Welding structure

Abstract

The welding structure comprises a first connecting piece, a second connecting piece and a welding piece, the welding piece comprises a welding part and a base material, the melting point of the welding part is lower than that of the base material, and a first part of the welding part is located between the base material and the first connecting piece and welds the base material and the first connecting piece; and the second part of the welding part is positioned between the base material and the second connecting piece and is used for welding the base material and the second connecting piece, so that the welding effect is improved.

Description

Technical Field

[0001] The present application relates to the field of welding technology, and in particular to a welding structure. Background Art

[0002] When welding two components, pure solder is usually used. During the welding process, all the pure solder melts, and the gap between the two components is large. When the solder is not enough to fill the gap, a gap is easily formed, resulting in poor welding effect and a large amount of solder used. Summary of the invention

[0003] The purpose of this application is to provide a welding structure that is beneficial to improving the welding effect.

[0004] To achieve the above purpose, an implementation method of the present application adopts the following technical solution:

[0005] A welding structure comprises a first connecting member, a second connecting member and a welding member, wherein at least a portion of the welding member is located between the first connecting member and the second connecting member, the welding member comprises a welding portion and a substrate, the melting point of the welding portion is lower than the melting point of the substrate, a first portion of the welding portion is located between the substrate and the first connecting member and welds the substrate and the first connecting member, and a second portion of the welding portion is located between the substrate and the second connecting member and welds the substrate and the second connecting member.

[0006] In one embodiment provided in the present application, a welding structure includes a first connecting member, a second connecting member and a welding member, the welding member includes a welding portion and a substrate, the melting point of the welding portion is lower than the melting point of the substrate, the first part of the welding portion is located between the substrate and the first connecting member and welds the substrate and the first connecting member, the second part of the welding portion is located between the substrate and the second connecting member and welds the substrate and the second connecting member; the provision of the substrate divides the gap between the first connecting member and the second connecting member into two gaps, the capillary action is enhanced, and the molten solder of the welding portion can more easily fill the gap between the first connecting member and the second connecting member, which is beneficial to improving the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a three-dimensional structural schematic diagram of a first embodiment of the welding structure provided by the present application from one viewing angle;

[0008] Figure 2 yes Figure 1 Schematic diagram of the explosion structure of the welded structure;

[0009] Figure 3 It is a structural schematic diagram of the welding structure from another perspective;

[0010] Figure 4 yes Figure 3Schematic diagram of the cross-sectional structure of the welding structure along the AA plane;

[0011] Figure 5 yes Figure 4 A schematic diagram of the three-dimensional structure of a welded part from one perspective;

[0012] Figure 6 yes Figure 4 A schematic diagram of the front view structure of the welded part;

[0013] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure of the welded part along the BB plane;

[0014] Figure 8 is a schematic cross-sectional structural diagram of the second embodiment of the welding structure provided by the present application along the AA plane;

[0015] Fig. 9 It is a schematic diagram of the exploded structure of the third embodiment of the welding structure provided by the present application;

[0016] Fig.10 It is a schematic cross-sectional structural diagram of the third embodiment of the welding structure provided by the present application along the AA plane;

[0017] Fig.11 yes Fig.10 A schematic diagram of a three-dimensional structure of the second connecting member from one viewing angle;

[0018] Fig.12 yes Fig.10 A schematic diagram of the three-dimensional structure of a welded part from one perspective;

[0019] Fig.13 yes Fig.12 A schematic diagram of the front view structure of the welded part;

[0020] Fig.14 yes Fig.13 Schematic diagram of the cross-sectional structure of the welded part along the CC plane. DETAILED DESCRIPTION

[0021] The present application is further described below with reference to the accompanying drawings and specific embodiments:

