CN214367148U

CN214367148U - Self-locking bolt fastening device

Info

Publication number: CN214367148U
Application number: CN202022611739.XU
Authority: CN
Inventors: 孙万鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-10-08
Anticipated expiration: 2030-11-12

Abstract

The utility model discloses a from locking bolt fastening device relates to a fastener. Under the action of impact, vibration or variable load, the common bolt connection can be loosened and even completely separated, so that safety accidents are caused. The utility model comprises a special-shaped bolt, a rotation stopping washer and a rotation stopping nut; the rotation stopping washer is sleeved on the special-shaped bolt, a rotation stopping structure is arranged between the rotation stopping washer and the special-shaped bolt, and the rotation stopping nut is connected with the special-shaped bolt through threads; the rotation stopping washer is provided with a first gear ring protruding in the axial direction, the tail portion of the rotation stopping nut is provided with a second gear ring which is opposite to and matched with the first gear ring, and teeth on the first gear ring and the second gear ring are ratchets, so that the first gear ring and the second gear ring cannot rotate in the reverse direction after being meshed. The technical scheme adopts a self-locking structure, so that the bolt is never loosened, and the situation that the traditional bolt is very easy to loosen or even completely break away to cause safety accidents when the impact vibration is frequent, the load amplitude is rapidly changed and the ambient temperature contrast is large is avoided.

Description

Self-locking bolt fastening device

Technical Field

The utility model relates to a fastener especially relates to from locking bolt fastening device.

Background

The common anti-loosening method for the bolt mainly comprises the friction anti-loosening and slotting nuts and cotters which mainly comprise spring washers, opposite-pushing nuts and self-locking nuts, the mechanical anti-loosening mainly comprising round nuts, stop washers, finned pads and the like, and the anti-loosening measures can be repeatedly disassembled and used. However, under the action of impact, vibration or variable load, and at high temperature or large temperature change, the friction force between the thread steels is reduced or eliminated, and the coupling may loosen. The key of the anti-loosening is the relative rotation of the anti-loosening spiral steel.

For places with higher requirements on looseness prevention, usually, the damage and looseness prevention is adopted, but the traditional damage and looseness prevention method usually adopts measures such as spot welding, riveting, adhesion and the like, and because the measures are limited by the size of connected objects, the characteristics of materials, environmental factors and the like, the spot welding is easy to crack, the riveting fatigue degree is poor, the aging effect of the adhesive is reduced, and thus the permanent looseness prevention in the true sense cannot be realized.

Under the action of impact, vibration or variable load, especially when the environmental temperature changes greatly, the friction locking and the mechanical locking adopted by the common bolt connection are likely to loosen and even completely separate, thereby causing safety accidents. Therefore, in the case of the screw connection, permanent locking measures have to be taken.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model and the technical task that provides are perfected and improved prior art scheme, provide from locking bolt fastening device to reach locking purpose. Therefore, the utility model adopts the following technical scheme.

The self-locking bolt fastening device comprises a special-shaped bolt, a rotation stopping washer and a rotation stopping nut; the rotation stopping washer is sleeved on the special-shaped bolt, a rotation stopping structure is arranged between the rotation stopping washer and the special-shaped bolt, and the rotation stopping nut is connected with the special-shaped bolt through threads; the rotation stopping washer is provided with a first gear ring protruding in the axial direction, the tail of the rotation stopping nut is provided with a second gear ring opposite to and matched with the first gear ring, and teeth on the first gear ring and the second gear ring are ratchets, so that the first gear ring and the second gear ring cannot rotate in the reverse direction after being meshed. The rotation stopping washer is sleeved on the special-shaped bolt, and a rotation stopping structure is arranged between the rotation stopping washer and the special-shaped bolt, so that the rotation stopping washer can only move axially, and the rotation stopping nut is rotated to push the rotation stopping washer, so that the effect of fastening the connecting piece is realized; the first gear ring and the second gear ring are mutually meshed and pressed to prevent the rotating nut from loosening.

As a preferable technical means: the special-shaped bolt is provided with a gasket connecting section with a hexagonal section, the through hole formed in the middle of the rotation stopping gasket is a hexagonal hole matched with the gasket connecting section, and the hexagonal gasket connecting section is matched with the hexagonal hole of the rotation stopping gasket to form a rotation stopping structure so as to limit the rotation of the rotation stopping gasket relative to the special-shaped bolt. The structure is simple and the work is reliable.

As a preferable technical means: the ratchet comprises a vertical stopping edge and an oblique guide edge. When the rotation stopping nut wants to rotate reversely, the stopping edge of the second gear ring abuts against the stopping edge of the first gear ring to limit the rotation of the second gear ring.

As a preferable technical means: the inner hole of the rotation stopping nut is divided into a unthreaded hole and a threaded hole, wherein the inner hole positioned at the tail part is the unthreaded hole, and the diameter of the inner hole is larger than that of the threaded hole positioned at the head part. The length of the threaded hole is convenient to process.

