阅读说明：本技术 一种汽车用轻量化压铆螺母 (Lightweight press-riveting nut for automobile ) 是由 周满志 于 2021-10-18 设计创作，主要内容包括：本发明公开了一种汽车用轻量化压铆螺母,涉及压铆螺母技术领域,为解决现有的压铆螺母与薄板压合后限位效果较差以及整体密实度较高的问题。所述支撑圆盘的一端设置有螺母杆,所述支撑圆盘靠近螺母杆的一面设有若干呈环形等距分布的支撑面凸型直齿,所述支撑面凸型直齿的内部均设置有半椭圆柱凹槽,所述半椭圆柱凹槽靠近支撑圆盘外环的一端设置有半椭圆柱进口,所述半椭圆柱凹槽的上端设置有限位槽,所述螺母杆靠近支撑圆盘的一端设置有螺母杆凹型直齿,螺母杆凹型直齿设置有若干个,所述螺母杆的内部设置有螺栓内盲孔,且螺栓内盲孔的开口端靠近支撑圆盘的一端,所述支撑圆盘、螺母杆和螺栓内盲孔通过冷镦一体成型。(The invention discloses a light-weight press-riveting nut for an automobile, relates to the technical field of press-riveting nuts, and aims to solve the problems that an existing press-riveting nut is poor in limiting effect and high in overall compactness after being pressed with a thin plate. The one end of supporting the disc is provided with the nut pole, the one side that the support disc is close to the nut pole is equipped with a plurality of protruding straight-teeth of holding surface that are annular equidistance and distribute, the inside of the protruding straight-teeth of holding surface all is provided with the semiellipse circular cylinder recess, the one end that the semiellipse circular cylinder recess is close to the support disc outer loop is provided with the semiellipse circular cylinder import, the upper end of semiellipse circular cylinder recess is provided with the spacing groove, the one end that the nut pole is close to the support disc is provided with the concave type straight-tooth of nut pole, and the concave type straight-tooth of nut pole is provided with a plurality of, the inside of nut pole is provided with blind hole in the bolt, and the open end of blind hole is close to the one end of supporting the disc in the bolt, the blind hole passes through cold-heading integrated into-forming in support disc, nut pole and the bolt.)

1. The utility model provides a nut is riveted to lightweight pressure for car, includes support disc (1), its characterized in that: the support disc is characterized in that a nut rod (3) is arranged at one end of the support disc (1), a plurality of convex straight teeth (10) of a support surface which are distributed in an annular equal distance are arranged on one surface, close to the nut rod (3), of the support disc (1), semi-elliptical column grooves (13) are formed in the convex straight teeth (10) of the support surface, semi-elliptical column inlets (14) are formed in one ends, close to the outer ring of the support disc (1), of the semi-elliptical column grooves (13), limiting grooves (15) are formed in the upper ends of the semi-elliptical column grooves (13), nut rod concave straight teeth (5) are arranged at one end, close to the support disc (1), of the nut rod (3), a plurality of nut rod concave straight teeth (5) are arranged, the nut rod concave straight teeth (5) are distributed in an annular equal distance, bolt inner blind holes (2) are formed in the nut rod (3), and the opening end of the bolt inner blind holes (2) is close to one end of the support disc (1), the support disc (1), the nut rod (3) and the bolt inner blind hole (2) are integrally formed through cold heading.

2. The light weight clinch nut for an automobile according to claim 1, characterized in that: blind hole (2) comprise smooth straight hole (11) and internal thread hole (12) in the bolt, and smooth straight hole (11) are located the upper end of blind hole (2) in the bolt, and internal thread hole (12) are located the lower extreme of blind hole (2) in the bolt, smooth straight hole (11) all form through cold-heading with internal thread hole (12).