[0022] Combination Figure 1-Figure 7, illustrates a first embodiment of a welding structure 100. The welding structure 100 can be used in conjunction with a heat exchange device, such as a heat exchanger, an oil cooler, etc. The welding structure 100 can be used to allow fluid to flow into or out of the heat exchange device. The welding structure 100 can also be used in the field of integrated components. The welding structure 100 can connect the heat exchange device with other components. In this embodiment, the welding structure 100 includes a first connector 1, a second connector 2, and a welding member 3. At least part of the welding member 3 is located between the first connector 1 and the second connector 2. The welding member 3 includes a welding portion 36 and a substrate 33. The melting point of the welding portion 36 is lower than the melting point of the substrate 33. During the welding process, the welding portion 36 melts and the substrate 33 does not melt. The welding portion 36 includes a first portion 31 and a second portion 32. The first portion 31 of the welding portion 36 is located between the substrate 33 and the first connector 1 and welds the substrate 33 and the first connector 1. The second portion of the welding portion 36 is located between the substrate 33 and the second connector 2 and welds the substrate 33 and the second connector 2. The first connector 1 and the second connector 2 are connected by welding through the welding piece 3. The provision of the substrate 33 divides the gap between the first connector 1 and the second connector 2 into two gaps, the capillary action is enhanced, and the molten solder of the welding portion 36 can more easily fill the gap between the first connector 1 and the second connector 2, which is beneficial to improving the welding effect between the first connector 1 and the second connector 2; in addition, the substrate 33 divides the gap between the first connector 1 and the second connector 2 into two welds, which is beneficial to improving the welding quality compared to the scheme in which the welding piece 3 is completely melted to form a weld between the first connector 1 and the second connector 2; in addition, for the scheme in which pure solder is completely melted, the gap between the second connector 2 and the first connector 1 is larger, and the amount of solder used is also more. In this scheme, the substrate 33 can fill part of the gap between the second connector 2 and the first connector 1, which can save the amount of solder used and is beneficial to reducing the cost of the welding structure 3. For the convenience of description, the upper and lower directions are defined as the upper and lower directions in the attached drawings of the specification. Figure 4 The up, down, left and right directions of a device only indicate relative positions.

[0023] In this embodiment, the first connecting member 1 is roughly tubular, the second connecting member 2 is roughly tubular, the second connecting member 2 includes a sleeve portion 21 and a first body portion 22, the sleeve portion 21 is closer to the first connecting member 1 relative to the first body portion 22. The first connecting member 1 includes a connecting portion 11 and a second body portion 12, the connecting portion 11 is closer to the second connecting member 2 relative to the second body portion 12, and the inner peripheral wall of the sleeve portion 21 and the outer peripheral wall of the connecting portion 11 are welded and connected by a welding member 3.

[0024] In this embodiment, the second connector 1 has a housing cavity 221, the inner diameter of the housing cavity 221 is larger than the outer diameter of the connecting portion 11, the welding piece 3 is sleeved on the outer periphery of the connecting portion 11 of the first connector 1, the combined structure of the connecting portion 11 and the welding piece 3 is located in the housing cavity 221, the welding piece 3 is located between the outer peripheral wall of the first connecting portion 11 and the inner peripheral wall forming the housing cavity 221, the outer peripheral wall of the connecting portion 11 and the inner peripheral wall forming the housing cavity 221 are welded and fixed by the welding piece 3, that is, the welding piece 3 is located between the outer peripheral wall of the first connecting portion 11 and the inner peripheral wall of the sleeve portion 21, and the outer peripheral wall of the connecting portion 11 and the inner peripheral wall of the sleeve portion 21 are welded and fixed by the welding piece 3. In this application, the outer peripheral wall of the substrate 33 refers to the wall of the substrate 33 on the side close to the second connector 2, and the inner peripheral wall of the substrate 33 refers to the wall of the substrate 33 on the side close to the first connector 1.

[0025] Combination Figure 4 and Figure 5 In this embodiment, the welding piece 3 is roughly annular, and the welding piece 3 is sleeved on the outer periphery of the connecting portion 11. In this embodiment, the first connecting member 1 also includes a flange portion 13, which is located between the connecting portion 11 and the second body portion 12, and the outer diameter of the flange portion 13 is greater than the outer diameter of the connecting portion 11. The bottom wall 352 of the welding piece 3 and the upper wall 131 of the flange portion 13 are contacted and arranged, and the arrangement of the flange portion 13 can provide installation positioning for the welding piece 3 to be installed on the connecting portion 11. In this embodiment, the flange portion 13 and the connecting portion 11 are integral structures, and the flange portion 13 is formed by stamping, and the flange portion 13 protrudes from the inner peripheral wall of the first connecting member 1 toward the outer peripheral wall of the first connecting member 1, so that the forming process of the flange portion 13 is simple. In other embodiments, the flange portion 13 and the connecting portion 11 can also be split structures, and the flange portion 13 and the connecting portion 11 are fixedly connected or limitedly connected, and the fixed connection includes welding, bonding, clamping, etc., and the limited connection includes interference fit connection, etc.

