WO2022104936A1

WO2022104936A1 - Anti-loosening bolt fastener

Info

Publication number: WO2022104936A1
Application number: PCT/CN2020/134204
Authority: WO
Inventors: 崔路晋; 张琼; 张志鹏
Original assignee: 崔路晋
Priority date: 2020-11-17
Filing date: 2020-12-07
Publication date: 2022-05-27
Also published as: CN112303098B; CN112303098A

Abstract

Disclosed in the present invention is an anti-loosening bolt fastener. The fastener comprises: a bolt, a nut, and a fastening connection piece, wherein the fastening connection piece comprises a nut lock or a ring lock, a limiting mechanism is formed between recesses of the bolt and snap pieces of the nut lock, and a locking mechanism is formed between the nut lock and the nut, or a limiting mechanism is formed between the recesses of the bolt and the snap pieces of the ring lock. Compared with traditional fastening methods of existing bolts and nuts, the technical solution provided by the present invention is to achieve temporary locking between the bolt and the nut by means of the fastening connection piece, such that the problem of loosening of the nut due to vibration is solved.

Description

An anti-loosening bolt fastener

technical field

The invention relates to the technical field of bolt and nut connectors, in particular to an anti-loosening bolt fastener.

Background technique

The connection method of bolts and nuts is the most basic form of fastening connectors, and is widely used in mechanical equipment, automobiles, trains, aerospace and other fields. Fasteners have the advantages of convenient standardized mass production, simple structure, low cost, convenient installation, and easy disassembly. However, in the actual use process due to vibration, high and low load changes, impact or long-term working state, the nut is very easy to loosen, which directly affects the operation performance of the equipment and reduces its safety and reliability. Economic losses, severe cases will affect personal safety.

technical problem

In the prior art, due to the defects in the structural design of the fasteners and the lack of connection and anti-loosening components, after the bolts and the nuts are fastened and connected, the bolts and the nuts are still in a separate state, and only the helical wire is affected. Mutual restriction, and there is no connection restriction of other components between the bolt and the nut. Under the long-term external force vibration, the axial pre-tightening force increases, and the nut is very easy to rotate outward along the thread on the bolt, thereby forming a nut. The main reason for cap looseness.

technical solutions

Aiming at the deficiencies in the structural design of fasteners and the lack of connecting anti-loose parts in the prior art, the present invention provides a loose-proof bolt fastener.

In order to achieve the purpose of the above invention, the technical solution adopted in the present invention is an anti-loosening bolt fastener, including a bolt and a nut, wherein the bolt is composed of a bolt head and a bolt body, and the bolt body is provided with an external thread section and a nut. In the smooth section, the circular hole of the nut is provided with an internal thread corresponding to the external thread of the bolt body. There are bumps arranged intermittently, the length of the groove extends along the radial direction of the bolt to the smooth part of the bolt, and the depth of the groove is at least greater than the depth of the external thread of the bolt; it also includes a fastener for connecting the bolt and the nut. , a plurality of groups of snaps corresponding to the grooves are arranged on the fastening connector.

Further, the fastening connector includes a lock cap fastener or a lock ring fastener.

Further, the lock cap fastener is a hollow body that just passes through the circular hole of the bolt on the top wall, and a plurality of sets of fasteners corresponding to the bolt are arranged on the inner side of the circular hole of the lock cap fastener. The piece extends from the center of the horizontal hole to the bottom surface of the groove of the bolt, and is just clamped between two adjacent projections, and an annular groove or annular tooth is arranged on the inner wall of the cavity body.

Further, the nut is divided into two sections: a polygonal prism part and a cylindrical part, and an annular groove or an inner annular tooth is arranged on the periphery of the cylindrical part.

Further, after the lock cap fastener and the nut are combined and fit together, the annular teeth of the lock cap fastener and the annular groove of the nut are engaged with each other or the annular groove of the lock cap fastener and the annular tooth of the nut. They mesh with each other to prevent the lock cap fastener and the nut from sliding up and down relative to each other.

Further, the annular teeth and annular grooves may be arranged in a single group or in multiple groups.

Further, one end of the nut is provided with an annular groove with an inverted "T" shape in cross section, and the annular groove communicates with the end face of the nut.

Further, the lock ring fastener is a circular ring with a cross-section of "earth" shape, and a plurality of sets of hinged lock fasteners are evenly arranged on the ring, and the lock ring fastener is arranged in the ring groove and is opposite to the screw. The cap can be turned horizontally.

