Locking bolt

Abstract

The present application relates to a kind of sealed locking bolt, it is used to connect the first threaded hole connecting piece and the second threaded hole connecting piece being equipped with, first threaded hole and second threaded hole are same in rotation direction, and the diameter of first threaded hole is greater than the diameter of second threaded hole, sealed locking bolt includes bolt, first ring segment and second ring segment, first ring segment is placed in first threaded hole, both end faces of first ring segment are bevel, the included angle of both bevels with the top surface of first ring segment is obtuse angle, first ring segment is equipped with first thread segment on cooperation with first threaded hole, second ring segment is also equipped in first threaded hole, connecting piece is equipped with limit groove in communication with first threaded hole, limit piece is equipped in limit groove, second ring segment and limit piece are circumferentially fixed, first ring segment and second ring segment become closed ring after combination.The anti-loosening effect of the sealed locking bolt of the present application is good, and it is not easy to loosen.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bolts, in particular to a sealed locking bolt. BACKGROUND

[0002] The bolt assembly is used for fastening and connecting two parts with through holes, which is widely used in production and life, and has become an indispensable part in industrial production. However, the bolt assembly is prone to looseness after being tightened on the parts due to the movement of the parts, especially in high-speed vehicles and continuously running machines, etc. In the long-term operation of the machine, different degrees of vibration will occur, which will cause the bolt to loosen or even fall off. If the fastening bolt of the running machine falls off, it may affect the safety of personnel and cause great property loss. In addition, in order to prevent foreign matter and external fluid from penetrating and leaking from the bolt connection part, the bolt assembly needs to have sealing effect. The sealing effect and anti-loosening effect of the existing bolt assembly are not good. SUMMARY

[0003] In order to overcome the technical defects of the prior art, the present application provides a sealed locking bolt, which has good sealing and anti-loosening effect and is not easy to loosen.

[0004] The technical solution adopted by the present application is as follows: a sealed locking bolt is used to connect a connected part provided with a first threaded hole and a connecting part provided with a second threaded hole, the first threaded hole and the second threaded hole have the same rotation direction, and the diameter of the first threaded hole is greater than that of the second threaded hole. The sealed locking bolt comprises a bolt, the bolt comprises a screw rod part and a screw head arranged at the upper end of the screw rod part, a first ring segment with a central angle greater than one hundred and eighty degrees is fixed to the screw rod part below the screw head, the first ring segment is arranged in the first threaded hole, both end faces of the first ring segment are inclined surfaces, and the included angle between each inclined surface and the top surface of the first ring segment is obtuse. A first threaded segment is arranged on the side of the first ring segment away from the center, which cooperates with the first threaded hole. A second ring segment is also arranged in the first threaded hole. A limiting groove is arranged in the connected part and communicates with the first threaded hole. A limiting piece is arranged in the limiting groove. The second ring segment and the limiting piece are fixed in the circumferential direction. The first ring segment and the second ring segment combine to form a closed ring. An elastic washer is arranged below the screw head, and the lower end of the elastic washer abuts against the top surface of the first ring segment and the second ring segment. The sealed locking bolt further comprises a sealing assembly, which comprises a flexible sealing ring arranged between the screw head and the screw rod, and a sealing cover arranged below the screw head.

[0005] Preferably, an upward opening blind hole is arranged on each of the two inclined surfaces of the first ring segment, and a protrusion is arranged on the second ring segment to be inserted and cooperated with the blind hole.

[0006] Preferably, the side of the second ring segment away from the bolt axis is provided with a vertically extending groove, and the limiting piece is provided with a protrusion matched with the groove.

[0007] Preferably, the screw head is a hexagonal bolt head.

[0008] Preferably, a transition section is arranged between the screw head and the screw rod part, and a flexible sealing ring is arranged on the transition section.

[0009] Preferably, the flexible sealing ring is an inverted cone arranged on the transition section.

[0010] Preferably, the sealing cover completely covers the top surface of the closed ring formed by the combination of the first ring segment and the second ring segment, and the bottom surface of the sealing cover is connected with a rubber sleeve matched with the sealing of the connected piece.

