Air spring air chamber connecting structure and air chamber connecting structure welding device and method

Abstract

The invention relates to the technical field of air springs, and provides an air spring air chamber connecting structure and an air chamber connecting structure welding device and method. The air chamber shell comprises a connecting plate, and a through hole is formed in the connecting plate; the bolt is used for penetrating through the through hole from the inner side of the air chamber shell; the section, close to the inner side of the connecting plate, of the through hole forms a first welding area, the section, close to the head of the bolt, of a threaded rod of the bolt forms a first welding part, and the inner diameter of the first welding area is gradually decreased from the inner side of the air chamber shell to the outer side of the air chamber shell. And the outer diameter of the first welding part is gradually reduced from the inner side of the air chamber shell to the outer side of the air chamber shell. Through the self-centering structure of the bolt and the through hole, the position degree of the bolt after welding is improved, the part precision is improved, meanwhile, the problems that a high-strength bolt is insufficient in welding strength and insufficient in fusion depth are solved, 100% effective sealing is achieved through the second welding part, and the weldability of the high-strength bolt is further enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of air springs, and particularly to an air spring air chamber connection structure, a welding device and method for the air chamber connection structure. Background Art

[0002] As an important part of the shock absorption system, the air chamber plays a crucial role in improving the performance and comfort of the suspension system. The upper cover of the air chamber, as an important component of the air chamber, needs to be connected to the vehicle body by bolts, and the connection part must meet the dual requirements of high strength and airtightness. The bolt, as the key component connecting the air chamber and the vehicle body, has relatively high strength requirements, and high-strength bolts are used to ensure the reliability of the connection.

[0003] There are some defects that cannot be ignored in the process of connecting the upper cover of the air chamber and the vehicle body in the prior art, mainly manifested as the welding process cannot guarantee the connection accuracy, the pull-off force is insufficient, and there is a risk of airtightness. Therefore, it is urgent to develop a connection method between the upper cover of the air chamber and the bolt that can overcome the deficiencies of the prior art and has high precision, reliability and airtightness. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide an air spring air chamber connection structure, a welding device and method for the air chamber connection structure, so as to improve the accuracy of the welding position of the bolt.

[0005] To achieve the above purpose and other related purposes, the present invention provides an air spring air chamber connection structure, including:

[0006] An air chamber housing, the air chamber housing includes a connecting plate, and through holes are provided on the connecting plate;

[0007] A bolt, the bolt is used to pass through the through hole from the inside of the air chamber housing;

[0008] Wherein, a section of the through hole close to the inner side of the connecting plate constitutes a first welding area, a section of the screw rod of the bolt close to the head of the bolt constitutes a first welding part, the inner diameter of the first welding area gradually decreases from the inner side of the air chamber housing to the outer side of the air chamber housing, and the outer diameter of the first welding part gradually decreases from the inner side of the air chamber housing to the outer side of the air chamber housing.

[0009] In an optional embodiment of the present invention, a ring-shaped sealing unit is provided on one side of the head of the bolt close to the screw rod.

[0010] In an optional embodiment of the present invention, the ring-shaped sealing unit is a second welding part, and the second welding part is continuously arranged around the axis of the bolt.

[0011] In an alternative embodiment of the present invention, the second welding portion is an annular rib, and the cross-sectional width of the annular rib gradually decreases from a position away from the connecting plate to a position close to the connecting plate.

[0012] The present invention also provides a welding device for a gas chamber connection structure for welding the gas chamber connection structure. The welding device for the gas chamber connection structure includes:

[0013] A first electrode electrically connected to the bolt;

[0014] A second electrode electrically connected to the connecting plate;

[0015] Wherein, the first electrode presses against the head portion to make the first welding portion fit the first welding area, and make the head portion fit the connecting plate.

[0016] In an alternative embodiment of the present invention, the second electrode is a hollow sleeve structure. The hollow portion of the hollow sleeve structure is used to accommodate the screw portion of the bolt passing through the connecting plate. The hollow sleeve structure is arranged at intervals with the screw, and one end of the hollow sleeve structure presses against the outside of the connecting plate.

[0017] In an alternative embodiment of the present invention, the resistance of the first electrode is greater than that of the second electrode.

