Sealing rivet stud without gluing bolt

Abstract

The utility model provides a sealing rivet stud which does not need to be glued on a bolt, and comprises a shell part, and a head lower groove for accommodating an O-shaped sealing ring is arranged below a top flange; and the bolt coaxially penetrates through the through hole of the shell part, and after assembly, the press-fit part is located in the shell part and is in tight press fit with the inner wall of the shell part to form metal-metal connection. According to the utility model, glue is replaced by the structure of the pressing part at the part where the bolt is connected with the shell part, and after the bolt and the shell part are pressed, the connection between metals is realized, gas or liquid is blocked, the sealing effect is achieved, and the rotation condition caused by different materials can be effectively reduced on the basis of improving the connection strength; besides, the shell part is matched with the lower head groove and the O-shaped sealing ring, so that the sealing requirement between the lower surface of the flange of the shell part and the plate can be met without gluing, metal and metal are connected, the connection strength is high, and the anti-rotation performance is high.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, in particular to the technical field requiring airtightness or watertightness, and specifically is a sealing rivet stud which does not require glue to be applied on the bolt. Background Art

[0002] The application of sealing rivet studs in automotive parts can provide excellent sealing performance and fastening effect. On the basis of ensuring that liquids and gases will not leak or seep out, sealing rivet studs can provide additional support and fixation in parts such as car doors, roofs, battery packs and trunks, making the car body more solid and stable.

[0003] However, after the rivet nut and the plate are butt-jointed, glue is usually applied under the flange of the rivet nut to prevent water leakage between the two. This is used to prevent water leakage between the flange and the plate. However, the presence of glue makes it impossible to form a metal-to-metal connection between the rivet nut and the plate, resulting in low connection strength and prone to rotation problems. In addition, the head thickness after riveting is not easy to control.

[0004] In addition, the lines on the studs are currently spiral, just like climbing a mountain, so air is more likely to pass through the spiral lines. In order to prevent water leakage between the rivet nut and the bolt, glue is usually applied to the bolt after the rivet nut and the bolt are connected. The glue application position is the position where the bolt and the shell are pressed together. It is found in use that, first of all, it is not easy to apply glue on the bolt, the batch difference is large, and the processing efficiency is low; secondly, after the bolt is glued, the force required for riveting is greater, which is not good for the riveting machine and is prone to dimensional variation due to the need for greater riveting force; similarly, metal-to-metal connection cannot be achieved, the connection strength is low, and rotation problems are prone to occur; another point is that glue is expensive, and the process of adding glue is not very stable, resulting in high costs.

[0005] A self-piercing rivet bolt with a self-locking function is disclosed in the prior art. Patent No. CN209800486U discloses a self-piercing rivet bolt with a self-locking function, including a riveted portion and a threaded portion; the riveted portion includes a self-piercing connecting section, a barb section for increasing the axial thrust, and a knurled section with a rotation-stopping function, which are arranged in sequence along the axial direction; the self-piercing connecting section is a tapered shaft, and its direction gradually decreases toward the threaded portion; the barb section is located on the small end face of the self-piercing connecting section, is a column, and has a serrated barb structure in the circumferential direction; the knurled section is located at one end of the barb section, is a column, and has a diameter greater than the diameter of the barb section; the knurled section has a toothed structure in the circumferential direction; the threaded portion is arranged at the other end of the knurled section along the axial direction. The device can solve the problem of low interlocking strength in the prior art and can also provide new connection points, and has the characteristics of simple structure and good versatility. Although a structure with multiple rows of bosses and bosses with knurling is disclosed, the effects are different and the sealing effect is not disclosed. The annular groove and the sealing effect brought by the annular groove are not disclosed, and the other structures are also not disclosed.

[0006] A self-clinching bolt is disclosed in the prior art. Patent No. CN216691788U discloses a self-clinching bolt, including a head and a screw. The side wall of the head is provided with an embedding portion, and the embedding portion is suitable for the plate to be embedded in the embedding portion when the plate is riveted. The head includes a flange end and a boss connected to the flange end. The side wall of the boss is longitudinally provided with knurled teeth, and the knurled teeth are suitable for interference fit with the sheet metal hole of the plate. The boss is provided with a groove toward one end of the screw, and the length of the knurled teeth is less than the thickness of the connected plate. Common self-clinching bolts have general riveting performance and can only be used in low-strength connection environments. The utility model has a higher connection strength and is suitable for higher-strength riveting environments; although the thread and the structure with knurling on the thread are disclosed, the effects are different, and the sealing effect is not disclosed; and the annular groove and the sealing effect brought by the annular groove are not disclosed, and the remaining structures are not disclosed.