[0026] In this embodiment, the combined structure of the welding piece 3 and the connecting part 11 is placed in the accommodating cavity 221 of the second connecting part 2. In this embodiment, the inner peripheral wall of the welding piece 3 and the outer peripheral wall of the connecting part 11 are interference-fitted, the outer peripheral wall of the welding piece 3 and the inner peripheral wall forming the accommodating cavity 221 are interference-fitted, the welding piece 3 and the first connecting part 1 are interference-fitted, and the welding piece 3 and the second connecting part 2 are interference-fitted, which can prevent the welding piece 3 from moving during the movement of the welding structure 100, and facilitate the transportation of the welding structure 100; the welding piece 3 is positioned between the first connecting part 1 and the second connecting part 2, which is also conducive to controlling the position and width of the weld seam, and ensuring the brazing quality between the first connecting part 1 and the second connecting part 2. The welding piece 3 and the first connecting part 1 can be interference-fitted, and the welding piece 3 and the second connecting part 2 can be interference-fitted by applying pressure to the combined structure of the first connecting part 1, the welding piece 3 and the second connecting part 2. When an interference fit is achieved between the welding part 3 and the first connecting part 1, and an interference fit is achieved between the welding part 3 and the second connecting part 2 by applying pressure, the upper wall 131 of the flange portion 13 and the bottom wall 211 of the sleeve portion 21 are arranged in contact, so that the arrangement of the flange portion 13 can provide installation positioning and limiting effects for the cooperation between the connecting part 11 and the sleeve portion 21.

[0027] In other embodiments, the first connecting member 1 may not be provided with the flange portion 13. In other embodiments, the weldment 3 and the first connecting member 1 may also be clearance-fitted, and the weldment 3 and the second connecting member 2 may also be clearance-fitted. In other embodiments, the weldment 3 and the first connecting member 1 may also be transitionally fit, and the weldment 3 and the second connecting member 2 may also be transitionally fit. In other embodiments, the above-mentioned matching methods may be used in combination, and the matching method of the weldment 3 and the first connecting member 1 may be different from the matching method of the weldment 3 and the second connecting member 2, for example, the weldment 3 and the first connecting member 1 may be interference fit, and the weldment 3 and the second connecting member 2 may be clearance fit or transition fit.

[0028] When the welding structure 3 and the heat exchanger are used together, the welding structure 3 and the heat exchanger are limitedly connected or fixedly connected, and the assembled structure of the welding structure 3 and the heat exchanger is placed in a brazing furnace for brazing. The limited connection connection method includes interference fit connection, threaded connection, clamping, etc., and the fixed connection includes welding, bonding, etc. During the welding process, the first part 31 of the welding part 36 and the second part 32 of the welding part 36 melt, and the base material 33 does not melt. The first part 31 of the welding part 36 melts to fill the gap between the inner peripheral wall of the base material 33 and the outer peripheral wall of the connecting part 11, and the outer peripheral wall of the connecting part 11 and the inner peripheral wall of the base material 33 are welded together through the first part 31 of the welding part 36. The molten solder of the second portion 32 of the welding portion 36 fills the gap between the outer wall of the substrate 33 and the inner wall forming the accommodating cavity 221, that is, the molten solder of the second portion 32 of the welding portion 36 fills the gap between the outer wall of the substrate 33 and the inner wall of the sleeve portion 21, and the inner wall of the sleeve portion 21 and the outer wall of the substrate 33 are welded together through the second portion 32 of the welding portion 36.

[0029] The gap between the first connector 1 and the second connector 2 is divided into two gaps by the substrate 33, which can enhance the capillary effect. The molten solder of the welding part 36 flows under the capillary effect. The molten solder of the first part 31 of the welding part 36 can easily fill the gap between the inner peripheral wall of the substrate 33 and the outer peripheral wall of the connecting part 11, and the molten solder of the second part 32 of the welding part 36 can easily fill the gap between the outer peripheral wall of the substrate 33 and the inner peripheral wall of the sleeve part 21, which is beneficial to improve the welding effect of the first connector 1 and the second connector 2 and ensure the welding quality. In addition, the substrate 33 divides the weld between the second connector 2 and the first connector 1 into two welds. Compared with the solution in which the welding part 3 is completely melted, the weld between the first connector 1 and the second connector 2 is divided into two welds by the base material 33. Both welds are relatively narrow, which is conducive to improving the welding quality between the first connector 1 and the second connector 2. In addition, the first connector 1 and the second connector 2 are welded by the welding part 3, which is convenient and has high welding quality. In addition, after the welding structure 100 and the heat exchanger are assembled, they are put into the brazing furnace as a whole for welding, which can simplify the forming process of the heat exchanger. Of course, in other embodiments, the first connector 1 and the second connector 2 can also be used in conjunction with other components after welding.