[0018] The present invention also provides a welding method for a gas chamber connection structure, characterized in that it is applied to the welding device for the gas chamber connection structure, and includes the following steps:

[0019] Electrically connect the first electrode to the bolt, and electrically connect the second electrode to the connecting plate;

[0020] Pass a first-stage current to make the first welding portion and the first welding area reach the critical temperature of melting;

[0021] Pass a second-stage current, and at the same time drive the first electrode to press against the head portion to make the first welding portion fuse with the first welding area;

[0022] Pass a third-stage current, and keep the first electrode pressing against the head portion to keep the welding molten pool between the first welding portion and the first welding area stable.

[0023] In an alternative embodiment of the present invention, the current value of the second-stage current is 1.2 - 1.5 times the current value of the first-stage current, and the current value of the first-stage current is equal to the current value of the third-stage current.

[0024] In an alternative embodiment of the present invention, during the process of passing the third-stage current, the second welding portion contacts the inner side of the connecting plate for welding to form a seal.

[0025] The technical effects of the present invention are as follows: In the air spring air chamber connection structure, the air chamber connection structure welding device and method of the present invention, the self-centering structure of the bolt and the through hole improves the bolt position accuracy after welding, enhances the part accuracy, and at the same time solves the problems of insufficient welding strength and insufficient penetration of high-strength bolts. The 100% effective sealing is achieved through the second welding part, and the weldability of high-strength bolts is also enhanced. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic structural diagram of the air spring air chamber connection structure in the prior art;

[0028] Figure 2 It is a schematic structural diagram of another air spring air chamber connection structure in the prior art;

[0029] Figure 3 It is a schematic structural diagram of the air spring air chamber connection structure in an embodiment of the present invention;

[0030] Figure 4 It is a schematic structural diagram of the bolt of the air spring air chamber connection structure in an embodiment of the present invention;

[0031] Figure 5 It is a schematic structural diagram of the through hole of the air spring air chamber connection structure in an embodiment of the present invention;

[0032] Figure 6 It is an installation schematic diagram of the air chamber connection structure welding device in an embodiment of the present invention.

[0033] Description of the reference numerals: 10, air chamber housing; 11, connecting plate; 12, through hole; 13, first welding area; 20, bolt; 21, first welding part; 22, second welding part; 23, head; 24, screw rod; 30, first electrode; 40, second electrode. Detailed Embodiments

[0034] The following specific examples illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0035] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0036] Currently, the common techniques for connecting the upper cover of the air chamber to the bolt 20 mainly include two methods: fitting welding and piercing welding.

[0037] As Figure 1 shown, in the existing fitting welding technique, the bolt 20 is directly fitted on the concave surface on the reverse side of the upper cover of the air chamber, and then a circumferential welding is performed by gas shielded welding. The advantage of this method is that its construction is relatively simple, but there are also the following several defects:

[0038] During the welding process, due to the influence of thermal deformation, it is difficult to keep the position accuracy of the bolt 20 consistent, and it is difficult to ensure the accuracy.

[0039] After welding, the connection strength between the bolt 20 and the upper cover is relatively low, and the pulling force cannot meet the requirements of high performance. Especially in complex working conditions, it is easy to fail.

[0040] As Figure 2 shown, another common method is piercing welding. The upper cover of the air chamber is designed with a through hole 12. After the bolt 20 passes through the through hole 12, gas shielded welding is performed on the head 23 of the bolt 20. This method can better solve the problem of insufficient pulling force, but there are still the following disadvantages:

[0041] Due to the limitation of the welding process, it is difficult to ensure the accuracy of the position of the bolt 20, resulting in possible position deviation of the bolt 20.

[0042] There is a certain risk of air leakage at the welding joint, affecting the reliability of airtightness.

[0043] In the prior art, there is also a sealing mechanism through a raised welding ring and the outer ring of the bolt 20 to enhance airtightness. However, this design still has the following problems:

[0044] The structure of the bolt 20 consists of two components: the bolt 20 body and the sealing ring, and the fit between the welded ring and the perforated part has relatively high requirements. Once there is a deviation between the stud and the through-hole position, air leakage problems will occur.

