CN219013139U

CN219013139U - Self-locking nut

Info

Publication number: CN219013139U
Application number: CN202223366516.7U
Authority: CN
Inventors: 黄敏; 李晶芳
Original assignee: Wenzhou Shengwei Vehicle Parts Co ltd
Current assignee: Wenzhou Shengwei Vehicle Parts Co ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-05-12
Anticipated expiration: 2032-12-15

Abstract

The utility model relates to the technical field of fasteners and discloses a self-locking nut which comprises a nut body, wherein a base is fixedly sleeved on one side of the outer wall of the nut body. According to the utility model, at least two internal threads with the jacking mechanism are additionally arranged, after the bolts or the screws are sleeved, the protruding blocks of the jacking mechanism are stressed and contracted, the connecting springs are driven to contract, and the connecting springs generate a reaction force, so that the protruding blocks are pushed out to complete the jacking and fixing effects, meanwhile, the movable threaded blocks with the reset springs are embedded, the thickness of the movable threaded blocks is larger than that of the original internal threads and at least two threaded holes, so that the extrusion stress between the bolts or the screws and the movable threaded blocks is stronger after the bolts or the screws are sleeved, the friction force between the bolts or the screws and the movable threaded blocks is greatly improved, the embedded rubber ring added by the traditional nuts is replaced, the nut can be repeatedly used without repeated replacement, the stability of the nut is enhanced, the anti-loosening capability is improved, and the nut is convenient to use and low in cost.

Description

Self-locking nut

Technical Field

The utility model relates to the technical field of fasteners, in particular to a self-locking nut.

Background

The prior patent (publication number: CN 204828233U) discloses a self-locking nut, which comprises a nut body, wherein the center of the nut body is provided with a threaded hole in the vertical direction, and is characterized in that: the upper end face of the nut body is connected with a thin-wall sleeve, a nylon gasket is arranged in the thin-wall sleeve, the nylon gasket is pressed on the upper end face of the nut body by inward flanging of the upper port of the thin-wall sleeve, a plurality of protruding cylinders are arranged on the bottom end face of the nylon gasket, and concave holes corresponding to the protruding cylinders are arranged on the upper end face of the nut body; an overhanging boss is arranged on the right side of the nut body, a transverse through hole in the front-back direction is arranged in the middle of the overhanging boss, and the nut body and the overhanging boss are integrally upsetting and forming. The nut screwing device can avoid the situation that the nut is screwed and assembled when the Shi Nilong gasket is screwed, and the nut can be screwed by the screwdriver rod, so that the nut screwing device is convenient to operate.

The inventors found that the following problems exist in the prior art in the process of implementing the present utility model: 1. the friction force is increased by adopting the nylon gasket, the nylon gasket and the screw thread generate rotation or vibration friction, so that the inner wall of the nylon gasket is worn, the friction force between the nylon gasket and the screw thread is reduced, the multiple replacement procedures are complicated, and the cost is increased; 2. depending on the elastic quality of the washer, the washer is easy to partially or completely lose elasticity under long-term compression, so that the effect of supplementing the pretightening force is lost, and therefore, a self-locking nut is provided by a person skilled in the art to solve the problems in the prior art.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a self-locking nut, wherein at least two internal threads with a jacking mechanism are additionally arranged, after a bolt or a screw is sleeved, a lug of the jacking mechanism is stressed and contracted, and meanwhile, a connecting spring is driven to contract, and the connecting spring can generate a reaction force, so that the lug is pushed out to complete the jacking and fixing effects, and meanwhile, a movable thread block with a reset spring is embedded, the thickness of the movable thread block is larger than that of the original internal threads and at least two threaded holes, so that the extrusion stress between the bolt or the screw and the movable thread block is stronger, the friction force between the bolt or the screw and the movable thread block is greatly improved, the embedded rubber ring added by the traditional nut is replaced, the nut can be repeatedly used without repeated replacement, the stability of the nut is enhanced, the anti-loosening capability is improved, the use is convenient, and the cost is low.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the self-locking nut comprises a nut body, wherein one side of the outer wall of the nut body is fixedly sleeved with a base, the other side of the outer wall of the nut body is fixedly sleeved with a nut shell, and two sides of the nut body are respectively provided with a front hole and a rear hole;