[0030] Reference Figure 7In this embodiment, the welding part 36 and the substrate 33 are connected by rolling, the first part 31 covers the inner peripheral wall of the substrate 33, and the second part 32 covers the outer peripheral wall of the substrate 33. The substrate 33 is placed between the first part 31 and the second part 32, and the first part 31, the substrate 33, and the second part 32 are aligned and placed, and then a sheet of a multilayer composite structure is formed by rolling. In this embodiment, the sheet is formed into a circular ring by stamping, and the stamping forming process is simple. In this embodiment, the welding part 3 is a flat circular ring, so that the stamping forming process of the welding part 3 is simple. In other embodiments, the welding part 3 can also be a circular ring with a certain height to increase the area of ​​the welding ring for welding. In other embodiments, the sheet can also be curled into a circular ring, and the circular ring can be closed or not. In other embodiments, the first part 31 and the substrate 33 can also be connected by welding, and the second part 32 and the substrate 33 can also be connected by welding. In other embodiments, the first part 31 and the substrate 33 can also be connected by bonding, and the second part 32 and the substrate 33 can also be connected by bonding. In other embodiments, the first portion 311 may also be covered on one surface of the substrate 33 by spraying, and the first portion 31 may be covered on another surface of the substrate 33 by spraying.

[0031] In other embodiments, the welding portion 36 may also cover the inner peripheral wall, the outer peripheral wall and the upper wall of the substrate 33. In other embodiments, the welding portion 36 may also cover the inner peripheral wall, the outer peripheral wall and the lower wall of the substrate 33. In other embodiments, the welding portion 36 may also cover the inner peripheral wall, the outer peripheral wall, the upper wall and the lower wall of the substrate 33.

[0032] Combination Figure 2 , Figure 4-Figure 7In this embodiment, the first connector 1 is made of aluminum alloy, the second connector 2 is made of aluminum alloy, the substrate 33 is also made of aluminum alloy, the first part 31 includes Mg, Si, Zn, etc., and the melting points of the components of the first part 31 are lower than the melting point of the substrate 33, and the second part 32 includes Mg, Si, Zn, etc., and the melting points of the components of the second part 32 are lower than the melting point of the substrate 33. Aluminum oxide film will be generated on the surface of the first connector 1 and the second connector 2, and the presence of the aluminum oxide film will hinder the connection between the first connector 1 and the second connector 2. Mg element is added to the first part 31 and the second part 32. The Mg element in the first part 31 can interact with the Al element in the first connector 1, and the Mg element in the second part 32 can interact with the Al element in the second connector 2, thereby promoting the wetting of surface aluminum oxide and destroying part of the aluminum oxide film. The molten solder wets and spreads on the outer wall surface of the first connector 1 and the inner wall surface of the substrate 33 to achieve the connection between the first connector 1 and the substrate 33. The molten solder forms a dense weld between the outer wall of the first connector 1 and the inner wall of the substrate 33. The molten solder wets and spreads on the inner wall surface of the second connector 2 and the outer wall surface of the substrate 33 to achieve the connection between the second connector 2 and the substrate 33. The molten solder forms a dense weld between the inner wall of the second connector 2 and the outer wall of the substrate 33 to achieve the welding of the first connector 1 and the second connector 2.

[0033] In this embodiment, the element composition and component ratio of the first part 31 and the second part 32 are basically the same. During welding, the first part 31 and the second part 32 are basically melted simultaneously, and the molten solder of the first part 31 infiltrates the inner peripheral wall of the substrate 33 and the outer peripheral wall of the connecting portion 11, and the molten solder of the first part 31 forms a weld between the inner peripheral wall of the substrate 33 and the outer peripheral wall of the connecting portion 11; the molten solder of the second part 32 infiltrates the outer peripheral wall of the substrate 33 and the inner peripheral wall of the sleeve portion 21, and the molten solder of the second part 32 forms a weld between the outer peripheral wall of the substrate 33 and the inner peripheral wall of the sleeve portion 21, so that the outer peripheral wall of the substrate 33 and the sleeve portion 21 are welded. The weld between the inner circumferential wall and the weld between the outer circumferential wall of the substrate 33 and the inner circumferential wall of the sleeve portion 21 have a high degree of consistency, the welding is uniform, and the welding quality is good; in addition, the welding of the substrate 33 and the second connecting member 2 is completed at the same time as the welding of the substrate 33 and the first connecting member 1, and the first connecting member 1 and the second connecting member 2 are welded into shape at one time, which is conducive to simplifying the welding process of the first connecting member 1 and the second connecting member 2; in addition, the materials of the substrate 33, the first connecting member 1, and the second connecting member 2 are the same, and the solder has a good wetting effect on the substrate 33, the first connecting member 1, and the second connecting member 2, so that the welding quality between the first connecting member 1 and the second connecting member 2 is better. In other embodiments, the material of the substrate 33, the first connector 1, and the second connector 2 can all be aluminum; or, the material of the substrate 33 is aluminum alloy, and the material of the first connector 1 and the second connector 2 are both aluminum; or, the material of the substrate 33 is aluminum, and the material of the first connector 1 and the second connector 2 are both aluminum alloy; or, the material of the substrate 33 is aluminum, and one of the first connector 1 and the second connector 2 is aluminum alloy, and the other is aluminum. In other embodiments, the material of the first connector 1 can also be copper or copper alloy, the second connector 2 can also be copper or copper alloy, the material of the substrate 33 can also be copper or copper alloy, the welding part 36 can be used to weld copper and copper, can also be used to weld copper alloy and copper alloy, can also be used to weld copper and copper alloy, and the constituent elements of the welding part 35 can be adjusted according to the materials of the two parts to be welded.