[0045] Although the outer sealing ring can play a role in secondary sealing, the sealing ring is prone to being affected by factors such as aging during use, resulting in a decline in the sealing effect, and the high-strength bolt 20 is prone to falling off after welding.

[0046] During the welding process of the high-strength bolt 20, the connection strength may be insufficient due to insufficient melting depth of the material, and the airtightness cannot be effectively guaranteed.

[0047] As Figures 3 - 6 shown, the present invention provides an air spring air chamber connection structure, including an air chamber housing 10 and a bolt 20.

[0048] The air chamber housing 10 includes a connecting plate 11, and a through-hole 12 is provided on the connecting plate 11. The air chamber housing 10 is the external structure of the entire air spring air chamber, and its function is to accommodate and protect the internal gas. The air chamber housing 10 includes a connecting plate 11, and the connecting plate 11 is the part used for connection. The through-hole 12 on the connecting plate 11 is a hole for installing the bolt 20. The through-hole 12 provided on the connecting plate 11 allows other components (such as the bolt 20) to pass through. The size and shape of the through-hole 12 need to match the bolt 20 to ensure that the bolt 20 can pass through smoothly and effectively connect the two parts together.

[0049] The bolt 20 is used to pass through the through-hole 12 from the inside of the air chamber housing 10. The bolt 20 is an important component for fixing and connecting the air chamber housing 10. The bolt 20 passes through the through-hole 12 on the connecting plate 11 from the inside of the air chamber housing 10 and also needs to cooperate with nuts or other fasteners to ensure a firm connection.

[0050] Among them, a section of the through-hole 12 close to the inner side of the connecting plate 11 constitutes a first welding area 13, a section of the screw rod 24 of the bolt 20 close to the head 23 of the bolt 20 constitutes a first welding part 21, the inner diameter of the first welding area 13 gradually decreases from the inside of the air chamber housing 10 to the outside of the air chamber housing 10, and the outer diameter of the first welding part 21 gradually decreases from the inside of the air chamber housing 10 to the outside of the air chamber housing 10.

[0051] The inner diameter of the first welding area 13 and the outer diameter of the first welding part 21 gradually decrease from the inner side to the outer side of the air chamber housing 10, forming a self-centering conical structure. Specifically, the corresponding angles of the first welding part 21 and the first welding area 13 are the same, so the two can be precisely matched, ensuring consistent coaxiality between the bolt 20 and the through hole 12. The self-centering conical structure ensures that during the welding process, the bolt 20 and the through hole 12 always maintain good centering, avoiding offset problems caused by thermal deformation or improper welding processes. In this way, the coaxiality between the bolt 20 and the through hole 12 after welding is guaranteed, ensuring an improvement in connection accuracy. The good coaxiality greatly improves the accuracy of the air chamber connection, thus ensuring the stability and reliability during the installation and use of the product.

[0052] Through the self-centering conical design, the dimensional changes in the welding area ensure better heat conduction and molten depth control during the welding process. This design makes the contact area between the bolt 20 and the air chamber housing 10 more uniform during the welding process, effectively improving the welding strength and molten depth, and avoiding problems of insufficient welding strength caused by uneven contact area or insufficient molten depth in traditional designs.

[0053] The self-centering structure ensures the coaxiality between the bolt 20 and the through hole 12. After welding, the bolt 20 is precisely aligned with the through hole 12, avoiding problems such as misalignment and deviation that may occur in traditional welding. In addition, due to this structural design, it can ensure that the bolt 20 can be accurately positioned after welding, thus improving the accuracy in the subsequent installation process.

[0054] The precise fit of the self-centering conical structure and the improvement in welding strength not only strengthen the mechanical connection between the bolt 20 and the air chamber housing 10, but also can effectively reduce poor sealing caused by position errors. In some designs, a sealing unit or other auxiliary structures may be further used in combination to enhance the sealing performance.

[0055] As Figure 3 、 4 shown, a ring-shaped sealing unit is provided on the side of the head 23 of the bolt 20 close to the screw 24 to achieve secondary sealing. The ring-shaped sealing unit is an important component installed between the head 23 of the bolt 20 and the connecting part of the air chamber housing 10. It is made of flexible materials (such as rubber, polyurethane, etc.). The ring-shaped structure can uniformly contact the sealing surface of the air chamber housing 10 to form an effective sealing area. Through the pressing of the bolt 20, the sealing unit can be compressed and form a tight contact with the contact surface, thus achieving the sealing effect.