the nut comprises a nut body, and is characterized in that a plurality of internal threads are fixedly arranged on the inner wall of the nut body, a plurality of grooves are formed in one side of at least two internal threads in the plurality of internal threads, a jacking mechanism is embedded in the plurality of grooves, annular grooves are formed in the middle point of the inner wall of the nut body and the inner wall of one side close to a rear hole, and self-locking mechanisms are embedded in the two annular grooves;

through the technical scheme, the bolt or the screw is sleeved by the front hole and the rear thread, when passing through the jacking mechanism, the jacking mechanism is stressed and contracted, and simultaneously is clamped under the reaction force of the internal spring, and simultaneously, the self-locking mechanism is continuously sleeved in the process and is contracted after being stressed, and the bolt or the screw is locked again under the action of the internal reaction force, so that the anti-loosening effect is improved, and the stability is better.

Further, the nut shell is a regular hexagon shell, and one side of the nut shell, which is far away from the rear hole, is fixedly connected with the base;

through above-mentioned technical scheme, protect the outer wall of nut body, adopt regular geometry to carry out the shell preparation simultaneously to make things convenient for the centre gripping of spanner to use.

Further, the base is hollow and circular, and the grooves are respectively formed on one side of every third internal thread in the internal threads;

through the technical scheme, the groove opening amount is reduced, the manufacturing cost is reduced, the processing rate is improved, and the workload is reduced.

Further, the jacking mechanism comprises a connecting spring, one end of the connecting spring is fixedly provided with a convex block, and the other end of the connecting spring is fixedly arranged in a groove at one side of the internal thread;

through above-mentioned technical scheme, when the lug atress extrusion, the lug inwards contracts, and the connecting spring contracts simultaneously, and connecting spring can produce the reaction force to release the lug, accomplish tight fixed action in top.

Further, the protruding block penetrates through the groove and protrudes out of one side of the internal thread, and the protruding end of the protruding block and the opening of the groove are on the same side;

through the technical scheme, the lug is directly opposite to the thread after being ejected, and the ejection effect is better.

Further, the self-locking mechanism comprises a bottom plate, wherein the lower end surface of the bottom plate is fixedly provided with movable thread blocks through a plurality of reset springs, and the bottom plate is embedded into a ring groove arranged on the inner wall of the nut body;

through the technical scheme, the bottom plate is fixed, the movable threaded block is stressed and then is contracted inwards towards the annular groove, the reset spring is contracted inwards, and the reset spring generates reset elastic force, so that the movable threaded block is pushed outwards, the movable threaded block is clung to an object on the outer surface, the force pushed again is changed into friction between the movable threaded block and the object on the outer surface, the friction between the movable threaded block and the object on the outer surface is increased, and self-locking is completed without manual extrusion.

Further, the inner side of the movable thread block is fixedly provided with threads, the direction of the threads on the inner side of the nut body is consistent with that of the threads on the inner side of the nut body, and the thickness of the movable thread block is larger than that of the threads on the inner side of the nut body;

through the technical scheme, the contact surface between the bolt or the screw is enlarged, the extrusion stress is stronger, and the friction force is larger.

Further, at least one internal thread is arranged between the two self-locking mechanisms and the plurality of jacking mechanisms;

through the technical scheme, the loosening phenomenon of derailment of the contact surface caused by stress shrinkage of the self-locking mechanism is avoided.

The utility model has the following beneficial effects:

1. according to the self-locking nut provided by the utility model, at least two internal threads with the jacking mechanism are additionally arranged, after the bolt or the screw is sleeved, the protruding block of the jacking mechanism is stressed to shrink, meanwhile, the connecting spring is driven to shrink, and the connecting spring can generate a reaction force, so that the protruding block is pushed out, the jacking and fixing effects are completed, the friction force between the nut body and the bolt is increased, and the loosening of the nut body is effectively avoided.

2. According to the self-locking nut, the movable threaded block with the reset spring is embedded, the thickness of the movable threaded block is larger than that of the original internal threads and at least two threaded holes are formed, so that the extrusion stress between the bolt or the screw sleeved on the movable threaded block is stronger, the friction force between the bolt or the screw sleeved on the movable threaded block and the movable threaded block is greatly improved, the embedded rubber ring added in the traditional nut is replaced, the nut can be used repeatedly without repeated replacement, the stability of the nut is improved, the anti-loosening capability is improved, and the nut is convenient to use and low in cost.

