A sealed fastening structure

Abstract

The utility model relates to the technical field of bolts, specifically a sealing type fastening structure, including a matching part, a fitting part and a screw part; the matching part is connected to one end of the fitting part, and in the use state, the matching part is used to drive the fitting part to rotate under the action of an external force; the screw part is connected to the other end of the fitting part; the end face of the fitting part close to the screw part is concave toward the central axis of the rod part to form a sealing surface on the end face of the fitting part; the sealing surface and the outer peripheral surface of the screw part enclose a containing space for containing glue. When the fastening structure provided by the utility model connects two parts, a concave sealing surface is arranged on the flange surface of the fitting part, so that a large compressive stress can be generated on the outer edge of the end face of the fitting part during assembly, so that the glue liquid gathers to the root of the fastening structure and solidifies, thereby greatly improving the sealing performance of the fastening structure to increase the sealing life.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a sealing type fastening structure. Background Art

[0002] like Figure 1 The figure shows an existing bolt structure, which is coated with glue on the outside of its thread to enhance the fastening force and improve the sealing performance during use; however, as the use time increases, the equipment connected by the bolts will vibrate, and the long-term vibration will reduce the sealing effect of the bolts, causing the sealing connection effect to be completely lost. Utility Model Content

[0003] The utility model aims to provide a sealing fastening structure in view of the problems existing in the background technology.

[0004] The technical solution of the utility model is: a sealed fastening structure, comprising a matching part, a fitting part and a screw part; the matching part is connected to one end of the fitting part, and in a state of use, the matching part is used to drive the fitting part to rotate under the action of an external force; the screw part is connected to the other end of the fitting part; the end face of the fitting part close to the screw part is concave toward the center axis of the rod part to form a sealing surface on the end face of the fitting part; the sealing surface and the outer peripheral surface of the screw part enclose a containing space for containing the glue liquid.

[0005] Preferably, the projection shape of the matching portion is a regular polygon.

[0006] Preferably, the projection shape of the matching portion is a regular hexagon.

[0007] Preferably, the projection shape of the matching portion is circular.

[0008] Preferably, the diameter of the sealing surface is less than or equal to the diameter of the fitting portion and greater than the outer diameter of the screw portion.

[0009] Preferably, the sealing surface is configured as an inclined surface.

[0010] Compared with the prior art, the above technical solution of the utility model has the following beneficial technical effects:

[0011] When the fastening structure provided by the utility model connects two components, glue is placed in the accommodating space surrounded by the sealing surface and the outer peripheral surface of the screw portion, and a concave sealing surface is provided on the flange surface of the fitting portion to increase its effective area when in use, thereby generating a large compressive stress on the outer edge of the end surface of the fitting portion during assembly, so that the glue is gathered at the root of the fastening structure and solidified, thereby greatly improving the sealing performance of the fastening structure and increasing the sealing life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 For existing bolt structure.

[0013] Figure 2 and Figure 3 All of them are stereograms of an embodiment of the present invention.

[0014] Figure 4 for Figure 2 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0015] Figure 5 The present invention is a schematic structural diagram of an embodiment of the present invention.

[0016] Figure numerals: 1, mating part; 101, groove; 102, protrusion; 103, gap space; 104, chamfer; 2, fitting part; 201, sealing surface; 3, screw part. DETAILED DESCRIPTION

[0017] like Figure 2-5 As shown, a sealing type fastening structure proposed by the utility model comprises a matching portion 1, a fitting portion 2 and a screw portion 3;

[0018] The mating portion 1 is connected to one end of the fitting portion 2, and the central axis of the mating portion 1 coincides with the central axis of the fitting portion 2. When in use, the mating portion 1 is used to drive the fitting portion 2 to rotate under the action of an external force so that the fitting portion 2 is pressed against the end face of the object to be connected; the end face of the object to be connected and the fitting portion 2 in contact is a plane; the end face of the object to be connected pressed against by the fitting portion 2 is recorded as a flange face.

[0019] In an optional embodiment, the projection shape of the mating portion 1 is a regular polygon, wherein the projection shape of the mating portion 1 is selected from but not limited to a regular pentagon or a regular hexagon. When the two parts are connected using a fastening structure, a wrench is used to clamp the mating portion 1 whose projection shape is a regular polygon to rotate the mating portion 1.

