CN115789060A - Sealing anti-loose bolt - Google Patents

Abstract

The invention relates to a sealing anti-loosening bolt which is used for being connected with a connecting piece provided with a first threaded hole and a connecting piece provided with a second threaded hole, wherein the rotating directions of the first threaded hole and the second threaded hole are the same, the diameter of the first threaded hole is larger than that of the second threaded hole, the sealing anti-loosening bolt comprises a bolt, a first ring segment and a second ring segment, the first ring segment is arranged in the first threaded hole, two end surfaces of the first ring segment are inclined surfaces, included angles between the two inclined surfaces and the top surface of the first ring segment are obtuse angles, a first threaded section matched with the first threaded hole is arranged on the first ring segment, the second ring segment is further arranged in the first threaded hole, a limiting groove communicated with the first threaded hole is arranged on the connecting piece, a limiting piece is arranged in the limiting groove, the second ring segment and the limiting piece are circumferentially fixed, and the first ring segment and the second ring segment are combined to form a closed ring. The sealing anti-loosening bolt has good anti-loosening effect and is not easy to loosen.

Description

Sealed lock bolts

technical field

The invention relates to the technical field of bolts, in particular to a sealing and anti-loosening bolt.

Background technique

The bolt assembly is used to fasten two parts with through holes. It is widely used in production and life, and has become an indispensable part in industrial production. However, after the bolt assembly is tightened to the parts, it is easy to loosen due to the movement of the parts, especially for high-speed running vehicles and continuously running machinery and equipment. If the fastening bolts of the running machinery and equipment loosen and fall off, it may affect the safety of personnel and cause great property losses. In addition, in order to prevent external impurities and external fluids from seeping and leaking from the bolted joints, The bolt assembly needs to have a sealing effect, and the existing bolt assembly has poor sealing effect and anti-loosening effect.

Contents of the invention

In order to overcome the technical defects in the prior art, the invention provides a sealing and anti-loosening bolt, which has good sealing and anti-loosening effects and is not easy to loosen.

The technical solution adopted in the present invention is: sealing and anti-loosening bolts, which are used to connect the connected piece with the first threaded hole and the connecting piece with the second threaded hole, the first threaded hole and the second threaded hole The threaded holes have the same direction of rotation and the diameter of the first threaded hole is greater than the diameter of the second threaded hole. The sealing and anti-loosening bolts include bolts, and the bolts include a screw part and a screw head arranged on the upper end of the screw part. The screw head A first ring segment with a central angle greater than 180 degrees is fixedly connected to the lower screw part, the first ring segment is placed in the first threaded hole, and the two end faces of the first ring segment are The angle between the two slopes and the top surface of the first ring segment is an obtuse angle, and the side of the first ring segment away from the center of the circle is provided with a first threaded segment that matches the first threaded hole. The first threaded hole is also provided with a second ring segment, and the connected piece is provided with a limiting groove communicating with the first threaded hole, and a limiting member is arranged in the limiting groove, and the second ring segment and the limiting member are fixed in the circumferential direction, the first ring segment is combined with the second ring segment to form a closed ring, and an elastic washer is arranged under the screw head, and the lower end of the elastic washer is connected to the first ring segment, the second ring segment The top surface of the second ring section abuts, and the sealing and anti-loosening bolt also includes a sealing assembly, and the sealing assembly includes a flexible sealing ring arranged between the screw head and the screw rod and a sealing cover arranged under the screw head.

Preferably, blind holes with openings facing upward are provided on both slopes of the first ring segment, and protrusions are provided on the second ring segment to fit into the blind holes.

Preferably, a groove extending vertically is provided on the side of the second ring segment away from the axis of the bolt, and a protruding line cooperating with the groove is provided on the limiting member.

Preferably, the screw head is a hexagon bolt head.

Preferably, a transition section is provided between the screw head and the screw rod part, and a flexible sealing ring is provided on the transition section.

Preferably, the flexible sealing ring is an inverted tapered piece sleeved on the transition section.

Preferably, the sealing cover completely covers the top surface of the closed ring formed by combining the first ring segment and the second ring segment, and the outer edge of the bottom surface of the sealing cover is connected with the connected part for sealing fit rubber sleeve.

