Novel automobile seat screw and die thereof

Abstract

The novel automobile seat screw comprises a screw head, a screw table connected to the rear end of the screw head, a screw rod connected to the rear end of the screw table and a screw tail column connected to the rear end of the screw rod, an inner hexagonal groove is formed in the center of the screw head, and the height of the screw table is at least two times that of the screw head. The outer diameter of the screw table is smaller than that of the screw head, the outer diameter of the screw rod is smaller than that of the screw table, the outer diameter of the screw tail column is smaller than that of the screw rod, the length of the screw rod is at least larger than the sum of the height of the screw table and the height of the screw head, and an anti-loosening mechanism is arranged in a thread area of the screw rod. According to the scheme, the screw overcomes the problems that the mechanical strength, fatigue resistance and wear resistance of a common screw cannot stand the tests of long-time, long-distance and jolting ways of an automobile, people sit up and sit down on a seat for multiple times and swing along with the automobile, and the common screw is loosened or broken or damages the seat.

Description

Technical Field

[0001] The utility model relates to the field of screw production, in particular to a new type of automotive seat screw and its mold. Background Art

[0002] New energy vehicles are specifically divided into six categories: hybrid vehicles, pure electric vehicles, fuel cell vehicles, alcohol ether fuel vehicles, natural gas vehicles, etc. These new energy vehicles use unconventional vehicle fuels as power sources and integrate advanced technologies in vehicle power control and drive, forming new types of vehicles with new technologies, new structures, and advanced technical principles.

[0003] To meet the company's R & D and production needs for new fastener products supporting new types of vehicles, such as new types of automotive seat screws, higher quality requirements have been put forward. In order to overcome the quality hazards existing in existing automotive seat screws: the mechanical strength, fatigue resistance, and wear resistance of the screws cannot withstand the tests of long time, long distance, bumpy roads, multiple sitting and rising of people on the seat, and vehicle swing, resulting in problems such as loosening, breaking, or damage to the seat. This solution provides a new type of automotive seat screw and its mold. Summary of the Utility Model

[0004] The invention purpose of the utility model is to solve the problems existing in existing automotive seat screws, where the mechanical strength, fatigue resistance, and wear resistance of the screws cannot withstand the tests of long time, long distance, bumpy roads, multiple sitting and rising of people on the seat, and vehicle swing, resulting in loosening, breaking, or damage to the seat. The specific solution is as follows:

[0005] A new type of automotive seat screw includes a screw head, a screw platform connected to the rear end of the screw head, a screw rod connected to the rear end of the screw platform, and a screw tail column connected to the rear end of the screw rod. An internal hexagonal groove is provided in the center of the screw head. The height of the screw platform is at least twice the height of the screw head. The outer diameter of the screw platform is smaller than the outer diameter of the screw head. The outer diameter of the screw rod is smaller than the outer diameter of the screw platform. The outer diameter of the screw tail column is smaller than the outer diameter of the screw rod. The length of the screw rod is at least greater than the sum of the heights of the screw platform and the screw head. A loosening prevention mechanism is provided in the threaded area of the screw rod.

[0006] Further, the outer diameter of the screw head is 19.0 ± 0.3 mm, and the height of the screw head is 4.3 ± 0.1 mm.

[0007] Further, the outer diameter of the screw platform is 12.0 ± 0.1 mm, and the height of the screw platform is 6.6 ± 0.1 mm.

[0008] Further, the outer diameter of the screw rod is 7.79 - 7.96 mm, and the length of the screw rod is 11.7 ± 0.2 mm.

[0009] Furthermore, the outer diameter of the screw tail post is 5.5 ± 0.1 mm.

[0010] Furthermore, the anti-loosening mechanism is an adhesive layer.

[0011] A new type of automobile seat screw mold for manufacturing the above-mentioned new type of automobile seat screw, comprising a male mold and a female mold. The male mold includes a punch fixedly connected to a punching machine base. The female mold includes a sleeve, a rear cover provided at the rear end of the sleeve and threadedly connected thereto, a mold top provided in the sleeve and the rear cover, a female mold insert provided at the center of the front end of the sleeve. The front end of the female mold insert is flush with the front end face of the sleeve, and the rear end of the female mold insert abuts against the front end of the mold top.

[0012] Furthermore, the female mold insert includes a frustum-shaped sleeve piece with a small front end and a large rear end. The rear half of the sleeve piece wraps a mold core, the front half of the sleeve piece wraps a first wire piece that is hollow and penetrates through from front to back. The rear part of the first wire piece wraps a second wire piece. The rear end of the second wire piece is flush with the rear end of the first wire piece and simultaneously abuts against the front end of the mold core. The rear end of the mold core is flush with the rear end of the sleeve piece and simultaneously abuts against the front end of the mold top.

