Mechanical sealing element and connecting system

Abstract

The utility model provides a mechanical sealing element and a connecting system, the provided mechanical sealing element is used for sealing and connecting a workpiece, the hardness of the workpiece is smaller than that of the mechanical sealing element, and the mechanical sealing element comprises a head part, a rod part and a flange part connected between the head part and the rod part; the end face, facing the rod part, of the flange part is concaved inwards in the axial direction to form two annular groove parts, and the inner diameters of the two annular groove parts are sequentially increased from the axis of the flange part to the outer side edge of the flange part. The flange part faces the rod part, and the end face, located between the two annular groove parts, of the flange part protrudes outwards in the axial direction to form an annular protrusion. When the mechanical sealing piece is connected with a workpiece in a sealing mode, a sealing ring or sealant does not need to be additionally coated, the sealing face of the mechanical sealing piece and the workpiece can directly form an excellent mechanical sealing structure, and the sealing effect is continuous.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and in particular relates to a mechanical seal and a connection system. Background Art

[0002] Fasteners are also called standard parts in the market. They are a general term for a type of mechanical parts used to fasten two or more parts (or components) into a whole. There are many types of fasteners with different performances. They are highly standardized, serialized, and universal, and are the most widely used mechanical basic parts. With the vigorous development of new energy projects (such as new energy vehicles), the sealing performance of fasteners is increasingly emphasized. At present, in order to achieve the corresponding sealing effect, most of them adopt the method of applying sealant on the sealing surface of the fastener, but the application of sealant undoubtedly increases the overall manufacturing process of the workpiece, which is not conducive to controlling its production cost; in addition, when the workpiece is connected by fasteners, the use of sealing rings is used to achieve the sealing effect after connection, but the addition of sealing rings adds a process of assembling parts (sealing rings) to the overall production of the workpiece, and also increases the final production cost. Utility Model Content

[0003] In view of the above-mentioned problems existing in the prior art, the main purpose of the utility model is to provide a mechanical seal and a connection system. The provided mechanical seal does not need to use a sealing ring or apply sealant when sealing and connecting workpieces. Its sealing surface can directly form an excellent mechanical sealing structure with the workpiece to achieve a continuous sealing effect.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] The utility model provides a mechanical seal, which is used for sealing and connecting workpieces, wherein the hardness of the workpiece is less than that of the mechanical seal, and the mechanical seal comprises a head, a rod and a flange connected between the head and the rod;

[0006] The flange portion is axially inwardly recessed with two annular grooves on the end surface facing the rod portion, and the inner diameters of the two annular grooves increase sequentially from the axis of the flange portion to the outer edge of the flange portion;

[0007] The end surface of the flange portion facing the rod portion and located between the two annular groove portions protrudes outwardly along the axial direction to form an annular protrusion.

[0008] As a further description of the above technical solution, during the process of sealing connection between the mechanical seal and the workpiece, the tip of the annular protrusion facing away from the flange portion fits the workpiece before the bottom wall of the annular groove portion;

[0009] The groove bottom wall of the annular groove portion fits against the workpiece before the flange portion faces the end surface of the rod portion.

[0010] As a further description of the above technical solution, the axial cross-section of the annular protrusion is in the shape of a spike, and the tip thereof is axially away from the flange portion and has a rounded corner.

[0011] As a further description of the above technical solution, the circumferential cross-section of each of the annular groove portions is in the shape of an arc.

[0012] As a further description of the above technical solution, the head, the rod and the flange are integrally connected.

[0013] As a further description of the above technical solution, the outer wall of the rod is formed with threads.

[0014] As a further description of the above technical solution, the radial cross-section of the head includes but is not limited to a hexagonal shape.

[0015] The utility model also provides a connection system, the connection system comprising:

[0016] A workpiece, wherein the workpiece is provided with a through hole;

[0017] A structure, wherein the structure is provided with a connecting portion;

[0018] A mechanical seal, wherein the hardness of the mechanical seal is greater than that of the workpiece; the mechanical seal comprises a head, a rod, and a flange connected between the head and the rod; wherein,

[0019] The flange portion is axially inwardly recessed with two annular grooves on the end surface facing the rod portion, and the inner diameters of the two annular grooves increase sequentially from the axis of the flange portion to the outer edge of the flange portion;

[0020] The end surface of the flange portion facing the rod portion and located between the two annular groove portions protrudes outwardly along the axial direction to form an annular protrusion;

[0021] The rod portion is inserted into the through hole from a side of the workpiece away from the structure, and one end of the rod portion passing through the through hole is detachably connected to the connecting portion of the structure;

[0022] The end surfaces of the annular protrusion, the annular groove and the flange facing the workpiece, and the end surface of the structure facing the workpiece are all in contact with the workpiece.

