rear end connection sleeve are welded and connected, the interference to the welding point of the wire spring can be reduced.

Specific embodiment 1 of the assembling method of a spring hole without an inner case wire of the present application:

Firstly, a wire spring wire 2 is fed into a front sheath 1 by using a transition mandrel, and the front end of the wire spring wire 2 is fixedly connected with the front end of the front sheath 1 by adopting a welding mode after the wire spring wire 2 is fed in place;

Secondly, the transition mandrel is drawn out of the front sheath 1;

Thirdly, the rear end connecting sleeve 3 and the front sheath 1 are spliced and assembled, and the wire spring wires 2 are correspondingly inserted into the limiting grooves 304 of the rear end connecting sleeve 3 one by one;

Fourthly, the wire spring wire 2 is connected with the rear sleeve 3 or the front sheath 1 by a set angle in a rotating way around the axis of the wire spring wire to ensure that the front end and the rear end of the wire spring wire 2 are circumferentially staggered to form a hyperboloid structure;

And fifthly, the end connection rear sleeve 3, the wire spring wire 2 and the front sheath 1 are fixedly assembled in a radial compression joint mode.

In the assembly method provided by this embodiment, the wire spring wire is still fed into the front sheath by using the transition mandrel, the operation is convenient, then the end-connection rear sheath or the front sheath is used to drive the wire spring wire to a set angle, so as to form a three-dimensional hyperboloid structure, and then the front sheath, the wire spring wire and the end-connection rear sheath are fixedly assembled together, so as to obtain the interior-less wire spring hole as shown in fig. 1.

Specific embodiment 2 of the assembling method of a spring hole without an inner case wire of the present application:

Firstly, a wire spring wire is fed into a front sheath by using a transition mandrel, and the front end of the wire spring wire is fixedly connected with the front end of the front sheath in a welding mode after the wire spring wire is fed in place;

Secondly, the transition mandrel is drawn out of the front sheath;

Thirdly, inserting and assembling the rear end connecting sleeve and the front sheath, and inserting the wire spring wires into the limiting grooves of the rear end connecting sleeve in a one-to-one correspondence manner;

Rotating the end around the axis of the wire spring to connect with a rear sleeve or a front sheath by a set angle, so that the front end and the rear end of the wire spring are circumferentially staggered to form a hyperboloid structure;

And fifthly, the end is fixedly connected with the rear sleeve, the wire spring wire and the front sheath in a welding mode.

The present embodiment is different from embodiment 1 mainly in that: and step five, connecting the end of the rear sleeve, the wire spring wire and the front sheath in a fixing mode.

Specific embodiment 3 of the assembling method of a spring hole without an inner case wire of the present application:

Firstly, a wire spring wire is fed into a front sheath by using a transition mandrel, and the front end of the wire spring wire is fixedly connected with the front end of the front sheath in a welding mode after the wire spring wire is fed in place;

Secondly, the transition mandrel is drawn out of the front sheath;

Thirdly, splicing and assembling the rear end connecting sleeve and the front sheath, inserting the wire spring wires into the limiting grooves of the rear end connecting sleeve in a one-to-one correspondence manner, and welding the wire spring wires in the limiting grooves;

Rotating the end around the axis of the wire spring to connect with a rear sleeve or a front sheath by a set angle, so that the front end and the rear end of the wire spring are circumferentially staggered to form a hyperboloid structure;

And fifthly, the end connection rear sleeve is fixedly connected with the front sheath in a welding mode.

The present embodiment is different from embodiment 1 mainly in that: after the wire spring wires are inserted into the limiting grooves of the end connection rear sleeve one by one, the wire spring wires are welded and fixed in the limiting grooves, the end connection rear sleeve or the end connection front sleeve is rotated to form a double-curved-surface structure, and finally the front sleeve and the end connection rear sleeve are welded and fixed, so that the interference of the rear end of the wire spring wires to the front sleeve is reduced by adopting a staged fixing mode.

Specific embodiment 4 of the assembling method of a spring hole without an inner case wire of the present application:

The front end of the front sheath is provided with an annular U-shaped groove, and the inner and outer groove walls of the annular U-shaped groove clamp the wire spring in a manner of radially and inwardly pressing the annular U-shaped groove so as to fixedly connect the front end of the wire spring with the front end of the front sheath;

Secondly, the transition mandrel is drawn out of the front sheath;

Thirdly, the rear end connecting sleeve and the front sheath are spliced and assembled, and the wire spring wires are correspondingly inserted into the limiting grooves of the rear end connecting sleeve 3 one by one;

Rotating the end around the axis of the wire spring to connect with a rear sleeve or a front sheath by a set angle, so that the front end and the rear end of the wire spring are circumferentially staggered to form a hyperboloid structure;

And fifthly, the end is connected with the rear sleeve, the wire spring wire and the front sheath and is fixedly assembled in a radial compression joint mode.

In the embodiment, the front end of the front sheath and the front end of the wire spring wire are fixed in a compression joint mode, the operation is convenient, and a welding process is not required to be introduced.

In view of the above, in embodiments 1, 2, 3, and 4 of the method for assembling a hole for a spring without an inner case, the method for assembling a spring hole without an inner case has the following advantageous effects: after the wire spring wires are sent to the corresponding position of the front sheath through the transition mandrel and the front ends of the wire spring wires are fixed, the transition mandrel is pulled out from the front sheath without using the transition mandrel, the end-connected rear sleeve is inserted into the front sheath, the wire spring wires are correspondingly inserted into the limit grooves of the end-connected rear sleeve one by one to limit, the end-connected rear sleeve or the front sheath is rotated around the axis, and the corresponding ends of the wire spring wires rotate together with the corresponding end-connected rear sleeve or the front sheath to form a hyperboloid structure; the end-connected back sleeve can be directly connected with a corresponding circuit, a transition mandrel is omitted, the axial length of the inner sleeve-free wire spring hole is shorter, and high-precision and intensive development of products is facilitated.

Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.