[0013] Furthermore, the space between the front end face of the second wire piece and the front end face of the first wire piece matches the screw head. A first cylindrical cavity that penetrates through from front to back is provided at the center of the second wire piece, and the first cylindrical cavity matches the screw platform. A second cylindrical cavity that penetrates through from front to back is provided at the center of the mold core, and the second cylindrical cavity matches the screw rod and the screw tail post.

[0014] Furthermore, a notch that penetrates through from front to back is provided on the lower side wall of the sleeve piece. A step is provided in the middle of the mold top, and the step abuts against the front end face of the rear cover. A thimble cavity that penetrates through from front to back is provided at the center of the mold top.

[0015] In summary, adopting the technical solution of the present utility model has the following beneficial effects:

[0016] In this solution, the screw adopts a screw head that is higher than that of ordinary screws, and a screw table is provided between the screw head and the screw rod. A first-level step is formed at the joint of the screw head and the screw table, a second-level step is formed at the joint of the screw table and the screw rod, and a third-level step is formed at the joint of the screw rod and the screw tail post. This unique three-level step structure has the following advantages: The first step enables the screw head to pull the first locking member (such as a seat) towards the second locking member (such as a seat mounting base), and the screw head generates pressure on the first locking member. The second step enables the screw table to disperse screw fatigue, improve mechanical strength and wear resistance, further pull the first locking member towards the second locking member, and the screw table generates pressure on the second locking member. The third step enables the thread to tightly lock the second locking member, and the screw tail post has the advantages of convenient installation and quick positioning (including quickly passing through the hole of the first locking member and quickly entering the hole of the second locking member), and improving the working efficiency of installing the screw. A loosening prevention mechanism is provided in the threaded area of the screw rod, effectively preventing the thread from loosening. The screw in this solution overcomes the problems of ordinary screws, such as insufficient mechanical strength, fatigue resistance, and wear resistance to withstand the long-term, long-distance, bumpy journey of the vehicle, multiple sitting and standing of people on the seat, and the swinging of the vehicle along with it, resulting in loosening, breakage, or damage to the seat. The mold in this solution adopts a structure in which a conical sleeve piece wraps the mold core and the first wire piece, and the second wire piece is further wrapped in the first wire piece, forming a firm conical female mold insert that has an interference fit with the conical groove wall at the front end of the sleeve. It has the advantages of large wrapping force and no loosening during stamping. Moreover, the structure of wrapping the second wire piece with the first wire piece can not only improve the mechanical strength of the female mold, but also facilitate the maintenance of the mold and the replacement of locally worn parts, reduce the maintenance cost, and at the same time have the advantage of being compatible with the manufacturing of other specifications of screws and sharing this set of female molds. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only a part of the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a structural diagram of a new type of automotive seat screw of the present invention;

[0019] Figure 2 is Figure 1 the left view of;

[0020] Figure 3 It is a schematic cross-sectional view of the female mold of a new type of automotive seat screw mold of the present invention;

[0021] Figure 4 It is the front view of the sleeve piece of the present invention

[0022] Figure 5 Cross-sectional view of the punch of the present utility model;

[0023] Figure 6 is Figure 5 left view of

[0024] Explanation of reference numerals in the drawings:

[0025] 10 - screw head, 11 - internal hexagonal groove, 20 - screw platform, 30 - screw rod, 31 - threaded area, 32 - glue coating layer, 40 - screw tail post, 50 - male mold, 51 - punch, 511 - punch head, 512 - punch body, 513 - punch tail, 60 - female mold, 61 - sleeve, 62 - rear cover, 620 - rear cavity, 63 - mold top, 630 - ejector pin cavity, 631 - step, 64 - sleeve piece, 641 - notch, 65 - mold core, 650 - second cylindrical cavity, 66 - first wire piece, 67 - second wire piece, 670 - first cylindrical cavity. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0027] As Figures 1 to 2 shown, a new type of automotive seat screw includes a screw head 10, a screw platform 20 connected to the rear end of the screw head 10, a screw rod 30 connected to the rear end of the screw platform 20, and a screw tail post 40 connected to the rear end of the screw rod 30. An internal hexagonal groove 11 is provided at the center of the screw head 10. The height of the screw platform 20 is at least twice the height of the screw head 10. The outer diameter of the screw platform 20 is smaller than the outer diameter of the screw head 10. The outer diameter of the screw rod 30 is smaller than the outer diameter of the screw platform 20. The outer diameter of the screw tail post 40 is smaller than the outer diameter of the screw rod 30. The length of the screw rod 30 is at least greater than the sum of the heights of the screw platform 20 and the screw head 10. A loosening prevention mechanism is provided in the threaded area 31 of the screw rod 30.

[0028] Preferably, the diameter of the circumscribed circle of the internal hexagonal groove 11 is 7.93 mm.

