Sealing fastening bolt

Abstract

The utility model discloses a sealing fastening bolt, which belongs to the technical field of fasteners and comprises a head and a screw, a first annular groove and a second annular groove are respectively arranged on one side, facing the screw and far away from the screw, of the head, the first annular groove is communicated with the second annular groove through a connector, a pressing plate is slidably arranged in the first annular groove, and the pressing plate extends to form a stress protrusion. The stress protrusion extends into the second annular groove through the connecting opening, the first annular groove is provided with a sealing gasket making contact with the pressing plate, and the second annular groove is connected with a connecting piece pushing the stress protrusion. According to the sealing fastening bolt, the sealing effect of the bolt is improved, and the service life of the sealing gasket is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, and more particularly to a sealing fastening bolt. Background Art

[0002] Bolts are a type of fastener and the most commonly used mechanical connection method.

[0003] Bolts are generally used with nuts or bolt holes. However, there is a certain gap between the threads on the bolt and the threads of the nut or bolt hole due to the need for rotation. When the bolts are used in equipment that requires sealing, in order to prevent gas or liquid from leaking through the bolt holes of the equipment, a sealing ring is directly mounted on the bolt to improve the sealing.

[0004] However, when the bolt is rotating and the sealing ring is in contact with the equipment and the bolt, the sealing ring will be subjected to two forces in different rotation directions due to the relative rotation between the bolt and the equipment. This can easily damage the sealing ring and affect its service life.

[0005] Therefore, the present application provides a technical solution to solve this technical problem. Utility Model Content

[0006] In view of the deficiencies in the prior art, the present invention aims to provide a sealing fastening bolt.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A sealing fastening bolt includes a head and a screw rod, wherein the head is provided with an annular groove 1 and an annular groove 2 on the side facing the screw rod and away from the screw rod respectively, and the annular groove 1 and the annular groove 2 are connected by a connecting port, a pressure plate is slidingly arranged in the annular groove 1, and a force-bearing protrusion is extended from the pressure plate, and the force-bearing protrusion extends into the annular groove 2 through the connecting port, a sealing gasket in contact with the pressure plate is installed in the annular groove 1, and the annular groove 2 is connected to a connecting piece that pushes the force-bearing protrusion.

[0009] The utility model is further configured as follows: the connecting piece comprises a ring block, and the ring block is threadedly connected to two side walls of the ring groove through a thread.

[0010] The utility model is further configured as follows: the ring block is provided with a flange, and the flange extends to the side wall of the head.

[0011] The utility model is further configured as follows: the sealing gasket includes an inner ring and an outer ring, the inner ring and the outer ring are connected, and the inner ring and the outer ring are each formed with an inclined surface 1 on the side away from each other, and the ring groove 1 is provided with an inclined surface 2, and the inclination angle of the inclined surface 2 is consistent with that of the inclined surface 1.

[0012] The utility model is further configured as follows: a third inclined surface is provided at the position where the pressure plate and the sealing gasket contact each other, and the inclination angle of the third inclined surface is consistent with that of the first inclined surface.

[0013] The utility model is further configured as follows: the sealing gasket also includes a connecting piece, the inner ring and the outer ring are connected by the connecting piece, and a clearance groove is formed between the inner ring, the outer ring and the connecting piece.

[0014] In summary, the present invention has the following beneficial effects:

[0015] After the bolt is locked on the bolt hole of the object, rotate the ring block, and the ring block will push the force-bearing convex and pressure plate under the action of the thread, so that the pressure plate and the object will squeeze the sealing gasket, causing the inner ring and outer ring to deform under force, reducing the probability of gas and liquid leakage from the bolt hole of the object and improving the sealing effect of the bolt.

[0016] During the bolt locking process, the torsional force on the gasket from the surface of the object and the head is reduced, so that the gasket is protected and the sealing life of the gasket is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the head of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure between the head and the ring block of the utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0021] In the figure: 1. Head; 2. Screw; 3. Ring groove 1; 4. Ring groove 2; 5. Connecting port; 6. Pressure plate; 7. Force-bearing cam; 8. Ring block; 9. Flange; 10. Inner ring; 11. Outer ring; 12. Connecting piece; 13. Inclined surface 1; 14. Inclined surface 2; 15. Inclined surface 3; 16. Clearance groove. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of the embodiments.

[0023] like Figure 1 and Figure 2 as well as Figure 3 As shown, the present application provides a sealed fastening bolt, including a head 1 and a screw 2, the head 1 and the screw 2 are integrally formed, and a ring groove 3 is provided on the side of the head 1 facing the screw 2, and a sealing gasket is provided in the ring groove 3. When the bolt is locked on an object, the sealing gasket will come into contact with the object, reducing the gap between the object and the head 1, and improving the sealing performance when the bolt is locked.

