CN219509991U

CN219509991U - Novel anti-loosening fastener

Info

Publication number: CN219509991U
Application number: CN202121867565.1U
Authority: CN
Inventors: 睢栋
Original assignee: Datong Jinjia Mining Machinery R&d Co ltd
Current assignee: Datong Jinjia Mining Machinery R&d Co ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2023-08-11
Anticipated expiration: 2031-08-11

Abstract

The utility model discloses a novel anti-loosening fastener which is used for being in threaded connection with a screw rod and comprises an upper taper fastening part I and a lower taper fastening part II; an inner cone is arranged on the inner wall of the first fastening part, a clamping part I is arranged outside one end of the small diameter of the inner cone, and a threaded hole I is formed in the clamping part I; the second fastening part is provided with an outer cone and a second clamping part connected with the big head of the cone, and the whole fastening part is provided with a second through hole; the inner cone of the first fastening part and the outer cone of the second fastening part are matched according to the same degree and then are combined together; the threaded hole I and the threaded hole II are matched on the same screw; the small end face of the outer cone of the second fastening part is provided with a plurality of slits axially along the cone; the slit extends to the clamping part II according to the axis direction of the second cone of the fastening part. The utility model has strong practicability and functionality, and can be widely applied to the technical field of mechanical equipment.

Description

Novel anti-loosening fastener

Technical Field

The utility model relates to the technical field of mechanical equipment, in particular to a novel anti-loosening fastener.

Background

The combination of equipment parts and assemblies cannot be permanently fastened in the environments of large stress, high re-vibration frequency and large part transmission torque by the traditional nuts and the existing anti-loosening fasteners on the market, a large amount of time and manpower are often required to be input for inspection, repeated tightening can be carried out repeatedly, the nuts are welded to be killed, the nuts are cut off when the nuts are loosened, the nuts are re-tightened and then welded to be killed, the parts of the equipment parts which are required to be fastened are more, and the workload is also more (such as a large crusher, a high-speed rail, a mechanical transmission shaft, a heavy truck tire steel ring, various mine coarse breaking equipment, semi-autogenous grinding, a mechanical re-hammer, a rotary drilling rig, a shield machine, a large engine cylinder body and the like), and the equipment parts which are required to be fastened permanently with high strength. Various locknuts and other fasteners circulated in the market at present cannot achieve the functions of structural stability and non-loosening permanence in the environment, so that the practicability of the equipment in the use process is restricted.

Disclosure of Invention

Aiming at the problems, the utility model provides a locking fastener which is firm in connection and simple to operate. The technical scheme provided by the utility model is as follows:

the novel anti-loosening fastener is used for being in threaded connection with a screw rod and comprises an upper taper fastening part I and a lower taper fastening part II; an inner cone is arranged on the inner wall of the first fastening part, a clamping part I is arranged outside one end of the small diameter of the inner cone, and a threaded hole I is formed in the clamping part I; the second fastening part is provided with an outer cone and a second clamping part connected with the big head of the cone, and the whole fastening part is provided with a second through hole; the inner cone of the first fastening part and the outer cone of the second fastening part are matched according to the same degree and then are combined together; the threaded hole I and the threaded hole II are matched on the same screw; the small end face of the outer cone of the second fastening part is provided with a plurality of slits axially along the cone; the cutting seam extends to the clamping part II according to the axial direction of the second cone of the fastening part.

Further, the first fastening part and the second fastening part are matched on the same screw rod in opposite directions according to respective cones; the clamping part I and the clamping part II are arranged at two ends of the fastening part I and the fastening part II which are matched on the same screw rod, and then a complete fastening piece is formed.

Further, the clamping part I and the clamping part II are used for clamping with the spanner; screw holes for the screw rod to pass through are arranged in the clamping part I and the clamping part II.

Furthermore, the cutting slits are arranged in a plurality, and are circumferentially distributed on the small end face of the second cone of the fastening part at equal intervals.

