CN221647382U - Anti-loosening press-riveting nut - Google Patents

Abstract

The utility model discloses an anti-loosening press-riveting nut which comprises a nut body, wherein a meshing part fixedly connected with the nut body is extended at one end of the nut body, a plurality of teeth are arranged on the periphery of the meshing part, grooves are formed between adjacent teeth, an inner hole penetrating through the meshing part is formed in the nut body, an inner thread is arranged in the inner hole, a punching opening is formed in the nut body close to the inner hole, a punching block is formed on one side of the punching opening close to the meshing part, and the punching block protrudes out of the inner surface of the inner thread. The press riveting nut has good anti-loosening effect, and one screw tooth of the internal thread deforms towards the direction close to the other adjacent screw tooth by the extrusion of the punching opening, so that a punching block protruding out of the inner surface of the internal thread is generated. The external thread of the bolt is in interference fit with the internal thread of the press-riveting nut through the press-riveting block, so that larger friction force is generated between the external thread and the internal thread on the bolt, the press-riveting nut can be fastened with the bolt connection, and the problem that the bolt is easy to loosen when the press-riveting nut bears impact load is effectively avoided.

Description

Anti-loosening pressure rivet nut

Technical Field

The utility model relates to an anti-loosening pressure rivet nut and belongs to the technical field of fasteners.

Background Art

Self-clinching nuts are a type of nut used on thin plates or sheet metals. They are widely used in the assembly of electromechanical and light industrial products such as automobiles, aviation, railways, refrigeration, elevators, switches, instruments, furniture, and decorations.

However, for special assembly fields such as automobile engines where vibrations often occur, existing self-clinching nuts are prone to shaking when subjected to vibration impact loads, causing the bolts connected to them by threads to easily loosen, making the connection between the self-clinching nuts and the bolts loose and easy to separate, posing a safety hazard to the use of the assembled workpiece.

Utility Model Content

In order to solve the above problems, the utility model provides an anti-loosening rivet nut, which has a good anti-loosening effect. It can enhance the connection strength between the rivet nut and the bolt to prevent the bolt from loosening, making the connection between the external thread of the bolt and the internal thread of the rivet nut more firmly, and effectively avoiding the problem that the bolt is easy to loosen when the rivet nut is subjected to vibration impact loads.

The utility model aims to provide an anti-loosening pressure rivet nut, comprising a nut body, one end of the nut body extending with a meshing portion fixedly connected thereto, the outer periphery of the meshing portion being provided with a plurality of teeth, grooves being formed between adjacent teeth, an inner hole penetrating the meshing portion being provided in the nut body, the inner hole being provided with an internal thread, a stamping opening being provided on the nut body near the inner hole, a stamping block being formed on one side of the stamping opening near the meshing portion, and the stamping block protruding from the inner surface of the internal thread.

In an implementation manner of the utility model, the stamping opening is arranged on an end surface of the nut body on a side away from the meshing portion.

In one implementation manner of the utility model, there are multiple punching openings, and the multiple punching openings are arranged around the inner hole.

In one implementation manner of the utility model, the cross-sections of the nut body and the meshing portion along the radial direction are both in the shape of an annulus, and the outer diameter of the meshing portion is smaller than the outer diameter of the nut body.

In an implementation manner of the present invention, the thickness of the meshing portion is smaller than the thickness of the nut body.

In an implementation manner of the utility model, the nut body and the meshing portion are coaxial hollow cylinders.

In an implementation manner of the utility model, the nut body and the meshing portion are an integrated structure.

In one embodiment of the utility model, one end of the tooth close to the nut body is in contact with the nut body, and the other end is spaced apart from the end face of the meshing portion away from the nut body; a plurality of teeth are arranged around the outer surface of the meshing portion.

In one implementation manner of the present invention, the cross section of the tooth is an oblique triangle or an oblique trapezoid.

