CN111043141A

CN111043141A - Interlocking retaining nut

Info

Publication number: CN111043141A
Application number: CN201910408979.9A
Authority: CN
Inventors: 李先登
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-04-21

Abstract

The invention discloses an interlocking retaining nut, belonging to the technical field of machinery: the nut is formed by combining a three-ladder-table nut A and an inward concave cone locking nut B, the outer part of the nut A is respectively a hexagonal loose thick cylindrical surface, a loose screw middle cylindrical surface and a lock withdrawing thin groove cylindrical surface, and the three cylinders are matched with one another and are loose and tight by a coaxial core line, an internal spiral bus and one common screw; the vertical axis direction between the middle cylindrical surface and the light cylindrical surface is provided with an even number of uniformly distributed small holes with the diameter of D, the outer end of the thin pipe sleeve is cut with a large-angle spiral leakage groove which is opposite to the spiral direction of the inner nut and has the width of L along the diameter direction of each small hole, and D is more than or equal to L; the nut A is screwed on the bolt, and a small inner vertebra locking hoop of the nut B is in interference fit with an outer light thin groove column of the nut A; screwing the nut B on the nut A, wherein the small inner vertebra locking hoop of the nut B compresses the thin groove column end of the nut A to enable the thin groove column end to become a micro-cone frustum tube, the thin cone end is compressed on the bolt to enable the two screw surfaces to be in a compression dead point type interlocking mode, the groove line is exposed, and the two sides are compressed to lock the locking hoop of the nut B; the nut B can be manually unlocked.

Description

Interlocking retaining nut

Technical Field

The invention relates to an interlocking retaining nut, and belongs to the technical field of machinery.

Technical Field

The loosening of nuts and screws caused by mechanical vibration is one of the common harmful phenomena in the mechanical technical field, which can cause damages and even accidents of various devices, in order to ensure the effective and safe operation of the device functions, people search, summarize and formulate the maintenance management method and system rules of the device, and carry out regular maintenance and periodic maintenance on the device according to the plan regulation, especially in some high-end mechanical device technical fields such as high-speed rails and the like, particularly, the high-speed rail and the like have high backstop technical requirements on fastening connection at some key parts, and are eagerly expected to obtain more technical supports of backstop zero-loosening connection, so as to greatly increase the maintenance cycle time of the device, reduce the maintenance workload, simplify the maintenance method, and provide favorable conditions for greatly prolonging the maintenance cycle of the maintenance device after the progress of the industrial technology, the material, the lubrication and the like have great achievements, however, subversive technical innovation is needed for the problem of connection looseness of key parts, so that the problem of free looseness caused by vibration is reduced to zero, and various unforeseen events caused by automatic looseness of machinery are avoided.

Disclosure of Invention

In order to solve the problems, the invention provides an interlocking retaining nut which is characterized in that: the nut is formed by combining a three-ladder-table nut A and an inward concave cone locking nut B, the outer part of the nut A is respectively a hexagonal loose thick cylindrical surface, a loose screw middle cylindrical surface and a lock withdrawing thin groove cylindrical surface, and the three cylinders are matched with one another and are loose and tight by a coaxial core line, an internal spiral bus and one common screw; the vertical axis direction between the middle cylindrical surface and the light cylindrical surface is provided with an even number of uniformly distributed small holes with the diameter of D, the outer end of the thin pipe sleeve is cut with a large-angle spiral leakage groove which is opposite to the spiral direction of the inner nut and has the width of L along the diameter direction of each small hole, and D is more than or equal to L; the nut A is screwed on the bolt, and a small inner vertebra locking hoop of the nut B is in interference fit with an outer light thin groove column of the nut A; screwing the nut B on the nut A, wherein the small inner vertebra locking hoop of the nut B compresses the thin groove column end of the nut A to enable the thin groove column end to become a micro-cone frustum tube, the thin cone end is compressed on the bolt to enable the two screw surfaces to be in a compression dead point type interlocking mode, the groove line is exposed, and the two sides are compressed to lock the locking hoop of the nut B; the nut B can be manually unlocked.