[0007] A detachable screw-on rivet bolt is disclosed in the prior art. Patent number CN111749964B discloses a detachable screw-on rivet bolt, which belongs to the technical field of building connection. It includes a bolt sleeve and a screw rod that is inserted into the bolt sleeve and can be screwed into the bolt sleeve. The inner side wall of the bolt hole of the bolt sleeve is provided with an internal thread section and a support convex portion at one end close to the bearing platform. The support convex portion is radially opened outward from the bolt sleeve when the screw rod is screwed. The end of the external thread section away from the power head is also provided with a driving rod section. The bottom of the driving rod section is provided with a screw cone surface that can be screwed into the support convex portion to open it. The technical effect of resolving the problem that the bolt sleeve can be restored and disassembled after being deformed and fixed is disclosed. Although the structure of the bolt and the housing, as well as the vertical knurling, are disclosed, the effects are different, and the sealing effect is not disclosed; the annular groove and the sealing effect brought by the annular groove are not disclosed, and the remaining structures are not disclosed. Summary of the invention

[0008] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a sealing rivet stud that does not require glue to be applied on the bolt, so as to solve the difficulties of the prior art.

[0009] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a sealing rivet stud which does not require glue to be applied on the bolt, comprising:

[0010] A housing part 1, wherein a vertical through hole 2 is formed in the housing part 1, and a top flange 3 is formed at the top opening of the housing part 1 and extends horizontally outward, and a lower surface of the top flange 3 is provided with a circle of under-head grooves 4 for accommodating an O-ring 7;

[0011] Bolt 5, the through hole 2 of the housing part 1 is coaxially provided with the bolt 5, and the bolt 5 is coaxially provided with a screw rod 51, a pressing part 52 and a bolt head 53 in sequence along the top flange 3 of the housing part 1 in a downward direction;

[0012] After assembly, the bolt head 53 is against the end of the shell part 1 away from the top flange 3, the pressing part 52 is located in the shell part 1 and is tightly pressed with the inner wall of the shell part 1 to form a metal-to-metal connection, and the screw rod 51 extends coaxially out of the top flange 3.

[0013] Furthermore, the outer diameter of the bolt head 53 is greater than the inner diameter of the through hole 2 of the housing part 1 .

[0014] In the present technical solution, the structure of the pressing part 52 is used to replace the glue at the part where the bolt 5 and the shell part 1 are connected. After the two are pressed together, the connection between metal and metal is realized, which blocks the gas or liquid and has a sealing effect, replacing the use of expensive glue. It can also effectively reduce the occurrence of rotation caused by different materials while improving the connection strength.

[0015] According to a preferred embodiment, the bolt 5 comprises:

[0016] Screw 51;

[0017] A pressing part 52, wherein a plurality of non-helical annular grooves 54 are arranged in parallel vertically along the axial direction of the bolt 5 at equal intervals, and independent air passages 55 are formed between adjacent non-helical annular grooves 54;

[0018] Vertical knurling 56, vertical knurling 56 is provided on the outer sides of the plurality of annular grooves 54 near the side of the screw rod 51 in a direction parallel to the axial direction, and the annular groove 54 near the side of the bolt head 53 is an aperture setting;

[0019] The bolt head 53 is disposed under the housing part 1 .

[0020] In the present technical scheme, the conventional method of adding glue after installation for sealing and fastening is changed to a structure in which a pressing part 52 corresponding to the sealing pressing of the shell part 1 is opened on the bolt 5. Specifically, since the pressing part 52 adopts a structure combining a ring 54 and an airway 55, wherein a plurality of parallel and equidistant annular grooves 54 are arranged, the structure does not adopt conventional continuous and inclined threads, and thus does not produce a mountain path similar to a mountain path. Gas or liquid can flow from the root of the thread from top to bottom, which requires the addition of sealant and easily causes leakage. Since there are circles of parallel annular grooves 54, there is an independent space between each annular groove 54, that is, the airway 55. The liquid or gas must break through layer by layer. After pressing, the airway 55 that is difficult to break through replaces the effect of the sealant, and the air or gas will be blocked between the two rings, reducing the chance of passing through all the rings, thus achieving the purpose of sealing.