The beneficial effect of the present invention is that: the sealing and anti-loosening bolt of the present invention includes a bolt, the bolt includes a screw part and a screw head arranged on the upper end of the screw part, and the screw part below the screw head is provided with a central angle greater than one The first ring segment of 180 degrees, the first ring segment is matched with the first threaded hole through a thread pair, the second ring segment is also provided in the first threaded hole, and the connected part is provided with a The limit groove connected to the first threaded hole, the second ring segment extends from the first threaded hole into the limit groove, and after the screw 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 loop. When the bolt loosens and rotates due to vibration, the second ring segment cannot follow the rotation of the bolt and locks the first ring segment so that it cannot rotate, thus realizing the locking of the bolt.

Description of drawings

Fig. 1 is a schematic diagram of the structure sealing anti-loosening bolt of the present invention.

Fig. 2 is a top view of the first ring segment of the present invention.

Fig. 3 is the front view of the second ring section of the present invention

Fig. 4 is a schematic diagram of the assembly of the first ring segment and the second ring segment of the present invention.

Explanation of reference signs: 1. Connected piece; 101, first threaded hole; 102, through hole; 103, limit groove; 2, connector; 201, second threaded hole; 3, bolt; 301, screw head; 302, screw part; 303, transition section; 4, first ring section; 401, slope; 402, blind hole; 5, second ring section; 501, protrusion; 502, groove; 6, limiter; 601 , convex strip; 8, sealing cover; 801, rubber sleeve; 9, flexible sealing ring.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing:

As shown in Figures 1 to 4, this embodiment provides a sealing and anti-loosening bolt, which is used to connect the connected part 1 provided with the first threaded hole 101 and the connecting part 2 provided with the second threaded hole 201, so The rotation direction of the first threaded hole 101 is the same as that of the second threaded hole 201 and the diameter of the first threaded hole 101 is larger than the diameter of the second threaded hole 201. The sealing and anti-loosening bolts include bolts 3, and the bolts 3 include The screw part 302 and the screw head 301 arranged at the upper end of the screw part 302, the screw part 302 below the screw head 301 is fixedly connected with the first ring segment 4 with a central angle greater than 180 degrees. Preferably, the first ring segment 4 is fitted in the first threaded hole 101 through a thread pair, and both end faces of the first ring segment 4 are slopes 401, and the two slopes 401 are connected to the first ring The included angles of the top surface of the section 4 are all obtuse angles, and the side of the first ring section 4 far away from its center is provided with a first threaded section matched with the first threaded hole 101, and the first threaded hole 101 also has a A second ring segment 5 is provided, and the connected part 1 is provided with a limiting groove 103 communicating with the first threaded hole 101, and a limiting member 6 is arranged in the limiting groove 103, and the second ring segment 5 and the limiting member 6 are circumferentially fixed, and the first ring segment 4 is combined with the second ring segment 5 to form a closed ring. The sealing and anti-loosening bolt also includes a sealing assembly, and the sealing assembly includes a The flexible sealing ring 9 between the screw head 301 and the screw part 302 and the sealing cover 8 arranged under the screw head 301, the sealing and anti-loosening bolt of this embodiment has a simple structure, can effectively prevent the bolt 3 from loosening, and has a good sealing effect.

The sealing and anti-loosening bolt of this embodiment prevents the loosening of the bolt 3 through the locking of the first ring segment 4 and the second ring segment 5. The first ring segment 4 and the screw part 302 of the bolt 3 are affixed, and the first ring segment Section 4 passes through the first threaded section provided on it and the first threaded hole 101 on the connected part 1. When the bolt 3 is loosened, the bolt 3 will rotate and move upward, and the first ring section 4 will rotate accordingly. When the ring segment 4 rotates, an inclined surface 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 inclined surface 401, the first ring segment 4 will be opposite to the second ring segment. The force exerted by 5 is inclined upward, and due to the existence of the stopper 6, the second ring segment 5 cannot follow the rotation of the bolt 3 and will lock the first ring segment 4 so that it cannot rotate.

In this embodiment, both inclined surfaces 401 of the first ring segment 4 are provided with blind holes 402 with openings facing upwards, and the second ring segment 5 is provided with protrusions that are mated with the blind holes 402 . 501, the side of the second ring segment 5 away from the axis of the bolt 3 is provided with a groove 502 extending vertically, and the limiting member 6 is provided with a raised strip 601 that matches the groove 502, Install the bolt 3 so that its screw part 302 is screwed into the second threaded hole 201, while the first ring section 4 is screwed into the first threaded hole 101, and the bolt 3 is continued to be rotated so that the gap of the first ring section 4 is in line with the limit on the connected part 1 The positioning grooves 103 are aligned, and then the second ring segment 5 and the limiting member 6 are installed, so that the convex strip 601 on the limiting member 6 is inserted into the groove 502 on the second ring segment 5 .