All the nuts and screws are movably matched parts, a slight gap exists between the surfaces of the inner and outer threads, the shapes of the nuts A and B are different from the shapes of common nuts, the thin sleeve type small-diameter circular column body with the external light and the inner threads with the grooves of the three-step table type nut A is artificially cut into even number, and a certain number of exposed grooves which are oblique to the inner threads, uniformly distributed around the circular column body, have the width of L and equal length and are parallel to the line of the space groove body are arranged between the grooves and the bus bars, namely, the continuous tightness integrity of the original cylinder is artificially damaged, and small holes with the diameter D are uniformly distributed on the same vertical plane in an even number in the radial direction of the vertical axis between the part outside the middle-diameter ring and the part connected with the small-diameter ring, that is, the root end of each groove is communicated with the small hole, D is not less than L, and most of the D is more than L, the condition is created for the grooved small-diameter circular cylinder end part to be pressed and easily become a circular micro-vertebral platform body in a micro-shape; if the diameter of a large cone opening of an inner cone ring of the nut B is equal to the processing outer diameter of a circular ring body of the grooved outer light inner spiral thin sleeve and faces the grooved outer light inner spiral thin sleeve, the diameter of a small cone opening is equal to the end of the small-diameter circular ring body of the grooved outer light inner spiral thin sleeve, namely the end of the small cone opening is not smaller, namely the end inner spiral and the inner and outer screw surfaces of the screw are tightly connected with each other and have zero clearance with the minimum diameter of the corresponding grooved outer light inner spiral thin sleeve type small-diameter circular ring body, when the inner cone ring runs towards the grooved outer light inner spiral thin sleeve type small-diameter circular ring body along the axial direction, the inner cone ring of the nut B is converged and presses the end of the grooved outer light inner spiral thin sleeve type small-diameter circular ring body, so that the inner spiral of the end is centripetally converged and the end inner spiral is tightly contacted with the screw, and the grooved outer light inner spiral; if the inner vertebral rings continue to run in the same direction, the inner vertebral rings are enabled to be increasingly close to the root of the thin sleeve type small-diameter ring body with the external light inner spiral threads with the grooves, the extrusion force between the end nut and the screw is increased until the inner vertebral rings are completely compressed and can not be pressed, even the overpressure reaches the position where the two threads cannot slide when being locked by a mechanical dead point, and the nut A is difficult to or can not be loosened; if the inner vertebral ring moves outwards until the inner vertebral ring is completely separated, the slightly-changed circular cone body is slightly changed to be restored to the original ring cylinder body under the action of the elastic restoring force of the slightly-changed circular cone body, and the three-step table type nut A can release the retaining function.

The inner cone ring and the concave nut are fused into an integral component, so that the inner cone type nut B is changed into the inner cone type nut B, the tightness of the nut B and the nut A is adjusted, the tightness of an inner thread of an outer end head of the nut A and a bolt screw line is adjusted, the mutual friction force is increased and decreased, the stopping quality of the nut A is controlled, the nut B and the nut A are combined and matched for use, and the tightness between the two nuts is adjusted, so that the grooved external light inner thread thin-sleeve type small-diameter ring body of the nut A can be changed into a micro-ring cone body from a ring cylinder body or can be changed into the flexible deformation and degree of the original ring cylinder body from the micro-ring cone body, and the stopping function of the nut A is conveniently established and released.

Triple interlock process between screw and nut A, B: the nut A is screwed on the screw rod, then the nut B is screwed on the middle diameter ring body of the outer spiral line of the nut A in the same direction, along with the tightening rotation of the nut B, the screw of the nut A pulls the nut B to firstly gather and press the end of the small diameter ring body of the thin sleeve type inner spiral line with grooved outer light of the nut B end part, so that the end is slowly changed into a micro-ring cone body from a ring cylinder body, the shape change enables the end of the thin sleeve type small diameter ring body of the thin sleeve type inner spiral line with grooved outer light of the nut A to be tightly pressed on the screw surface of the screw rod, the mutual acting force of the inner spiral line and the outer spiral line is continuously increased, when the required tightness is reached, the top static friction between the inner spiral line of the end of the nut A and the screw thread of the screw rod, namely the inner spiral line and the outer spiral line are gathered and tightly pressed, the screw rod screw corresponding to each groove line is not pressed, and the pressing and non-, the loosening difficulty of the nut A is greatly improved, and even the nut A reaches a mechanical dead point and is completely locked, so that the purpose of stopping the nut A and the bolt is achieved;