[0021] Furthermore, a chamfer 57 is provided at one end of the screw rod 51 away from the bolt head 53. The chamfer 57 is arranged in a truncated cone shape, which can quickly introduce accessories while avoiding damage to the inner wall, thereby improving installation efficiency and reducing production costs.

[0022] According to a preferred embodiment, the vertical knurling patterns 56 on adjacent annular grooves 54 are staggered.

[0023] According to a preferred embodiment, at least one circle of the annular groove 54 near the bolt head 53 is not provided with vertical knurling 56 .

[0024] Furthermore, the vertical knurling 56 is not required on the circle of the annular groove 54 close to the bolt head 53 or the last two circles.

[0025] In the present technical solution, it can be seen from the structural diagram after the housing part 1 and the bolt 5 are installed that in order to achieve the sealing effect, the compression effect between the annular groove 54 and the inner wall of the housing part 1 is adopted. Therefore, in terms of structure, a flat structure should be adopted on the circle of the annular groove close to the bolt head 53 or the last two circles, so that deformation can be achieved after the pressure is applied, and the sealing interface between the metal and the metal becomes tighter, which is the guarantee for achieving the sealing effect;

[0026] The use of vertical knurling on the annular groove can enhance the pressing strength between the inner surface of the housing part 1 and the bolt 5 on the basis of increasing the friction force on the workpiece surface, and at the same time prevent the bolt 5 from rotating during use after installation;

[0027] In addition, the use of staggered vertical knurling 56 on adjacent annular grooves 54 can further improve the sealing performance. While ensuring the anti-rotation effect of the bolt 5, the sealing purpose also needs to be taken into account. The vertical knurling 56 is staggered on the upper and lower annular grooves 54, which can effectively increase the complexity of the gas or liquid passage, thereby improving the sealing performance, and can further prevent the relative rotation between the shell part 1 and the bolt 5.

[0028] According to a preferred embodiment, the cross-section of the vertical knurling 56 is the same as the cross-section of the thread, or is a triangle or a trapezoid.

[0029] In the present technical solution, the friction between the bolt 5 and the shell part 1 can be increased by processing the vertical knurling 56 on the bolt 5, thereby improving the anti-loosening ability. On the basis of the vertical knurling 56 forming a tighter connection between the bolt 5 and the shell part 1, reducing the risk of loosening and improving the stability of the connection, it is only necessary to ensure that there are layers of air ducts 55 between adjacent annular grooves 54 to ensure the sealing. Therefore, the cross-section of the vertical knurling 56 can conform to the structure of the thread, or its cross-section can be set to be triangular or trapezoidal in order to increase the strength of the annular groove 54.

[0030] According to a preferred embodiment, the outer diameter of the air passage 55 is smaller than or equal to the outer diameter of the annular groove 54 .

[0031] Furthermore, the vertical distance between the annular grooves 54 in the pressing portion 52 is equal to the pitch of the external thread on the screw rod 51, which is convenient for processing.

[0032] Furthermore, the maximum outer diameter of the annular groove 54 of the riveting portion is the same as the outer diameter of the external thread of the screw rod 51 .

[0033] In the present technical solution, the air channel 55 is formed by grooving the bolt 5, so the air channel 55 is in the form of a structure recessed in the annular groove 54. Since part of the air channel 55 is located below the deformation zone 8 of the shell part 1, the diameter of the annular groove 54 and the spacing of the annular groove 54 are appropriately reduced after riveting, which can effectively reduce the gap between the shell part 1 and the bolt 5, thereby forming a tighter connection between the bolt 5 and the shell part 1 and improving the sealing effect and anti-rotation capability.

[0034] According to the preferred solution, the through hole 2 is integrally provided with an upper inner hole 21 and a lower inner hole 22 in sequence along the top flange 3 in a vertical downward direction;

[0035] The inner diameter of the upper inner hole 21 is greater than the outer diameter of the screw rod 51 .

[0036] In the present technical solution, the shell part 1 serves as a direct connection with the plate, and the sealing and anti-rotation between the shell part 1 and the bolt 5 must be handled well internally. For this reason, the structural setting of the through hole 2 is closely related to the structure of the bolt 5. The structure 21 of the upper inner hole facilitates the installation and introduction of the bolt 5, and is used for riveting deformation. The structure of the lower inner hole 22 facilitates pressing and docking with the pressing part 52. The chamfer on the lower inner hole 22 can improve the installation efficiency of the bolt 5, and can quickly introduce it while avoiding damage to the inner wall, thereby improving installation efficiency and reducing production costs.

