CN209977046U

CN209977046U - Self-locking and anti-loosening fastener

Info

Publication number: CN209977046U
Application number: CN201920856760.0U
Authority: CN
Inventors: 金法银
Original assignee: Zhejiang Ring Precision Machinery Ltd By Share Ltd
Current assignee: Zhejiang Ring Precision Machinery Ltd By Share Ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-01-21
Anticipated expiration: 2029-06-06

Abstract

The utility model provides a locking fastener of auto-lock relates to the fastener field. The self-locking and anti-loosening fastener comprises a fastener, a sleeve and a fastening bolt, wherein the sleeve is arranged at the central position of the upper surface of the fastener, the sleeve comprises an external thread, an internal thread and a limiting groove, the external thread is arranged on the outer surface of the sleeve, the internal thread is arranged in the inner cavity of the sleeve, and the limiting groove is arranged on the inner circumferential surface of the top end of the sleeve. This locking fastener of auto-lock is provided with external screw thread and internal thread inside and outside the sleeve respectively, and both rotation direction are opposite, and when the internal thread was forward screw thread promptly, then the external screw thread was reverse screw thread, otherwise does, when assembling, fastening bolt's screw thread and external screw thread opposite direction, and the not hard up direction of external screw thread is internal thread locking direction, and pitch varies, can not become flexible simultaneously to through two-layer screw thread interlocking, effectively realize the locking function of auto-lock.

Description

Self-locking and anti-loosening fastener

Technical Field

The utility model relates to a fastener technical field specifically is a locking fastener of auto-lock.

Background

The bolt is a common fastener, is widely used in various mechanical and electrical equipment, has no strict requirement on the anti-loosening property of the bolt for common application occasions, but for the fields of automobiles, aviation, aerospace, nuclear power plants and the like, a plurality of equipment or parts work in a vibration environment for a long time, and the bolt and the nut are easy to loosen, so that the normal work of the equipment is influenced, and even safety accidents can be caused;

for solving the locking problem of bolt, various self-locking nuts have appeared in the current fastener trade, and its structure is complicated, and manufacturing cost is high, and the installation is inconvenient moreover, and the unsatisfactory lamp problem of locking effect is to not enough among the prior art, the utility model discloses a locking fastener of auto-lock that excellent in use effect.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a locking fastener of auto-lock has solved the current complicated, the unsatisfactory problem of locking effect of fastener structure.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the self-locking and anti-loosening fastener comprises a fastener, a sleeve and a fastening bolt, wherein the sleeve is arranged at the central position of the upper surface of the fastener in a disposal mode, the sleeve comprises an external thread, an internal thread and a limiting groove, the external thread is formed in the outer surface of the sleeve, the internal thread is formed in the inner cavity of the sleeve, and the limiting groove is formed in the inner circumferential surface of the top end of the sleeve.

The utility model discloses a fastening bolt, including fastening bolt, limiting spring, compression spring, connecting plate, compression spring, bottom fixed connection in spacing hole, fastening bolt's threaded end is twisted and is provided with stop gear with the corresponding position in spacing groove, stop gear includes spacing hole, connecting plate, stopper and compression spring, fastening bolt's surface has seted up spacing hole along fastening bolt axle center department, the vertical connecting plate that sets up in inside in spacing hole, the annular surface and the spacing downthehole wall sliding connection of connecting plate, one side and the stopper welded fastening of connecting plate, the opposite side and the compression spring fixed connection of connecting plate, compression spring's the one end of keeping away from the connecting plate and the bottom fixed connection in spacing hole, fastening bolt's screw thread department cup joints with the backing ring activity, the diameter.

Preferably, the lower surface of the fastener is provided with a hexagonal threaded hole.

Preferably, the thread direction of the external thread is counterclockwise, the thread direction of the internal thread is clockwise, and the thread pitch of the external thread is greater than that of the internal thread.

Preferably, the compression spring is in a compressed state when the connection is tightened.

Preferably, the lower surface of the backing ring is provided with ratchet teeth.

Preferably, one side of the limiting block, which is far away from the connecting plate, is arc-shaped and is matched with the inside of the limiting groove.

Preferably, the pitch of the fastening bolt is the same as the pitch of the internal thread.

The utility model provides a locking fastener of auto-lock, its beneficial effect who possesses as follows:

1. this locking fastener of auto-lock, through setting up fastening bolt, the sleeve, internal thread and external screw thread, be provided with external screw thread and internal thread inside and outside the sleeve respectively, and both rotation direction are opposite, when the internal thread is forward screw thread promptly, then the external thread is reverse screw thread, otherwise does, when assembling, fastening bolt's screw thread and external screw thread opposite direction, the not hard up direction of external thread is internal screw thread locking direction, and pitch varies, can not become flexible simultaneously, thereby through two-layer screw thread interlocking, effectively realize auto-lock locking function.