[0056] In this structure, the sealing function of the annular sealing unit is the secondary seal, mainly used to supplement or enhance the sealing performance of the connection part between the air chamber housing 10 and the bolt 20. The first seal may be provided by the welding area of the air chamber housing 10 and the connecting component, while the annular sealing unit further ensures the airtightness of the overall connection, especially the sealing requirements under high pressure or vibration environments.

[0057] As Figure 3 , 4 shown, the annular sealing unit is the second welding part 22, and the second welding part 22 is continuously arranged around the axis of the bolt 20. The second welding part 22 is arranged around the axis of the bolt 20 as a means of sealing and enhancing the connection strength. It is fixed to the connecting plate 11 of the air chamber housing 10 through the welding process, used to provide an additional sealing function and enhance the reliability of the mechanical connection. The welding structure of the second welding part 22 ensures the tight combination of the sealing unit, forming an integrated and strong connection.

[0058] As Figure 3 , 4 shown, the second welding part 22 is an annular rib, and the annular rib is a raised structure distributed along the axis direction of the bolt 20. It helps to provide additional support to ensure the tight combination between the air chamber and the connecting plate 11. The cross-sectional width of the annular rib gradually decreases from the position far away from the connecting plate 11 to the position close to the connecting plate 11. The annular rib has a conical angle feature. Due to the tight welding between the second welding part 22 (annular rib) and the connecting plate 11 of the air chamber housing 10, the gaps or voids at the connection part can be effectively reduced, thereby ensuring the airtightness inside the air chamber and preventing gas leakage. This is crucial for the air chamber system that requires high airtightness, especially in a high-pressure environment.

[0059] As Figure 6 shown, the present invention also proposes a welding device for the air chamber connection structure, used to weld the air chamber connection structure described above. The welding device for the air chamber connection structure includes a first electrode 30 and a second electrode 40.

[0060] The first electrode 30 is electrically connected to the bolt 20, and its main function is to transmit current to the bolt 20 area for resistance heating to ensure that the metal in the welding area reaches the melting point, facilitating welding with the connecting plate 11.

[0061] The second electrode 40 is electrically connected to the connecting plate 11, and this electrode is responsible for transmitting current to the connecting plate 11 to melt the metal in the contact area between the connecting plate 11 and the bolt 20 through resistance heating, thereby realizing the welding between the two.

[0062] Wherein, the first electrode 30 presses against the head 23 so that the first welding part 21 fits the first welding area 13, and the head 23 fits the connecting plate 11. The first electrode 30 presses against the head 23 of the bolt 20, making the welding part of the bolt 20 closely fit the welding area of the connecting plate 11. Through the action of the pressure and current of the electrode, the welding area melts at high temperature and realizes metal connection. During the welding process, the metal in the contact area between the bolt 20 and the connecting plate 11 is heated to a certain temperature to form a strong weld and complete the connection.

[0063] Through the precise positioning and pressure application of the first electrode 30 and the second electrode 40, it can ensure that the contact surface between the bolt 20 and the connecting plate 11 is fully contacted, and the heating area during the welding process is uniform and precise, thus ensuring a high degree of consistency and accuracy in the welding quality.

[0064] The conductive contact mode of the electrode ensures the stable flow and uniform distribution of the current, reducing local overheating or welding defects.

[0065] During the welding process, due to the pressure of the electrode, it ensures the tight combination of the first welding area 13 and the head 23 of the bolt 20. The crimping effect of the electrode makes the welding area tighter and enhances the mechanical strength of the welded joint.

[0066] Through the optimized current transmission path, the melting and solidification process of the welding metal is more uniform, avoiding problems such as insufficient local melting or excessive melting, and improving the tensile strength and shear strength of the welded joint.