[0023] As a further description of the above technical solution, in the process that the rod portion of the mechanical seal passes through the through hole of the workpiece and is connected to the connecting portion of the structure, the tip of the annular protrusion facing away from the flange portion fits the workpiece before the bottom wall of the annular groove portion;

[0024] The groove bottom wall of the annular groove portion fits against the workpiece before the flange portion faces the end surface of the rod portion.

[0025] By means of the above technical solution, the outstanding effects of the utility model are:

[0026] The mechanical seal provided by the utility model comprises a head, a rod and a flange connected between the head and the rod; the end face of the flange facing the rod is axially inwardly concave with two annular grooves, and the inner diameters of the two annular grooves increase in sequence from the axis of the flange to the outer edge of the flange; the end face of the flange facing the rod and located between the two annular grooves is axially outwardly protruded to form an annular protrusion, so that in the process of clamping and connecting the workpiece using the mechanical seal and the structure adapted thereto and applying a pre-tightening force of a preset size to the mechanical seal, since the hardness of the workpiece is less than that of the mechanical seal, the annular protrusion will deviate from the method The top of the flange first squeezes the part of the workpiece facing it, so that a groove will gradually form on the surface of the workpiece for the annular protrusion to be embedded in to form the first sealing wall; as the preload force continues to be applied, the annular protrusion will continue to squeeze the workpiece, causing the part of the workpiece material located at the periphery of the annular protrusion to continue to deform and flow into the annular groove on both sides of the radial inner and outer sides of the annular protrusion, thereby forming the second sealing wall; the preload force continues to be applied, and the distance between the end face of the flange facing the rod and the end face of the workpiece facing the flange gradually decreases, and finally the end face of the flange facing the rod and except for the annular protrusion and the annular groove will also fit with the workpiece, thereby forming the third sealing wall. As a result, an excellent mechanical sealing structure is finally formed between the mechanical seal and the workpiece to maintain the sealing effect between the two, and there is no need to set a sealing ring between the flange and the workpiece or to apply sealant on the end face of the flange facing the rod. There is no need to use redundant sealing elements, and the connection system formed by the overflow and contamination of redundant adhesive is also avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of a mechanical seal in an embodiment of the utility model;

[0028] Figure 2 It is a partial cross-sectional view of the flange portion in the embodiment of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the connection system in the embodiment of the utility model.

[0030] Description of Figure Numbers:

[0031] 1. Mechanical seal; 11. Head; 12. Rod; 13. Flange; 2. Workpiece; 21. Through hole; 3. Annular groove; 4. Annular protrusion; 5. Thread; 6. Structure; 61. Connecting part. Detailed implementation manners

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "middle", "lower", "inner", "outer", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The following will describe its implementation manners according to the overall structure of the present invention.

[0034] Please refer to Figures 1 to 2 , the present invention discloses a mechanical seal 1. The disclosed mechanical seal 1 is used for sealing and connecting a workpiece 2. The hardness of the workpiece 2 is less than that of the mechanical seal 1. The mechanical seal 1 includes a head 11, a rod portion 12, and a flange portion 13 connected between the head 11 and the rod portion 12;

[0035] Two annular groove portions 3 are axially recessed inwardly on the end surface of the flange portion 13 facing the rod portion 12. The inner diameters of the two annular groove portions 3 increase sequentially from the axis of the flange portion 13 to the outer edge of the flange portion 13;

[0036] The end surface of the flange portion 13 facing the rod portion 12 and located between the two annular groove portions 3 projects axially outward to form an annular protrusion 4.

[0037] In the above-mentioned setting, the mechanical seal 1 still includes a head 11, a rod 12 and a flange 13 connected between the head 11 and the rod 12 like a conventional seal; the difference is that the flange 13 is axially inwardly recessed with two annular grooves 3 on the end face facing the rod 12, and the inner diameters of the two annular grooves 3 increase sequentially from the axis of the flange 13 to the outer edge of the flange 13, and at the same time, the end face of the flange 13 facing the rod 12 and located between the two annular grooves 3 protrudes axially outward to form an annular protrusion 4, so that when the mechanical seal 1 and the structure 6 adapted thereto are used to clamp and connect the workpiece 2 and apply a preset preload force to the mechanical seal 1, since the hardness of the workpiece 2 is less than that of the mechanical seal 1, it will cause The annular protrusion 4 first squeezes the part of the workpiece 2 facing it with its top facing away from the flange portion 13, so that a groove is gradually formed on the surface of the workpiece 2 for the annular protrusion 4 to be embedded in, thereby forming a first sealing wall; as the preload force continues to be applied, the annular protrusion 4 continues to squeeze the workpiece 2, so that part of the material of the workpiece 2 located at the periphery of the annular protrusion 4 continues to deform and flow into the annular groove portions 3 on the radial inner and outer sides of the annular protrusion 4, thereby forming a second sealing wall; as the preload force continues to be applied, the distance between the end face of the flange portion 13 facing the rod portion 12 and the end face of the workpiece 2 facing the flange portion 13 gradually decreases, and finally the end face of the flange portion 13 facing the rod portion 12 except the annular protrusion 4 and the annular groove portion 3 will also fit with the workpiece 2, thereby forming a third sealing wall. As a result, an excellent mechanical sealing structure is finally formed between the mechanical seal 1 and the workpiece 2 to maintain the sealing effect between the two. There is no need to set a sealing ring between the flange 13 and the workpiece 2 or to apply sealant on the end surface of the flange 13 facing the rod 12. No unnecessary sealing elements are used, and the connection system is avoided from being polluted by excess glue overflow.