Further, the hinged lock includes a lock seat, a pin shaft, and a buckle, the lock seat is fixed on the ring, the buckle is provided with a through hole, and the pin is hinged to connect the buckle to the lock seat. , the clip can be flipped to the groove of the bolt.

Further, the cross section of the convex block is a right-angled trapezoid or a right-angled fan shape, the side of the protrusion facing the bolt head is a plane perpendicular to the bolt body, and the side facing away from the bolt head is an oblique folded surface or an arc surface.

beneficial effect

Compared with the traditional fastening methods of the existing bolts and nuts, the technical solution provided by the present invention is to temporarily lock the bolts and nuts after the fastening and connection together by the fastening connectors, and the nuts on the bolts are locked together temporarily. After tightening, put the lock cap through the bolt and put it on the nut. At this time, the limit teeth on the lock cap are just caught in the limit groove of the bolt and are located between the two adjacent bumps, forming the bolt and the nut. The limit mechanism between the nuts, at the same time, the annular grooves or annular teeth on the lock cap also just engage with the corresponding annular teeth or annular grooves on the nut to form a locking mechanism between the lock cap and the nut ; Or after the nut on the bolt is tightened, rotate the lock ring fastener to make the fastener align with the groove of the bolt, and turn it over and pull it into the groove of the bolt, and it is located between the two adjacent bumps. between the lock cap and the nut to form a locking mechanism.

This completes the temporary locking between the bolt and the nut. Therefore, the structural design defects of the fasteners and the lack of connecting anti-loosening parts are made up, and the problem of loosening due to vibration is solved from the main reason for the loosening of the nut.

Description of drawings

FIG. 1 is a schematic diagram of a bolt in the present invention.

FIG. 2 is a schematic diagram 1 of cutting a bolt in the present invention.

FIG. 3 is a second schematic diagram of a cut bolt in the present invention.

FIG. 4 is a schematic diagram of a nut and a locking cap fastener in the present invention.

FIG. 5 is a schematic diagram 1 of a cut-away lock cap according to the present invention.

FIG. 6 is a schematic diagram 1 of the cut nut in the present invention.

FIG. 7 is a second schematic view of the cut-away lock cap according to the present invention.

FIG. 8 is a second schematic diagram of the cut nut in the present invention.

FIG. 9 is a schematic diagram of the nut and the locking ring fastener in the present invention.

Fig. 10 is a schematic diagram 3 of the cut nut in the present invention.

Figure 11 is a schematic diagram of a cut ring in the present invention.

FIG. 12 is a schematic structural diagram of the lock ring fastener in the present invention.

Fig. 13 is an effect diagram of the combined use of the screw bolt and the lock cap fastener in the present invention.

FIG. 14 is an effect diagram of the combined use of the screw bolt and the locking ring fastener in the present invention.

In the figure: the bolt is 1, the groove is 101, the bump is 102, the bolt head is 103, the bolt body is 104, the nut is 2, the annular groove is 201, the cylinder part is 202, and the polygonal body part is 203 , the lock cap fastener is 3, the cavity body is 301, the circular hole is 302, the lock ring fastener is 4, the ring is 401, the hinge lock is 402, the lock seat is 4021, the pin is 4022, and the buckle is 402. The number of parts is 5, the ring tooth is 6, and the ring groove is 7.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be further described in detail below in conjunction with the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "Top", "Inner" and "Outer" refer respectively to the orientation of the geometric center of a particular part.

As shown in Figures 1 and 13, an anti-loosening bolt fastener includes a bolt 1 and a nut 2, wherein the bolt 1 consists of a bolt head 103 and a bolt body 104, and the bolt body 104 is provided with an external thread The inner thread corresponding to the outer thread of the bolt body 104 is arranged in the circular hole of the nut 2, and there are multiple groups of grooves 101 evenly arranged along the axial direction on the radial section of the bolt 1. The bottom surface of 101 is intermittently arranged with bumps 102, the length of the groove 101 extends along the radial direction of the bolt to the smooth part of the bolt 1, and the depth of the groove 101 is at least greater than the depth of the external thread of the bolt 1; it also includes bolts for movable connection Locking cap fastener with nut 3.

As shown in FIG. 3 , the cross section of the protrusion 102 is a right-angled trapezoid, the side of the protrusion facing the bolt head is a plane perpendicular to the bolt body, and the side facing away from the bolt head is an oblique folded surface.

As shown in FIGS. 4 and 5 , the lock cap fastener 3 has a hollow cavity 301 on the top wall that just passes through the bolt circular hole 302 . 1. Corresponding to a plurality of sets of clips 5, each clip 5 extends along the center of the horizontal circular hole 302 to the bottom surface of the groove 101 of the bolt 1, and is just caught between the two adjacent bumps 102. An annular groove 7 is provided on the inner wall of the cavity body 301 .

