Structure for relieving welding stress
By designing a sealing area and a clearance area in the connection hole of the encapsulation shell, and using the welding part and buffer part of the transition ring to cooperate, the problem of deformation or cracking of the welded parts caused by welding stress is solved, and a stable connection between the insulator and the encapsulation shell is achieved.
Patent Information
- Application Number
- CN202520228151.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-02-13
AI Technical Summary
In electronic packaging technology, the welding stress is relatively large due to the difference in the thermal expansion coefficients of the materials when welding insulators to the packaging shell. This can easily cause deformation or cracking of the welded parts, affecting the long-term reliability of the connection.
The structure is designed to alleviate welding stress, including a connection hole in the encapsulation housing designed as a sealing area and a clearance area, and a transition ring for the insulator assembly. The welded part is interference-fitted with the sealing area, and the buffer part is clearance-fitted with the clearance area, providing deformation space to reduce welding stress.
It effectively reduces the risk of damage or deformation to the packaging shell and insulation components caused by welding stress, ensuring the strength and long-term reliability of the weld.
Smart Images
Figure CN223885461U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of electronic packaging, more specifically, relate to a structure of relieving welding stress. BACKGROUND
[0002] In the electronic packaging technology, the insulator is often connected with the packaging shell, generally, the mounting hole suitable for the insulator is set on the packaging shell, the insulator is inserted into the mounting hole, and then the insulator is fixed to the packaging shell by plug welding.
[0003] However, since the two parts to be welded are wrapped before plug welding, when the thermal expansion coefficients of the two parts to be welded are quite different, a large stress will be generated at the welding position after welding, which can easily cause deformation or cracking of the two parts to be welded after welding, thereby affecting the long-term reliability of product sealing. Therefore, how to effectively relieve the welding stress of the insulator and the packaging shell is a problem to be solved. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a structure of relieving welding stress, and aims at solving the problem of large stress after plug welding of the insulator and the packaging shell, which affects the connection firmness.
[0005] To achieve the above object, the utility model adopts the technical scheme of:
[0006] Provided is a structure of relieving welding stress, comprising:
[0007] A packaging shell body is provided with a through connecting hole, the connecting hole comprises a sealing area and a avoiding area distributed along the axis thereof; and
[0008] An insulator assembly is inserted into the connecting hole, the insulator assembly comprises a lead wire, an insulator sleeved outside the lead wire and a transition ring sleeved outside the insulator, the transition ring comprises a welding part and a buffer part distributed along the axis thereof, the welding part is in interference fit with the sealing area, and the buffer part is in gap fit with the avoiding area.
[0009] In a possible implementation manner, the axial height of the avoiding area is greater than the axial height of the sealing area.
[0010] In a possible implementation manner, the sealing area is located in the middle part, and the avoiding area is distributed on both sides of the sealing area in the axial direction.
[0011] In a possible implementation manner, the diameter of the avoiding area is greater than the diameter of the sealing area.
[0012] In a possible implementation, the transition ring comprises a transition body and a welding flange arranged on the outer circumferential surface of the transition body, the welding flange forms the welding portion, and the transition body forms the buffer portion.
[0013] In a possible implementation, the outer circumferential surface of the transition ring is provided with an annular gap slot in the circumferential direction, and the gap slot forms the buffer portion.
[0014] In a possible implementation, the connecting hole is a cylindrical hole body, the gap area is provided with a plurality of interval distributed grooves in the circumferential direction, and the grooves are communicated with the connecting hole in the radial direction.
[0015] In a possible implementation, the groove is a trapezoidal groove body, and the radial depth of the groove gradually increases away from one side of the sealing area.
[0016] In a possible implementation, the sealing area is a circular hole body, the gap area is a tapered cylinder body, the hole diameter of the gap area gradually increases away from one side of the sealing area, and the small diameter end of the gap area is consistent with the diameter of the sealing area.
[0017] In a possible implementation, the buffer portions are spaced apart in the axial direction of the transition ring, and the gap areas are arranged correspondingly to the buffer portions.