In an implementation manner of the utility model, an inwardly recessed annular groove is provided on the outer periphery of the meshing portion, and the annular groove is located on a side of the tooth away from the nut body.

Beneficial Effects

(1) When the rivet nut provided by the utility model is fixed on the workpiece to be fixed, the meshing part is in full contact with the workpiece to be fixed during the fixing process and is squeezed by an external force. The meshing part is pressed into the preset hole position of the workpiece through the teeth, and the teeth of the rivet nut are squeezed into the workpiece through pressure, so that the periphery of the preset hole is plastically deformed, and the deformed object is squeezed into the groove, thereby producing a good locking effect, so that it is not easy for the rivet nut and the workpiece to rotate relative to each other, and the anti-torsion ability is strong, which can meet the use requirements of the workpiece that needs to be fixed by a large torque. In addition, while the periphery of the preset hole is plastically deformed, the deformed object will also be squeezed into the annular groove of the meshing part, and the deformed object in the annular groove forms a locking ring, which can make the rivet nut tightly fixed on the workpiece, and the connection strength between the rivet nut and the workpiece is high, and it is not easy to shake, which can effectively prevent the rivet nut from falling off from the workpiece. The utility model uses the teeth and the annular groove to simultaneously play the role of reinforcing the locking, improve the torsion resistance, improve the anti-rotation effect, and have a better locking effect, which can effectively prevent the rivet nut from falling off from the workpiece.

(2) The anti-loosening rivet nut provided by the utility model has a good anti-loosening effect. It uses a stamping method to stamp the internal thread from the end face of the nut body away from the meshing part to produce a stamping hole. Due to the extrusion of the stamping hole, one thread of the internal thread is deformed in the direction of approaching another adjacent thread, thereby producing a stamping block. In addition, the stamping block protrudes from the inner surface of the internal thread. When the bolt is screwed into the rivet nut, the external thread of the bolt and the internal thread of the rivet nut are interference-fitted through the formed stamping block, thereby generating a large friction force between the external thread and the internal thread on the bolt, so that the rivet nut can be more tightly connected to the bolt and is not easy to loosen, effectively avoiding the problem of the bolt being easily loosened when the rivet nut is subjected to vibration impact loads.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a three-dimensional view of the anti-loosening pressure rivet nut provided by the utility model.

FIG. 2 is a stereoscopic view of the anti-loosening rivet nut provided by the utility model from another perspective.

FIG3 is a top view of the anti-loosening rivet nut provided by the utility model.

FIG. 4 is a bottom view of the anti-loosening rivet nut provided by the utility model.

FIG5 is a front view of the anti-loosening rivet nut provided by the utility model.

Fig. 6 is a cross-sectional view taken along the line A-A in Fig. 5 .

In the figure: 1. nut body; 2. meshing part; 3. teeth; 4. groove; 5. stamping hole; 6. stamping block; 7. inner hole; 8. internal thread; 9. annular groove.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

As shown in Figures 1-6, this embodiment provides an anti-loosening pressure rivet nut, including a nut body 1, one end of the nut body 1 is extended with a meshing portion 2 fixedly connected thereto, the outer periphery of the meshing portion 2 is provided with a plurality of teeth 3, and grooves 4 are formed between adjacent teeth 3, an inner hole 7 penetrating the meshing portion 2 is provided in the nut body 1, the inner hole 7 is provided with an internal thread 8, the nut body 1 is provided with a stamping hole 5 near the inner hole 7, and a stamping block 6 is formed on one side of the stamping hole 5 near the meshing portion 2, and the stamping block 6 protrudes from the inner surface of the internal thread 8.

Optionally, the cross-sectional shape of the punching opening 5 and the punching block 6 along the radial direction may be a triangle, a square, an ellipse, a semicircle, etc., which is not specifically limited. The radial direction refers to the axial direction of the inner hole 7 .