[0029] Preferably, the outer diameter of the screw head 10 is 19.0 ± 0.3 mm, and the height of the screw head 10 is 4.3 ± 0.1 mm.

[0030] Preferably, the outer diameter of the screw platform 20 is 12.0 ± 0.1 mm, and the height of the screw platform 20 is 6.6 ± 0.1 mm.

[0031] Preferably, the outer diameter of the screw 30 is 7.79 to 7.96 mm, and the length of the screw 30 is 11.7 ± 0.2 mm.

[0032] Preferably, the outer diameter of the screw tail post 40 is 5.5 ± 0.1 mm. The height of the screw tail post 40 is approximately 3.3 mm.

[0033] Preferably, the anti-loosening mechanism is the glue coating layer 32. The glue coating layer 32 can be applied to the surface of the thread area 31 using blue thread glue (model ND593S), leaving 1 to 2 threads uncoated at the front and back of the thread area 31.

[0034] The screw structure of this solution can be appropriately adjusted according to the actual needs of specific products, and the above dimensions do not limit this solution.

[0035] As Figures 3 to 6 shown, a new type of automobile seat screw mold for manufacturing the above-mentioned new type of automobile seat screw includes a male mold 50 and a female mold 60. The male mold 50 includes a punch 51 fixedly connected to a punching machine base (not shown in the figure). The punch 51 includes a punch head 511, a punch body 512, and a punch tail 513. The punch 51 adopts a structure in which the outer diameters of the punch head 511, the punch body 512, and the punch tail 513 increase in sequence, which has the advantages of saving materials, maintaining mechanical strength, and concentrating the punching force on the punch head 511.

[0036] The female mold 60 includes a sleeve 61, a rear cover 62 provided at the rear end of the sleeve 61 and threadedly connected thereto, a mold top 63 provided in the sleeve 61 and the rear cover 62, and a female mold insert provided at the center of the front end of the sleeve 61. The front end of the female mold insert is flush with the front end face of the sleeve 61, and the rear end of the female mold insert abuts against the front end of the mold top 63.

[0037] Specifically, the female mold insert includes a frustum-shaped sleeve piece 64 with a small front end and a large rear end. The second half of the sleeve piece 64 is wrapped with a mold core 65. The first half of the sleeve piece 64 is wrapped with a first wire piece 66 that is hollow and penetrates through from front to back. The rear part of the first wire piece 66 is wrapped with a second wire piece 67. The rear end of the second wire piece 67 is flush with the rear end of the first wire piece 66 and simultaneously abuts against the front end of the mold core 65. The rear end of the mold core 65 is flush with the rear end of the sleeve piece 64 and simultaneously abuts against the front end of the mold top 63.

[0038] Specifically, the space between the front end face of the second wire piece 67 and the front end face of the first wire piece 66 matches the screw head 10. A first cylindrical cavity 670 that penetrates through from front to back is provided at the center of the second wire piece 67, and the first cylindrical cavity 670 matches the screw platform 20. A second cylindrical cavity 650 that penetrates through from front to back is provided at the center of the mold core 65, and the second cylindrical cavity 650 matches the screw 30 and the screw tail post 40.

[0039] Specifically, a notch 641 running through from front to back is provided on the lower side wall of the sleeve piece 64. A step 631 is provided in the middle of the die top 63. The step 631 abuts against the front end face of the rear cover 62. A thimble cavity 630 running through from front to back is provided at the center of the die top 63. A rear cavity 620 running through from front to back is provided at the center of the rear cover 62 for placing the rear part of the die top 63.

[0040] The screws in this solution are manufactured by cold heading and stamping process, which mainly includes: cold heading and blanking → first cold heading → third cold heading → fourth cold heading → turning (for machining the screw tail post 40) → cold heading and thread rolling (for machining the thread area 31) → electroplating → inspection → packaging, etc. The die in this solution is used in the fourth cold heading process during the manufacturing of the screws in this solution. The incoming material processed by the die in this solution is a preliminary blank (not shown in the figure) with the contour of a screw head, a screw table and a screw rod. After being stamped four times by the die in this solution, the outer shapes of the screw head 10, the internal hexagonal groove 11, the screw table 20 and the screw rod 30 are obtained (without threads and screw tail posts, and at this time the screw tail post is an extension of the screw rod 30). The glue layer 32 is processed after the electroplating process.