Drawings

FIG. 1 is a schematic axial view of a self-locking nut according to the present utility model;

FIG. 2 is a schematic front cross-sectional view of a self-locking nut according to the present utility model;

FIG. 3 is an enlarged view of FIG. 2A in accordance with the present utility model;

FIG. 4 is an enlarged view of FIG. 2B in accordance with the present utility model;

fig. 5 is a schematic side cross-sectional view of the present utility model.

Legend description:

1. a base; 2. a jacking and fixing mechanism; 201. a connecting spring; 202. a bump; 3. a nut housing; 4. a rear hole; 5. an internal thread; 6. a front hole; 7. a nut body; 8. a self-locking mechanism; 801. a bottom plate; 802. a return spring; 803. a movable screw block; 9. a groove; 10. and a ring groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

Referring to fig. 1-5, one embodiment provided by the present utility model is: the self-locking nut comprises a nut body 7, wherein one side of the outer wall of the nut body 7 is fixedly sleeved with a base 1, the contact area between the nut body 7 and a fixing piece is increased, the other side of the outer wall of the nut body 7 is fixedly sleeved with a nut shell 3, the outer wall of the nut body 7 is protected, and simultaneously, the outer wall of the nut body 7 is conveniently clamped and fixed by a spanner, a front hole 6 and a rear hole 4 are respectively formed in two sides of the nut body 7, the front hole 6 is communicated with the rear hole 4, and an internal thread 5 is fixedly arranged at the inner wall of a through hole;

the nut body 7 inner wall is fixed and is provided with many internal screw threads 5, a plurality of recesses 9 have all been seted up to one side of at least two internal screw threads 5 in many internal screw threads 5, all the embedding is provided with the top solid mechanism 2 in a plurality of recesses 9, ring groove 10 has all been seted up to the inner wall midpoint of the nut body 7 and the one side inner wall department that is close to back hole 4, all the embedding is provided with self-locking mechanism 8 in two ring grooves 10, top solid mechanism 2 carries out dual with self-locking mechanism 8 and holds firmly, guarantee the stability of nut body 7, make the locking effect of nut body 7 better, accomplish the auto-lock nature of self-locking nut.

The nut shell 3 is regular hexagon shell, and one side that back hole 4 was kept away from to nut shell 3 is with base 1 fixed connection, protects the outer wall of nut body 7, adopts regular geometry to carry out the shell preparation simultaneously to make things convenient for the centre gripping of spanner to use. The base 1 is hollow circular, and a plurality of grooves 9 are respectively formed in one side of every third internal thread 5 in the plurality of internal threads 5, so that the forming amount of the grooves 9 is reduced, the manufacturing cost is reduced, the processing rate is improved, and the workload is reduced.

The jacking mechanism 2 comprises a connecting spring 201, one end of the connecting spring 201 is fixedly provided with a protruding block 202, the other end of the connecting spring 201 is fixedly arranged in a groove 9 on one side of the internal thread 5, when the protruding block 202 is pressed by force, the protruding block 202 is contracted inwards, meanwhile, the connecting spring 201 is contracted, and the connecting spring 201 can generate a reaction force, so that the protruding block 202 is pushed out, and the jacking fixing function is completed. The lug 202 penetrates through the groove 9 and protrudes out of one side of the internal thread 5, the protruding end of the lug 202 and the opening of the groove 9 are on the same side, and the lug 202 is beneficial to directly facing the thread after being ejected out, so that the ejection effect is better.

The self-locking mechanism 8 comprises a bottom plate 801, a movable thread block 803 is fixedly arranged on the lower end surface of the bottom plate 801 through a plurality of reset springs 802, the bottom plate 801 is embedded into a ring groove 10 arranged on the inner wall of a nut body 7, the bottom plate 801 is fixed, the movable thread block 803 is stressed and then contracts inwards towards the ring groove 10, the reset springs 802 contract inwards, reset spring 802 generates reset elastic force, the movable thread block 803 is pushed outwards, the movable thread block 803 is clung to an outer surface article, the pushing force is changed into friction force between the movable thread block 803 and the outer surface article, the friction force between the movable thread block 803 and the outer surface article is increased, and self-locking is completed without manual extrusion. The movable thread blocks 803 are fixedly provided with threads on the inner sides and are consistent with the threads on the inner sides of the nut bodies 7, the thickness of the movable thread blocks 803 is larger than that of the threads on the inner sides of the nut bodies 7, the contact surface between the movable thread blocks 803 and bolts or screws is enlarged, the extrusion stress is stronger, and the friction force is larger. At least one internal thread 5 is arranged between the two self-locking mechanisms 8 and the plurality of jacking mechanisms 2, so that the loose phenomenon of derailment of the contact surface caused by stress shrinkage of the self-locking mechanisms 8 is avoided.