[0011] The sealing locking bolt of the present application has the following beneficial effects: the sealing locking bolt of the present application comprises a bolt, the bolt comprises a screw rod part and a screw head arranged at the upper end of the screw rod part, a first ring segment with a central angle greater than one hundred and eighty degrees is arranged on the screw rod part below the screw head, the first ring segment is matched with a first threaded hole through a threaded pair, a second ring segment is further arranged in the first threaded hole, a limiting groove is arranged on the connected piece and communicated with the first threaded hole, the second ring segment extends into the limiting groove from the first threaded hole, and after the screw rod is combined in the first threaded hole through the first ring segment, the second ring segment is assembled, so that the first ring segment and the second ring segment form a complete closed ring, when the bolt is loosened and rotated due to vibration, the second ring segment cannot rotate with the bolt and will lock the first ring segment so that it cannot rotate, thus realizing the locking of the bolt. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a schematic view of the structure of the sealing locking bolt of the present application.

[0013] Fig. 2 It is a top view of the first ring segment of the present application.

[0014] Fig. 3 It is a front view of the second ring segment of the present application.

[0015] Fig. 4 It is an assembly schematic view of the first ring segment and the second ring segment of the present application.

[0016] Marked as follows: 1, connected piece; 101, first threaded hole; 102, through hole; 103, limiting groove; 2, connecting piece; 201, second threaded hole; 3, bolt; 301, screw head; 302, screw rod part; 303, transition section; 4, first ring segment; 401, inclined surface; 402, blind hole; 5, second ring segment; 501, protrusion; 502, groove; 6, limiting piece; 601, protrusion; 8, sealing cover; 801, rubber sleeve; 9, flexible sealing ring. DETAILED DESCRIPTION

[0017] The application will be further described below with reference to the drawings:

[0018] As Figs. 1 to 4 shown in the drawings, the present embodiment provides a sealed locking bolt, which is used for connecting a connected member 1 provided with a first threaded hole 101 and a connecting member 2 provided with a second threaded hole 201, the first threaded hole 101 and the second threaded hole 201 have the same rotation direction, and the diameter of the first threaded hole 101 is greater than that of the second threaded hole 201, the sealed locking bolt comprises a bolt 3, the bolt 3 comprises a shank 302 and a head 301 arranged at the upper end of the shank 302, and a first ring segment 4 with a central angle greater than one hundred and eighty degrees is fixed to the shank 302 below the head 301. Preferably, the first ring segment 4 is matched in the first threaded hole 101 through a threaded pair, both end faces of the first ring segment 4 are bevels 401, and the included angle between each bevel 401 and the top surface of the first ring segment 4 is an obtuse angle, and the side away from the center of the first ring segment 4 is provided with a first threaded segment matched with the first threaded hole 101, and a second ring segment 5 is further arranged in the first threaded hole 101, a limiting groove 103 communicating with the first threaded hole 101 is arranged on the connected member 1, a limiting member 6 is arranged in the limiting groove 103, the second ring segment 5 and the limiting member 6 are fixed in the circumferential direction, the first ring segment 4 and the second ring segment 5 combine to form a closed ring, and the sealed locking bolt further comprises a sealing assembly, the sealing assembly comprises a flexible sealing ring 9 arranged between the head 301 and the shank 302 and a sealing cover 8 arranged below the head 301, the sealed locking bolt of the present embodiment has a simple structure, can effectively prevent the bolt 3 from loosening, and has good sealing effect.

[0019] The sealed locking bolt of the present embodiment prevents the bolt 3 from loosening through the locking of the first ring segment 4 and the second ring segment 5, the first ring segment 4 is fixed to the shank 302 of the bolt 3, and the first ring segment 4 is matched with the first threaded hole 101 on the connected member 1 through the first threaded segment arranged thereon, when the bolt 3 loosens, the bolt 3 will rotate and move upward, the first ring segment 4 will rotate accordingly, when the first ring segment 4 rotates, one bevel 401 on the first ring segment 4 will abut against the second ring segment 5 and push the second ring segment 5, due to the existence of the bevel 401, the force exerted by the first ring segment 4 on the second ring segment 5 is inclined upward, and due to the existence of the limiting member 6, the second ring segment 5 cannot rotate with the bolt 3 and will lock the first ring segment 4 so that it cannot rotate.