[0067] As Figure 6 shown, the second electrode 40 is a hollow sleeve structure. The design of the hollow sleeve structure enables it to accommodate the screw 24 part of the bolt 20. That is, when the bolt 20 passes through the connecting plate 11, the screw 24 part of the bolt 20 will enter this hollow sleeve. One end of the hollow sleeve structure presses against the outside of the connecting plate 11 and applies pressure during the welding process. This design ensures a closer contact between the bolt 20 and the connecting plate 11, thus helping to improve the welding quality and avoiding welding defects caused by poor contact.

[0068] In an alternative embodiment of the present invention, the resistance of the first electrode 30 is greater than that of the second electrode 40. The purpose is to control the heat distribution and solve the welding problems caused by the material strength difference between the bolt 20 and the connecting plate 11 (or the materials to be welded).

[0069] The welding heat Q = I 2 Rt.

[0070] Wherein, I is the current, R is the resistance, and t is the time.

[0071] By adjusting the resistance, the distribution of heat can be effectively controlled. In the present invention, since the resistance of the first electrode 30 is greater than that of the second electrode 40, it is ensured that more heat can be concentrated in the area of the second electrode 40 (i.e., the connecting plate 11), so that the temperature difference between the connecting plate 11 and the bolt 20 can be controlled, avoiding excessive melting of the material of the bolt 20, and thus achieving a uniform welding effect.

[0072] In traditional welding, the strength difference between the materials of the bolt 20 and the connecting plate 11 may cause uneven welding, especially when the bolt 20 is not completely melted or over-melted, which affects the welding strength and sealing performance. Through the design of the present invention, especially the technology of the resistance difference between the upper and lower electrodes, the heat distribution is more uniform, and the bolt 20 and the connecting plate 11 can be better fused, solving the welding problems caused by the strength difference.

[0073] By adjusting the resistance difference between the first electrode 30 and the second electrode 40, the present invention can optimize the heat distribution. Since the first electrode 30 has a larger resistance, it can limit the excessive concentration of heat in the bolt 20 part; while the second electrode 40 has a smaller resistance, it can make more heat concentrate in the connecting plate 11 part. In this way, not only the bolt 20 is fully heated, but also the heating of the connecting plate 11 reaches a uniform effect.

[0074] Due to the optimized distribution of heat, the melting area between the bolt 20 and the connecting plate 11 is more uniform, forming a better penetration depth (welding depth). This effect makes the welded joint more firm, especially in the welding of high-strength bolts 20, which can ensure the quality of the welded joint and improve the weldability of the bolt 20.

[0075] High-strength bolts 20 are prone to greater challenges during the welding process due to their high material hardness, and problems such as incomplete welding or cracks are likely to occur. Through the resistance difference technology of the present invention, the weldability of high-strength bolts 20 has been significantly improved, so that high-strength bolts 20 can also be successfully welded under the same welding conditions, solving the problem that high-strength bolts 20 cannot be welded in traditional welding processes.

[0076] The present invention also proposes a welding method for an air chamber connection structure, which is characterized in that it is applied to the air chamber connection structure welding device, and includes the following steps:

[0077] S1. Electrically connect the first electrode 30 to the bolt 20 and electrically connect the second electrode 40 to the connecting plate 11. By ensuring good electrical contact between the electrodes and the target materials (the bolt 20 and the connecting plate 11), the current during the welding process can be smoothly transmitted to the welding area, ensuring the effectiveness and uniformity of the welding current. In this way, sufficient heat can be generated during the welding process, providing a reliable basis for welding.

[0078] S2. Pass the first-stage current to make the first welding part 21 and the first welding area 13 reach the critical temperature of melting. This step, through appropriate current setting, makes the contact area reach the critical temperature, causing the material to start melting, which helps the subsequent welding process proceed smoothly. The material enters the molten state at the melting critical point, providing conditions for the smooth fusion of other current segments during the welding process.

[0079] S3. Pass the second-stage current, and at the same time drive the first electrode 30 to press against the head 23 to fuse the first welding part 21 and the first welding area 13; the current value of the second-stage current is 1.2 - 1.5 times the current value of the first-stage current. The increase in the second-stage current further heats the welding area, promoting the complete fusion between the first welding part 21 and the first welding area 13. Increasing the current can effectively control the heat distribution, avoiding local overheating or overcooling, thus ensuring the quality of the welded joint and enhancing the strength and stability of the welded joint. The technical effect of this step is to increase the welding penetration depth and ensure better fusion of the welding materials.