[0034] In other embodiments, the element composition of the first part 31 and the second part 32 may also be different. In other embodiments, the element composition of the first part 31 and the second part 32 is the same, and the corresponding element composition ratios of the first part 31 and the second part 32 may be different. In other embodiments, the welding member 3 can also be used to weld the first connecting member 1 and the second connecting member 2 of two different materials.

[0035] In other embodiments, multiple welding parts 3 can be set, and the multiple welding parts 3 are arranged at intervals along the gap between the first connecting part 1 and the second connecting part 2. The multiple welding parts 3 are arranged at intervals along a direction parallel to the center line of the welding structure 100. There is solder between two adjacent welding parts 3, and the solder can melt. This can also improve the welding effect between the first connecting part 1 and the second connecting part 2.

[0036] In other embodiments, a substrate 33 may be provided between a portion of the first part 31 and a portion of the second part 32, and a substrate 33 may not be provided between the first part 31 of another portion and the second part 32 of another portion, and the first part 31 of another portion and the second part 32 of another portion are directly connected, that is, a substrate 33 may be provided between a portion of the connecting part 11 and a portion of the sleeve part 21, and a substrate 33 may not be provided between the portion of the connecting part 11 and the portion of the sleeve part 21, and the portion of the connecting part 11 and the portion of the sleeve part 21 are directly connected through a weld formed by molten solder, which can also improve the welding effect between the first connecting member 1 and the second connecting member 2.

[0037] In another embodiment, part of the welding part 3 can be located between the outer circumferential wall of the connecting part 11 and the inner circumferential wall of the sleeve part 21, and part of the welding part 3 can be located outside the gap between the outer circumferential wall of the connecting part 11 and the inner circumferential wall of the sleeve part 21, so that welding between the first connecting part 1 and the second connecting part 2 can also be achieved.

[0038] In other embodiments, the first connector 1 may be roughly plate-shaped, the second connector 2 may also be roughly plate-shaped, the welding member 3 may be roughly sheet-shaped, the first connector 1 and the second connector 2 may be arranged opposite to each other, and the welding member 3 may be located between the surface of the first connector 1 and the surface of the second connector 2. In this embodiment, the welding member 3 is located between the upper surface of the first connector 1 and the lower surface of the second connector 2, the first connector 1 and the second connector 2 are connected by welding through the welding member 3, the molten solder of the first part 31 of the welding portion 36 fills the gap between the base material 33 and the upper surface of the first connector 1, and the molten solder of the second part 32 of the welding portion 36 fills the gap between the base material 33 and the lower surface of the second connector 2.

[0039] In other embodiments, the first connecting member 1 can also be roughly plate-shaped, and the first connecting member 1 includes a accommodating cavity 221, which is recessed from the upper surface of the first connecting member 1 toward the lower surface of the first connecting member 1, and the second connecting member 2 is also roughly tubular, and the connecting portion 11 of the second connecting member 2 is located in the accommodating cavity 221. The welding member 3 is roughly annular, and the welding member 3 is located between the inner circumferential wall forming the accommodating cavity 221 and the outer circumferential wall of the connecting portion 11, and the first connecting member 1 and the second connecting member 2 are connected via the welding member 3.

[0040] In other embodiments, the shape of the welding piece 3 may also be changed according to the shapes of the two connecting pieces to be welded. The welding piece 3 may be semi-circular or arc-shaped.

[0041] Reference Figure 7 , in the second embodiment of the welding structure 100, the inner diameter of the sleeve portion 21 is larger than the inner diameter of the first body portion 22, so that the sleeve portion 21 forms a receiving groove 212, and the welding piece 3 is located between the outer peripheral wall of the connecting portion 11 and the inner peripheral wall of the sleeve portion 21, that is, the welding piece 3 is located in the receiving groove 212, and the arrangement of the receiving groove 212 facilitates the installation of the welding piece 3 and can also provide positioning for the installation of the welding piece 3. The outer peripheral wall of the connecting portion 11 and the inner peripheral wall of the sleeve portion 21 are welded and fixed, the first part 31 of the welding portion 36 is melted to form a solder filling the gap between the inner peripheral wall of the base material 33 and the outer peripheral wall of the connecting portion 11, and the second part 32 of the welding portion 36 is melted to form a solder filling the gap between the outer peripheral wall of the base material 33 and the inner peripheral wall of the sleeve portion 21, and the upper wall 131 of the flange portion 13 is contacted with the bottom wall 211 of the sleeve portion 21, and the flange portion 13 further provides positioning for the installation of the welding piece 3, and can also provide positioning and limiting effects for the cooperation between the second connecting piece 2 and the first connecting piece 1. In other embodiments, the first connecting member 1 may not be provided with the flange portion 13 .