3. The light weight clinch nut for an automobile according to claim 1, characterized in that: half elliptic cylinder recess (13) are close to the one end of supporting disc (1) outer loop department and are provided with half elliptic cylinder import (14), the groove face of spacing groove (15) is the trapezium structure, and along with half elliptic cylinder import (14) deepens gradually towards the other end, and the groove face of spacing groove (15) constantly reduces, be formed with the overhead kick recess between the both sides of half elliptic cylinder recess (13) and the one end of keeping away from half elliptic cylinder import (14) in spacing groove (15).

4. The light weight clinch nut for an automobile according to claim 1, characterized in that: the outside of the concave straight-teeth (5) of nut pole is provided with a rubber support section of thick bamboo (7), a rubber support section of thick bamboo (7) comprises rubber column (8) and solid fixed ring (9), rubber column (8) are provided with two, and are located the both ends of solid fixed ring (9) respectively, gu fixed ring (9) are equipped with a plurality of, gu fixed ring (9) are annular equidistance and distribute, and the both ends of solid fixed ring (9) and gu fixed ring (9) structure as an organic whole, rubber column (8) are embedded into the inside of the concave straight-teeth (5) of nut pole.

5. The light weight clinch nut for an automobile according to claim 1, characterized in that: one end, far away from the supporting disc (1), of the nut rod (3) is provided with a nut head (6), and the nut head (6) and the nut rod (3) are integrally formed through cold heading.

6. The light weight clinch nut for an automobile according to claim 1, characterized in that: the middle position of the nut rod (3) is a smooth part (4).

Technical Field

The invention relates to the technical field of press riveting nuts, in particular to a light-weight press riveting nut for an automobile.

Background

All countries around the world are implementing policies that force car manufacturers to reduce car fuel consumption. Research data show that the weight of the whole automobile is reduced by 10 percent, and the fuel efficiency can be improved by 6 to 8 percent; when the weight of the whole automobile is reduced by 100kg, the oil consumption per hundred kilometers can be reduced by 0.3-0.6 liter, and the emission of CO2 can be reduced by about 5 g/km. Therefore, the light weight of the automobile can improve the fuel efficiency and reduce the fuel consumption, thereby protecting the environment and saving the energy. Therefore, the weight reduction of automobiles has become a common consensus of automobile enterprises. On the premise of ensuring the quality of the automobile, the light automobile parts are more and more widely used.

Among the auto parts, the nut is riveted as installing in the part of metal plate body to the pressure, is applied to the nut on sheet metal or panel beating, and the appearance is circularly, and one end has knurling tooth and guide way. The principle is that the embossing teeth are pressed into the preset hole positions of the metal plate, generally, the aperture of each preset hole is slightly smaller than the embossing teeth of the press riveting nut, the embossing teeth of the press riveting nut are extruded into the plate through pressure, the periphery of each preset hole generates plastic deformation, and a deformed object is extruded into the guide groove, so that the locking effect is achieved.

However, the existing press-riveting nut has some defects in the using process: firstly, most of the existing press-riveting nuts have poor limiting effect after being pressed with a thin plate, and the press-riveting nuts are easy to loosen with the thin plate along with long-time use; secondly, the whole compactness of pressure rivet nut is higher, along with the big batch use of pressure rivet nut on the sheet metal, is not conform to the requirement that the lightweight of car generated, consequently does not satisfy current demand, to this we provide a lightweight pressure rivet nut for car.

Disclosure of Invention

The invention aims to provide a light-weight press-riveting nut for an automobile, and aims to solve the problems that the press-riveting nut and a thin plate are poor in limiting effect and high in overall compactness after being pressed together in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the light-weight press-riveting nut for the automobile comprises a supporting disk, wherein a nut rod is arranged at one end of the supporting disk, one surface of the supporting disk close to the nut rod is provided with a plurality of annular convex straight teeth of supporting surface which are distributed at equal intervals, the insides of the convex straight teeth of the supporting surface are provided with semi-elliptic cylinder grooves, one end of each semi-elliptic cylinder groove, which is close to the outer ring of the supporting disc, is provided with a semi-elliptic cylinder inlet, the upper end of the semi-elliptic cylinder groove is provided with a limit groove, one end of the nut rod close to the support disc is provided with a plurality of nut rod concave straight teeth, the concave straight teeth of the nut rod are distributed in a ring shape at equal intervals, the nut rod is internally provided with blind holes in the bolt, and the open end of the blind hole in the bolt is close to one end of the supporting disk, and the supporting disk, the nut rod and the blind hole in the bolt are integrally formed through cold heading.