[0037] According to the preferred embodiment, a groove 6 is provided on the outer wall of the shell part 1 below the top flange 3, and an O-ring is installed in the groove 6. When the shell part 1 is riveted and installed corresponding to the plate, the O-ring 7 on the groove 6 is embedded in the groove 4 under the action of pressure and the base material.

[0038] Furthermore, an O-ring 7 is embedded in the groove 4 under the head.

[0039] According to a preferred embodiment, a plurality of grooves 6 are arranged in an annular shape along the outer circumference of the housing part 1 at equal intervals, and the plurality of grooves 6 are connected to form an annular shape.

[0040] In the present technical solution, the recess 4 under the head of the shell part 1 is provided to provide a space for embedding and installing the O-ring 7. When the shell part 1 and the plate are installed by riveting, the two are sealed by the O-ring, so that the flange lower surface of the shell part 1 can achieve the sealing requirement with the plate without applying glue. In addition, the above structure also realizes the metal-to-metal connection between the lower surface of the top flange 3 and the plate, with high connection strength and strong anti-rotation performance.

[0041] An unconnected groove 6 is also provided in the shell part 1 immediately below the groove 4 under the head. Here, the multiple grooves 6 are still annular in structure after being connected, but the spaced portions can be used to clamp the O-ring 7, thereby preventing the sealing ring from falling off during transportation after production and assembly.

[0042] According to a preferred embodiment, knurling 9 is provided on the outer circumference of the deformation zone 8 of the housing part 1 below the top flange 3 .

[0043] In the present technical solution, knurling is added to the outer side of the deformation zone 8 of the shell part 1 to change the stress state of the riveted deformation zone, making the stress distribution more uniform, thereby improving the fatigue resistance of the connection.

[0044] The utility model has the following beneficial effects:

[0045] (1) A structure that uses a series of parallel annular grooves and air passages to form a press-fitting part instead of a continuous thread installation followed by adding glue for sealing and tightening. Since there is an independent space between each annular groove, liquid or gas must break through layer by layer. Air or gas will be blocked between two rings, reducing the chance of passing through all the rings, thus achieving the purpose of sealing;

[0046] (2) Since no glue is needed, on the one hand, the cost is reduced, the production efficiency is improved, and the delivery time is shortened; on the other hand, it is user-friendly and does not require a large riveting force, which reduces the burden on the machine;

[0047] (3) The use of vertical knurling on the annular groove can increase the friction force on the workpiece surface, thereby enhancing the pressing strength between the inner surface of the housing part and the bolt, and at the same time prevent the bolt from rotating during use after installation;

[0048] (4) The shell part is provided with a groove under the head. When the shell part and the plate are installed by riveting, the two are sealed by an O-ring. As a result, the lower surface of the flange of the shell part can achieve the sealing requirement with the plate without the need for glue. In addition, a metal-to-metal connection is formed between the lower surface of the top flange and the plate, which has high connection strength and strong anti-rotation performance.

[0049] The best embodiment of the present invention will be described in more detail below in conjunction with the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 The display is a three-dimensional structural schematic diagram of the utility model;

[0051] Figure 2 The display is a front view of the utility model;

[0052] Figure 3 Shown is a cross-sectional view of the present utility model;

[0053] Figure 4 The figure shows the state of the utility model after riveting;

[0054] Figure 5 Shown is an enlarged schematic diagram of the three-dimensional structure of the bolt in the utility model;

[0055] Figure 6 Shown is a front view of the bolt in the utility model;

[0056] Figure 7 Shown is a top view of a bolt in the present utility model;

[0057] Figure 8 Shown is an enlarged schematic diagram of a local structure of a bolt in the utility model;

[0058] Description of symbols

[0059] 1. Shell parts; 2. Through hole, 21. Upper inner hole, 22. Lower inner hole; 3. Top flange; 4. Groove under the head; 5. Bolt, 51. Screw, 52. Pressing part, 53. Bolt head, 54. Annular groove, 55. Airway, 56. Vertical knurling, 57. Chamfer; 6. Groove; 7. O-ring; 8. Deformation zone; 9. Knurling. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solution and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0061] Compared with the embodiments shown in the drawings, feasible implementations within the scope of protection of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0062] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate quantity restrictions. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0063] The utility model provides a sealing rivet stud which does not require glue to be applied on the bolt, and is used in the sealing rivet stud. The utility model does not limit the position of the automobile installation parts, but the structure of the sealing rivet stud which does not require glue to be applied on the bolt is particularly suitable for automobile doors, roofs, battery packs and trunks.