[0042] Combination Figure 9-14 , showing a third embodiment of the welding structure 100, the welding part 3 includes a first part 34 and a second part 35, the outer diameter of the first part 34 is smaller than the outer diameter of the second part 35, the connecting part 11 and the sleeve part 21 are welded and fixed by the first part 34, and the flange part 13 and the sleeve part 21 are welded and fixed by the second part 35. In this embodiment, the second connecting member 2 includes a first groove portion 23 and a second groove portion 24, both of which are located on the inner circumferential wall of the sleeve portion 21, and the first groove portion 23 is close to the first main body portion 22 relative to the second groove portion 24. The wall formed by the first groove portion 23 is larger than the inner diameter of the first main body portion 22, the inner diameter of the wall formed by the second groove portion 24 is larger than the inner diameter of the first main body portion 22, the inner diameter of the wall formed by the second groove portion 24 is larger than the inner diameter of the wall formed by the first groove portion 23, and the second groove portion 24 has an opening away from the first main body portion 22. The arrangement of the first groove portion 23 and the second groove portion 24 can facilitate the installation of the welding member 3, and can also prevent the molten solder of the welding portion 36 of the welding member 3 from overflowing the gap between the inner circumferential wall of the sleeve portion 21 and the outer circumferential wall of the connecting portion 11, thereby improving the welding quality.

[0043] In this embodiment, the first portion 34 is closer to the second connector 2 relative to the second portion 35, and the outer diameter of the first portion 34 is smaller than the outer diameter of the second portion 35, so that the welding area between the welding member 3 and the sleeve portion 21 can be increased, the welding area between the welding member 3 and the flange portion 13 can be increased, and the welding quality between the first connector 1 and the second connector 2 can be improved. In this embodiment, the first groove portion 23 has a first groove, the first portion 34 is located in the first groove, and the first portion 34 is located between the inner peripheral wall of the first groove portion 23 and the outer peripheral wall of the connecting portion 11. The molten solder of the first part 31 of the first portion 34 fills the gap between the outer peripheral wall of the connecting portion 11 and the inner peripheral wall of the base material 33 of the first portion 34, and the molten solder of the second part 32 of the first portion 34 fills the gap between the inner peripheral wall of the first groove portion 23 and the outer peripheral wall of the base material 33 of the first portion 34. The provision of the first groove portion 23 can facilitate the installation of the welding member 3, and can also prevent the molten solder of the welding portion 36 of the welding member 3 from overflowing the gap between the inner peripheral wall of the sleeve portion 21 and the outer peripheral wall of the connecting portion 11, thereby improving the welding quality. The second groove portion 24 has a second groove, and the second portion 35 is located in the second groove. The second portion 35 is located between the lower wall 241 of the second groove portion 24 and the upper wall 131 of the flange portion 13. The molten solder of the second part 32 of the second portion 35 fills the gap between the lower wall 332 of the substrate 33 of the second portion 35 and the upper wall 131 of the flange portion 13. The molten solder of the second part 32 of the second portion 35 fills the gap between the upper wall 331 of the substrate 33 of the second portion 35 and the lower wall 241 of the second groove portion 24. The setting of the second groove portion 24 can facilitate the installation of the welding part 3, and can also prevent the molten solder of the welding part 36 of the welding part 3 from overflowing from the gap between the bottom wall 211 of the sleeve portion 21 and the upper wall 131 of the flange portion 13, thereby improving the welding quality. In addition, the second portion 35 is provided so that the welding piece 3 is in contact with the upper wall 131 of the flange portion 13, thereby increasing the contact area between the welding piece 3 and the first connecting piece 1, increasing the weld area between the base material 33 and the first connecting piece 1, and facilitating the improvement of the welding area between the base material 33 and the first connecting piece 1, and improving the welding strength; the second portion 35 is provided so that the welding piece 3 is in contact with the bottom wall 211 of the sleeve portion 21, and increasing the contact area between the welding piece 3 and the second connecting piece 2, and facilitating the improvement of the welding area between the base material 33 and the second connecting piece 2, and improving the welding strength. In other embodiments, the second connecting piece 2 may also be provided with only the first groove portion 23, without the second groove portion 24; or, the second connecting piece 2 may also be provided with only the second groove portion 24, without the first groove portion 23; or, the second connecting piece 2 may not have the first groove portion 23 and the second groove portion 24.