Further, the clamping part I and the clamping part II are both in prismatic structures; the fastening part I is of a cylindrical structure except for the clamping part I, and the clamping part I is arranged at one end of the small end of the inner cone; the second fastening part is provided with a conical body except the second clamping part, and the second clamping part is connected with the large head of the cone; the cutting seam extends from the small end of the second cone of the fastening part to the second clamping part.

Further, the maximum outer diameter of the clamping part I is equal to the outer wall diameter of the inner cone of the fastening part I and the maximum outer diameter of the clamping part II.

Further, the total length of the second fastening part is the total length of the second threaded through hole, the length of the first threaded through hole of the fastening part is the length of the first clamping part, and the first clamping part is arranged in the second clamping part.

Compared with the prior art, the utility model has the advantages that:

through providing a structure with a first fastening part and a second fastening part, arranging a second internal threaded hole on the second fastening part, and arranging a first internal threaded hole on the first fastening part, after two cones are matched on a screw rod, the clamping part I and the clamping part II are respectively outwards acted on axial wire surfaces of threads in the first fastening part and the second fastening part and external threads of the screw rod under the action of a spanner by pressure generated by opposite displacement of the two cones, so that an anti-loosening and anti-blocking friction surface is increased, and anti-loosening and anti-blocking axial friction force is improved; through set up the joint-cutting on the fastening portion two, strengthened screw rod and screw thread radial tolerance and reduced to 0 function, under the pressure of cone, outer cone diameter diminishes gradually, releases the shrink allowance through the joint-cutting to reach the tight fit of screw rod silk mouth, increase the radial friction surface of silk, improve locking anti-friction power, and then reach the tight combination of screw thread silk face horizontal and vertical and never become flexible, stable firm purpose, reinforcing practicality. Conventional nuts and other fasteners do not provide this function.

Drawings

FIG. 1 is an external construction diagram of the present utility model;

fig. 2 is a cross-sectional view of an embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to fig. 1 and 2.

A novel anti-loosening fastener is used for being in threaded connection with a screw rod 6. Comprising the following steps: an upper cone fastening part 1 and a lower cone fastening part 3. An inner wall cone body 2 is arranged in the upper taper fastening part 1, and a threaded hole 10 which is matched with the screw rod 6 is arranged in the clamping part 8; an axial whole-body threaded hole II 5 is arranged in the lower taper fastening part II 3, and the internal threaded hole II 5 is matched with the screw rod 6; the upper cone 2 and the lower cone 4 of the inner wall are matched with working surfaces with the same taper degree and smooth outer surfaces, and are jointed without tolerance; the second fastening portion 3 is provided with a plurality of slits 7, the width of which is proportional to the outer diameter of the cone, and the slits 7 extend to the second clamping portion 9 in the axial direction of the second fastening portion 3.

In the process of fastening by using the device, the device comprises the following working processes:

the first fastening part 1 and the second fastening part 3 are respectively screwed onto a screw rod 6 to be fastened (when a reverse screw rod is encountered, the first fastening part 1 and the second fastening part 3 are required to be set as reverse screw openings), the second fastening part 3 and a part to be fastened are firstly screwed down along the screw rod 6, the second clamping part 9 faces the part to be fastened, then the first fastening part 1 is screwed down along the same screw rod to be screwed down, the first clamping part 8 is outwards, so that under the action force of an inner taper body and an outer taper body, a plurality of cutting slits on the lower cone 4 are gradually contracted, the outer diameter of the cone and the inner diameter of the threaded hole 5 are synchronously contracted, the joint surfaces of the smooth surfaces of the two cones are synchronously increased, the anti-loosening and anti-blocking friction force is also increased until all 0 tolerance of all working screw opening transverse and longitudinal screw surfaces acting on the whole screw rod 6 are jointed with the screw rod 6, and thus the fastener with stable fastening performance is formed, and the purpose of never loosening is achieved.