[0020] In the embodiment, the first ring segment 4 is provided with an upward opening blind hole 402 on each of the two inclined surfaces 401, the second ring segment 5 is provided with a protrusion 501 which is inserted into the blind hole 402, the second ring segment 5 is provided with a vertical groove 502 on the side away from the bolt 3 axis, the limiting member 6 is provided with a convex strip 601 which is inserted into the groove 502, the bolt 3 is screwed into the second threaded hole 201, at the same time, the first ring segment 4 is screwed into the first threaded hole 101, the bolt 3 is continuously rotated to make the notch of the first ring segment 4 align with the limiting groove 103 on the connected member 1, then the second ring segment 5 and the limiting member 6 are installed, and the convex strip 601 on the limiting member 6 is inserted into the groove 502 on the second ring segment 5.

[0021] In the embodiment, the sealing cover 8 covers the top surface of the closed ring formed by the combination of the first ring segment 4 and the second ring segment 5, and the bottom surface of the sealing cover 8 is connected with a rubber sleeve 801 which is sealingly connected with the connected member 1, the sealing cover 8 makes the gap between the first ring segment 4 and the second ring segment 5 isolated from the outside, so as to prevent impurities and external fluid from penetrating into the threaded holes.

[0022] In the embodiment, the transition section 303 is arranged between the screw head 301 and the screw rod 302, and the flexible sealing ring 9 is arranged on the transition section 303, when the screw rod 302 is screwed into the second threaded hole 201, the transition section 303 is arranged in the through hole 102 at the bottom of the connected member 1, and the flexible sealing ring 9 is compressed and deformed, and the deformed flexible sealing ring 9 is filled and sealed between the connected member 1 and the connecting member 2.

[0023] In use, the first threaded hole 101 on the connected member 1 and the second threaded hole 201 on the connecting member 2 are coaxial, the flexible sealing ring 9 is sleeved on the transition section 303, the screw rod 302 of the bolt 3 is inserted into the second threaded hole 201 of the connected member 1, the first ring segment 4 is inserted into the first threaded hole 101 after continuous rotation, then the bolt 3 is continuously rotated to make the notch of the first ring segment 4 align with the limiting groove 103 on the connected member 1, then the second ring segment 5 and the limiting member 6 are installed, and the convex strip 601 on the limiting member 6 is inserted into the groove 502 on the second ring segment 5, the screw head 301 of the embodiment is a hexagonal bolt head.

[0024] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and those skilled in the art should understand that the present application is not limited to the above embodiments, the above embodiments and the description in the specification are only to illustrate the principle of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application, the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A captive bolt for connecting a connected member provided with a first threaded hole and a connecting member provided with a second threaded hole, the first threaded hole and the second threaded hole being of the same hand and the diameter of the first threaded hole being larger than the diameter of the second threaded hole, characterized in that: The sealing lock bolt comprises a bolt, the bolt comprises a screw rod part and a screw head arranged at the upper end of the screw rod part, a first ring segment with a central angle greater than 180 degrees is fixed on the screw rod part below the screw head, the first ring segment is arranged in the first threaded hole, both end faces of the first ring segment are inclined surfaces, the included angle between each inclined surface and the top surface of the first ring segment is obtuse, a first threaded segment matched with the first threaded hole is arranged on the side of the first ring segment away from the center, a second ring segment is further arranged in the first threaded hole, a limiting groove communicated with the first threaded hole is arranged on the connected part, a limiting part is arranged in the limiting groove, the second ring segment and the limiting part are fixed in the circumferential direction, the first ring segment and the second ring segment form a closed ring after being combined, the sealing lock bolt further comprises a sealing assembly, the sealing assembly comprises a flexible sealing ring arranged between the screw head and the screw rod and a sealing cover arranged below the screw head; Both inclined surfaces of the first ring segment are provided with upward opening blind holes, the second ring segment is provided with a protrusion matched with the blind hole in the form of plug-in connection; The side of the second ring segment away from the bolt axis is provided with a vertical groove, and the limiting part is provided with a convex strip matched with the groove.

2. The captive bolt of claim 1, wherein: The screw head is a hexagonal bolt head.

3. The captive bolt of claim 1, wherein: A transition section is arranged between the screw head and the screw rod part, and the flexible sealing ring is arranged on the transition section.

4. The captive bolt of claim 3, wherein: The flexible sealing ring is an inverted conical part sleeved on the transition section.

5. The captive bolt of claim 1, wherein: The sealing cover completely covers the top surface of the closed ring formed by the combination of the first ring segment and the second ring segment, and the bottom surface of the sealing cover is connected with a rubber sleeve matched with the connected part in the form of sealing.

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