[0044] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A welding structure (100), characterized in that: The invention comprises a first connecting member (1), a second connecting member (2) and a welding member (3), wherein at least a part of the welding member (3) is located between the first connecting member (1) and the second connecting member (2), the welding member (3) comprises a welding portion (36) and a substrate (33), the melting point of the welding portion (36) is lower than the melting point of the substrate (33), the first part (31) of the welding portion (36) is located between the substrate (33) and the first connecting member (1) and welds the substrate (33) and the first connecting member (1), and the second part of the welding portion (36) is located between the substrate (33) and the second connecting member (2) and welds the substrate (33) and the second connecting member (2).

2. The welding structure (100) according to claim 1, characterized in that: The second connecting member (2) has a receiving cavity (221), the connecting portion (11) of the first connecting member (1) is located in the receiving cavity (221), the first portion (31) of the welding portion (36) is located between the inner peripheral wall of the base material (33) and the outer peripheral wall of the connecting portion (11), the second portion (32) of the welding portion (36) is located between the outer peripheral wall of the base material (33) and the inner peripheral wall forming the receiving cavity (221), and the first connecting member (1) and the second connecting member (2) are connected by welding via the welding member (3); Alternatively, the first connecting member (1) and the second connecting member (2) are arranged opposite to each other, the first portion (31) of the welding portion (36) is located between the surface of the substrate (33) and the surface of the first connecting member (1), the second portion (32) of the welding portion (36) is located between the surface of the substrate (33) and the surface of the second connecting member (2), and the first connecting member (1) and the second connecting member (2) are connected by welding via the welding member (3).

3. The welding structure (100) according to claim 2, characterized in that: The first connecting member (1) comprises a connecting portion (11), and the second connecting member (2) comprises a sleeve portion (21); The welding piece (3) is located between the outer peripheral wall of the connecting portion (11) and the inner peripheral wall of the sleeve portion (21), and the outer peripheral wall of the connecting portion (11) and the inner peripheral wall of the sleeve portion (21) are fixed by welding through the welding piece (3); Alternatively, the first connecting member (1) further comprises a flange portion (13), the connecting portion (11) is closer to the sleeve portion (21) relative to the flange portion (13), the outer diameter of the flange portion (13) is greater than the outer diameter of the connecting portion (11), the welding member (3) is located between the outer peripheral wall of the connecting portion (11) and the inner peripheral wall of the sleeve portion (21), the connecting portion (11) and the sleeve portion (21) are welded and fixed by the welding member (3), and the flange portion (13) and the sleeve portion (21) are arranged in contact with each other; Alternatively, the first connecting member (1) further comprises a flange portion (13), the connecting portion (11) is closer to the sleeve portion (21) relative to the flange portion (13), the outer diameter of the flange portion (13) is larger than the outer diameter of the connecting portion (11), a portion of the welding member (3) is located between the outer peripheral wall of the connecting portion (11) and the inner peripheral wall of the sleeve portion (21), the connecting portion (11) and the sleeve portion (21) are welded and fixed by means of the portion of the welding member (3), and another portion of the welding member (3) is located between the flange portion (13) and the sleeve portion (21), the flange portion (13) and the sleeve portion (21) are welded and fixed by means of the other portion of the welding member (3).

4. The welding structure (100) according to claim 3, characterized in that: The outer peripheral wall of the connecting portion (11) and the inner peripheral wall of the sleeve portion (21) are fixed by welding through the base material (33); the solder formed by melting the first part (31) of the welding portion (36) fills the gap between the inner peripheral wall of the base material (33) and the outer peripheral wall of the connecting portion (11); the solder formed by melting the second part of the welding portion (36) fills the gap between the outer peripheral wall of the base material (33) and the inner peripheral wall of the sleeve portion (21); the upper wall (131) of the flange portion (13) and the bottom wall (211) of the sleeve portion (21) are arranged in contact.

5. The welding structure (100) according to claim 3, characterized in that: The second connecting member (2) comprises a first main body portion (22), the sleeve portion (21) is closer to the first connecting member (1) relative to the first main body portion (22), the inner diameter of the sleeve portion (21) is larger than the inner diameter of the first main body portion (22), the welding member (3) is located between the outer peripheral wall of the connecting portion (11) and the inner peripheral wall of the sleeve portion (21), the outer peripheral wall of the connecting portion (11) and the inner peripheral wall of the sleeve portion (21) are welded and fixed, the solder formed by the melting of the first part (31) of the welding portion (36) fills the gap between the inner peripheral wall of the base material (33) and the outer peripheral wall of the connecting portion (11), the solder formed by the melting of the second part (32) of the welding portion (36) fills the gap between the outer peripheral wall of the base material (33) and the inner peripheral wall of the sleeve portion (21), and the upper wall (131) of the flange portion (13) and the bottom wall (211) of the sleeve portion (21) are arranged in contact.