As shown in FIGS. 4 and 8 , the nut 2 is divided into two parts: a polygonal prism part and a cylindrical part, and the cylindrical part 202 is provided with annular teeth 6 on the periphery.

As shown in Figures 4 , 5 and 8 , after the lock cap fastener 3 and the nut 2 are combined and fit together, the annular groove 7 of the lock cap fastener 3 and the annular tooth 6 of the nut 2 are mutually connected. Engaged to prevent the lock cap fastener 3 and the nut 2 from sliding up and down relative to each other.

As shown in FIGS. 4 , 5 and 8 , the annular teeth 6 and the annular grooves 7 may be arranged in a single group or in multiple groups.

As shown in FIGS. 4 , 5 and 8 , the annular teeth 6 and the annular grooves 7 may be in the shape of continuous lines or strips, or may be in the shape of discontinuous dots.

The technical solution provided in this embodiment is to temporarily lock the fastened bolt and the nut together through the fastening connector, and after the nut on the bolt is tightened, the lock cap is inserted through the bolt and placed on the nut. At this time, the limit teeth on the lock cap are just stuck in the limit groove of the bolt and are located between the two adjacent bumps, forming a limit mechanism between the bolt and the nut. At the same time, the lock The annular grooves or annular teeth on the cap also just engage with the corresponding annular teeth or annular grooves on the nut to form a locking mechanism between the locking cap and the nut.

Embodiments of the present invention

Embodiment 2, as shown in Figures 1 and 13, an anti-loosening bolt fastener includes a bolt 1 and a nut 2, wherein the bolt 1 is composed of a bolt head 103 and a bolt body 104, and the bolt body 104 is composed of two parts. An external thread section and a smooth section are provided, the circular hole of the nut 2 is provided with an internal thread corresponding to the external thread of the bolt body 104, and a plurality of groups of grooves 101 are evenly arranged along the axial direction on the radial section of the bolt 1 , the bottom surface of the groove 101 is intermittently arranged with bumps 102, the length of the groove 101 extends along the radial direction of the bolt to the smooth part of the bolt 1, and the depth of the groove 101 is at least greater than the external thread depth of the bolt 1; The lock cap fastener 3 for the movable connection bolt and nut.

As shown in FIGS. 4 and 7 , the lock cap fastener 3 has a hollow cavity 301 on the top wall that just passes through the bolt circular hole 302 , and the inner side of the circular hole 302 of the lock cap fastener 3 is provided with a bolt 1. Corresponding to a plurality of sets of clips 5, each clip 5 extends along the center of the horizontal circular hole 302 to the bottom surface of the groove 101 of the bolt 1, and is just caught between the two adjacent bumps 102. The inner wall of the cavity body 301 is provided with annular teeth 6 .

As shown in FIGS. 4 and 6 , the nut 2 is divided into two sections: a polygonal prism part and a cylindrical part, and an annular groove 7 is provided on the periphery of the cylindrical part 202 .

As shown in Figures 4 , 6 and 7 , after the lock cap fastener 3 and the nut 2 are combined and fit together, the ring teeth 6 of the lock cap fastener 3 and the annular groove 7 of the nut 2 are mutually connected. Engaged to prevent the lock cap fastener 3 and the nut 2 from sliding up and down relative to each other.

As shown in FIGS. 4 , 6 and 7 , the annular teeth 6 and the annular grooves 7 may be arranged in a single group or in multiple groups.

As shown in FIGS. 4 , 6 and 7 , the annular teeth 6 and the annular grooves 7 may be in the shape of continuous lines or strips, or may be in the shape of intermittent dots.

Embodiment 3, as shown in Figures 1, 9 and 14, an anti-loosening bolt fastener includes a bolt 1 and a nut 2, wherein the bolt 1 consists of a bolt head 103 and a bolt body 104. The bolt body is composed of two parts. 104 is provided with an external thread segment and a smooth segment, the circular hole of the nut 2 is provided with an internal thread corresponding to the external thread of the bolt body 104, and a plurality of groups of concave grooves are evenly arranged along the axial direction on the radial section of the bolt 1. The groove 101 is intermittently arranged with bumps 102 on the bottom surface of the groove 101, the length of the groove 101 extends along the radial direction of the bolt to the smooth part of the bolt 1, and the depth of the groove 101 is at least greater than the depth of the external thread of the bolt 1; Includes locking ring fasteners 4 for connecting bolts and nuts.