[0064] In general, the sealing rivet stud that does not require glue to be applied on the bolt proposed by the present invention mainly includes a housing part 1 and a bolt 5. Figure 1 , which shows the arrangement relationship between the housing part 1 and the bolt 5.

[0065] In order to achieve the purpose of sealing and anti-rotation without applying glue on the bolt, and to solve the problem in the background technology that after the rivet nut and the plate are butted, water leakage between the two is avoided, glue is usually applied under the flange of the rivet nut to achieve and achieve the purpose of watertightness between the flange and the plate. However, the presence of glue makes it impossible to form a metal-to-metal connection between the rivet nut and the plate, the connection strength is low, and the problem of rotation is prone to occur, and the head thickness after riveting is not easy to control; in addition, the lines on the studs are currently spiral, just like climbing a mountain, so air is more likely to pass through the spiral lines. In order to achieve watertightness between the rivet nut and the bolt, after the rivet nut and the bolt are butt-jointed, glue is usually applied on the bolt, and the glue application position is the position where the bolt and the shell are pressed together. It is found in use that, firstly, it is not easy to apply glue on the bolt, the batch difference is large, and the processing efficiency is low; secondly, after the glue is applied on the bolt, the force required for press riveting is greater, It is not good for the riveting machine and is prone to dimensional variation due to the need for a larger riveting force. Similarly, metal-to-metal connection cannot be achieved, the connection strength is low, and rotation problems are prone to occur. Another point is that glue is very expensive, and the process of adding glue is not very stable, resulting in high costs. For this reason, in the technical solution provided in this embodiment, the structure of the pressing portion 52 is used to replace the glue at the part where the bolt 5 is connected to the shell part 1. After the two are pressed together, a metal-to-metal connection is achieved, which blocks the gas or liquid and has a sealing effect, replacing the use of expensive glue. It can also effectively reduce the occurrence of rotation caused by different materials while improving the connection strength. In addition, the shell part 1 adopts the combination of the under-head groove and the O-ring, so that the flange lower surface of the shell part does not need to be coated with glue to achieve the sealing requirements between the plate, which is also a metal-to-metal connection with high connection strength and strong anti-rotation performance.

[0066] Specifically, Figure 1-3As shown, a vertical and through hole 2 is opened in the shell part 1, and a bolt 5 is coaxially passed through the through hole 2 of the shell part 1. The bolt 5 is coaxially provided with a screw rod 51, a pressing part 52 and a bolt head 53 in sequence along the top flange 3 of the shell part 1 in the downward direction; after assembly, the bolt head 53 is abutted on the end of the shell part 1 away from the top flange 3, and the pressing part 52 is located in the shell part 1 and is tightly pressed with the inner wall of the shell part 1 to form a metal-to-metal connection.

[0067] It should be specifically explained that the structure of the pressing portion 52 can realize the sealing connection between the housing part 1 and the bolt 5. To this end, the bolt 5 provided in this embodiment includes a screw rod 51, a pressing portion 52 and a bolt head 53. Figure 3 As shown, the outer diameter of the bolt head 53 is larger than the inner diameter of the through hole 2 of the housing part 1. After installation, the bolt head 53 is against the bottom of the housing part 1, and the screw rod 51 coaxially extends out of the top flange 3. The end of the screw rod 51 away from the bolt head 53 is provided with a chamfer 57. The chamfer 57 is arranged in a truncated cone shape, which can quickly introduce the accessories while avoiding damage to the inner wall, thereby improving installation efficiency and reducing production costs.

