WO2022227874A1

WO2022227874A1 - Fusion welding column having self-contained positioning buckle and connection structure

Info

Publication number: WO2022227874A1
Application number: PCT/CN2022/079967
Authority: WO
Inventors: 田由平; 胡学川; 赵义祥; 周建军; 马力
Original assignee: 重庆平伟汽车零部件有限公司
Priority date: 2021-04-27
Filing date: 2022-03-09
Publication date: 2022-11-03
Also published as: CN113059812A

Abstract

Disclosed are a fusion welding column which has a self-contained positioning buckle and a connection structure. The fusion welding column comprises a base. A welding column body is disposed on the base. One end of the welding column body is connected to the base, and the other end extends back to the base so as to form an insertion end. An inverted buckle is provided on a sidewall of the welding column body. Also disclosed is a fusion welding column which has a self-contained positioning buckle and connection structure which has a receptacle part. The beneficial effects of the present invention: by means of providing an inverted buckle structure, the welding column body is prevented from disengaging after being inserted into a receptacle, which is beneficial for positioning and pre-assembling two parts. The structure is simple and the assembly efficiency is high, which are beneficial for the subsequent permanent connection, i.e. fusion welding.

Description

A welding column with its own positioning buckle and its connection structure

technical field

The invention belongs to the technical field of welding and connection of plastic parts, and particularly relates to a welding column and a connection structure with its own positioning buckle.

Background technique

The interior and exterior parts of automobiles are assembled from multiple parts, and the connection methods between parts generally include welding, snaps, screws or bolts. For example, most of the interior and exterior trim parts are plastic parts, and the connection between the plastic parts widely uses the structure of the fusion welding column and the socket. After the socket is matched, the welding column is melted to connect the two parts. In order to facilitate the installation and connection between components, before facing the connection, it is generally necessary to pre-install the components so that the components are relatively fixed, and then perform welding/screwing operations, so as to ensure accurate positioning and improve assembly quality. and efficiency. In order to achieve this purpose, the pre-installed buckle structure is usually designed separately, and the positioning and pre-connection between components are realized by relying on the pre-installed buckle structure, but this design will lead to increased space for components and more complex molds. The cost of the mold is increased, and there are more structural features that need to be aligned during assembly, so the installation is complicated.

SUMMARY OF THE INVENTION

In view of this, one of the objectives of the present invention is to provide a welding post with its own positioning buckle.

Its technical solutions are as follows:

A welding post with its own positioning buckle, including a base, a welding post body is arranged on the base, one end of the welding post body is connected with the base, and the other end protrudes away from the base to The key to forming the plug-in terminal is that the side wall of the welding post body is provided with an undercut.

The above design has the advantage of preventing the welding column body from coming out after being inserted into the socket by setting the inverted buckle structure, which is conducive to the realization of positioning and pre-assembly between the two parts. The structure is simple and the assembly efficiency is high. Connecting is soldering for convenience.

As a preferred technical solution, the side wall of the welding column body is partially extended radially outward to form the undercut, and the height of the undercut protruding from the side wall of the welding column body is from the undercut to the insertion end gradually decreased.

With the above design, the advantage is that it is convenient for the welding post body to enter the socket.

As a preferred technical solution, at least two positioning ribs are arranged on the side wall of the welding column body, all the positioning ribs are evenly distributed circumferentially around the side wall of the welding column body, and the positioning ribs are along the welding column. the axial extension of the body;

A support table is also arranged on the side wall of the welding column body, the direction of the support table is consistent with the direction of the plug-in end, and the support table is located between the undercut and the base.

With the above design, the advantage is that the positioning rib is used as the abutment structure between the welding column body and the socket wall, and the point-surface fit replaces the surface-to-surface cooperation between the outer wall of the welding column body and the socket wall, which is convenient to realize the welding column. The radial positioning of the body in the socket; the support table and the undercut realize the axial positioning of the welding column body and the socket from two directions, and the support table can also improve the connection stability between the welding column and the welding seat .

As a preferred technical solution, there are four positioning ribs, and the middle part of one of the positioning ribs extends radially outward along the welding column body to form the undercut.

As a preferred technical solution, when the end portion of the positioning rib close to the plug end extends toward the plug end, the protruding height thereof is gradually reduced, thereby forming a plug guide portion.

As a preferred technical solution, a supporting rib is connected between the positioning rib and the base, the supporting rib and the corresponding positioning rib are located in the same plane, and the end face of the supporting rib facing the plug end forms the A support table, the table surface of the support table is perpendicular to the column center line of the welding column body.

As a preferred technical solution, an impact hole is partially penetrated through the base facing the above-mentioned upside-down buckle.

The above design has the advantage of facilitating demolding after injection molding of the fusion welding column and simplifying the mold.

Another object of the present invention is to provide a connection structure having the above-mentioned welding column. Its technical solution is as follows:

A connection structure includes the fusion welding column described in any one of the above, and the key point is that it also includes a welding seat, and the welding seat is provided with an insertion hole;

The welding post body is inserted into the insertion hole, and the positioning rib abuts against the hole wall of the insertion hole;

The inverted buckle and the support stand are respectively abutted against the welding seat from both ends of the insertion hole.