[0018] The beneficial effect of the structure for relieving welding stress provided by the utility model lies in that, compared with the prior art, the transition ring of the structure for relieving welding stress of the utility model has a welding portion and a buffer portion, the welding portion is in interference fit with the sealing area of the packaging shell, and the welding and fixation of the insulation assembly and the packaging shell are realized. The buffer portion of the transition ring is in clearance fit with the gap area of the packaging shell, provides a deformation space for the deformation of the transition ring and the packaging shell after the welding is completed, reduces the contact area of the transition ring and the packaging shell, avoids the problem that the stress is too large due to the difference in thermal expansion coefficient between the transition ring and the packaging shell, and further causes the cracking or deformation of the packaging shell and / or the transition ring. The utility model has a simple structure, reduces the problem that the packaging shell and / or the insulation assembly are damaged or deformed due to the welding stress while ensuring the effective welding of the insulation assembly and the packaging shell. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.
[0020] Figure 1The cross-sectional view of the structure for relieving welding stress provided by the embodiment one of the utility model;
[0021] Figure 2 The cross-sectional view of the structure for relieving welding stress provided by the embodiment two of the utility model;
[0022] Figure 3 The cross-sectional view of the structure for relieving welding stress provided by the embodiment three of the utility model;
[0023] Figure 4 The cross-sectional view of the packaging shell adopted by the embodiment four of the utility model;
[0024] Figure 5 The structure schematic view of the packaging shell adopted by the embodiment five of the utility model;
[0025] Figure 6 The cross-sectional view of the insulator subassembly adopted by the embodiment six of the utility model.
[0026] In the figure: 1, packaging shell;101, connecting hole;1011, sealing area;1012, avoiding area;1013, recess;2, insulator subassembly;201, lead wire;202, insulator;203, transition ring;2031, buffer part;2032, welding part;2033, transition main body;2034, welding flange;2035, give place slot. DETAILED DESCRIPTION
[0027] In order to make the technical problem, technical scheme and beneficial effect to be solved by the utility model more clear and obvious, the utility model is further explained in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.
[0028] In the claims, description, and accompanying drawings of this utility model, unless otherwise expressly defined, the terms "first," "second," or "third," etc., are used to distinguish different objects, not to describe a specific order. Unless otherwise stated, other directional terms, such as "vertical," "clockwise," and "counterclockwise," indicate orientation or positional relationships based on the orientation and positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, not to indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this utility model. In the claims, description, and accompanying drawings of this utility model, unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" should be interpreted broadly, that is, any connection method in which there is no displacement relationship or relative rotation relationship between the two, that is, including non-removable fixed connection, detachable fixed connection, integral connection, and fixed connection through other devices or elements. In the claims, description, and accompanying drawings of this utility model, the terms "comprising," "having," and their variations are intended to mean "including but not limited to."
[0029] Please refer to the following: Figures 1 to 6 The structure for relieving welding stress provided by this utility model will now be described. The structure for relieving welding stress includes a housing 1 and an insulator assembly 2. The housing 1 has a through connection hole 101, which includes a sealing area 1011 and a clearance area 1012 distributed along its own axis. The insulator assembly 2 is inserted into the connection hole 101. The insulator assembly 2 includes a lead wire 201, an insulator 202 sleeved outside the lead wire 201, and a transition ring 203 sleeved outside the insulator 202. The transition ring 203 includes a welding part 2032 and a buffer part 2031 distributed along its own axis. The welding part 2032 is interference-fitted with the sealing area 1011, and the buffer part 2031 is clearance-fitted with the clearance area 1012.
[0030] The structure for relieving welding stress provided by the utility model has a transition ring 203 with a welding part 2032 and a buffer part 2031 compared with the prior art, the welding part 2032 is in interference fit with the sealing area 1011 of the packaging shell 1, realizing the welding fixation of the insulation assembly and the packaging shell 1. The buffer part 2031 of the transition ring 203 is in clearance fit with the avoiding area 1012 of the packaging shell 1, providing deformation space for the deformation of the transition ring 203 and the packaging shell 1 after the welding is completed, reducing the contact area of the transition ring 203 and the packaging shell 1, avoiding the excessive stress of the transition ring 203 and the packaging shell 1 due to the difference of the thermal expansion coefficient, and further causing the cracking or deformation of the packaging shell 1 and / or the transition ring 203. The utility model has the advantages of simple structure, effectively welding the insulation assembly and the packaging shell 1, and reducing the damage or deformation of the packaging shell 1 and / or the insulation assembly caused by the welding stress.