[0080] S4. Pass the third-stage current, and keep the first electrode 30 pressing against the head 23 to keep the welding molten pool between the first welding part 21 and the first welding area 13 stable. The current value of the first-stage current is equal to the current value of the third-stage current. By keeping the molten pool stable, the third-stage current ensures the continuous heating of the welding area, maintaining the liquid state of the welded part, thus ensuring the full fusion of the first welding part 21 and the first welding area 13. This stability is crucial for the quality of the welded joint and can avoid defects such as cracks and pores during the welding process.

[0081] During the process of passing the third-stage current, the second welding part 22 is in contact with the inner side of the connecting plate 11 for welding to form a seal. By bringing the second welding part 22 into contact with the inner plane of the connecting plate 11, a firm outer ring weld nugget is formed. This not only ensures the strength of the welded joint but also achieves sealing, improving the tightness of the welded structure. Especially in the air chamber connection structure, the tightness is crucial, and this technology can effectively prevent leakage problems and ensure the airtightness of the welded part.

[0082] In summary, by adopting the self-centering structure of the bolt 20 and the through hole 12, the present invention solves the accuracy problems in the prior art caused by thermal deformation during the welding process and the position deviation of the bolt 20. The self-centering structure can ensure that the bolt 20 always maintains an accurate position during the welding process, thereby greatly improving the accuracy of the parts and ensuring the accuracy and stability of the connection part. Through reasonable optimization of the welding area (such as the first welding area 13 and the first welding part 21) in the design of the present invention, the welding depth between the bolt 20 and the air chamber housing 10 is effectively guaranteed. The welding strength is improved, avoiding the insufficient welding strength caused by insufficient penetration depth in the prior art, ensuring the firmness and reliability of the connection, and meeting the requirements of high-strength connection. Through the innovative design of setting the annular sealing unit and the second welding part 22, the present invention successfully achieves 100% effective sealing of the connection part, avoiding the air leakage problem caused by incomplete welding or material aging in the prior art. The setting of the second welding part 22 (such as the annular rib) further enhances the sealing performance, ensures the airtight connection between the air chamber and the vehicle body, and improves the reliability of the overall system. By optimizing the contact area between the bolt 20 and the air chamber housing 10, the present invention improves the welding feasibility of the high-strength bolt 20, avoiding the problems of difficult welding and easy detachment of the high-strength bolt 20 after welding in the prior art. The reasonable welding area design enables the high-strength bolt 20 to be smoothly connected during the welding process, and the welding effect is more stable.

[0083] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

[0084] In the description herein, numerous specific details are provided, such as examples of components or methods, to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that the embodiments of the present invention can be practiced without one or more of the specific details or by other devices, systems, components, methods, parts, materials, parts, etc. In other instances, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

[0085] References throughout this specification to "one embodiment", "an embodiment", or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention and not necessarily in all embodiments. Thus, the appearances of the phrases "in one embodiment", "in an embodiment", or "in a specific embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics of any specific embodiment of the invention may be combined in any suitable manner with one or more other embodiments. It is to be understood that other variations and modifications of the embodiments of the invention described and shown herein may be made in accordance with the teachings herein and will be considered part of the spirit and scope of the invention.

[0086] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separated or more integrated manner, or even removed in some cases in which they are not operable or provided in cases where they may be useful for a particular application.

[0087] In addition, unless otherwise expressly specified, any of the marker arrows in the figures should be considered merely exemplary and not limiting. Further, unless otherwise indicated, the term "or" as used herein is generally intended to mean "and / or". Where the term is anticipated to be unclear due to the ability to provide separation or combination, the combination of components or steps will also be regarded as having been specified.

[0088] As used in the description herein and throughout the claims below, unless otherwise indicated, the singular forms "a", "an", and "the" include plural references. Also, as used in the description herein and throughout the claims below, unless otherwise indicated, the phrase "in" means "in" and "on".