Working principle: when the screw bolt or the screw bolt is sleeved into the nut body 7 through the front hole 6 and is provided with the rear hole 4, the internal thread 5 on the inner wall of the nut body 7 is connected with the thread on the outer wall of the screw bolt, in the continuous sleeving process of the screw bolt, the external thread of the screw bolt presses the jacking mechanism 2 and the self-locking mechanism 8, the bump 202 of the jacking mechanism 2 is stressed and contracted, meanwhile, the connecting spring 201 is driven to contract, the connecting spring 201 generates a reaction force, so that the bump 202 is pushed out to press the thread on the outer surface of the screw bolt, meanwhile, after the self-locking mechanism 8 is stressed, the movable thread block 803 is stressed and contracted inwards towards the annular groove 10, the reset spring 802 is driven to contract inwards, the reset spring 802 generates opposite reset elastic force, so that the movable thread block 803 is pushed outwards, the movable thread block 803 is clung to the outer surface of the screw bolt, the force pushed again is changed into the friction force between the two, and the friction force between the two is further increased, and the self-locking effect of friction is not required to be manually extruded to be increased.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. Self-locking nut, comprising a nut body (7), characterized in that: a base (1) is fixedly sleeved on one side of the outer wall of the nut body (7), a nut shell (3) is fixedly sleeved on the other side of the outer wall of the nut body (7), and a front hole (6) and a rear hole (4) are respectively formed in two sides of the nut body (7);

the nut comprises a nut body (7), and is characterized in that a plurality of internal threads (5) are fixedly arranged on the inner wall of the nut body (7), a plurality of grooves (9) are formed in one side of at least two internal threads (5) in the internal threads (5), a plurality of jacking mechanisms (2) are embedded in the grooves (9), annular grooves (10) are formed in the middle point of the inner wall of the nut body (7) and the inner wall of one side close to a rear hole (4), and self-locking mechanisms (8) are embedded in the annular grooves (10).

2. A self-locking nut as defined in claim 1, wherein: the nut shell (3) is a regular hexagon shell, and one side, far away from the rear hole (4), of the nut shell (3) is fixedly connected with the base (1).

3. A self-locking nut as defined in claim 1, wherein: the base (1) is hollow and circular, and the grooves (9) are respectively formed in one side of every third internal thread (5) in the internal threads (5).

4. A self-locking nut as defined in claim 1, wherein: the jacking mechanism (2) comprises a connecting spring (201), a lug (202) is fixedly arranged at one end of the connecting spring (201), and the other end of the connecting spring (201) is fixedly arranged in a groove (9) at one side of the internal thread (5).

5. The self-locking nut of claim 4, wherein: the protruding block (202) penetrates through the groove (9) and protrudes out of one side of the internal thread (5), and the protruding end of the protruding block (202) and the opening of the groove (9) are on the same side.

6. A self-locking nut as defined in claim 1, wherein: the self-locking mechanism (8) comprises a bottom plate (801), movable thread blocks (803) are fixedly arranged on the lower end face of the bottom plate (801) through a plurality of reset springs (802), and the bottom plate (801) is embedded into an annular groove (10) arranged on the inner wall of the nut body (7).

7. The self-locking nut of claim 6, wherein: the inner side of the movable thread block (803) is fixedly provided with threads, the direction of the threads is consistent with that of the inner side of the nut body (7), and the thickness of the movable thread block (803) is larger than that of the threads of the inner side of the nut body (7).

8. A self-locking nut as defined in claim 1, wherein: at least one internal thread (5) is arranged between the two self-locking mechanisms (8) and the plurality of jacking mechanisms (2).