A fusion welding column and connection structure with self-positioning buckle

Abstract

The present invention discloses a fusion welding column with a self-contained positioning buckle and a connection structure, wherein the fusion welding column comprises a base, a welding column body is arranged on the base, one end of the welding column body is connected to the base, and the other end extends away from the base to form a plug-in end, and an undercut is arranged on the side wall of the welding column body. Also disclosed is a connection structure between the fusion welding column with a self-contained positioning buckle and a part with a socket. The beneficial effects of the present invention are as follows: by providing an undercut structure, the welding column body is prevented from falling out after being inserted into the socket, which is conducive to the positioning and pre-assembly between the two parts, has a simple structure, high assembly efficiency, and provides convenience for subsequent permanent connection, i.e. welding.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic parts welding connection, and in particular relates to a fusion welding column with a positioning buckle and a connection structure. Background Art

[0002] Automobile interior and exterior parts are assembled from multiple parts, and the connection methods between parts are generally welding, snaps, screws or bolts. For example, most interior and exterior parts are plastic parts, and the connection between plastic parts widely uses a structure in which a fusion welding column and a socket are matched. After the socket is matched, the fusion welding column is melted to connect the two parts. In order to facilitate the installation and connection between parts, before the connection, it is generally necessary to pre-install the parts so that the parts are relatively fixed, and then perform welding / screwing operations. This can ensure accurate positioning and improve assembly quality and efficiency. To achieve this goal, a pre-installed snap-in structure is usually designed separately, and the pre-installed snap-in structure is relied on to achieve positioning and pre-connection between parts. However, this design will increase the space occupied by parts, make the mold more complicated, increase mold costs, and require more structural features to match during assembly, so the installation is complicated. Summary of the invention

[0003] In view of this, one of the objectives of the present invention is to provide a fusion welding column with a self-contained positioning buckle.

[0004] The technical solution is as follows:

[0005] A fusion welding column with a built-in positioning buckle includes a base, on which a welding column body is arranged. One end of the welding column body is connected to the base, and the other end extends away from the base to form a plug-in end. The key is that an undercut is arranged on the side wall of the welding column body.

[0006] The advantage of adopting the above design is that by setting the undercut structure, the welding column body is prevented from falling out after being inserted into the socket, which is conducive to the positioning and pre-assembly between the two parts. The structure is simple and the assembly efficiency is high, which provides convenience for subsequent permanent connection, i.e. welding.

[0007] As a preferred technical solution, the side wall of the solder column body partially extends radially outward to form the undercut, and the height of the undercut protruding from the side wall of the solder column body gradually decreases from the undercut to the plug-in end.

[0008] The advantage of adopting the above design is that it is easy for the welding column body to enter the socket.

[0009] As a preferred technical solution, at least two positioning ribs are arranged on the side wall of the welding column body, all of the positioning ribs are evenly distributed around the side wall of the welding column body, and the positioning ribs extend along the axial direction of the welding column body;

[0010] A support platform is also provided on the side wall of the welding column body. The orientation of the support platform is consistent with the orientation of the plug-in end. The support platform is located between the undercut and the base.

[0011] The advantage of adopting the above design is that the positioning rib serves as a supporting structure between the welding column body and the wall of the socket, and the point-to-surface coordination replaces the surface-to-surface coordination between the outer wall of the welding column body and the wall of the socket, so as to facilitate the radial positioning of the welding column body in the socket; the support platform and the undercut respectively realize the axial positioning of the welding column body and the socket from two directions, and the support platform can also improve the connection stability between the fusion welding column and the welding seat.

[0012] As a preferred technical solution, there are four positioning ribs, and the middle portion of one of the positioning ribs extends radially outward along the welding column body to form the undercut.

[0013] As a preferred technical solution, the end of the positioning rib close to the plug-in end extends toward the plug-in end while its protruding height gradually decreases, thereby forming a plug-in guide portion.

[0014] As an optimal 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, the end face of the supporting rib facing the plug-in end forms the supporting platform, and the surface of the supporting platform is perpendicular to the column centerline of the welding column body.

[0015] As a preferred technical solution, a portion of the base opposite to the above-mentioned inverted buckle is penetrated by a penetration hole.

[0016] The above design has the advantage of facilitating demoulding of the molten welding column after injection molding and simplifying the mold.