[0089] The foregoing description of the embodiments of the invention shown (including what is described in the Abstract) is not intended to be exhaustive or to limit the invention to the precise forms disclosed herein. While specific embodiments of the invention and examples of the invention have been described herein for illustrative purposes only, various equivalent modifications will be apparent to and can be made by those of ordinary skill in the art within the spirit and scope of the invention. As noted, these modifications can be made to the invention in accordance with the foregoing description of the embodiments of the invention and these modifications will be within the spirit and scope of the invention.

[0090] The present disclosure has generally described systems and methods to facilitate an understanding of the details of the present invention. Additionally, various specific details have been given to provide a general understanding of embodiments of the present invention. However, one of ordinary skill in the relevant art will recognize that embodiments of the present invention may be practiced without one or more of the specific details, or with other devices, systems, components, methods, materials, parts, etc. In other instances, well-known structures, materials, or operations have not been shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

[0091] Accordingly, while the present invention has been described herein with reference to its specific embodiments, modifications, various changes and substitutions are also within the above disclosure, and it should be understood that in some instances, some features of the present invention will be employed without corresponding use of other features, without departing from the scope and spirit of the claimed invention. Therefore, many modifications may be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims or to the specific embodiments disclosed as the best mode contemplated for carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the present invention will be determined only by the appended claims.

Claims

1. An air spring air chamber connection structure, characterized in that: include: An air chamber housing, the air chamber housing comprising a connecting plate, and the connecting plate is provided with a through hole; A bolt, the bolt being used to pass through the through hole from the inner side of the air chamber housing; Among them, a section of the through hole close to the inner side of the connecting plate constitutes a first welding area, a section of the screw rod of the bolt close to the head of the bolt constitutes a first welding portion, the inner diameter of the first welding area gradually decreases from the inner side of the air chamber shell to the outer side of the air chamber shell, and the outer diameter of the first welding portion gradually decreases from the inner side of the air chamber shell to the outer side of the air chamber shell.

2. The air spring air chamber connection structure according to claim 1, characterized in that: An annular sealing unit is arranged on one side of the head of the bolt close to the screw rod.

3. The air spring chamber connection structure according to claim 2, characterized in that: The annular sealing unit is a second welding portion, and the second welding portion is continuously arranged around the axis of the bolt.

4. The air spring air chamber connection structure according to claim 3, characterized in that: The second welding portion is an annular convex rib, and the cross-sectional width of the annular convex rib gradually decreases from a position far away from the connecting plate to a position close to the connecting plate.

5. A gas chamber connection structure welding device, characterized in that: Used for welding the air chamber connection structure according to any one of claims 3 to 4, the air chamber connection structure welding device comprises: a first electrode, conductively connected to the bolt; a second electrode, conductively connected to the connection plate; The first electrode is pressed against the head portion so that the first welding portion fits the first welding area, and the head portion fits the connecting plate.

6. The gas chamber connection structure welding device according to claim 5, characterized in that: The second electrode is a hollow sleeve structure, the hollow portion of the hollow sleeve structure is used to accommodate the screw portion of the bolt passing through the connecting plate, the hollow sleeve structure is spaced apart from the screw, and one end of the hollow sleeve structure is pressed against the outer side of the connecting plate.

7. The gas chamber connection structure welding device according to claim 5, characterized in that: The first electrode has a greater resistance than the second electrode.

8. A method for welding an air chamber connection structure, characterized in that: The gas chamber connection structure welding device as claimed in any one of claims 5 to 7 comprises the following steps: Conductively connecting the first electrode to the bolt, and conductively connecting the second electrode to the connecting plate; Passing a first current to make the first welding portion and the first welding area reach a critical melting temperature; Passing a second current, and driving the first electrode to press against the head to fuse the first welding portion with the first welding area; A third section of current is supplied, and the first electrode is kept pressed against the head to keep the welding pool between the first welding part and the first welding area stable.

9. A method for welding an air chamber connection structure according to claim 8, characterized in that: The current value of the second current segment is 1.2-1.5 times the current value of the first current segment, and the current value of the first current segment is equal to the current value of the third current segment.

10. A method for welding an air chamber connection structure according to claim 8, characterized in that: During the process of passing the third stage current, the second welding portion contacts the inner side of the connecting plate for welding to form a seal.

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