The anti-loosening rivet nut provided in this embodiment of the utility model is punched from the end face of the nut body 1 away from the meshing portion 2 to punch the internal thread 8 to produce a punching hole 5. Due to the extrusion of the punching hole 5, one thread of the internal thread 8 is deformed in the direction of approaching another adjacent thread, thereby producing a punching block 6. And the punching block 6 protrudes from the inner surface of the internal thread 8. When the bolt is screwed into the rivet nut, the external thread of the bolt and the internal thread 8 of the rivet nut are interference-fitted through the formed punching block 6, thereby generating a large friction force between the external thread on the bolt and the internal thread 8, so that the rivet nut can be more tightly connected to the bolt and is not easy to loosen, effectively avoiding the problem of the bolt being easily loosened when the rivet nut is subjected to vibration impact load.

Optionally, in some embodiments, the punching opening 5 is provided on an end surface of the nut body 1 away from the meshing portion 2 .

In this embodiment, the punching opening 5 is arranged on the end face of the nut body 1 , which not only makes punching convenient and quick and saves punching costs, but also enables the bolt to be screwed into the internal thread 8 of the inner hole 7 and firmly connected to the internal thread 8 .

Optionally, in some embodiments, there are multiple punching openings 5 , and the multiple punching openings 5 are arranged around the inner hole 7 .

In this embodiment, in order to further improve the reliability of the installation of the bolt and the rivet nut, a plurality of punching holes 5 can be set, and the plurality of punching holes 5 produce a plurality of punching blocks 6, so that multiple positions of the internal thread 8 are deformed, thereby increasing the friction between the external thread and the internal thread 8 of the bolt, so that the rivet nut can be more tightly connected to the bolt and is not easy to loosen.

Optionally, in some embodiments, the radial cross-sections of the nut body 1 and the meshing portion 2 are both in the shape of circular rings, and the outer diameter of the meshing portion 2 is smaller than the outer diameter of the nut body 1 .

Optionally, in some embodiments, the thickness of the engagement portion 2 is smaller than the thickness of the nut body 1 .

Optionally, in some embodiments, the nut body 1 and the engaging portion 2 are coaxial hollow cylinders.

Optionally, in some embodiments, the nut body 1 and the meshing portion 2 are an integrated structure. This structure makes the strength of the entire anti-loosening pressure rivet nut higher, meeting the high-strength connection requirements between it and the workpiece.

Optionally, in some embodiments, one end of the tooth 3 close to the nut body 1 is in contact with the nut body 1, and the other end is spaced apart from the end face of the meshing portion 2 away from the nut body 1; a plurality of teeth 3 are arranged around the outer surface of the meshing portion 2.

Optionally, the cross section of the tooth 3 is an oblique triangle or an oblique trapezoid.

The outer diameter of the meshing portion 2 provided in this embodiment of the utility model is smaller than the outer diameter of the nut body 1, so that the meshing portion 2 can be pressed into the preset hole position of the workpiece through the teeth 3. The teeth 3 of the rivet nut are squeezed into the workpiece by pressure, causing plastic deformation around the preset hole, and the deformed object is squeezed into the groove 4, thereby producing a locking effect.

Optionally, in some embodiments, an inwardly recessed annular groove 9 is provided on the outer periphery of the meshing portion 2 , and the annular groove 9 is located on a side of the tooth 3 away from the nut body 1 .