[0017] The second object of the present invention is to provide a connection structure having the above-mentioned fusion welding column. The technical solution is as follows:

[0018] A connection structure, comprising the fusion welding column as described in any one of the above, the key point of which is that it also comprises a welding seat, and the welding seat is provided with a plug hole;

[0019] The welding column body is inserted into the insertion hole, and the positioning rib abuts against the hole wall of the insertion hole;

[0020] The undercut and the support platform are respectively abutted against the welding seat from two ends of the insertion hole.

[0021] As a preferred technical solution, a clearance gap is provided on the hole wall of the above-mentioned plug hole corresponding to the undercut, and the clearance gap extends toward the undercut near the edge of the plug-in end to form a clamping platform, and the undercut is attached to the clamping platform;

[0022] 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 clearance gap.

[0023] As a preferred technical solution, the edge of the above-mentioned clearance gap close to the base is provided with a guide chamfer.

[0024] Compared with the prior art, the present invention has the following beneficial effects: by setting an undercut structure, the welding column body is prevented from falling out after being inserted into the socket, which is conducive to the positioning and pre-assembly between the two parts, has a simple structure and high assembly efficiency, and provides convenience for subsequent permanent connection, i.e. welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the fusion welding column from the first perspective;

[0026] Figure 2 A schematic diagram of the structure of the fusion welding column from a second viewing angle;

[0027] Figure 3 is the first schematic diagram of the connection structure;

[0028] Figure 4 is the second schematic diagram of the connection structure;

[0029] Figure 5 for Figure 4 Middle AA section;

[0030] Figure 6 A schematic diagram of a welding base from a first viewing angle;

[0031] Figure 7 This is a schematic diagram of the second viewing angle of the welding base. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with embodiments and drawings.

[0033] like Figure 1 and 2 As shown, a fusion welding column with a self-positioning buckle includes a base 110, on which a welding column body 120 is arranged, one end of the welding column body 120 is connected to the base 110, and the other end extends away from the base 110 to form a plug-in end, and an undercut 130 is arranged on the side wall of the welding column body 120. A positioning rib 140 is arranged 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. A support platform is also arranged on the side wall of the welding column body 120, and the direction of the support platform is consistent with the direction of the plug-in end, and the support platform is located between the undercut 130 and the base 110.

[0034] In this embodiment, there are at least three positioning ribs 140, and all the positioning ribs 140 are evenly distributed around the side wall of the welding column body 120. In this embodiment, there are four positioning ribs 140, and the middle part of one of the positioning ribs 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 column body 120 gradually decreases from the undercut 130 to the plug-in end, and the protruding height of the positioning rib 140 near the plug-in end gradually decreases while extending toward the plug-in end, thereby forming a plug-in guide 141. The purpose of this design is to facilitate the welding column body 120 to enter the corresponding assembly socket.

[0035] Except for the positioning rib 140 where the undercut 130 is located, the other three positioning ribs 140 are respectively connected to the base 110 by support ribs 150, and the support ribs 150 are located in the same plane as the corresponding positioning ribs 140. The end surfaces of the three support ribs 150 facing the plug-in 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 platform.

[0036] The welding column body 120 is a hollow cylinder with an open plug end. The base 110 facing the undercut 130 is partially penetrated with a penetration hole 111, and the area of ​​the penetration hole 111 is larger than the area of ​​the undercut 130. In this way, when the welding column is injection molded, the welding column body 120 can be directly demolded in two directions along the axial direction, and the undercut 130 and the welding column can be directly integrated, making the mold structure simpler.

[0037] In this embodiment, the base 110 includes a base plate, the middle of which is raised toward one side to form a reinforcing protrusion to improve the strength and rigidity of the base 110. The welding column body 120 is integrally formed on the reinforcing protrusion. The entire part can be integrally formed by injection molding.

[0038] The connection structure applicable to the above-mentioned fusion welding column with self-contained positioning buckle is as follows:

[0039] like Figures 3 to 5 As shown, a connection structure includes the above-mentioned fusion welding column and a welding seat 210, and a plug hole 220 is opened on the welding seat 210. The welding column body 120 is inserted into the plug hole 220, and the positioning rib 140 abuts against the hole wall of the plug hole 220, so as to position the welding column body 120. The undercut 130 and the support platform are respectively abutted against the welding seat 210 from both ends of the plug hole 220.