similarly, the groove strips outside the micro-toroidal frustum body are exposed and act on the inner cone ring of the nut B together with the reaction pressure of the external smooth surface to form a micro-tooth-shaped interaction surface, so that the loosening difficulty of the nut B is greatly increased, the vibration free loosening capacity of the nut B can be greatly reduced, and the situation that the nut A cannot lose the stopping capacity due to the vibration loosening of the nut B is further ensured; the shrinkage pressure of the nut B locks the nut A or the bolt is loosened, the locking and retaining purpose of combining the nut A and the bolt is realized, the special shape of the groove line of the small-diameter ring body of the nut A can form larger reverse spiral static friction force with the nut B, so that the nut A has a retaining function on the nut B, the locking and retaining function of the nut A is further strengthened and ensured, the nut A and the bolt are bidirectionally interlocked, the nut A and the nut B are also bidirectionally interlocked, the vibration and loosening problems of nut connection are jointly ensured, the interlocking mode of the nut A and the nut B has fewer parts, the operation is simple, the convenience is realized, the conception is scientific and ingenious, the theoretical locking reliability is very high, and the locking and retaining device is very suitable for retaining connection of a fastening connecting piece with super-large force.

Drawings

FIG. 1 is a schematic view of a three-step interlocking retaining nut in its form and assembly relationship;

fig. 1 includes nut a1, bolt 2, nut B3, and connecting seat 4.

The first embodiment is as follows: the stopping and releasing processes of the three-step interlocking stopping nut are shown in figure 1.

Fig. 1 is a schematic diagram of the form and the assembly relationship of a three-step interlocking retaining nut, two assembly connecting seats (4) are accurately positioned, a bolt (2) is sleeved, a nut A (1) is tightened again, after the tightness of the nut A (1) is confirmed to meet the requirement, a nut B (3) is tightened on the nut A (1) in the same direction, after the tightness of the nut B (3) and the nut A (1) is confirmed to meet the requirement, the nut A (1) and the bolt (2) among the nut A (1), the bolt (2) and the nut B (3) are bidirectionally interlocked, the interlocking relationship of the three parts of the nut A (1) and the nut B (3) which are bidirectionally interlocked is established, and at the moment, the nut A (1), the bolt (2) and the nut (3) have the retaining function;

the nut B (3) enables the grooved external light internal spiral thin-line thin-sleeve type small-diameter torus of the nut A (1) to be tightly connected from the single side surface of the column body in a movable fit manner to be changed into double-sided large-pressure moderate contact of the micro-toroidal frustum, so that the nut A (1) and the bolt (2) are not loosened; the grooved external light internal thread thin sleeve type small-diameter ring body of the nut A (1) is in a tooth-shaped special static pressure form with repeated intervals of 'empty, solid, empty and solid' between a grooved line external light curved surface entity and an inner cone ring surface of the nut B (3), and under the action of large gathering pressure of the nut B (3), the nut B (3) is enabled to establish a self-stopped mode by the aid of overlarge static friction force, so that a three-interlocking stable mode of the nut A (1), the bolt (2) and the nut (3) is guaranteed; when people need to relieve the three-interlocking mode, the nut (3) can be reversely loosened and taken down, under the self elastic action of the spiral thin-walled sleeve type small-diameter ring body with the groove outer light of the nut A (1), the nut A (1) is reversely screwed after the micro-ring cone platform body is restored to the ring column platform body, and then the whole loosening decomposition states of the nut A (1), the bolt (2) and the connecting seat (4) can be realized.

Claims

1. The utility model provides an interlocking stopping nut which characterized in that: the nut is formed by combining a three-ladder-table nut A and an inward concave cone locking nut B, the outer part of the nut A is respectively a hexagonal loose thick cylindrical surface, a loose screw middle cylindrical surface and a lock withdrawing thin groove cylindrical surface, and the three cylinders are matched with one another and are loose and tight by a coaxial core line, an internal spiral bus and one common screw; the vertical axis direction between the middle cylindrical surface and the light cylindrical surface is provided with an even number of uniformly distributed small holes with the diameter of D, the outer end of the thin pipe sleeve is cut with a large-angle spiral leakage groove which is opposite to the spiral direction of the inner nut and has the width of L along the diameter direction of each small hole, and D is more than or equal to L; the nut A is screwed on the bolt, and a small inner vertebra locking hoop of the nut B is in interference fit with an outer light thin groove column of the nut A; screwing the nut B on the nut A, wherein the small inner vertebra locking hoop of the nut B compresses the thin groove column end of the nut A to enable the thin groove column end to become a micro-cone frustum tube, the thin cone end is compressed on the bolt to enable the two screw surfaces to be in a compression dead point type interlocking mode, the groove line is exposed, and the two sides are compressed to lock the locking hoop of the nut B; the nut B can be manually unlocked.