When in use, when the rivet nut is fixed on the workpiece to be fixed, the meshing portion 2 is in full contact with the workpiece to be fixed during the fixing process and is squeezed by an external force. The meshing portion 2 is pressed into the preset hole position of the workpiece through the teeth 3, and the teeth 3 of the rivet nut are squeezed into the workpiece through pressure, so that the periphery of the preset hole is plastically deformed, and the deformed object is squeezed into the groove 4, thereby producing a good locking effect, making it difficult for the rivet nut and the workpiece to rotate relative to each other, and having strong anti-torsion ability, which can meet the use requirements of the workpiece that needs to be fixed by a large torque. In addition, while the periphery of the preset hole is plastically deformed, the deformed object will also be squeezed into the annular groove 9 of the meshing portion 2, and the deformed object in the annular groove 9 forms a locking ring, which can make the rivet nut tightly fixed on the workpiece, and the connection strength between the rivet nut and the workpiece is high, and it is not easy to shake, which can effectively prevent the rivet nut from falling off the workpiece. The utility model uses the teeth 3 and the annular groove 9 to simultaneously strengthen the locking function, thereby improving the torsion resistance and the anti-rotation effect, providing a better locking effect and being able to effectively prevent the rivet nut from falling off the workpiece.

In addition, the anti-loosening rivet nut provided by the utility model has a good anti-loosening effect. It uses a stamping method to stamp the internal thread 8 from the end face of the nut body 1 away from the meshing portion 2 to produce a stamping opening 5. Due to the extrusion of the stamping opening 5, one thread of the internal thread 8 is deformed in the direction of approaching another adjacent thread, thereby producing a stamping block 6. In addition, the stamping block 6 protrudes from the inner surface of the internal thread 8. When the bolt is screwed into the rivet nut, the external thread of the bolt and the internal thread 8 of the rivet nut are interference-fitted through the formed stamping block 6, thereby generating a large friction force between the external thread on the bolt and the internal thread 8, so that the rivet nut can be more tightly connected to the bolt and is not easy to loosen, effectively avoiding the problem that the bolt is easy to loosen when the rivet nut is subjected to vibration impact load.

The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

The principles and implementation methods of the utility model are described in this article using specific examples. The description of the above examples is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, the utility model can also be improved and modified without losing the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model. Therefore, the scope of protection of the utility model patent shall be based on the attached claims.

Claims (10)

1. An anti-loosening pressure rivet nut, characterized in that it includes a nut body, one end of the nut body extends with a meshing portion fixedly connected thereto, the outer periphery of the meshing portion is provided with a plurality of teeth, and grooves are formed between adjacent teeth, an inner hole penetrating the meshing portion is provided in the nut body, the inner hole is provided with an internal thread, the nut body is provided with a stamping opening near the inner hole, a stamping block is formed on one side of the stamping opening near the meshing portion, and the stamping block protrudes from the inner surface of the internal thread. 2. The anti-loosening rivet nut according to claim 1 is characterized in that the punching hole is arranged on the end surface of the nut body away from the meshing portion. 3. The anti-loosening rivet nut according to claim 2 is characterized in that there are multiple punching holes, and the multiple punching holes are arranged around the inner hole. 4. The anti-loosening pressure rivet nut according to claim 1 is characterized in that the radial cross-sections of the nut body and the meshing portion are both in a circular ring shape, and the outer diameter of the meshing portion is smaller than the outer diameter of the nut body. 5. The anti-loosening rivet nut according to claim 4, characterized in that the thickness of the meshing portion is smaller than the thickness of the nut body. 6. The anti-loosening self-clinching nut according to claim 4, characterized in that the nut body and the meshing portion are coaxial hollow cylinders. 7. The anti-loosening self-clinching nut according to claim 4, characterized in that the nut body and the meshing portion are an integrated structure. 8. The anti-loosening rivet nut according to claim 1 is characterized in that one end of the tooth close to the nut body is in contact with the nut body, and the other end is spaced apart from the end face of the meshing portion away from the nut body; a plurality of the teeth are arranged around the outer surface of the meshing portion. 9. The anti-loosening rivet nut according to claim 8, characterized in that the cross-section of the teeth is an oblique triangle or an oblique trapezoid. 10. The anti-loosening self-clinching nut according to claim 8, characterized in that an inwardly recessed annular groove is provided on the outer periphery of the meshing portion, and the annular groove is located on a side of the tooth away from the nut body.