As a preferable technical means: the outer diameter of the second gear ring is larger than or equal to the diameter of an outer hexagonal circumscribed circle of the head of the rotation stopping nut. The diameter is large, the rotation stopping force is effectively improved, and the processing of the ratchet is convenient.

Has the advantages that:

the rotation stopping washer is sleeved on the special-shaped bolt, and a rotation stopping structure is arranged between the rotation stopping washer and the special-shaped bolt, so that the rotation stopping washer can only move axially, and the rotation stopping nut is rotated to push the rotation stopping washer, so that the effect of fastening the connecting piece is realized; the first gear ring and the second gear ring are meshed and pressed with each other, so that the loosening of the rotating nut is prevented, and the purpose of permanent loosening prevention is achieved. The problem of bolt disengagement is avoided.

The technical scheme has wide application range, adopts a self-locking structure, realizes that the bolt is never loosened, and avoids the situation that the traditional bolt is very easy to loosen or even completely break away to cause safety accidents when the impact vibration is frequent, the load amplitude is rapidly changed and the ambient temperature contrast is large.

Simple structure and easy production. The ratchet anti-loosening structure is adopted, the requirement on the machining precision of the ratchet is not high, the machining is convenient, and the product is easy to produce.

The assembling is convenient, only the screwing is needed, the welding is not needed, the working procedure is simple, and the installation is convenient.

Drawings

Fig. 1 is a schematic view of the assembly structure of the present invention.

Fig. 2(a) is a schematic front view of the rotation stopping nut of the present invention.

Fig. 2(b) is a left side view structure diagram of the rotation stopping nut of the present invention.

Fig. 2(c) is a right-view structural schematic diagram of the rotation stopping nut of the present invention.

Fig. 3 is an enlarged schematic view of the a-part structure of fig. 2 (a).

Fig. 4(a) is a front view structural diagram of the rotation stop washer of the present invention.

Fig. 4(b) is a schematic side view of the rotation stop washer of the present invention.

Fig. 5 is a schematic view of the special-shaped bolt structure of the present invention.

In the figure: 1. a special-shaped bolt; 101. a washer connection section; 2. a rotation stop washer; 201. a first ring gear; 202. a hexagonal hole; 3. a rotation stopping nut; 301. a second ring gear; 302. a light hole; 303. a threaded hole; 4. a ratchet; 401. stopping edges; 402. and (7) guiding the edges.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model comprises a special-shaped bolt 1, a rotation stopping washer 2 and a rotation stopping nut 3; the rotation stopping washer 2 is sleeved on the special-shaped bolt 1, a rotation stopping structure is arranged between the rotation stopping washer and the special-shaped bolt 1, and the rotation stopping nut 3 is connected with the special-shaped bolt 1 through threads; the rotation stopping washer 2 is provided with a first gear ring 201 protruding in the axial direction, the tail of the rotation stopping nut 3 is provided with a second gear ring 301 opposite to and matched with the first gear ring 201, teeth on the first gear ring 201 and the second gear ring 301 are ratchets 4, and the first gear ring 201 and the second gear ring 301 cannot rotate reversely after being meshed. The rotation stopping washer 2 is sleeved on the special-shaped bolt 1, and a rotation stopping structure is arranged between the rotation stopping washer 2 and the special-shaped bolt 1, so that the rotation stopping washer 2 can only move axially, and the rotation stopping nut 3 is rotated to push the rotation stopping washer 2, so that the effect of fastening a connecting piece is realized; the first ring gear 201 and the second ring gear 301 are engaged and pressed with each other to prevent the swivel nut 3 from loosening.

For reliable rotation stopping, as shown in fig. 3, the ratchet 4 includes a vertical stopping edge 401 and an oblique guiding edge 402. When the rotation stopping nut 3 wants to rotate reversely, the stopping edge 401 of the second gear ring 301 is abutted against the stopping edge 401 of the first gear ring 201 to limit the rotation of the second gear ring, and when the rotation stopping nut 3 rotates forwards, the inclined edge is matched with the inclined edge, and the inclined edge has a guiding function, so that the second gear ring can rotate forwards until the axial clearance is insufficient and the second gear ring cannot rotate enough. In the present technical solution, the first ring gear 201 and the second ring gear 301 are both provided with 24 ratchet teeth 4.

As shown in fig. 5, in order to realize reliable connection between the special-shaped bolt 1 and the rotation stop washer 2, the special-shaped bolt 1 is provided with a washer connecting section 101 with a hexagonal cross section; as shown in fig. 4(a) and 4(b), the through hole formed in the middle of the rotation stop washer 2 is a hexagonal hole 202 matched with the washer connecting section 101, and the hexagonal washer connecting section 101 and the hexagonal hole 202 of the rotation stop washer 2 are matched to form a rotation stop structure to limit the rotation of the rotation stop washer 2 relative to the special-shaped bolt 1. The structure is simple and the work is reliable. In order to facilitate assembly and processing, the special-shaped bolt 1 is composed of a hexagonal head, a cylinder, a hexagonal column and a screw, wherein the hexagonal column is the gasket connecting section 101.