[0040] In this embodiment, the area of ​​the welding seat 210 corresponding to the support rib 150 is flat, so the support rib 150 can also enhance the connection stability when the welding seat 210 is pressed against the welding seat 210. The edge of the welding seat 210 is also provided with a reinforcing flange to improve the strength and rigidity of the welding seat 210.

[0041] like Figure 3 , 5 As shown in FIG. 6 , a clearance gap is formed in the hole wall of the insertion hole 220 corresponding to the undercut 130 , and the clearance gap extends toward the undercut 130 near the edge of the plug-in end to form a clamping platform 230 , and the undercut 130 is abutted against the clamping platform 230 .

[0042] like Figure 5 and 7 As shown, the edge of the clearance gap near the base 110 is provided with a guide chamfer 240, which facilitates the welding column body 120 to enter the insertion hole 220; at the same time, due to the existence of the guide chamfer 240, the base 110 is locally thinned at the corresponding clearance 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 clearance gap, which further increases the elasticity of the clamping platform 230. During installation, it is convenient for the welding column body 120 to enter the insertion hole 220, and it is convenient for the undercut 130 to pass through the insertion hole 220.

[0043] The undercut 130 and the clamping platform 230 are designed to interfere with each other by 0.1 mm, which can realize the clamping connection and facilitate the undercut 130 to pass through the insertion hole 220. The length of the entire welding column extending out of the welding seat 210 is 8-10 mm, which is just right after the welding is melted to meet the assembly strength.

[0044] During assembly, after the molten welding column is inserted into the socket 220, several positioning ribs 140 respectively abut against the hole wall of the socket 220 to achieve radial positioning of the welding column body 120 relative to the socket 220; the support platform abuts against the welding seat 210 from one end of the socket 220, supporting and limiting the welding seat 210, and the undercut 130 abuts against the welding seat 210 from the other end of the socket 220, also limiting the welding seat 210 in the axial direction, so that the molten welding column and the welding seat 210 are fixed in position. The pre-assembled connection structure is simple, easy to install, and effectively realizes pre-installation positioning. After the plug-in end of the welding column body 120 is melted, the two are welded and connected.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A connection structure, characterized in that: The invention comprises a welding column with a self-positioning buckle and a welding seat (210), wherein the welding column with a self-positioning buckle comprises a base (110), a welding column body (120) is arranged on the base (110), one end of the welding column body (120) is connected to the base (110), and the other end extends away from the base (110) to form a plug-in end, and an undercut (130) is arranged on the side wall of the welding column body (120); At least two positioning ribs (140) are arranged on the side wall of the welding column body (120), all the positioning ribs (140) are evenly distributed in an annular direction 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 platform is also provided on the side wall of the welding column body (120); the orientation of the support platform is consistent with the orientation of the plug-in end, and the support platform is located between the undercut (130) and the base (110); There are at least four positioning ribs (140), wherein a middle portion of one of the positioning ribs (140) extends radially outward along the welding column body (120) to form the undercut (130); The end of the positioning rib (140) close to the plug-in end extends toward the plug-in end, and its protruding height gradually decreases, thereby forming a plug-in guide portion (141); The welding seat (210) is provided with an insertion hole (220), the welding column body (120) is inserted into the insertion hole (220), and the positioning rib (140) abuts against the wall of the insertion hole (220); The undercut (130) and the support platform are respectively abutted against the welding seat (210) from both ends of the insertion hole (220); A clearance notch is formed on the wall of the insertion hole (220) corresponding to the undercut (130), and the clearance notch is close to the edge of the plug-in end and extends toward the undercut (130) to form a clamping platform (230), and the undercut (130) is attached to the clamping 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 clearance gap; A guide chamfer (240) is provided at the edge of the clearance notch close to the base (110).

2. A connection structure according to claim 1, characterized in that: The side wall of the solder column body (120) partially extends radially outward to form the undercut (130), and the height of the undercut (130) protruding from the side wall of the solder column body (120) gradually decreases from the undercut (130) to the plug-in end.

3. A connection structure according to claim 1, characterized in that: A support rib (150) is connected between the positioning rib (140) and the base (110); the support rib (150) and the corresponding positioning rib (140) are located in the same plane; the end surface of the support rib (150) facing the plug-in end forms the support platform; the surface of the support platform is perpendicular to the column center line of the welding column body (120).

4. A connection structure according to claim 1 or 2, characterized in that: A penetration hole (111) is partially penetrated through the base (110) facing the undercut (130).

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