[0031] In some embodiments, referring to Figure 1 The axial height of the avoiding area 1012 is greater than the axial height of the sealing area 1011.
[0032] In the embodiment, the axial size of the avoiding area 1012 is greater than the sealing area 1011, so that the contact area between the transition ring 203 and the packaging shell 1 can be reduced, the deformation of the transition ring 203 or the packaging shell 1 caused by the welding stress can be avoided, and the mutual extrusion deformation or damage can be avoided.
[0033] Optionally, the axial height of the avoiding area 1012 is not less than twice the axial height of the sealing area 1011.
[0034] In some embodiments, referring to Figure 3 The sealing area 1011 is located in the middle part, and the avoiding area 1012 is distributed on both sides of the sealing area 1011 in the axial direction.
[0035] Since the sealing area 1011 is located in the middle region of the connecting hole 101, the middle part of the transition ring 203 can be welded to the packaging shell 1, and the stress of the transition ring 203 is uniform. In addition, the scheme in the embodiment can also disperse the axial stress of the transition ring 203 and the packaging shell 1 outward, and reduce the probability of deformation and damage.
[0036] Specifically, the welding part 2032 of the transition ring 203 is located at the center, corresponding to the sealing area 1011.
[0037] In some embodiments, referring to Figure 1 The diameter of the avoiding area 1012 is greater than the diameter of the sealing area 1011.
[0038] The transition ring 203 in the embodiment can be a cylindrical member or a columnar member with a boss, and only needs to meet the interference fit between the welding portion 2032 and the sealing area 1011 and the clearance fit between the buffer portion 2031 and the avoiding area 1012, and has no requirement on the specific shape. If the transition ring 203 is a cylindrical member, the transition ring 203 can be inserted from the avoiding area 1012, so as to reduce the resistance in the insertion process.
[0039] In some embodiments, referring to Figure 2 , the transition ring 203 includes a transition body 2033 and a welding flange 2034 arranged on the outer circumferential surface of the transition body 2033, the welding flange 2034 forms the welding portion 2032, and the transition body 2033 forms the buffer portion 2031.
[0040] The outer diameter of the welding flange 2034 is greater than the outer diameter of the transition body 2033, and the welding flange 2034 is interference fit with the sealing area 1011, so as to realize the welding of the transition ring 203 and the packaging shell 1. The transition body 2033 is clearance fit with the avoiding area 1012, so as to provide space for relieving welding stress when the transition ring 203 or the packaging shell 1 is deformed, reduce the interference between the transition ring 203 and the packaging shell 1, and avoid extrusion damage.
[0041] In some embodiments, referring to Figure 6 , the outer circumferential surface of the transition ring 203 is circumferentially provided with an annular accommodation groove 2035, and the accommodation groove 2035 forms the buffer portion 2031.
[0042] A plurality of accommodation grooves 2035 are arranged on the transition ring 203, the connecting hole 101 can be a circular hole with a consistent diameter, the outer wall of the transition ring 203 is interference fit with the connecting hole 101, and the accommodation groove 2035 is clearance fit with the connecting hole 101. After the welding stress is generated, the accommodation groove 2035 and the hole wall of the connecting hole 101 are not in contact, so as to provide deformation space for both, and the transition ring 203 can also be axially deformed to the accommodation groove 2035 due to the welding stress, so as to further reduce the probability of mutual extrusion damage.
[0043] In some embodiments, referring to Figure 5 , the connecting hole 101 is a cylindrical hole body, the avoiding area 1012 is circumferentially provided with a plurality of spaced grooves 1013, and the grooves 1013 are radially communicated with the connecting hole 101.
[0044] In the embodiment, the sealing area 1011 is a circular hole, and is interference fit with the welding portion 2032 on the transition ring 203. Since the avoiding area 1012 is circumferentially provided with a plurality of grooves 1013, a clearance is formed between the grooves 1013 and the buffer portion 2031, so as to provide space for deformation of both.