As shown in fig. 2(a), 2(b), and 2(c), for the convenience of processing: the inner hole of the rotation stopping nut 3 is divided into a smooth hole 302 and a threaded hole 303, wherein the inner hole at the tail part is the smooth hole 302, and the diameter of the inner hole is larger than that of the threaded hole 303 at the head part. The length of the threaded hole 303 is shortened, and the processing is convenient. In order to reduce the processing difficulty of the gear ring, the outer diameter of the second gear ring 301 is larger than or equal to the diameter of the outer hexagonal circumscribed circle of the head of the rotation stopping nut 3. The diameter is large, the torque is effectively improved, and the processing of the ratchet 4 is convenient.

As shown in figure 1, when the self-locking bolt is connected, two parts which are not too thick and can be drilled into holes are connected together by using parts such as a special-shaped bolt 1, a rotation stopping washer 2, a rotation stopping nut 3 and the like. The connected part does not need internal threads, but only drills a through hole which is determined according to the size of the connected part, the size of the bolt rod of the special-shaped bolt 1 and the machining precision requirement. The dimensions of the hexagonal head, the cylinder, the hexagonal cylinder, the screw, the anti-rotation washer 2 and the anti-rotation nut 3 of the profiled bolt 1 can be customized according to the thickness of the coupling parts, the requirements of impact and vibration resistance and the relevant regulatory specifications.

During assembly, the special-shaped bolt 1 penetrates through the through holes of the two connected machine parts, the rotation stopping washer 2 is sleeved at one end with the thread, the smooth surface is close to the connected part, the rotation stopping nut 3 is screwed, and when the first gear ring 201 of the rotation stopping washer 2 is meshed with the second gear ring 301 of the rotation stopping nut 3, the rotation stopping nut 3 is screwed.

Through the butt joint of hexagonal hole 202 of spline packing ring 2 and heterotypic bolt 1's outer hexagonal column body, realize spline packing ring 2 and can only reciprocate, provide rotatory space to spline nut 3, prevent simultaneously the rotation of spline packing ring 2: through rotatory spline nut 3, promote spline packing ring 2, realize the effect of fastening coupling spare: the ratchet 4 of the rotation stopping washer 2 and the ratchet 4 of the rotation stopping nut 3 are mutually meshed and pressed to prevent the rotation stopping nut 3 from loosening.

The self-locking bolt fastening device shown in the above drawings is a specific embodiment of the present invention, and embodies the substantial features and the progress of the present invention, and can be modified in the aspects of shape, structure and the like according to the practical use requirements, all within the protection scope of the present scheme.

Claims

1. From locking bolt fastening device, its characterized in that: comprises a special-shaped bolt (1), a rotation stopping washer (2) and a rotation stopping nut (3); the rotation stopping washer (2) is sleeved on the special-shaped bolt (1), a rotation stopping structure is arranged between the rotation stopping washer and the special-shaped bolt, and the rotation stopping nut (3) is connected with the special-shaped bolt (1) through threads; the rotation stopping washer (2) is provided with a first gear ring (201) protruding in the axial direction, the tail of the rotation stopping nut (3) is provided with a second gear ring (301) opposite to and matched with the first gear ring (201), teeth on the first gear ring (201) and the second gear ring (301) are ratchets (4), and the first gear ring (201) and the second gear ring (301) cannot rotate in the reverse direction after being meshed.

2. The self-locking bolt-fastening device according to claim 1, characterized in that: heterotypic bolt (1) be equipped with the cross-section and be hexagonal packing ring linkage segment (101), the through-hole of seting up in the middle of spline packing ring (2) is hexagonal hole (202) that match with packing ring linkage segment (101), hexagonal packing ring linkage segment (101) and the hexagonal hole (202) cooperation formation of spline packing ring (2) spline the structure, the restriction spline the rotation of packing ring (2) relative heterotypic bolt (1).

3. The self-locking bolt-fastening device according to claim 2, characterized in that: the ratchet (4) comprises a vertical stopping edge (401) and an oblique guide edge (402).

4. The self-locking bolt-fastening device according to claim 3, characterized in that: the inner hole of the rotation stopping nut (3) is divided into a unthreaded hole (302) and a threaded hole (303), wherein the inner hole at the tail part is the unthreaded hole (302), and the diameter of the inner hole is larger than that of the threaded hole (303) at the head part.

5. The self-locking bolt-fastening device according to claim 4, characterized in that: the outer diameter of the second gear ring (301) is larger than or equal to the diameter of an outer hexagonal circumscribed circle of the head of the rotation stopping nut (3).