As a preferred technical solution, the hole wall of the above-mentioned socket is provided with a vacant notch corresponding to the inverted buckle, and the vacated notch extends toward the inverted buckle near the edge of the plug-in end to form a clamping platform, and the inverted buckle sticks Rely on the card to connect the platform;

In the circumferential direction of the insertion hole, there are gaps between the two ends of the clamping platform and the two ends of the edge of the escaping notch respectively.

As a preferred technical solution, a guide chamfer is provided at the edge of the above-mentioned escaping notch close to the base.

Compared with the prior art, the beneficial effects of the present invention are as follows: by setting the inverted buckle structure, the welding post body is prevented from coming out after being inserted into the socket, which is beneficial to realize the positioning and pre-assembly between the two parts, the structure is simple, and the assembly is simple. High efficiency and convenience for subsequent permanent connection, namely welding.

Description of drawings

Fig. 1 is the structural schematic diagram of the first angle of view of the fusion welding column;

Fig. 2 is the structural schematic diagram of the second angle of view of the fusion welding column;

Fig. 3 is the first schematic diagram of the connection structure;

Fig. 4 is the second schematic diagram of the connection structure;

Fig. 5 is A-A sectional view in Fig. 4;

Fig. 6 is the schematic diagram of the first angle of view of the welding seat;

FIG. 7 is a schematic diagram of a second viewing angle of the welding seat.

Detailed ways

The present invention will be further described below with reference to the embodiments and the accompanying drawings.

As shown in FIGS. 1 and 2 , a welding column with its own positioning buckle includes a base 110 , a welding column body 120 is arranged on the base 110 , and one end of the welding column body 120 is connected to the base 110 For connection, the other end protrudes away from the base 110 to form a plug-in end, and an undercut 130 is provided on the side wall of the solder post body 120 . A positioning rib 140 is provided on the side wall of the welding column body 120 , and the positioning rib 140 extends along the axial direction of the welding column body 120 . The side wall of the welding column body 120 is further provided with a support table, the direction of the support table is the same as the direction of the plug-in end, and the support table is located between the undercut 130 and the base 110 .

In this embodiment, there are at least three positioning ribs 140 , and all the positioning ribs 140 are evenly distributed circumferentially around the sidewall of the welding column body 120 . In this embodiment, there are four positioning ribs 140 , and the middle portion of one positioning rib 140 extends radially outward along the welding column body 120 to form the undercut 130 . The height of the undercut 130 protruding from the side wall of the welding post body 120 gradually decreases from the undercut 130 to the plug end, and the end of the positioning rib 140 close to the plug end extends toward the plug end while it protrudes The height gradually decreases, thereby forming the plug guide portion 141 . The purpose of this design is to facilitate the entry of the solder post body 120 into the corresponding assembly hole.

Except for the positioning ribs 140 where the undercuts 130 are located, the other three positioning ribs 140 are respectively connected with support ribs 150 between the base 110 , and the support ribs 150 and the corresponding positioning ribs 140 are located in the same plane. The end faces of the three support ribs 150 facing the plug end are located in the same plane perpendicular to the column center line of the welding column body 120 , and the plane forms a support table.

The welding post body 120 is a hollow cylindrical shape, and its plug-in end is open. The base 110 facing the undercut 130 is partially penetrated with an impact hole 111 , and the area of the impact hole 111 is larger than the area of the undercut 130 , so that the welding column body 120 can be directly followed in the axial direction of the welding column body 120 during injection molding of the welding column. Two-way demoulding, directly integrally forming the inverted buckle 130 and the welding column, makes the mold structure simpler.

In this embodiment, the base 110 includes a base plate, and the middle portion of the base plate protrudes toward one side of the base plate to form a reinforcing protrusion, so as to improve the strength and rigidity of the base 110 . The welding post body 120 is integrally formed on the reinforcing protrusion. The entire part can be integrally molded by injection molding.

The applicable connection structure of the welding column with its own positioning buckle is as follows:

As shown in FIGS. 3 to 5 , a connection structure includes the welding column as described above, and also includes a welding seat 210 , and an insertion hole 220 is opened on the welding seat 210 . The welding post body 120 is inserted into the insertion hole 220 , and the positioning ribs 140 abut against the hole wall of the insertion hole 220 , thereby positioning the welding post body 120 . The inverted buckle 130 and the support stand abut against the welding seat 210 from both ends of the insertion hole 220 respectively.

In this embodiment, the area of the welding seat 210 corresponding to the support rib 150 is flat, so the support rib 150 abutting the welding seat 210 can also enhance the connection stability during permanent connection. The edge of the welding seat 210 is also provided with a reinforced flange to improve the strength and rigidity of the welding seat 210 .