In this embodiment, the sealing cover 8 completely covers the top surface of the closed ring formed by combining the first ring segment 4 and the second ring segment 5, and the outer edge of the bottom surface of the sealing cover 8 is connected with The rubber sleeve 801 and the sealing cover 8 that are sealed by the connected part 1 isolate the gap between the first ring segment 4 and the second ring segment 5 from the outside world, preventing impurities and external fluids from penetrating into each screw hole.

In this embodiment, a transition section 303 is provided between the screw head 301 and the screw part 302, and the flexible sealing ring 9 is arranged on the transition section 303. When the screw part 302 is screwed into the second threaded hole 201, the transition The segment 303 passes through the through hole 102 at the bottom of the connected part 1 , the flexible sealing ring 9 is compressed and deformed, and the deformed flexible sealing ring 9 fills and seals between the connected part 1 and the connecting part 2 .

When the sealing and anti-loosening bolt of this embodiment is used, the first threaded hole 101 on the connected part 1 is coaxial with the second threaded hole 201 on the connecting part 2, and the flexible sealing ring 9 is sleeved on the transition section 303, The screw part 302 of the bolt 3 passes through the connected part 1 and cooperates with the second threaded hole 201. After continuing to rotate, the first ring segment 4 cooperates with the first threaded hole 101, and then continues to rotate the bolt 3 so that the notch of the first ring segment 4 Align with the limit groove 103 on the connected part 1, and then install the second ring segment 5 and the limiter 6, so that the convex strip 601 on the limiter 6 is inserted into the groove 502 on the second ring segment 5 In cooperation, the screw head 301 in this embodiment adopts a hexagonal bolt head.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. On the premise of not departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed invention, which is defined by the appended The claims and their equivalents are defined.

Claims (7)

1. Sealing and anti-loosening bolts, which are used to connect the connected piece with the first threaded hole and the connecting piece with the 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 the diameter of the second threaded hole, and it is characterized in that: the sealing and anti-loosening bolt includes a bolt, and the bolt includes a screw part and a screw head arranged on the upper end of the screw part, and the screw below the screw head A first ring segment with a central angle greater than 180 degrees is fixed on the upper part, and the first ring segment is placed in the first threaded hole. Both end faces of the first ring segment are sloped surfaces, and both The included angles between the two slopes and the top surface of the first ring segment are all obtuse angles, and the side of the first ring segment away from its center is provided with a first threaded segment matching with the first threaded hole, and the first ring segment is A second ring segment is also provided in the threaded hole, and a limiting groove communicating with the first threaded hole is provided on the connected piece, and a limiting member is arranged in the limiting groove, and the second ring segment and the limiting The parts are fixed in the circumferential direction, and the first ring segment and the second ring segment are combined to form a closed ring. The sealing and anti-loosening bolt also includes a sealing assembly, and the sealing assembly includes a The flexible sealing ring and the sealing cover under the screw head. 2. The sealing and anti-loosening bolt according to claim 1, characterized in that: blind holes with openings facing upwards are provided on the two slopes of the first ring section, and blind holes with openings facing upwards are provided on the second ring section. Projection for blind mating mating. 3. The sealing and anti-loosening bolt according to claim 1, characterized in that: the side of the second ring segment away from the bolt axis is provided with a groove extending vertically, and the limiting member is provided with a The grooves fit the ribs. 4. The sealing and anti-loosening bolt according to claim 1, characterized in that: the screw head is a hexagonal bolt head. 5. The sealing and anti-loosening bolt according to claim 1, characterized in that: a transition section is provided between the screw head and the screw part, and a flexible sealing ring is provided on the transition section. 6. The sealing and anti-loosening bolt according to claim 5, characterized in that: the flexible sealing ring is an inverted tapered piece sleeved on the transition section. 7. The sealing and anti-loosening bolt according to claim 1, characterized in that: the sealing cover completely covers the top surface of the closed ring formed by combining the first ring segment and the second ring segment, and the The outer edge of the bottom surface of the sealing cover is connected with a rubber sleeve sealingly fitted by the connected part.

Images