Preferably, the blind hole comprises smooth straight hole and internal thread hole in the bolt, and smooth straight hole is located the upper end of blind hole in the bolt, and the internal thread hole is located the lower extreme of blind hole in the bolt, smooth straight hole all passes through the cold-heading shaping with the internal thread hole.

Preferably, the one end that the semi-elliptic cylinder recess is close to and supports disc outer loop department is provided with the import of semi-elliptic cylinder, the groove face of spacing groove is the trapezium structure, and along with the import of semi-elliptic cylinder deepens gradually towards the other end, and the groove face of spacing groove constantly reduces, be formed with the overhead kick recess between the both sides of the one end that the semi-elliptic cylinder import was kept away from to the spacing groove and semi-elliptic cylinder recess.

Preferably, the outside of the concave straight-teeth of nut pole is provided with a rubber support section of thick bamboo, a rubber support section of thick bamboo comprises rubber post and solid fixed ring, the rubber post is provided with two, and is located solid fixed ring's both ends respectively, gu fixed ring is equipped with a plurality of, gu fixed ring is annular equidistance and distributes, and gu fixed ring's both ends and solid fixed ring structure as an organic whole, the rubber post imbeds to the inside of the concave straight-teeth of nut pole.

Preferably, one end of the nut rod, which is far away from the supporting disk, is provided with a nut head, and the nut head and the nut rod are integrally formed through cold heading.

Preferably, the middle position of the nut stem is a smooth portion.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention is characterized in that a plurality of annularly distributed convex straight teeth of a supporting surface are arranged on one surface of a supporting disc close to a nut rod, the convex straight teeth of the supporting surface are composed of a semi-elliptic cylinder groove, a semi-elliptic cylinder inlet and a limiting groove, the convex straight teeth of the supporting surface are extruded and embedded into a thin plate in the process of pressing the thin plate, the groove surface of the limiting groove is in a trapezoidal structure, the semi-elliptic cylinder groove is positioned under the limiting groove, the groove surface of the limiting groove is continuously reduced as the semi-elliptic cylinder inlet is gradually deepened towards the other end, so as to form a cover on two sides of the semi-elliptic cylinder groove, therefore, the semi-elliptic cylinder groove gradually forms a barbed groove from the semi-elliptic cylinder inlet towards the inner side, the metal thin plate is simultaneously embedded into the semi-elliptic cylinder groove after being pressed until the convex straight teeth of the supporting surface are completely embedded into the metal thin plate, and the metal extends towards the barbed grooves on two sides of the semi-elliptic cylinder groove under the action of the internal stress, until filling the overhead kick recess, through this kind of mode, can make the protruding type straight-tooth of holding surface improve the sheet metal effectively and press the spacing effect of riveting the nut, prevent to press and rivet the antitorque rotation of nut, prevent simultaneously that the product from droing, the stamping equipment integration machine-shaping of being convenient for of the design of half cylindroid import in addition simplifies the limit structure processing degree of difficulty under the prerequisite of guaranteeing fixed effect, further improves product production efficiency.

