CN209977039U

CN209977039U - Anti-loosening fastener

Info

Publication number: CN209977039U
Application number: CN201920831368.0U
Authority: CN
Inventors: 陈义明
Original assignee: Jiujiang Alliance Coupling Co Ltd
Current assignee: Jiujiang Alliance Coupling Co Ltd
Priority date: 2019-06-03
Filing date: 2019-06-03
Publication date: 2020-01-21
Anticipated expiration: 2029-06-03

Abstract

The utility model provides a locking fastener, relating to the technical field of fasteners, comprising a bolt, a first nut and a second nut, wherein the bolt is composed of a bolt head and a first screw rod which are of an integrated structure, the screw bolt comprises a first screw bolt and a second screw bolt, the screw direction of the first screw bolt is opposite to that of the second screw bolt, the first screw bolt and the second screw bolt are respectively matched with the first screw bolt and the second screw bolt, both sides of the side wall of the first nut are provided with limit grooves, both sides of the side wall of the second nut are provided with enclosing plates, each enclosing plate is fixedly connected with the second nut through a connecting plate, one end of each enclosing plate, which is close to the first screw bolt, is fixedly provided with a limit cylinder, one end of each limit cylinder, which is close to the bolt, is provided with a bullet outlet communicated with the inner cavity of the limit cylinder, a spring and a limit head are fixedly connected are arranged in each limit cylinder, one end of the limit head, which is far away from the spring; the utility model discloses possess good locking performance to solve the poor problem of current fastener relaxation performance.

Description

Anti-loosening fastener

Technical Field

The utility model relates to a fastener technical field, more specifically relates to a locking fastener.

Background

Fasteners, also known as standard parts, are generic names of mechanical parts used for fastening two or more parts into a whole, and the most common fastener is fastened by means of bolts and nuts. In practical application, if parts at the connecting part are in a working environment with large vibration, the fixing mode of the bolt and the nut can be loosened due to vibration, and the common solution is to lock the nut by glue or other modes to prevent the nut from loosening, so that the loosening prevention mode is not only complex in operation, but also inconvenient to disassemble.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect of the prior art, the utility model provides a locking fastener possesses good locking performance to solve the poor problem of current fastener loosening performance.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a locking fastener, which comprises a bolt, a first nut and a second nut, wherein the bolt consists of a bolt head, a first screw rod and a second screw rod which are of an integrated structure, the outer periphery of the first screw rod and the outer periphery of the second screw rod are both provided with external threads, the precession direction of the external threads of the first screw rod is opposite to the precession direction of the external threads of the second screw rod, the two ends of the first screw rod are respectively and fixedly connected with the bolt head and the second screw rod, the internal threads of the first nut are matched with the external threads of the first screw rod, the two sides of the side wall of the first nut are both provided with limiting grooves, the opening directions of the two limiting grooves are arranged in a back direction, the internal threads of the second nut are matched with the external threads of the second screw rod, the two sides of the side wall of the second nut are both provided with a cover plate, and the length direction of each, each the bounding wall all through the connecting plate with second nut fixed connection, each the bounding wall is close to the one end of first screw rod is all fixed to be equipped with spacing section of thick bamboo, two spacing section of thick bamboo about the centerline symmetry of bolt sets up, each spacing inside cavity, each spacing section of thick bamboo is close to the one end of bolt all be equipped with the bullet export that spacing section of thick bamboo inner chamber is linked together, each all install fixed connection's spring, spacing head in the spacing section of thick bamboo, spacing head is kept away from the one end of spring is passed through the bullet export extends to spacing section of thick bamboo is outside, spacing head is kept away from the tip of spring with spacing groove phase-match.

The utility model discloses among the technical scheme of preferred, each spacing section of thick bamboo lateral wall all be equipped with the mouth of stirring that spacing section of thick bamboo inner chamber is linked together, stir the mouth and follow the length direction of spring sets up, each spacing section of thick bamboo is in stir a mouthful department and be equipped with the stirring piece, stirring piece one end with spacing head lateral wall fixed connection, the stirring piece other end passes through stir the mouth and extend to spacing section of thick bamboo is outside.

In the preferred embodiment of the present invention, the diameter of the first screw is larger than the diameter of the second screw.

The utility model discloses in the technical scheme of preferred, two minimum distance between the spacing head is less than the distance between two spacing grooves.

The utility model discloses in the technical scheme of preferred, the bolt head with first nut all adopts hexagon nut.