2. An interlocking backstop nut as claimed in claim 1 wherein: the shape of the nut A and the shape of the nut B are greatly different from the shape of a common nut, even number of small-diameter circular ring cylinders of a three-step table type nut A are artificially cut, certain reverse internal threads are arranged between the grooves and buses, the small-diameter circular ring cylinders are obliquely distributed around the circular ring cylinders, have L widths and are uniform in length, and are exposed with parallel space groove body lines, namely, the continuous tightness integrity of the original circular ring cylinders is artificially damaged, and small holes with D diameters are uniformly distributed on the same vertical plane in an even number manner in the radial direction of a vertical axis between the middle-diameter circular ring bodies and the connected parts of the small-diameter circular ring bodies, namely, the root end of each groove is connected and communicated with the small hole, D is not less than L, and D is more than L under most conditions, so that the end parts of the small-diameter circular ring cylinders are pressed to be easily changed into circular ring micro-cone tables; if the diameter of a large cone opening of an inner cone ring of the nut B is equal to the processing outer diameter of a circular ring body of the grooved outer light inner spiral thin sleeve and faces the grooved outer light inner spiral thin sleeve, the diameter of a small cone opening is equal to the end of the small-diameter circular ring body of the grooved outer light inner spiral thin sleeve, namely the end of the small cone opening is not smaller, namely the end inner spiral and the inner and outer screw surfaces of the screw are tightly connected with each other and have zero clearance with the minimum diameter of the corresponding grooved outer light inner spiral thin sleeve type small-diameter circular ring body, when the inner cone ring runs towards the grooved outer light inner spiral thin sleeve type small-diameter circular ring body along the axial direction, the inner cone ring of the nut B is converged and presses the end of the grooved outer light inner spiral thin sleeve type small-diameter circular ring body, so that the inner spiral of the end is centripetally converged and the end inner spiral is tightly contacted with the screw, and the grooved outer light inner spiral; if the inner vertebral rings continue to run in the same direction, the inner vertebral rings are enabled to be increasingly close to the root of the thin sleeve type small-diameter ring body with the external light inner spiral threads with the grooves, the extrusion force between the end nut and the screw is increased until the inner vertebral rings are completely compressed and can not be pressed, even the overpressure reaches the position where the two threads cannot slide when being locked by a mechanical dead point, and the nut A is difficult to or can not be loosened; if the inner vertebral ring moves outwards until the inner vertebral ring is completely separated, the slightly-changed circular cone body is slightly changed to be restored to the original ring cylinder body under the action of the elastic restoring force of the slightly-changed circular cone body, and the three-step table type nut A can remove the backstopping function;

3. An interlocking backstop nut as claimed in claim 1 wherein: triple interlock process between screw and nut A, B: the nut A is screwed on the screw rod, then the nut B is screwed on the middle diameter ring body of the outer spiral line of the nut A in the same direction, along with the tightening rotation of the nut B, the screw of the nut A pulls the nut B to firstly gather and press the end of the small diameter ring body of the thin sleeve type inner spiral line with grooved outer light of the nut B end part, so that the end is slowly changed into a micro-ring cone body from a ring cylinder body, the shape change enables the end of the thin sleeve type small diameter ring body of the thin sleeve type inner spiral line with grooved outer light of the nut A to be tightly pressed on the screw surface of the screw rod, the mutual acting force of the inner spiral line and the outer spiral line is continuously increased, when the required tightness is reached, the top static friction between the inner spiral line of the end of the nut A and the screw thread of the screw rod, namely the inner spiral line and the outer spiral line are gathered and tightly pressed, the screw rod screw corresponding to each groove line is not pressed, and the pressing and non-, the loosening difficulty of the nut A is greatly improved, and even the nut A reaches a mechanical dead point and is completely locked, so that the purpose of stopping the nut A and the bolt is achieved;

4. An interlocking backstop nut as claimed in claim 1 wherein the actual use thereof establishes the backstop and disarm process: after the two assembly connecting seats (4) are accurately positioned, the bolts (2) are sleeved in the assembly connecting seats, the nuts A (1) are tightened again, after the tightness of the nuts A (1) is confirmed to be suitable for requirements, the nuts B (3) are tightened on the nuts A (1) in the same direction, after the tightness of the nuts B (3) and the nuts A (1) is confirmed to be suitable for requirements, the nuts A (1) and the bolts (2) among the nuts A (1), the bolts (2) and the nuts B (3) are bidirectionally interlocked, the interlocking relation of the three parts of the nuts A (1) and the nuts B (3) which are bidirectionally interlocked is established, and at the moment, the nuts A (1), the bolts (2) and the nuts (3) have the backstop function;