6. The welding structure (100) according to claim 3, characterized in that: The welded part (3) comprises a first part (34) and a second part (35), wherein the second part (35) is closer to the flange part (13) relative to the first part (34), the outer diameter of the first part (34) is smaller than the outer diameter of the second part (35), the first part (34) is located between the outer peripheral wall of the connecting part (11) and the inner peripheral wall of the sleeve part (21), the outer peripheral wall of the connecting part (11) and the inner peripheral wall of the sleeve part (21) are welded and fixed by the first part (34), and the second part (35) is located between the bottom wall (211) of the sleeve part (21) and the upper wall (131) of the flange part (13), the upper wall (131) of the flange part (13) and the bottom wall (211) of the sleeve part (21) are welded and fixed by the second part (35).

7. The welding structure (100) according to claim 6, characterized in that: The first portion (34) is located between the outer peripheral wall of the connecting portion (11) and the inner peripheral wall of the sleeve portion (21); the molten solder of the first part (31) of the first portion (34) fills the gap between the outer peripheral wall of the connecting portion (11) and the inner peripheral wall of the base material (33) of the first portion (34); the molten solder of the second part (32) of the first portion (34) fills the gap between the inner peripheral wall of the sleeve portion (21) and the outer peripheral wall of the base material (33) of the first portion (34); the second portion (35) is located between the sleeve portion (21) and the inner peripheral wall of the base material (33) of the first portion (34); The molten solder of the first portion (31) of the second portion (35) fills the gap between the lower wall (332) of the base material (33) of the second portion (35) and the upper wall (131) of the flange portion (13), and the molten solder of the second portion (32) of the second portion (35) fills the gap between the upper wall (331) of the base material (33) of the second portion (35) and the bottom wall (211) of the sleeve portion (21).

8. The welding structure (100) according to claim 6, characterized in that: The second connecting member (2) comprises a first main body portion (22), the sleeve portion (21) being closer to the first connecting member (1) relative to the first main body portion (22), the second connecting member (2) further comprising a first groove portion (23) and a second groove portion (24), the first groove portion (23) and the second groove portion (24) being both located on the inner peripheral wall of the sleeve portion (21), the first groove portion (23) being closer to the first main body portion (22) relative to the second groove portion (24), the inner diameter of the wall formed by the first groove portion (23) being greater than the inner diameter of the first main body portion (22), the inner diameter of the wall formed by the second groove portion (24) being greater than the inner diameter of the first main body portion (22), the inner diameter of the wall formed by the second groove portion (24) being greater than the inner diameter of the wall formed by the first groove portion (23), the second groove portion (24) having an opening facing away from the first main body portion (22), the first portion (34) being located between the inner peripheral wall of the first groove portion (23) and the outer peripheral wall of the connecting portion (11). The first portion (34) is provided between the walls, the molten solder of the first part (31) of the first part (34) fills the gap between the outer peripheral wall of the connecting portion (11) and the inner peripheral wall of the base material (33) of the first portion (34), the molten solder of the second part (32) of the first part (34) fills the gap between the inner peripheral wall of the first groove portion (23) and the outer peripheral wall of the base material (33) of the first portion (34), and the second portion (35) is located between the lower wall (241) of the second groove portion (24) and the The molten solder of the first portion (31) of the second portion (35) fills the gap between the lower wall (332) of the substrate (33) of the second portion (35) and the upper wall (131) of the flange portion (13), and the molten solder of the second portion (32) of the second portion (35) fills the gap between the upper wall (331) of the substrate (33) of the second portion (35) and the lower wall (241) of the second groove portion (24).

9. The welding structure (100) according to any one of claims 3 to 8, characterized in that: The flange portion (13) and the connecting portion (11) are an integral structure, the flange portion (13) is stamped, and the flange portion (13) protrudes from the inner peripheral wall of the first connecting member (1) toward the outer peripheral wall of the first connecting member (1); or, the flange portion (13) and the connecting portion (11) are separate structures, and the flange portion (13) and the connecting portion (11) are fixedly connected or limit-connected.

10. The welding structure (100) according to claim 9, characterized in that: The first connecting member (1), the substrate (33), and the second connecting member (2) are all made of aluminum; or, the first connecting member (1), the substrate (33), and the second connecting member (2) are all made of aluminum alloy; or, the substrate (33) is made of aluminum, and the first connecting member (1) and the second connecting member (2) are all made of aluminum alloy; or, the substrate (33) is made of aluminum alloy, and the first connecting member (1) and the second connecting member (2) are all made of aluminum.

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