CN215171435U

CN215171435U - Novel locking device

Info

Publication number: CN215171435U
Application number: CN202120281191.9U
Authority: CN
Inventors: 佘占蛟; 刘光清; 姚峰林; 王俊飞
Original assignee: Nanchong Vocational and Technical College
Current assignee: Nanchong Vocational and Technical College
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-12-14
Anticipated expiration: 2031-02-01

Abstract

The utility model relates to the technical field of fasteners, in particular to a novel locking device, which comprises a bolt, a first nut and an anti-rotation device, wherein the head part of the bolt is attached to a connecting piece to be connected, the tail part of the bolt passes through the connecting piece to be connected and penetrates out from one end of the connecting piece to be connected, the first nut is connected with the threaded end of the bolt, one side end surface of the first nut is attached to the connecting piece to be connected, the anti-rotation device is sleeved on the threaded end of the bolt, and one end of the anti-rotation device is abutted to the upper end surface of the first nut; and gear-shaped external teeth are arranged on the end surface of the outer side of the first nut. The utility model discloses simple structure can realize reliable locking, and the outline of nut sets up to the gear shape to the design has special utensil of turning round, and nut outline intensity is high, and the area of contact who turns round utensil and nut is big, and the unit area atress is little, and gear nut atress is even not fragile appearance.

Description

Novel locking device

Technical Field

The utility model relates to a fastener technical field, more specifically say, relate to a novel locking device.

Background

In mechanical equipment, a bolt and a nut are the most commonly used fasteners, and because a certain vibration is generated during the operation of the machine, the bolt and the nut are often loosened after a period of use, but the equipment cannot work normally due to the looseness.

The existing nut is mostly a hexagon nut, and when the nut is screwed tightly, the nut is easily screwed into a circle by a wrench, so that the nut cannot be detached.

Therefore, there is a need for improvements in the prior art.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the novel locking device with the anti-loosening function and the structure not easy to damage is provided.

In order to solve the technical problem, the utility model discloses a technical scheme be:

a novel locking device comprises a bolt, a first nut and an anti-rotation device, wherein the head of the bolt is attached to a to-be-connected piece, the tail of the bolt penetrates through the to-be-connected piece and penetrates out of one end of the to-be-connected piece, the first nut is connected with the threaded end of the bolt, one side end face of the first nut is attached to the to-be-connected piece, the anti-rotation device is sleeved on the threaded end of the bolt, and one end of the anti-rotation device is abutted to the upper end face of the first nut;

and gear-shaped external teeth are arranged on the end surface of the outer side of the first nut.

Furthermore, anti-rotation device includes locking sleeve and split pin, and the screwed end of bolt is provided with through-hole I along the direction of perpendicular to bolt axis, locking sleeve sets up at the screwed end of bolt and inconsistent with first nut, be provided with on the locking sleeve with I matched with through-hole II of through-hole, the split pin passes through-hole I simultaneously and through-hole II with locking sleeve and bolt fastening.

Further, still include the utensil of turning round, the utensil of turning round includes handle and work end, the work end is semi-circular, and semi-circular inner wall is provided with the internal tooth with external tooth matched with.

Further, anti-rotation device includes the second nut, be provided with the ladder screw thread on the bolt, the ladder screw thread includes the coarse pitch screw thread that is close to bolt head one side and the fine pitch screw thread that is close to bolt tail one side, the coarse pitch screw thread of first nut and bolt cooperatees, and when the one side of first nut supported tightly and treats the connecting piece, the coarse pitch screw thread did not surpass the another side of first nut, the second nut cooperatees with the fine pitch screw thread and offsets tightly with first nut.

Further, gear-shaped external teeth are provided on the outer end surface of the second nut.

Furthermore, still including preventing the rotor plate, it is provided with two at least archs to prevent rotor plate edge, prevent that the rotor plate sets up between first nut and second nut, prevent that the arch of rotor plate bends and block in the tooth's socket that corresponds to the direction of first nut and second nut respectively.

Furthermore, a spherical bulge is arranged on the surface of the bolt head of the bolt, which is in contact with the to-be-connected piece.

Compared with the prior art, the utility model beneficial effect who has does:

1. traditional hexagon nut outline is the hexagon, when using the spanner to twist it and move, because the stress surface is little, twists into the outline cylindrically very easily for the nut is difficult to be torn open, the utility model discloses set up the outline of nut into the gear shape to the design has special utensil soon, and nut outline intensity is high, and the area of contact who possesses and the nut soon is big, and the unit area atress is little, and the even not fragile appearance of gear nut atress.

2. The utility model discloses a two nut designs that the pitch is different to one side that is close to the bolt head uses the coarse pitch nut, and one side of keeping away from the bolt head uses little pitch nut, makes two nuts can not be simultaneously by the back-off, reduces not hard up risk.

3. The utility model discloses set up between first nut and second nut and prevent the rotor, further restrict first nut and second nut and rotate relatively, guarantee locking structure's stability.

Drawings

The following will explain in further detail embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic view of the structure of the screwdriver of the present invention;

fig. 3 is a schematic structural diagram of embodiment 3 of the present invention;

FIG. 4 is a schematic structural view of a first nut;

FIG. 5 is a schematic structural view of the anti-rotation sheet;

fig. 6 is a schematic structural view of the bolt of the present invention.