2. This locking fastener of auto-lock, through setting up backing ring, ratchet, spacing groove, spacing hole, connecting plate, stopper and compression spring, area of contact when the backing ring increases the erection joint makes its contact more stable, and ratchet and the mutual interlock of connecting piece simultaneously increase frictional resistance, stopper and spacing groove aim at and are connected, and fastening bolt rotates the inside shrink of in-process stopper atress to spacing hole for it is more convenient to aim at during the assembly, and assembly efficiency is higher.

Drawings

FIG. 1 is a sectional view of the present invention;

FIG. 2 is a sectional view of the limiting mechanism of the present invention;

FIG. 3 is an enlarged view of the portion A of the novel body 1;

fig. 4 is a bottom view of the fastener structure of the present invention;

FIG. 5 is a bottom view of the grommet structure of the present invention;

fig. 6 is a schematic structural diagram of the present invention.

In the figure: the device comprises a fastening piece 1, a hexagonal threaded hole 11, a sleeve 2, an external thread 21, an internal thread 22, a limiting groove 23, a fastening bolt 3, a limiting mechanism 4, a limiting hole 41, a connecting plate 42, a limiting block 43, a compression spring 44, a backing ring 5 and a ratchet 51.

Detailed Description

The embodiment of the utility model provides a self-locking and anti-loosening fastener, as shown in fig. 1-6, including fastener 1, sleeve 2 and fastening bolt 3, hexagonal threaded hole 11 is opened on the lower surface of fastener 1, the upper surface central point of fastener 1 is disposed and is provided with sleeve 2, sleeve 2 includes external screw thread 21, internal thread 22 and spacing groove 23, external screw thread 21 is opened on the surface of sleeve 2, the thread direction of external screw thread 21 is anticlockwise, the thread direction of internal thread 22 is clockwise, and the pitch of external screw thread 21 is greater than the pitch of internal thread 22, the screw thread of fastening bolt 3 is opposite to the direction of external screw thread 21, the loosening direction of external screw thread 21 is the locking direction of internal thread 22, and the pitch is unequal, can not loosen simultaneously, thereby through two-layer thread interlocking, effectively realize self-locking function, and then make fastening bolt 3 and sleeve 2 form one and can relatively rotate but can, an inner cavity of the sleeve 2 is provided with an inner thread 22, an inner peripheral surface of a top end of the sleeve 2 is provided with a limit groove 23, a threaded end of a fastening bolt 3 is in threaded connection with the inner thread 22 of the sleeve 2, a thread pitch of the fastening bolt 3 is the same as that of the inner thread 22, a position, corresponding to the limit groove 23, of the threaded end of the fastening bolt 3 is screwed with a limit mechanism 4, the limit mechanism 4 comprises a limit hole 41, a connecting plate 42, a limit block 43 and a compression spring 44, the outer surface of the fastening bolt 3 is provided with the limit hole 41 along an axis of the fastening bolt 3, the connecting plate 42 is vertically arranged inside the limit hole 41, an annular outer surface of the connecting plate 42 is in sliding connection with an inner wall of the limit hole 41, one side of the connecting plate 42 is fixedly welded with the limit block 43, one side of the limit block 43, which, the thread end of the fastening bolt 3 is aligned with the limiting groove 23 at the top of the inner cavity of the sleeve 2, the limiting block 23 is stressed to contract towards the inside of the limiting hole 41 in the rotating process of the fastening bolt 3, the limiting block 23 and the limiting mechanism 4 provide axial matching treatment when the fastening bolt 3 is in threaded connection with the sleeve 2, the fastening bolt 3 is prevented from deviating from the sleeve 2, the alignment is more convenient in assembly, the assembly efficiency is higher, the compression spring 44 belongs to a compression state in fastening connection, one end of the compression spring 44, far away from the connecting plate 42, is fixedly connected with the bottom of the limiting hole 41, the thread part of the fastening bolt 3 is movably sleeved with the backing ring 5, the lower surface of the backing ring 5 is provided with the ratchet 51, the diameter of the backing ring 5 is larger than the diameter of the nut of the fastening bolt 3, the backing ring 5 increases the contact area in assembly connection, the contact of the backing ring is, increasing the frictional resistance.

Firstly, this locking fastener of auto-lock, through setting up fastening bolt 3, sleeve 2, internal thread 22 and external screw thread 21, be provided with external screw thread 21 and internal thread 22 inside and outside sleeve 2 respectively, and both rotation direction is opposite, when internal thread 22 is forward screw thread promptly, then external thread 21 is reverse screw thread, vice versa can, when assembling, fastening bolt 2's screw thread and external screw thread 21 opposite direction, the not hard up direction of external screw thread 21 is internal thread 22's locking direction, and the pitch varies, can not become flexible simultaneously, thereby through two-layer screw thread interlocking, effectively realize the locking function of auto-lock.