[0038] See also Figure 2 and Figure 3, specifically, in this embodiment, during the process of the sealed connection between the mechanical seal 1 and the workpiece 2, the tip of the annular protrusion 4 facing away from the flange portion 13 comes into contact with the workpiece 2 prior to the bottom wall of the annular groove portion 3. Since the hardness of the workpiece 2 is low, as the pre-tightening force continues to be applied, the tip of the annular protrusion 4 in contact with the workpiece 2 will extrude a groove around the workpiece 2. This groove fits the shape of the annular protrusion 4, thus jointly forming the first sealing wall. As the pre-tightening force continues to be applied, the workpiece 2 continues to be compressed and deformed, so that a part of the material of the workpiece 2 located at the periphery of the annular protrusion 4 will flow into the annular groove portions 3 on both the inner and outer sides of the radial direction of the annular protrusion 4 until it is deformed into a convex portion that fits the bottom wall and the side wall of the annular groove portion 3, forming the second sealing wall. As the pre-tightening force continues to be applied, the distance between the end face of the flange portion 13 facing the rod portion 12 and the end face of the workpiece 2 facing the flange portion 13 gradually decreases. Eventually, the end face of the flange portion 13 facing the rod portion 12 and excluding the annular protrusion 4 and the annular groove portion 3 will also come into contact with the workpiece 2, thus forming the third sealing wall.

[0039] Specifically, in this embodiment, the axial cross-section of the annular protrusion 4 is in the shape of a spike, and its tip faces away from the flange portion 13 in the axial direction and is rounded. The purpose is to facilitate applying force to the end face of the workpiece 2 facing the flange portion 13 through the annular protrusion 4, so that while the workpiece 2 deforms and flows, it also avoids piercing the surface of the workpiece 2. Due to other external influences such as vibration in the later stage, it is easy for the workpiece 2 to develop cracks starting from the contact point with the tip of the annular protrusion 4, resulting in sealing failure.

[0040] Specifically, in this embodiment, the circumferential cross-section of each annular groove portion 3 is in an arc shape, making it easier for the flowing material of the workpiece 2 to flow into the annular groove portion 3 to form the second sealing wall, and there are no tips or right angles, so the sealing wall is maintained more durably.

[0041] Specifically, in this embodiment, the head 11, the rod portion 12, and the flange portion 13 are integrally connected, and it can be directly formed by cold heading process, and then the thread 5 on the outer wall of the rod portion 12 is formed by tapping.

[0042] Specifically, in this embodiment, the radial cross-section of the head 11 is hexagonal. Of course, in other embodiments, the radial cross-section of the head 11 can also be other shapes.

[0043] Please refer to Figures 1 to 3 , specifically, the present utility model also discloses a connection system, and the disclosed connection system includes:

[0044] A workpiece 2, and the workpiece 2 (such as an aluminum plate) is provided with a through hole 21;

[0045] Structural body 6, the structural body 6 is provided with a connecting portion 61;

[0046] Mechanical seal 1; the hardness of the mechanical seal 1 is greater than that of the workpiece 2; the mechanical seal includes a head portion 11, a rod portion 12, and a flange portion 13 connected between the head portion 11 and the rod portion 12; wherein,

[0047] On the end face of the flange portion 13 facing the rod portion 12, two annular groove portions 3 are recessed axially inward, and the inner diameters of the two annular groove portions 3 increase in sequence from the axis of the flange portion 13 to the outer edge of the flange portion 13;

[0048] The end face of the flange portion 13 facing the rod portion 12 and located between the two annular groove portions 3 protrudes axially outward to form an annular protrusion 4;

[0049] The rod portion 12 of the mechanical seal 1 passes through the through hole 21 from the side of the workpiece 2 facing away from the structural body 6, and the end of the rod portion 12 passing through the through hole 21 is detachably connected to the connecting portion 61 of the structural body 6; the annular protrusion 4, the annular groove portions 3, the end face of the flange portion 13 facing the workpiece 2, and the end face of the structural body 6 facing the workpiece 2 are all in contact with the workpiece 2. The structural body 6 is, for example, a blind rivet nut, and the internal thread provided on the inner hole wall of the blind rivet nut is its connecting portion 61, so that it can be threadedly connected to the part of the rod portion 12 of the mechanical seal 1 passing through the workpiece 2.