As shown in FIG. 10 , one end of the nut 2 is provided with an annular groove 201 with an inverted “T” shape in cross section, and the annular groove 201 communicates with the end face of the nut 2 .

As shown in FIG. 11 , the lock ring fastener 4 is a circular ring 401 with a “earth” shape in cross section, and a plurality of sets of hinged lock fasteners 402 are evenly arranged on the circular ring 401 . The lock ring fastener 4 It is arranged in the annular groove 201 and can be rotated horizontally relative to the nut 2 .

As shown in FIG. 12 , the hinged lock 402 includes a lock seat 4021, a pin shaft 4022, and a buckle 5. The lock seat 4021 is fixed on the ring 401, and the buckle 5 is provided with a through hole. The shaft 4022 hinges the clip 5 to the lock seat 4021 , and the clip 5 can be turned over and pulled to the groove 201 of the bolt 1 .

The technical solution provided in this embodiment is to temporarily lock the fastened bolt and the nut together by tightening the connector, and after the nut on the bolt is tightened, the locking ring fastener is rotated to make the locking The parts are aligned with the grooves of the bolts, and are turned over and pulled into the grooves of the bolts, and are located between two adjacent projections to form a locking mechanism between the lock cap and the nut.

Embodiment 4, as shown in Figures 1 and 13, an anti-loosening bolt fastener includes a bolt 1 and a nut 2, wherein the bolt 1 is composed of a bolt head 103 and a bolt body 104, and the bolt body 104 is composed of two parts. An external thread section and a smooth section are provided, the circular hole of the nut 2 is provided with an internal thread corresponding to the external thread of the bolt body 104, and a plurality of groups of grooves 101 are evenly arranged along the axial direction on the radial section of the bolt 1 , the bottom surface of the groove 101 is intermittently arranged with bumps 102, the length of the groove 101 extends along the radial direction of the bolt to the smooth part of the bolt 1, and the depth of the groove 101 is at least greater than the external thread depth of the bolt 1; The lock cap fastener 3 for the movable connection bolt and nut.

As shown in FIG. 2 , the cross section of the convex block 102 is a right angle sector, the side of the convex block facing the bolt head is a plane perpendicular to the bolt body, and the side facing away from the bolt head is an arc surface.

The technical solution provided by the present invention is to temporarily lock the fastened bolt and the nut together through the fastening connector, and after the nut on the bolt is tightened, the lock cap is inserted through the bolt and sleeved on the nut. , at this time, the limit teeth on the lock cap are just stuck in the limit groove of the bolt and between the two adjacent bumps, forming a limit mechanism between the bolt and the nut. At the same time, the lock cap The annular grooves or annular teeth on the nut also just engage with the corresponding annular teeth or annular grooves on the nut to form a locking mechanism between the locking cap and the nut.

Embodiment 5, as shown in Figures 1 and 13, an anti-loosening bolt fastener includes a bolt 1 and a nut 2, wherein the bolt 1 is composed of a bolt head 103 and a bolt body 104, and the bolt body 104 is composed of two parts. An external thread section and a smooth section are provided, the circular hole of the nut 2 is provided with an internal thread corresponding to the external thread of the bolt body 104, and a plurality of groups of grooves 101 are evenly arranged along the axial direction on the radial section of the bolt 1 , the bottom surface of the groove 101 is intermittently arranged with bumps 102, the length of the groove 101 extends along the radial direction of the bolt to the smooth part of the bolt 1, and the depth of the groove 101 is at least greater than the external thread depth of the bolt 1; The lock cap fastener 3 for the movable connection bolt and nut.

Embodiment 6, as shown in Figures 1, 9 and 14, an anti-loosening bolt fastener includes a bolt 1 and a nut 2, wherein the bolt 1 consists of a bolt head 103 and a bolt body 104. The bolt body is composed of two parts. 104 is provided with an external thread segment and a smooth segment, the circular hole of the nut 2 is provided with an internal thread corresponding to the external thread of the bolt body 104, and a plurality of groups of concave grooves are evenly arranged along the axial direction on the radial section of the bolt 1. The groove 101 is intermittently arranged with bumps 102 on the bottom surface of the groove 101, the length of the groove 101 extends along the radial direction of the bolt to the smooth part of the bolt 1, and the depth of the groove 101 is at least greater than the depth of the external thread of the bolt 1; Includes locking ring fasteners 4 for connecting bolts and nuts.

Of course, in Embodiments 1, 2, 4, and 5, chemical glue can also be used to bond between the nut 2 and the locking cap fastener 3 to achieve a temporary locking effect.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. Not all embodiments can be exemplified here. Any modification, equivalent replacement and improvement made within the design idea of the present invention shall be included within the protection scope of the claims of the present invention.