Secondly, this locking fastener of auto-lock, through setting up backing ring 5, ratchet 51, spacing groove 23, spacing hole 41, connecting plate 42, stopper 43 and compression spring 44, area of contact when backing ring 5 increases the be assembled between/be connected between, it is more stable to make its contact, ratchet 51 and the mutual interlock of connecting piece simultaneously, increase frictional resistance, stopper 43 and spacing groove 23 aim at and are connected, fastening bolt 3 rotates the inside shrink of in-process stopper 43 atress to spacing hole 41, it is more convenient to aim at during the feasible assembly, assembly efficiency is higher.

The working principle is as follows: when the device is used, firstly, a fastening piece 1 and a sleeve 2 are fixed at the position of an internal through hole of an object to be connected, the fastening piece 1 and the sleeve 2 are driven to rotate by rotating a hexagonal threaded hole 11, then the threaded end of a fastening bolt 3 is aligned with a limiting groove 23 at the top of an inner cavity of the sleeve 2, the limiting block 23 is stressed to shrink towards the inside of a limiting hole 41 in the rotating process of the fastening bolt 3, the limiting block 23 and a limiting mechanism 4 provide pairing treatment in the axial direction when the fastening bolt 3 is in threaded connection with the sleeve 2, the fastening bolt 3 is prevented from deviating from the sleeve 2, so that the alignment is more convenient in assembly, the assembly efficiency is higher, the thread of the fastening bolt 3 is opposite to the direction of an external thread 21, the loosening direction of the external thread 21 is the locking direction of an internal thread 22, the thread pitches are unequal, the loosening cannot be simultaneously loosened, thereby the self-locking, making the contact more stable and at the same time the ratchet teeth 51 engage with the connector surface, increasing the frictional resistance.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a locking fastener of auto-lock, includes fastener (1), sleeve (2) and fastening bolt (3), its characterized in that: a sleeve (2) is arranged at the central position of the upper surface of the fastener (1), the sleeve (2) comprises an external thread (21), an internal thread (22) and a limiting groove (23), the external thread (21) is arranged on the outer surface of the sleeve (2), the internal thread (22) is arranged in the inner cavity of the sleeve (2), and the limiting groove (23) is arranged on the inner circumferential surface of the top end of the sleeve (2);

the threaded end of the fastening bolt (3) is in threaded connection with the internal thread (22) of the sleeve (2), a limiting mechanism (4) is arranged at a position corresponding to the limiting groove (23) when the threaded end of the fastening bolt (3) is screwed, the limiting mechanism (4) comprises a limiting hole (41), a connecting plate (42), a limiting block (43) and a compression spring (44), the limiting hole (41) is formed in the outer surface of the fastening bolt (3) and along the axis of the fastening bolt (3), the connecting plate (42) is vertically arranged inside the limiting hole (41), the annular outer surface of the connecting plate (42) is in sliding connection with the inner wall of the limiting hole (41), one side of the connecting plate (42) is fixedly welded with the limiting block (43), the other side of the connecting plate (42) is fixedly connected with the compression spring (44), and one end, far away from the connecting plate (42), of the compression spring (44) is fixedly connected with the bottom of the limiting hole (, the thread of the fastening bolt (3) is movably sleeved with the backing ring (5), and the diameter of the backing ring (5) is larger than the diameter of a nut of the fastening bolt (3).

2. The self-locking anti-loose fastener according to claim 1, characterized in that: the lower surface of the fastener (1) is provided with a hexagonal threaded hole (11).

3. The self-locking anti-loose fastener according to claim 1, characterized in that: the thread direction of the external thread (21) is anticlockwise, the thread direction of the internal thread (22) is clockwise, and the thread pitch of the external thread (21) is greater than that of the internal thread (22).

4. The self-locking anti-loose fastener according to claim 1, characterized in that: the compression spring (44) is in a compressed state when the connection is tightened.

5. The self-locking anti-loose fastener according to claim 1, characterized in that: the lower surface of the backing ring (5) is provided with a ratchet (51).

6. The self-locking anti-loose fastener according to claim 1, characterized in that: one side of the limiting block (43) far away from the connecting plate (42) is arc-shaped and is matched with the inside of the limiting groove (23).

7. The self-locking anti-loose fastener according to claim 1, characterized in that: the thread pitch of the fastening bolt (3) is the same as the thread pitch of the internal thread (22).