As shown in FIGS. 3 , 5 and 6 , the hole wall of the insertion hole 220 is provided with a vacant notch corresponding to the inverted buckle 130 , and the vacated notch extends toward the inverted buckle 130 near the edge of the plug-in end to form a The clamping platform 230 is attached to the clamping platform 230 .

As shown in FIGS. 5 and 7 , a guide chamfer 240 is provided near the edge of the base 110 of the escape notch, so that the welding column body 120 can enter the insertion hole 220 easily; at the same time, due to the existence of the guide chamfer 240, the base 110 is partially thinned corresponding to the vacant gap, so that the clamping platform 230 has a certain elasticity. In the circumferential direction of the insertion hole 220 , there are gaps between the two ends of the clamping platform 230 and the two ends of the edge of the escaping notch, which further increases the elasticity of the clamping platform 230 . During installation, it is convenient for the welding post body 120 to enter the insertion hole 220 and for the undercut 130 to pass through the insertion hole 220 .

The design interference between the inverted buckle 130 and the clamping platform 230 is 0.1 mm. Not only can the snap connection be realized, but at the same time, it is convenient for the inverted buckle 130 to pass through the socket 220 . The length of the entire fusion welding column protruding from the welding seat 210 is 8-10 mm, which is just right after the welding is melted and satisfies the assembly strength.

During assembly, after the welding column is inserted into the socket 220, several positioning ribs 140 abut against the hole wall of the socket 220 respectively, so as to realize the radial positioning of the welding column body 120 relative to the socket 220; One end is abutted against the welding seat 210 to support the welding seat 210 and act as an axial limiter, while the undercut 130 abuts the welding seat 210 from the other end of the socket 220 and also plays an axial role for the welding seat 210 The limiting function makes the welding column and the welding seat 210 fixed in position. The pre-assembled connection structure is simple, the installation is convenient, and the pre-assembled positioning is effectively realized. After the plug end of the welding post body 120 is subsequently melted, the two are welded and connected.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those of ordinary skill in the art can make a variety of similar It is indicated that such transformations fall within the protection scope of the present invention.

Claims

A welding post with a positioning buckle, comprising a base (110), a welding post body (120) is arranged on the base (110), and one end of the welding post body (120) is connected to the base (110). 110) connection, and the other end protrudes away from the base (110) to form a plug-in end, characterized in that an undercut (130) is provided on the side wall of the welding post body (120).
The welding column with its own positioning buckle according to claim 1, characterized in that: the side wall of the welding column body (120) partially extends radially outward to form the undercut (130) , the height of the undercut (130) protruding from the side wall of the welding post body (120) gradually decreases from the undercut (130) to the plug end.
The fusion welding column with its own positioning buckle according to claim 1 or 2, characterized in that: at least two positioning ribs (140) are provided on the side wall of the welding column body (120), all of which are The positioning ribs (140) are evenly distributed circumferentially around the side wall of the welding column body (120), and the positioning ribs (140) extend along the axial direction of the welding column body (120);

A support table is also provided on the side wall of the welding column body (120), the direction of the support table is consistent with the direction of the plug-in end, and the support table is located between the inverted buckle (130) and the base (110). )between.
The welding column with its own positioning buckle according to claim 3, characterized in that: there are at least four positioning ribs (140), and a middle part of one of the positioning ribs (140) is along the welding column The body (120) extends radially outward to form the undercut (130).
The welding column with its own positioning buckle according to claim 3, characterized in that: the end of the positioning rib (140) close to the plug-in end extends toward the plug-in end and at the same time it protrudes The height gradually decreases to form a plug guide (141).
The welding column with its own positioning buckle according to claim 3, characterized in that: a support rib (150) is connected between the positioning rib (140) and the base (110), and the The supporting rib (150) and the corresponding positioning rib (140) are located in the same plane, the end surface of the supporting rib (150) facing the plug end forms the supporting table, and the table surface of the supporting table is connected to the welding The column center line of the column body (120) is vertical.
The welding column with its own positioning buckle according to claim 1 or 2, characterized in that: the base (110) facing the inverted buckle (130) is partially penetrated with a perforation hole (111) .
A connection structure, comprising the welding column according to any one of claims 3 to 6, characterized in that it further comprises a welding seat (210), and an insertion hole (220) is opened on the welding seat (210);

The welding post body (120) is inserted into the insertion hole (220), and the positioning rib (140) abuts against the hole wall of the insertion hole (220);

The inverted buckle (130) and the support stand are respectively abutted against the welding seat (210) from both ends of the insertion hole (220).
The connection structure according to claim 8, wherein the hole wall of the insertion hole (220) is provided with a vacant notch corresponding to the inverted buckle (130), and the vacant notch is close to the edge of the plug-in end toward the side. the undercut (130) extends to form a snap-on platform (230), and the undercut (130) abuts against the snap-on platform (230);

In the circumferential direction of the insertion hole (220), there are gaps between the two ends of the clamping platform (230) and the two ends of the edge of the accommodating gap respectively.
The connection structure according to claim 9, characterized in that: a guide chamfer (240) is provided at the edge of the escaping gap close to the base (110).