[0020] In another optional embodiment, the projection shape of the mating portion 1 is circular; a groove 101 is provided on the end face of the mating portion 1 away from the fitting portion 2; the notch shape of the groove 101 is a regular polygon; a plurality of fitting portions 2 are provided on the inner wall of the groove 101; the number of the fitting portions 2 is the same as the number of sides of the notch shape of the groove 101, and they correspond one to one, and a gap space 103 is left between two adjacent fitting portions 2; wherein, the side surface of each fitting portion 2 away from the inner wall of the groove 101 is set as a curved surface, and the upper end surface of each fitting portion 2 is a chamfer 104 inclined downward toward the central axis direction of the groove 101; a wrench adapted to fit the plurality of fitting portions 2 installed in the groove 101 is used to rotate the mating portion 1 to disassemble and assemble the fastening structure; the above-mentioned wrench is specially designed according to the structure in the groove 101 of the mating portion 1, thereby preventing the fastening structure from being operated by others using a conventional wrench structure during use.

[0021] The screw portion 3 is connected to the other end of the fitting portion 2, and an external thread is provided on the outer peripheral surface of the screw portion 3, and the central axis of the screw portion 3 coincides with the central axis of the fitting portion 2; the end surface of the fitting portion 2 close to the screw portion 3 is recessed toward the central axis of the rod portion 3 to form a sealing surface 201 on the end surface of the fitting portion 2; the sealing surface 201 and the outer peripheral surface of the screw portion 3 form a accommodating space for accommodating glue, that is, a sealing surface 201 is provided on the flange surface of the fitting portion 2, and when the fastening structure is used to connect two objects, glue is placed in the sealing surface 201 and the flange surface is recessed to form the sealing surface 201 to increase its area, thereby greatly improving the stability and sealing of the connection of the fastening structure when connecting two objects.

[0022] In an optional embodiment, the diameter of the sealing surface 201 is less than or equal to the diameter of the fitting portion 2 and greater than the outer diameter of the screw portion 3; the sealing surface 201 is set as an inclined surface, and the angle between the sealing surface 201 and the end surface of the fitting portion 2 is set to α; the value of α is selected through experiments based on actual needs.

[0023] When the fastening structure provided by the utility model connects two components, glue is placed in the accommodating space surrounded by the sealing surface 201 and the outer peripheral surface of the screw portion 3, and a concave sealing surface 201 is provided on the fitting portion 2, so that a large compressive stress can be generated on the outer edge of the end surface of the fitting portion 2 during assembly, so that the glue is gathered at the root of the fastening structure and solidified, thereby greatly improving the sealing performance of the fastening structure and increasing the sealing life.

[0024] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A sealing fastening structure, comprising a matching portion (1), a fitting portion (2) and a screw portion (3); the matching portion (1) is connected to one end of the fitting portion (2), and in a use state, the matching portion (1) is used to drive the fitting portion (2) to rotate under the action of an external force; the screw portion (3) is connected to the other end of the fitting portion (2); characterized in that, The end surface of the fitting portion (2) close to the screw portion (3) is recessed in the direction of the central axis of the rod portion (3) to form a sealing surface (201) on the end surface of the fitting portion (2); the sealing surface (201) and the outer peripheral surface of the screw portion (3) form a receiving space for receiving the glue liquid.

2. A sealing fastening structure according to claim 1, characterized in that: The projection shape of the matching portion (1) is a regular polygon.

3. A sealing fastening structure according to claim 1 or 2, characterized in that: The projection shape of the matching portion (1) is a regular hexagon.

4. A sealing fastening structure according to claim 1, characterized in that: The projection shape of the matching portion (1) is circular.

5. A sealing fastening structure according to claim 1, characterized in that: The diameter of the sealing surface (201) is less than or equal to the diameter of the fitting portion (2) and greater than the outer diameter of the screw portion (3).

6. A sealing fastening structure according to claim 1 or 5, characterized in that: The sealing surface (201) is configured as an inclined surface.

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