The utility model has the advantages that:

the utility model provides a pair of locking fastener, the structural improvement that has gone on of fastener in the past, moreover, the steam generator is simple in structure, be the screw rod that two sections precession directions are inequality with the bolt design, and utilize the joint of spacing head and spacing groove, make two nuts of installing respectively on two sections screw rods constitute integrative contradiction structure of restricting each other again, utilize the characteristics of screw thread self-contradiction to prevent two nuts rotatory along same direction, prevent rotation between bolt and the nut, and then reach locking effect, with the problem of solving current fastener loosening performance difference.

Drawings

Fig. 1 is a front view of a loose-proof fastener according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a loose-proof fastener according to an embodiment of the present invention;

fig. 3 is an enlarged view of a portion a of the anti-loose fastener according to the embodiment of the present invention.

In the figure:

110. a first screw; 120. a second screw; 130. a bolt head; 210. a first nut; 211. a limiting groove; 220. a second nut; 300. enclosing plates; 400. a connecting plate; 500. a limiting cylinder; 510. a projectile port; 520. a poke port; 600. a spring; 700. a limiting head; 800. a toggle sheet.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings and technical solutions needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

The technical solution of the present invention is further described below by referring to the drawings and the embodiments, it should be noted that the drawings in the embodiments are only schematic diagrams and do not limit the size, and the actual size is subject to the material object.

As shown in fig. 1 to 3, in the present embodiment, there is provided an anti-loose fastener, including a bolt, a first nut 210, and a second nut 220, where the bolt is composed of a bolt head 130, a first screw 110, and a second screw 120, which are of an integrated structure, a central line of the bolt head 130, a central line of the first screw 110, and a central line of the second screw 120 are all overlapped, outer peripheries of the first screw 110 and the second screw 120 are both provided with external threads, a screwing direction of the external threads of the first screw 110 is opposite to a screwing direction of the external threads of the second screw 120, that is, when the first screw 110 is a right-handed screw, the second screw 120 is a left-handed screw, and when the first screw 110 is a left-handed screw, the second screw 120 is a right-handed screw; the two ends of the first screw rod 110 are respectively fixedly connected with the bolt head 130 and the second screw rod 120, the internal thread of the first nut 210 is matched with the external thread of the first screw rod 110, the two sides of the side wall of the first nut 210 are respectively provided with a limiting groove 211, the opening directions of the two limiting grooves 211 are arranged in the opposite directions, the internal thread of the second nut 220 is matched with the external thread of the second screw rod 120, the two sides of the side wall of the second nut 220 are respectively provided with a surrounding plate 300, the length direction of each surrounding plate 300 is the same as that of the second screw rod 120, each surrounding plate 300 is fixedly connected with the side wall of the second nut 220 through a connecting plate 400, one end of each surrounding plate 300, which is close to the first screw rod 110, is fixedly provided with a limiting cylinder 500, the two limiting cylinders 500 are symmetrically arranged about the central line of the bolt, and each limiting cylinder 500 is hollow, each spacing section of thick bamboo 500 is close to the one end of bolt all be equipped with the play mouth 510 that spacing section of thick bamboo 500 inner chamber is linked together, each all install fixed connection's spring 600, spacing head 700 in the spacing section of thick bamboo 500, spring 600 keeps away from spacing head 700's one end with spacing section of thick bamboo 500 inner wall fixed connection, spacing head 700 keeps away from spring 600's one end is passed through play mouth 510 extends to spacing section of thick bamboo 500 is outside, spacing head 700 keeps away from spring 600's tip with spacing groove 211 phase-match.

Furthermore, the side wall of each limiting cylinder 500 is provided with a toggle port 520 communicated with the inner cavity of the limiting cylinder 500, the poking opening 520 is arranged along the length direction of the spring 600, a poking sheet 800 is arranged at the poking opening 520 of each limiting cylinder 500, one end of the toggle piece 800 is fixedly connected with the side wall of the limiting head 700, the other end of the toggle piece 800 extends to the outside of the limiting barrel 500 through the toggle port 520, since it is required to ensure that the distance between the two position-limiting heads 700 is greater than the distance of the first nut 210, the two position-limiting heads 700 can be respectively clamped into the position-limiting grooves 211 at both sides, and the setting of the dial opening 520 and the dial plate 800 can contract the limiting head 700 along the limiting cylinder 500, and then the distance between the two limiting heads 700 is increased, so that the requirement that a worker butt-joint, mounting and dismounting the limiting heads 700 from the first nuts 210 is met.

Further, the diameter of the first screw 110 is larger than the diameter of the second screw 120, that is, the inner diameter of the first nut 210 is larger than the diameter of the second screw 120, which is configured to ensure that the first nut 210 can directly pass through the second screw 120 to be in threaded engagement with the first screw 110.