[0068] Then, if Figure 5 and 6 As shown, a plurality of annular grooves 54 are arranged in parallel vertically along the axis of the bolt 5 at equal intervals in the pressing part 52, and independent air passages 55 are formed between adjacent annular grooves 54. After installation, the conventional continuous thread is installed and glue is added for sealing and fastening, and the structure of the pressing part 52 corresponding to the sealing pressing of the shell part 1 is changed to be used. Specifically, since the pressing part 52 adopts a structure of a combination of annular grooves 54 and air passages 55, wherein a plurality of annular grooves 54 are arranged in parallel and at equal intervals, the structure does not adopt the conventional continuous thread. The inclined thread will not produce a mountain path similar to a mountain path. Gas or liquid can flow from the root of the thread all the way from top to bottom, which requires the addition of sealant, and leakage problems are likely to occur. Since there are circles of parallel annular grooves 54, there is an independent space between each annular groove 54, that is, an airway 55. Liquid or gas must break through layer by layer. After pressing, the airway 55 that is difficult to break through replaces the effect of the sealant. Air or gas will be blocked between the two rings, reducing the chance of passing through all the rings, thus achieving the purpose of sealing.

[0069] In addition, if Figure 8As shown, a vertical knurling 56 is provided on the upper part of the annular groove 54 on the one circle near the bolt head 53 or the last two circles, and a vertical knurling 56 is provided on the outer side of the remaining annular groove 54 near the screw rod 51 in a direction parallel to the axial direction. The reason is that from the structural diagram after the housing part 1 and the bolt 5 are installed, it can be seen that in order to achieve the sealing effect, the pressing effect between the annular groove 54 and the inner wall of the housing part 1 is adopted. Therefore, in terms of structure, a flat structure should be adopted on the one circle near the bolt head 53 or the last two circles of the annular groove 54, so that deformation can be achieved after pressure is applied, and the sealing interface between metal and metal becomes tighter, which is a guarantee for achieving the sealing effect.

[0070] The use of vertical knurling on the annular groove 54 can enhance the pressing strength between the inner surface of the housing part 1 and the bolt 5 on the basis of increasing the friction force of the workpiece surface, and at the same time prevent the bolt 5 from rotating during use after installation;

[0071] On this basis, the vertical knurling 56 on adjacent annular grooves 54 is staggered to further improve the sealing performance. While ensuring the anti-rotation effect of the bolt 5, the sealing purpose also needs to be taken into account. The vertical knurling 56 on the upper and lower annular grooves 54 is staggered to effectively increase the complexity of the gas or liquid passage, thereby improving the sealing performance, and can further prevent the relative rotation between the shell part 1 and the bolt 5.

[0072] Preferably, in order to facilitate the formation of the annular groove 54 and the provision of the vertical knurling 56 in the process, on the one hand, the outer diameter of the air duct 55 is less than or equal to the outer diameter of the annular groove 54, and on the other hand, the cross-section of the vertical knurling 56 can conform to the structure of the thread, or in order to increase the strength of the annular groove 54, its cross-section can be set to be triangular or trapezoidal. It is mainly necessary to ensure that there are layers of air ducts 55 between adjacent annular grooves 54 to ensure the sealing.

[0073] As mentioned above, combined with Figure 3 and Figure 6 As shown, the through hole 2 is integrally provided with an upper inner hole 21 and a lower inner hole 22 in sequence along the top flange 3 in a vertical downward direction. The shell part 1 serves as a direct connection with the plate, and the sealing and anti-rotation between the through hole 2 and the bolt 5 must be handled well internally. For this reason, the structural setting of the through hole 2 is closely related to the structure of the bolt 5. The structure 21 of the upper inner hole facilitates the installation and introduction of the bolt 5, and is used for riveting deformation. The structure of the lower inner hole 22 facilitates pressing and docking with the pressing portion 52. The chamfer on the lower inner hole 22 can improve the installation efficiency of the bolt 5, and can quickly introduce it while avoiding damage to the inner wall, thereby improving installation efficiency and reducing production costs.

[0074] In addition, a top flange 3 is formed at the top opening of the housing part 1 and extends outward in a horizontal shape. The lower surface of the top flange 3 is provided with a circle of under-head grooves 4 for accommodating an O-ring 7. In this embodiment, the O-ring 7 is used to seal between the housing part 1 and the plate, thereby replacing the glue coating sealing effect between the bottom of the top flange and the plate.

[0075] Specifically, Figure 3 As shown, the recess 4 under the head of the shell part 1 is provided to provide a space for embedding and installing the O-ring 7. When the shell part 1 and the plate are installed by riveting, the two are sealed by the O-ring, so that the flange lower surface of the shell part 1 can achieve the sealing requirement with the plate without applying glue. In addition, the above structure also realizes the metal-to-metal connection between the lower surface of the top flange 3 and the plate, with high connection strength and strong anti-rotation performance.