Industrial Applicability

The technical solution provided by the present invention is to temporarily lock the fastened bolt and the nut together through the fastening connector, and after the nut on the bolt is tightened, the lock cap is inserted through the bolt and sleeved on the nut. , at this time, the limit teeth on the lock cap are just stuck in the limit groove of the bolt and between the two adjacent bumps, forming a limit mechanism between the bolt and the nut. At the same time, the lock cap The annular grooves or annular teeth on the nut also just engage with the corresponding annular teeth or annular grooves on the nut to form a locking mechanism between the lock cap and the nut; Ring the fastener, so that the fastener is aligned with the groove of the bolt, and is turned over and pulled into the groove of the bolt, and is located between two adjacent protrusions to form a locking mechanism between the lock cap and the nut.

Claims

An anti-loosening bolt fastener, comprising a bolt (1) and a nut (2), wherein the bolt (1) is composed of a bolt head (103) and a bolt body (104), and the bolt body (104) is provided with There is an external thread section and a smooth section, and the circular hole of the nut (2) is provided with an internal thread corresponding to the external thread of the bolt body (104). A plurality of groups of grooves (101) are evenly arranged in the direction, and bumps (102) are intermittently arranged on the bottom surface of the grooves (101), and the length of the grooves (101) extends along the radial direction of the bolt to the smoothness of the bolt (1). part, the depth of the groove (101) is at least greater than the depth of the external thread of the bolt (1); it also includes a fastening connector for the flexible connection of the bolt and the nut, and the fastening connector is provided with the groove (101) Corresponding sets of snap fasteners (5).
An anti-loosening bolt fastener according to claim 1, characterized in that, the fastening connection member comprises a lock cap fastener (3) or a lock ring fastener (4).
An anti-loosening bolt fastener according to claim 2, characterized in that the lock cap fastener (3) is a hollow body (301) on the top wall that just passes through the bolt circular hole (302), A plurality of sets of clips (5) corresponding to the bolts (1) are arranged on the inner side of the circular hole (302) of the lock cap fastener (3), and each clip (5) is arranged along the center of the horizontal circular hole (302). Extending to the bottom surface of the groove (101) of the bolt (1), and just stuck between the two adjacent projections (102), an annular groove (7) or Ring teeth (6).
An anti-loosening bolt fastener according to claim 2 or 3, characterized in that the nut (2) is divided into two sections: a polygonal prism part and a cylindrical part, and a peripheral part of the cylindrical part (202) is provided with Annular groove (7) or annular tooth (6).
An anti-loosening bolt fastener according to claim 4, characterized in that, after the lock cap fastener (3) and the nut (2) are combined and fit together, they pass through the annular shape of the lock cap fastener (3). The tooth (6) and the annular groove (7) of the nut (2) are engaged with each other or the annular groove (7) of the locking cap fastener (3) and the annular tooth (6) of the nut (2) are engaged with each other. , to prevent the lock cap fastener (3) and the nut (2) from sliding up and down relative to each other.
An anti-loosening bolt fastener according to claim 5, characterized in that the annular teeth (6) and the annular grooves (7) can be arranged in a single group or in multiple groups.
An anti-loosening bolt fastener according to claim 2, characterized in that, one end of the nut (2) is provided with a circular groove (201) whose cross section is an inverted "T" shape, and the circular groove (201) ) communicates with the end face of the nut (2).
An anti-loosening bolt fastener according to claim 7, characterized in that the locking ring fastener (4) is a circular ring (401) with a "earth"-shaped cross-section, and the ring (401) A plurality of sets of hinged locking buckles (402) are evenly arranged on the upper surface, and the locking ring buckles (4) are arranged in the annular groove (201) and can rotate horizontally relative to the nut (2).
An anti-loosening bolt fastener according to claim 8, characterized in that the hinged lock (402) comprises a lock seat (4021), a pin (4022), a buckle (5), and the lock seat (4021) is fixed on the ring (401), the clip (5) is provided with a through hole, the pin (4022) hinges the clip (5) on the lock seat (4021), and the clip (4021) (5) The groove (201) of the bolt (1) can be turned over and pulled.
An anti-loosening bolt fastener according to claim 1, characterized in that the cross section of the projection (102) is a right-angled trapezoid or a right-angled sector, and the side of the projection (102) facing the bolt head (103) is perpendicular to the The plane of the bolt body (104), and the side facing away from the bolt head (103) is an oblique folded surface or an arc surface.