[0050] Specifically, in this embodiment, during the process that the rod portion 12 of the mechanical seal 1 passes through the through hole 21 of the workpiece 2 and is connected to the connecting portion 61 of the structure 6, the tip of the annular protrusion 4 facing away from the flange portion 13 contacts the workpiece 2 prior to the bottom wall of the annular groove portion 3, and the bottom wall of the annular groove portion 3 contacts the workpiece 2 prior to the end face of the flange portion 13 facing the rod portion 12. More specifically, after the tip of the annular protrusion 4 facing away from the flange portion 13 contacts the workpiece 2 prior to the bottom wall of the annular groove portion 3, due to the low hardness of the workpiece 2, with the continuous application of the pre-tightening force, the tip of the annular protrusion 4 contacting the workpiece 2 will extrude a groove on the workpiece 2, and the groove is adapted to the shape of the annular protrusion 4, thereby jointly forming the first sealing wall; when the pre-tightening force continues to be applied, the workpiece 2 continues to be deformed under pressure, so that part of the material of the workpiece 2 located at the periphery of the annular protrusion 4 will flow into the annular groove portions 3 on both the inner and outer sides of the radial direction of the annular protrusion 4 until it is deformed into a convex portion adapted to and contacting the bottom wall and the side wall of the annular groove portion 3, forming the second sealing wall; when the pre-tightening force continues to be applied, the distance between the end face of the flange portion 13 facing the rod portion 12 and the end face of the workpiece 2 facing the flange portion 13 gradually decreases, and finally the end face of the flange portion 13 facing the rod portion 12 and excluding the annular protrusion 4 and the annular groove portion 3 will also contact the workpiece 2, thereby forming the third sealing wall.

[0051] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any changes, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mechanical seal for sealingly connecting a workpiece, wherein the hardness of the workpiece is less than that of the mechanical seal, characterized in that, The mechanical seal comprises a head, a stem and a flange connected between the head and the stem; The flange portion is axially inwardly recessed with two annular grooves on the end surface facing the rod portion, and the inner diameters of the two annular grooves increase sequentially from the axis of the flange portion to the outer edge of the flange portion; The end surface of the flange portion facing the rod portion and located between the two annular groove portions protrudes outwardly along the axial direction to form an annular protrusion.

2. The mechanical seal according to claim 1, wherein During the process of sealing connection between the mechanical seal and the workpiece, the tip of the annular protrusion facing away from the flange portion fits the workpiece before the bottom wall of the annular groove portion; The groove bottom wall of the annular groove portion fits against the workpiece before the flange portion faces the end surface of the rod portion.

3. The mechanical seal according to claim 1, characterized in that, The axial cross section of the annular protrusion is in the shape of a spike, and the tip thereof is axially away from the flange portion and has a rounded corner.

4. The mechanical seal according to claim 1, characterized in that, The circumferential cross section of each annular groove portion is in the shape of an arc.

5. The mechanical seal according to claim 1, characterized in that, The head, the rod and the flange are connected in one piece.

6. The mechanical seal according to claim 1, wherein, The outer wall of the rod is formed with threads.

7. The mechanical seal according to claim 1, characterized in that, The radial cross-section of the head includes, but is not limited to, a hexagonal shape.

8. A connection system, characterized in that, include: A workpiece, wherein the workpiece is provided with a through hole; A structure, wherein the structure is provided with a connecting portion; A mechanical seal, wherein the hardness of the mechanical seal is greater than that of the workpiece; the mechanical seal comprises a head, a rod, and a flange connected between the head and the rod; wherein, The flange portion is axially inwardly recessed with two annular grooves on the end surface facing the rod portion, and the inner diameters of the two annular grooves increase sequentially from the axis of the flange portion to the outer edge of the flange portion; The end surface of the flange portion facing the rod portion and located between the two annular groove portions protrudes outwardly along the axial direction to form an annular protrusion; The rod portion is inserted into the through hole from a side of the workpiece away from the structure, and one end of the rod portion passing through the through hole is detachably connected to the connecting portion of the structure; The end surfaces of the annular protrusion, the annular groove and the flange facing the workpiece, and the end surface of the structure facing the workpiece are all in contact with the workpiece.

9. The connection system according to claim 8, wherein, In the process that the stem of the mechanical seal passes through the through hole of the workpiece and is connected to the connecting portion of the structure, the tip of the annular protrusion facing away from the flange portion fits the workpiece before the bottom wall of the annular groove portion; The groove bottom wall of the annular groove portion fits against the workpiece before the flange portion faces the end surface of the rod portion.

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