Further, the minimum distance between the two limiting heads 700 is smaller than the distance between the two limiting grooves 211, so that the spring 600 is still in a compressed state even if the two limiting heads 700 are respectively clamped into the limiting grooves 211 on the two sides, so that when the spring 600 is vibrated externally, the limiting heads 700 on the two sides still can well clamp the first nut 210 under the elastic action of the spring 600, the limiting heads 700 are not easy to separate from the limiting grooves 211, and the first nut 210 and the second nut 220 are guaranteed to be mixed into an integrated structure which is restricted with each other and not easy to loosen.

Further, the bolt head 130 and the first nut 210 both adopt hexagonal nuts, which is convenient for a worker to rapidly disassemble the bolt head 130 and the first nut 210 with a wrench; the shape of the second nut 220 is not required as the second nut 220 can be rotated by a worker simply by grasping the collar 300.

The utility model provides a pair of locking fastener, when using, earlier through first nut 210 and bolt with two part fixed connection between first nut 210 and bolt head 130, then install second nut 220, move along the direction that is close to first nut 210 through constantly rotatory second nut 220, touch first nut 210 until spacing head 700, then stimulate the stirring piece 800 of both sides simultaneously, make the distance between two spacing heads 700 crescent, distance between two spacing heads 700 is greater than first nut 210's width, then continue rotatory second nut 220, in spacing groove 211 until two spacing heads 700 respectively the joint first nut 210 both sides, accomplish the installation of fastener. Compared with the prior art, the utility model has the advantages of: the structure of the conventional fastener is improved, the structure is simple, the bolt is designed into two sections of screws with different screwing directions, and the two nuts respectively arranged on the two sections of screws form an integrated and mutually restricted contradictory structure by utilizing the clamping connection of the limiting head 700 and the limiting groove 211, so that the two nuts are prevented from rotating along the same direction by utilizing the self-contradictory characteristics of threads, the mutual rotation between the bolt and the nut is prevented, the anti-loosening effect is further achieved, and the problem of poor loosening performance of the conventional fastener is solved.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. A loose-proof fastener, comprising a bolt, a first nut (210), a second nut (220), characterized in that:

the bolt is composed of a bolt head (130), a first screw rod (110) and a second screw rod (120) which are of an integrated structure, external threads are arranged on the outer periphery of the first screw rod (110) and the outer periphery of the second screw rod (120), the screwing direction of the external threads of the first screw rod (110) is opposite to that of the external threads of the second screw rod (120), two ends of the first screw rod (110) are fixedly connected with the bolt head (130) and the second screw rod (120) respectively, internal threads of a first nut (210) are matched with the external threads of the first screw rod (110), limiting grooves (211) are arranged on two sides of the side wall of the first nut (210), the opening directions of the two limiting grooves (211) are arranged in a back-to-facing mode, internal threads of the second nut (220) are matched with the external threads of the second screw rod (120), and enclosing plates (300) are arranged on two sides of the side wall of the second nut (220), the length direction of each enclosing plate (300) is the same as that of the second screw (120), each enclosing plate (300) is fixedly connected with the second nut (220) through a connecting plate (400), one end, close to the first screw (110), of each enclosing plate (300) is fixedly provided with a limiting barrel (500), the two limiting barrels (500) are symmetrically arranged about the center line of the bolt, each limiting barrel (500) is hollow, one end, close to the bolt, of each limiting barrel (500) is provided with an ejection port (510) communicated with the inner cavity of the limiting barrel (500), each limiting barrel (500) is internally provided with a fixedly connected spring (600) and a limiting head (700), one end, far away from the spring (600), of the limiting head (700) extends to the outside of the limiting barrel (500) through the ejection port (510), the end part of the limiting head (700) far away from the spring (600) is matched with the limiting groove (211).

2. A loose-proof fastener as claimed in claim 1, characterized in that:

each spacing section of thick bamboo (500) lateral wall all be equipped with the mouth (520) are moved in dialling that spacing section of thick bamboo (500) inner chamber is linked together, dial mouthful (520) and follow the length direction setting of spring (600), each spacing section of thick bamboo (500) are in dial mouthful (520) department and be equipped with stirring piece (800), stirring piece (800) one end with spacing head (700) lateral wall fixed connection, stirring piece (800) other end passes through dial mouthful (520) extend to spacing section of thick bamboo (500) outside.

3. A loose-proof fastener as claimed in claim 1, characterized in that:

the diameter of the first screw (110) is greater than the diameter of the second screw (120).

4. A loose-proof fastener as claimed in claim 1, characterized in that:

the minimum distance between the two limiting heads (700) is smaller than the distance between the two limiting grooves (211).

5. A loose-proof fastener as claimed in claim 1, characterized in that:

the bolt head (130) and the first nut (210) both adopt hexagonal nuts.