[0076] An unconnected groove 6 is also provided in the shell part 1 immediately below the groove 4 under the head. Here, the multiple grooves 6 are still annular in structure after being connected, but the spaced portions can be used to clamp the O-ring 7, thereby preventing the sealing ring from falling off during transportation after production and assembly.

[0077] In addition, preferably, knurling is added to the outer side of the deformation zone 8 of the shell part 1 to change the stress state of the riveted deformation zone, so that the stress distribution is more uniform, thereby improving the fatigue resistance of the connection.

[0078] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A sealed rivet stud that does not require glue to be applied on the bolt, characterized in that: include: A housing part (1), wherein a vertical through hole (2) is formed in the housing part (1), a top flange (3) is formed at the top opening of the housing part (1) and extends horizontally outward, and a lower surface of the top flange (3) is provided with a circle of under-head grooves (4) for accommodating an O-ring (7); A bolt (5), wherein the bolt (5) is coaxially arranged in the through hole (2) of the housing part (1), and the bolt (5) is coaxially arranged in sequence along the top flange (3) of the housing part (1) in a downward direction with a screw rod (51), a pressing part (52) and a bolt head (53); After assembly, the bolt head (53) is disposed against an end of the housing part (1) away from the top flange (3), the pressing portion (52) is located inside the housing part (1) and is tightly pressed against the inner wall of the housing part (1) to form a metal-to-metal connection, and the screw rod (51) is coaxially extended out of the top flange (3).

2. The sealing rivet stud that does not require glue to be applied on the bolt according to claim 1 is characterized in that: The bolt (5) comprises: Screw (51); A pressing part (52), wherein a plurality of non-helical annular grooves (54) are arranged in parallel vertically along the axis of the bolt (5) at equal intervals, and independent air passages (55) are formed between adjacent non-helical annular grooves (54); Vertical knurling (56), wherein the outer sides of the plurality of annular grooves (54) on the side close to the screw rod (51) are provided with vertical knurling (56) in a direction parallel to the axial direction, and the annular groove (54) on the side close to the bolt head (53) is provided with an aperture; A bolt head (53), wherein the bolt head (53) is disposed under the housing part (1).

3. The sealing rivet stud that does not require glue to be applied on the bolt according to claim 2 is characterized in that: The vertical knurling patterns (56) on adjacent annular grooves (54) are arranged in a staggered manner.

4. The sealing rivet stud that does not require glue to be applied on the bolt according to claim 3 is characterized in that: No vertical knurling (56) is provided on at least one circle of the annular groove (54) close to one side of the bolt head (53).

5. The sealing rivet stud that does not require glue to be applied on the bolt according to claim 4 is characterized in that: The cross section of the vertical knurling (56) is the same as the cross section of the thread, or is a triangle or a trapezoid.

6. The sealing rivet stud that does not require glue to be applied on the bolt according to claim 5, characterized in that: The outer diameter of the air channel (55) is smaller than or equal to the outer diameter of the annular groove (54).

7. The sealing rivet stud that does not require glue to be applied on the bolt according to claim 6, characterized in that: The through hole (2) is integrally provided with an upper inner hole (21) and a lower inner hole (22) in sequence along the top flange (3) in a vertical downward direction; The inner diameter of the upper inner hole (21) is greater than the outer diameter of the screw (51); The inner diameter of the lower inner hole (22) is not greater than the outer diameter of the pressing portion (52).

8. The sealing rivet stud that does not require glue to be applied on the bolt according to claim 7, characterized in that: The outer wall of the shell part (1) below the top flange (3) is provided with a groove (6), and an O-ring is installed in the groove (6). When the shell part (1) is riveted and installed corresponding to the plate, the O-ring (7) on the groove (6) is embedded in the groove (4) under the action of pressure and the base material.

9. The sealing rivet stud that does not require glue to be applied on the bolt according to claim 8, characterized in that: A plurality of grooves (6) are arranged in an annular shape along the outer circumference of the shell part (1) at equal intervals, and the plurality of grooves (6) are connected to form an annular shape.

10. The sealing rivet stud that does not require glue to be applied on the bolt according to claim 9, characterized in that: The outer circumference of the deformation zone (8) of the shell part (1) below the top flange (3) is provided with knurling (9).

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