[0024] like Figure 2 and Figure 3 As shown, a ring groove 2 4 is provided on the side of the head 1 away from the screw 2, and the ring groove 1 3 and the ring groove 2 4 are connected by a connecting port 5. A pressure plate 6 is slidingly provided in the ring groove 1 3, and a force-bearing protrusion 7 is extended from the pressure plate 6. The force-bearing protrusion 7 extends into the ring groove 2 4 through the connecting port 5. The cooperation between the force-bearing protrusion 7 and the connecting port 5 prevents the pressure plate 6 from rotating in the ring groove 1 3, and the sealing gasket is located at the opening of the ring groove 1 3, and the sealing gasket is in contact with the pressure plate 6, wherein a connecting piece is provided in the ring groove 2 4, and the connecting piece includes a ring block 8, which is threadedly connected to the side wall of the ring groove 2 4 through a thread, and the ring block 8 is provided with a flange 9, which extends to the side wall of the head 1. The flange 9 can provide a certain shielding for the surface of the head 1, thereby reducing the probability of water and dust entering the gap between the ring block 8 and the ring groove 2 4.

[0025] When the bolt is rotated to lock the object, the gasket will remain in the opening of the ring groove 3. When the head 1 comes into contact with the object, the friction between the gasket and the object is small, which reduces the torsional force on the gasket from the surface of the object and the head 1, reduces the probability of damage to the gasket, protects the gasket, and extends the sealing life of the gasket.

[0026] When the bolt is locked on the object, by rotating the ring block 8, the ring block 8 will rotate under the action of the thread and slide toward the direction close to the force-bearing protrusion 7. The ring block 8 and the force-bearing protrusion 7 will contact, and the force-bearing protrusion 7 and the pressure plate 6 will slide under force, so that the pressure plate 6 and the object will squeeze the sealing gasket, and the sealing gasket will be deformed under force, reducing the probability of gas and liquid leaking from the bolt hole of the equipment and improving the sealing effect of the bolt.

[0027] like Figure 3 and Figure 4 As shown, the sealing gasket includes an inner ring 10, an outer ring 11 and a connecting piece 12. The connecting piece 12 is located between the inner ring 10 and the outer ring 11. The inner ring 10 and the outer ring 11 are connected by the connecting piece 12. A clearance groove 16 is formed between the inner ring 10, the outer ring 11 and the connecting piece 12. When the sealing gasket is installed into the ring groove 3, the inner ring 10 and the outer ring 11 can be squeezed to make the inner ring 10 and the outer ring 11 close to each other. By reducing the space size of the clearance groove 16, the size of the sealing gasket is reduced, thereby facilitating the installation of the sealing gasket into the ring groove 3 and improving the convenience of operation.

[0028] like Figure 4 As shown, the inner ring 10 and the outer ring 11 are formed with an inclined surface 13 on the side away from each other, and the ring groove 3 is provided with an inclined surface 2 14. The inclined angles of the inclined surface 2 14 and the inclined surface 13 are consistent. When the sealing gasket is subjected to the force of the pressure plate 6, the inclined surface 13 and the inclined surface 2 14 will press against each other, which can reduce the gap between the sealing ring and the opening of the ring groove 3 and further improve the sealing performance. The position where the pressure plate 6 and the sealing gasket contact is provided with an inclined surface 3 15. The inclined surface 3 15 and the inclined surface 13 are consistent in inclination angle. The inclined surface 3 15 can increase the direction of the force acting on the side wall of the ring groove 3 of the sealing gasket, increase the contact force between the inclined surface 13 and the inclined surface 2 14, and further improve the sealing performance.

[0029] In summary, the bolt provided in this embodiment improves the sealing effect of the bolt and extends the service life of the sealing gasket.

[0030] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A sealing fastening bolt, comprising a head and a screw, characterized in that: The head is respectively provided with an annular groove 1 and an annular groove 2 on the side facing the screw and away from the screw, and the annular groove 1 and the annular groove 2 are connected via a connecting port, a pressure plate is slidingly provided in the annular groove 1, a force-bearing convex is extended from the pressure plate, and the force-bearing convex extends into the annular groove 2 through the connecting port, a sealing gasket in contact with the pressure plate is installed in the annular groove 1, and the annular groove 2 is connected to a connecting piece that pushes the force-bearing convex.

2. The sealing fastening bolt according to claim 1, characterized in that: The connecting piece comprises a ring block, and the ring block is threadedly connected to two side walls of the ring groove through a thread.

3. The sealing fastening bolt according to claim 2, characterized in that: The ring block is provided with a flange, and the flange extends to the side wall of the head.

4. The sealing fastening bolt according to claim 1, characterized in that: The sealing gasket includes an inner ring and an outer ring, the inner ring and the outer ring are connected, and the inner ring and the outer ring are both formed with an inclined surface 1 on the side away from each other. The ring groove 1 is provided with an inclined surface 2, and the inclination angle of the inclined surface 2 is consistent with that of the inclined surface 1.

5. The sealing fastening bolt according to claim 4, characterized in that: A third inclined surface is provided at the position where the pressure plate contacts the sealing gasket, and the inclined surface three has the same inclination angle as the inclined surface one.

6. The sealing fastening bolt according to claim 4, characterized in that: The sealing gasket further includes a connecting piece, the inner ring and the outer ring are connected by the connecting piece, and a clearance groove is formed between the inner ring, the outer ring and the connecting piece.

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