2. According to the invention, a plurality of nut rod concave straight teeth which are distributed in an annular and equidistant manner are arranged at one end of the nut rod close to the supporting disc, the rod part deforms and bulges in the use process, the nut rod concave straight teeth are embedded into the thin plate through extrusion, the thin plate is clamped and locked up with the nut supporting disc up and down, the product is prevented from slipping, meanwhile, a rubber supporting cylinder is arranged, the rubber supporting cylinder is composed of fixing rings which are distributed at two ends and a plurality of rubber columns which are distributed in an annular and equidistant manner, the rubber columns are embedded into concave straight tooth grooves of the nut rod, and the gap area between the nut rod concave straight teeth and the thin plate is filled under the elastic material of the rubber columns, so that the compactness between the thin plate and the rivet nut is further improved, meanwhile, the rubber supporting cylinder is light in weight, and the light weight requirement of the product is met.

3. The invention utilizes the accurate blanking system of the high-speed multi-stroke cold header to carry out blanking, the blank is subjected to material chamfering and shaping by an automatic feeding system, so that the uneven material generated by shearing of the product becomes smooth and flat, the blank is mutually matched with a cold header through a front punch, a main die, a push pipe, a striking rod, a spring and the like to form a riveting nut disc, a rod part, a supporting surface convex tooth, a rod part concave tooth and a smooth straight hole, corresponding threads are manufactured in a blind hole through automatic extrusion of a hole thread, and then the whole hardness of the product is uniform and consistent by using vacuum bright heat treatment. The production and processing of the rivet pressing nut are realized, the characteristics of high dimensional accuracy, high material utilization rate, high production efficiency, stable production, high product strength and the like of cold heading and cold extrusion are fully utilized, continuous feeding is realized by adopting common wire rod, the production efficiency is further improved, and the rivet pressing nut is formed by a cold heading forming process, has good cold-work hardening characteristic, and increases the overall strength of products.

Drawings

FIG. 1 is a perspective exploded view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a sectional view showing the internal structure of the present invention;

FIG. 4 is a left side view of the present invention;

FIG. 5 is a right side view of the present invention;

FIG. 6 is an enlarged view of a portion of the area A of FIG. 4 in accordance with the present invention;

fig. 7 is a perspective view of the convex spur of the bearing surface of the present invention.

In the figure: 1. a support disc; 2. a bolt mounting opening; 3. a nut stem; 4. a smooth portion; 5. a nut rod is provided with a concave straight tooth; 6. a nut head; 7. a rubber support cylinder; 8. a rubber column; 9. a fixing ring; 10. a supporting surface convex straight tooth; 11. smooth straight holes; 12. an internally threaded bore; 13. a semi-elliptic cylinder groove; 14. a semi-elliptic cylinder inlet; 15. a limiting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-7, an embodiment of the present invention is shown: a light-weight rivet pressing nut for an automobile comprises a supporting disc 1, a nut rod 3 is arranged at one end of the supporting disc 1, a plurality of supporting surface convex straight teeth 10 distributed in an annular equal distance are arranged on one surface, close to the nut rod 3, of the supporting disc 1, semi-elliptical column grooves 13 are formed in the supporting surface convex straight teeth 10, a semi-elliptical column inlet 14 is formed in one end, close to the outer ring of the supporting disc 1, of each semi-elliptical column groove 13, limiting grooves 15 are formed in the upper ends of the semi-elliptical column grooves 13, nut rod concave straight teeth 5 are arranged at one end, close to the supporting disc 1, of the nut rod 3, a plurality of nut rod concave straight teeth 5 are arranged, the concave straight teeth 5 of the nut rod are distributed in a ring shape at equal intervals, the inner part of the nut rod 3 is provided with a blind hole 2 in the bolt, and the open end of the blind hole 2 in the bolt is close to one end of the supporting disk 1, and the supporting disk 1, the nut rod 3 and the blind hole 2 in the bolt are integrally formed through cold heading.

Further, blind hole 2 comprises smooth straight hole 11 and internal thread hole 12 in the bolt, and smooth straight hole 11 is located the upper end of blind hole 2 in the bolt, and internal thread hole 12 is located the lower extreme of blind hole 2 in the bolt, and smooth straight hole 11 all passes through the cold-heading shaping with internal thread hole 12, and the internal thread hole 12 of pressure-riveting nut is extrusion screw thread on the basis of cold-heading blind hole, and pressure-riveting nut internal thread hole 12 can design by oneself according to service environment.