In the figure: 1-bolt, 2-first nut, 3-anti-loose sleeve, 4-cotter pin, 5-screwdriver, 6-second nut, 7-large pitch thread, 8-small pitch thread, 9-anti-rotation piece, 10-bulge, 11-spherical bulge, 12-through hole I, 13-through hole II.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

as shown in fig. 1 to 2, a novel locking device comprises a bolt 1, a first nut 2, a locking sleeve 3 and a split pin 4, wherein the head of the bolt 1 is attached to a to-be-connected piece, the tail of the bolt 1 penetrates through the to-be-connected piece and penetrates out of one end of the to-be-connected piece, the first nut 2 is connected with the threaded end of the bolt 1, and one side end face of the first nut 2 is attached to the to-be-connected piece;

the outer side end face of the first nut 2 is provided with gear-shaped external teeth.

The direction of bolt 1's thread end along perpendicular to bolt 1 axis is provided with through-hole I12, locking sleeve 3 sets up at bolt 1's thread end and inconsistent with first nut 2, is provided with on the locking sleeve 3 with I12 matched with through-hole II 13 of through-hole, split pin 4 passes through I12 of through-hole and II 13 of through-hole simultaneously and fixes locking sleeve 3 and bolt 1. The axial movement of the first nut 2 is restricted by the cotter 4 and the anti-loosening sleeve 3, thereby preventing the bolt 1 from loosening from the first nut 2.

The screwdriver 5 comprises a handle and a working end, the working end is semicircular, and inner teeth matched with the outer teeth are arranged on the inner wall of the semicircle.

The outer contour of the first nut is set to be in a gear shape, a special screwdriver 5 is designed, the strength of the outer contour of the nut is high, the contact area between the screwdriver and the nut is large, the stress of a unit area is small, and the gear nut is uniform in stress and not easy to damage in appearance.

Example 2:

as shown in fig. 3 to 6, a novel locking device is different from embodiment 1 in that: the locking sleeve 3 and the split pin 4 are removed, the bolt 1 is provided with stepped threads, the stepped threads comprise large-pitch threads 7 close to one side of a bolt head and small-pitch threads 8 close to one side of a bolt tail, the first nut 2 is matched with the large-pitch threads 7 of the bolt, when one surface of the first nut 2 is abutted against the connecting piece, the large-pitch threads 7 do not exceed the other surface of the first nut 2, the locking sleeve further comprises a second nut 6, and the second nut 6 is matched with the small-pitch threads 8.

The anti-rotation piece 9 is arranged between the first nut 2 and the second nut 6, at least two bulges 10 are arranged on the edge of the anti-rotation piece 9, and the bulges 10 of the anti-rotation piece 9 are respectively bent towards the first nut 2 and the second nut 6 and clamped in the corresponding tooth grooves.

Through adopting the different double nut design of pitch to the one side that is close to the bolt head uses the coarse pitch nut, and the one side of keeping away from the bolt head uses the fine pitch nut, makes two nuts can not be unscrewed simultaneously, reduces not hard up risk.

Be provided with between first nut and the second nut and prevent changeing the piece, further restrict first nut and second nut and rotate relatively, guarantee locking structure's stability.

The outer end face of the second nut 6 is provided with gear-shaped external teeth.

The surface of the bolt head of the bolt 1, which is contacted with the part to be connected, is provided with a spherical bulge 11, so that the bolt and the part to be connected are prevented from rotating mutually.

The above description has been made in detail only for the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art, and all such changes are intended to be encompassed by the present invention.

Claims

1. A novel locking device is characterized in that: the anti-rotation bolt comprises a bolt (1), a first nut (2) and an anti-rotation device, wherein the head of the bolt (1) is attached to a to-be-connected piece, the tail of the bolt (1) penetrates through the to-be-connected piece and penetrates out of one end of the to-be-connected piece, the first nut (2) is connected with the threaded end of the bolt (1), one side end face of the first nut (2) is attached to the to-be-connected piece, the anti-rotation device is sleeved on the threaded end of the bolt (1), and one end of the anti-rotation device is abutted to the upper end face of the first nut (2);

and gear-shaped external teeth are arranged on the end surface of the outer side of the first nut (2).

2. A novel locking device according to claim 1, characterized in that: anti-rotation device includes locking sleeve (3) and split pin (4), and the screw end of bolt (1) is provided with through-hole I (12) along the direction of perpendicular to bolt (1) axis, locking sleeve (3) set up at the screw end of bolt (1) and inconsistent with first nut (2), be provided with on locking sleeve (3) with I (12) matched with through-hole II (13) of through-hole, split pin (4) pass through I (12) of through-hole and II (13) of through-hole simultaneously and are fixed locking sleeve (3) and bolt (1).

3. A novel locking device according to claim 1, characterized in that: anti-rotation device includes second nut (6), be provided with the ladder screw thread on bolt (1), the ladder screw thread includes coarse pitch screw thread (7) that are close to bolt head one side and fine pitch screw thread (8) that are close to bolt tail one side, first nut (2) cooperatees with the coarse pitch screw thread (7) of bolt, and when the one side of first nut (2) supported tightly and treats the connecting piece, coarse pitch screw thread (7) do not surpass the another side of first nut (2), second nut (6) cooperatees with fine pitch screw thread (8) and offsets tightly with first nut (2).

4. A novel locking device according to claim 3, characterized in that: and gear-shaped external teeth are arranged on the outer side end face of the second nut (6).

5. A novel locking device according to claim 3, characterized in that: still including preventing rotor plate (9), it is provided with two at least archs (10) to prevent rotor plate (9) edge, prevent that rotor plate (9) set up between first nut (2) and second nut (6), prevent that arch (10) of rotor plate (9) bend and block in corresponding tooth's socket to the direction of first nut (2) and second nut (6) respectively.

6. A novel locking device according to claim 1, characterized in that: a spherical bulge (11) is arranged on the surface of the bolt head of the bolt (1) which is in contact with the connecting piece to be connected.