[0045] Optionally, the outer wall of the buffer portion 2031 is in contact with the inner wall of the connecting hole 101, but a gap is formed in the radial direction with the recess 1013.
[0046] In some embodiments, referring to Figure 5 , the recess 1013 is a trapezoidal groove, and the radial depth of the recess 1013 gradually increases away from one side of the sealing area 1011.
[0047] The trapezoidal groove can make the transition of the relief groove 2035 and the connecting portion of the sealing portion smooth and uniform, avoid forming a step at the connecting portion of the relief groove 2035 and the sealing portion, and ensure the uniform strength of the packaging shell 1, avoiding the problem of stress concentration leading to damage.
[0048] In some embodiments, referring to Figure 4 , the sealing area 1011 is a circular hole, and the relief area 1012 is a conical cylinder, and the hole diameter of the relief area 1012 gradually increases away from one side of the sealing area 1011, and the small diameter end of the relief area 1012 is consistent with the diameter of the sealing area 1011.
[0049] The transition ring 203 in this embodiment can be a cylindrical member, or the buffer portion 2031 can be adapted to the relief area 1012 to form a conical member. Regardless of the shape of the transition ring 203, the welding portion 2032 is required to be in interference fit with the sealing area 1011, and the buffer portion 2031 is required to be in clearance fit with the relief area 1012. This embodiment realizes uniform transition of the sealing area 1011 and the relief area 1012, and facilitates the plug-in fit of the transition ring 203 and the connecting hole 101.
[0050] In some embodiments, referring to Figure 6 , the buffer portion 2031 is spaced apart along the axial direction of the transition ring 203, and the relief area 1012 is correspondingly provided with the buffer portion 2031.
[0051] The buffer portion 2031 is spaced apart along the axial direction, which can not only ensure uniform stress of the transition ring 203, but also provide deformation space for the welding portion 2032 in the axial direction.
[0052] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A structure for relieving welding stresses, characterized in that The utility model relates to a kind of encapsulation shell and insulator subassembly, which is characterized by the following: The encapsulation shell is provided with through connection hole, the connection hole includes sealing area and avoiding area along its axis; And The insulator subassembly is inserted into the connection hole, and the insulator subassembly includes lead, insulator and transition ring, the insulator is sleeved outside the lead, the transition ring is sleeved outside the insulator, the transition ring includes welding portion and buffer portion along its axial direction, the welding portion is interference fit with the sealing area, and the buffer portion is gap fit with the avoiding area.
2. The structure to relieve welding stress according to claim 1, wherein The axial height of the avoiding area is greater than the axial height of the sealing area.
3. The structure to relieve welding stress according to claim 1, wherein The sealing area is located in the middle part, and the avoiding area is distributed on both sides of the sealing area along the axial direction.
4. The structure to relieve welding stress according to claim 1, wherein The diameter of the avoiding area is greater than the diameter of the sealing area.
5. The structure to relieve welding stress according to claim 1, wherein The transition ring includes transition body and welding flange, the welding flange is formed on the outer circumferential surface of the transition body, the welding flange forms the welding portion, and the transition body forms the buffer portion.
6. The structure to relieve welding stress according to claim 1, wherein The outer circumferential surface of the transition ring is provided with annular accommodation slot along the circumferential direction, and the accommodation slot forms the buffer portion.
7. The structure to relieve welding stress according to claim 1, wherein The connection hole is a cylindrical hole body, the avoiding area is provided with a plurality of interval distributed grooves along the circumferential direction, and the grooves are communicated with the connection hole along the radial direction.
8. The structure to relieve welding stress according to claim 7, wherein The groove is trapezoidal groove body, and the radial depth of the groove gradually increases to the side away from the sealing area.
9. The structure to relieve welding stress as claimed in claim 1, wherein The sealing area is circular hole body, the avoiding area is conical cylinder body, the hole diameter of the avoiding area gradually increases to the side away from the sealing area, and the small diameter end of the avoiding area is consistent with the diameter of the sealing area.
10. The structure to relieve welding stress as claimed in claim 1, wherein The buffer portion is spaced along the axial direction of the transition ring, and the avoiding area is correspondingly provided with the buffer portion.