Further, the one end that half cylindroid recess 13 is close to support disc 1 outer loop department is provided with half cylindroid import 14, the groove face of spacing groove 15 is the trapezium structure, and along with half cylindroid import 14 deepens gradually towards the other end, the groove face of spacing groove 15 constantly dwindles, be formed with the overhead kick recess between the one end that half cylindroid import 14 was kept away from to spacing groove 15 and the both sides of half cylindroid recess 13, through this kind of mode, can make the protruding type straight-tooth 10 of holding surface improve the spacing effect of sheet metal and pressure rivet nut effectively, prevent the antitorque rotation of pressure rivet nut, prevent simultaneously that the product from droing.

Further, the outside of the concave type straight-tooth of nut pole 5 is provided with a rubber support section of thick bamboo 7, a rubber support section of thick bamboo 7 comprises rubber column 8 and solid fixed ring 9, rubber column 8 is provided with two, and be located solid fixed ring 9's both ends respectively, solid fixed ring 9 is equipped with a plurality of, gu fixed ring 9 is annular equidistance and distributes, and gu fixed ring 9's both ends and solid fixed ring 9 structure as an organic whole, rubber column 8 imbeds to the inside of the concave type straight-tooth of nut pole 5, further improve the compactness between sheet metal and the rivet nut, a rubber support section of thick bamboo quality is light simultaneously, satisfy the lightweight demand of this product.

Further, one end of the nut rod 3, which is far away from the support disk 1, is provided with a nut head 6, and the nut head 6 and the nut rod 3 are integrally formed through cold heading.

Further, the middle position of the nut stem 3 is a smooth portion 4.

The working principle is as follows: the accurate blanking system of the high-speed multi-stroke cold header is utilized for blanking, blanks are subjected to material chamfering and shaping by an automatic feeding system, uneven materials generated by shearing of products become smooth and flat, the blanks are subjected to mutual matching of a cold header forward punch, a main die, a push pipe, a striking rod, a spring and the like to form a riveting nut disc, a rod part, a supporting surface convex tooth, a rod part concave tooth and a smooth straight hole, corresponding threads are manufactured in a blind hole through automatic extrusion of a hole thread, then the overall hardness of the products is uniform and consistent by using vacuum bright heat treatment, the production and processing of the riveting nut are realized, in the process of laminating with a thin plate, the supporting surface convex straight teeth 10 are extruded and embedded into the thin plate, as the groove surface of a limiting groove 15 is of a trapezoidal structure, and a semi-elliptic column groove 13 is positioned under the limiting groove 15, and as a semi-elliptic column inlet 14 gradually deepens towards the other end, the groove surface of the limiting groove 15 is continuously reduced to form covering on two sides of the semi-elliptic cylinder groove 13, therefore, the semi-elliptic cylinder groove 13 is gradually formed into a barbed groove towards the inner side by the semi-elliptic cylinder inlet 14, the metal sheet is simultaneously embedded into the semi-elliptic cylinder groove 13 after being pressed until the convex straight teeth 10 of the supporting surface are completely embedded into the metal sheet, the metal extends towards the barbed grooves on two sides of the semi-elliptic cylinder groove 13 under the action of internal stress until the barbed grooves are filled, meanwhile, the nut rod 3 deforms and bulges in the using process, the concave straight teeth 5 of the nut rod are embedded into the metal sheet through extrusion, the metal sheet is clamped and locked with the nut supporting disc 1 up and down, the product slippage is prevented, meanwhile, the gap area between the concave straight teeth 5 of the nut rod and the metal sheet is filled under the elastic material of the rubber column 8, and the compactness between the metal sheet and the rivet pressing nut is further improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.