The clamping part I8 and the clamping part II 9 are used for clamping with the spanner; the clamping part I8 and the clamping part II 9 comprise a cone 4, and are respectively provided with a through hole for the screw rod 6 to pass through; the number of the slits 7 is several, and the slits are distributed on the cone 4 of the second fastening part 3 in equal intervals in the circumferential direction.

The clamping part I8 and the clamping part II 9 are mutually matched with a spanner of the device to be screwed, and the clamping part I8 or the clamping part II 9 is clamped by the spanner in the screwing process.

The clamping part I8 and the clamping part II 9 are both in prismatic structures; the first fastening part 1 is in a cylindrical structure below the clamping 8, and the second fastening part 3 is in a conical body with the outer diameter gradually reduced above the clamping 9; the cutting slit 7 extends from the small end of the second cone of the fastening part 3 to the root of the large end of the cone in the direction of approaching the clamping part 9. The maximum outer diameter of the clamping portions 8, 9 is equal to the outer diameter of the cone 2.

The traditional nuts (or other fasteners) are locked singly or in multiple nuts, the nuts are tightly jointed on the transverse surface of the screw wire port and the radial direction without shrinkage, the stressed friction surface is small, and the generated counter resistance is also small; the device is realized by the mutual matching of the fastening part I and the fastening part II 3, all the parts with taper are in interference fit with the stressed outer thread surface of the screw rod under the action of opposite stress, the generated friction resistance surface is more than ten times of the friction surface resistance of the traditional locking nuts (or other fasteners) acting on the screw rod, namely more than ten times of the anti-loosening resistance of the traditional fasteners of the same type, and a spring cushion is not needed to be additionally arranged, so that the device has strong functions and practicability.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims

1. The novel anti-loosening fastener is characterized by being used for being in threaded connection with a screw rod and comprising an upper taper fastening part I and a lower taper fastening part II; an inner cone is arranged on the inner wall of the first fastening part, a clamping part I is arranged outside one end of the small diameter of the inner cone, and a threaded hole I is formed in the clamping part I; the second fastening part is provided with an outer cone and a second clamping part connected with the big head of the cone, and the whole fastening part is provided with a second through hole; the inner cone of the first fastening part and the outer cone of the second fastening part are matched according to the same degree and then are combined together; the threaded hole I and the threaded hole II are matched on the same screw; the small end face of the outer cone of the second fastening part is provided with a plurality of slits axially along the cone; the cutting seam extends to the clamping part II according to the axial direction of the second cone of the fastening part.

2. The novel anti-loosening fastener as claimed in claim 1, wherein the first fastening portion and the second fastening portion are adapted to be fitted on the same screw in opposite directions with respective cones; the clamping part I and the clamping part II are arranged at two ends of the fastening part I and the fastening part II which are matched on the same screw rod, and then a complete fastening piece is formed.

3. The novel anti-loosening fastener as claimed in claim 1, wherein the clamping portion I and the clamping portion II are used for clamping with the wrench; screw holes for the screw rod to pass through are arranged in the clamping part I and the clamping part II.

4. The novel anti-loosening fastener as claimed in claim 1, wherein the number of the slits is several, and the slits are circumferentially and equally spaced on the two cones of the fastening portion.

5. The novel anti-loosening fastener as claimed in claim 1, wherein the first clamping part and the second clamping part are both in prismatic structures; the fastening part I is of a cylindrical structure except for the clamping part I, and the clamping part I is arranged at one end of the small end of the inner cone; the second fastening part is provided with a conical body except the second clamping part, and the second clamping part is connected with the large head of the cone; the cutting seam extends from the small end of the second cone of the fastening part to the second clamping part.

6. The novel anti-loosening fastener as claimed in claim 1, wherein the maximum outer diameter of the first clamping portion is equal to the outer wall diameter of the first inner cone of the fastening portion and the maximum outer diameter of the second clamping portion.

7. The novel anti-loosening fastener as claimed in claim 1, wherein the total length of the second fastening portion is the total length of the second threaded through hole, the first threaded through hole of the fastening portion is the length of the first clamping portion, and the first clamping portion is arranged therein.