[0041] In summary, adopting the technical solution of the present utility model has the following beneficial effects:

[0042] In this solution, the screw adopts a screw head that is higher than that of a common screw, and a screw platform is provided between the screw head and the screw rod. A first-level step is formed at the joint between the screw head and the screw platform, a second-level step is formed at the joint between the screw platform and the screw rod, and a third-level step is formed at the joint between the screw rod and the screw tail post. This unique three-level step structure has the following advantages: The first step enables the screw head to pull the first locking member (such as: a seat, not shown in the figure) towards the second locking member (such as: a seat mounting base, not shown in the figure), and the screw head generates pressure on the first locking member. The second step enables the screw platform to disperse the screw fatigue, improve the mechanical strength and wear resistance, and further pull the first locking member towards the second locking member, and the screw platform generates pressure on the second locking member. The third step enables the thread to tightly lock the second locking member, and the screw tail post has the advantages of convenient installation and quick positioning (including quickly passing through the hole of the first locking member and quickly entering the hole of the second locking member), and improving the working efficiency of installing the screw. A loosening prevention mechanism is provided in the threaded area of the screw rod, effectively preventing the thread from loosening. The screw in this solution overcomes the problems that the mechanical strength, fatigue resistance, and wear resistance of common screws cannot withstand the tests of long time, long distance, bumpy roads, multiple sitting and rising of people on the seat, and swinging along with the vehicle, resulting in loosening, breakage, or damage to the seat. The mold in this solution adopts a structure in which a frustum-shaped sleeve piece wraps the mold core and the first wire piece, and the second wire piece is further wrapped in the first wire piece, forming a firm frustum-shaped female mold insert that has an interference fit with the frustum-shaped groove wall at the front end of the sleeve. It has the advantages of large wrapping force and will not loosen during stamping. Moreover, the structure of wrapping the second wire piece with the first wire piece can not only improve the mechanical strength of the female mold, but also facilitate the maintenance of the mold and the replacement of locally worn parts, reduce the maintenance cost, and at the same time has the advantage of being compatible with the manufacture of other specifications of screws and sharing this set of female molds.

[0043] The above-described embodiments do not constitute a limitation on the protection scope of the technical solution. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the above embodiments shall be included in the protection scope of the technical solution.

Claims

1. A new type of automobile seat screw, characterized in that: It includes a screw head, a screw platform connected to the rear end of the screw head, a screw rod connected to the rear end of the screw platform, and a screw tail post connected to the rear end of the screw rod. An internal hexagonal groove is provided at the center of the screw head. The height of the screw platform is at least twice the height of the screw head. The outer diameter of the screw platform is smaller than the outer diameter of the screw head. The outer diameter of the screw rod is smaller than the outer diameter of the screw platform. The outer diameter of the screw tail post is smaller than the outer diameter of the screw rod. The length of the screw rod is at least greater than the sum of the heights of the screw platform and the screw head. A loosening prevention mechanism is provided in the threaded area of the screw rod.

2. The novel automotive seat screw according to claim 1, wherein: The outer diameter of the screw head is 19.0 ± 0.3 mm, and the height of the screw head is 4.3 ± 0.1 mm.

3. The novel automotive seat screw according to claim 1, characterized in that: The outer diameter of the screw platform is 12.0 ± 0.1 mm, and the height of the screw platform is 6.6 ± 0.1 mm.

4. The novel automotive seat screw according to claim 1, characterized in that: The outer diameter of the screw rod is 7.79 - 7.96 mm, and the length of the screw rod is 11.7 ± 0.2 mm.

5. The novel automotive seat screw according to claim 1, characterized in that: The outer diameter of the screw tail post is 5.5 ± 0.1 mm.

6. The novel automotive seat screw according to claim 1, wherein: The loosening prevention mechanism is an adhesive layer.

7. A new type of automobile seat screw mold, used for manufacturing the new type of automobile seat screw described in any one of claims 1 to 6, characterized in that: It includes a male mold and a female mold. The male mold includes a punch fixedly connected to a punching machine base. The female mold includes a sleeve, a rear cover provided at the rear end of the sleeve and threadedly connected thereto, a mold top provided in the sleeve and the rear cover, and a female mold insert provided at the center of the front end of the sleeve. The front end of the female mold insert is flush with the front end face of the sleeve, and the rear end of the female mold insert abuts against the front end of the mold top.

8. The novel automobile seat screw mold according to claim 7, characterized in that: The female mold insert includes a frustum-shaped sleeve piece with a small front end and a large rear end. The rear half of the sleeve piece wraps a mold core, and the front half of the sleeve piece wraps a first wire piece that is hollow and penetrates through from front to back. The rear part of the first wire piece wraps a second wire piece. The rear end of the second wire piece is flush with the rear end of the first wire piece and simultaneously abuts against the front end of the mold core. The rear end of the mold core is flush with the rear end of the sleeve piece and simultaneously abuts against the front end of the mold top.

9. The novel automobile seat screw mold according to claim 8, wherein: The space between the front end face of the second wire piece and the front end face of the first wire piece matches the screw head. A first cylindrical cavity that penetrates through from front to back is provided at the center of the second wire piece, and the first cylindrical cavity matches the screw platform. A second cylindrical cavity that penetrates through from front to back is provided at the center of the mold core, and the second cylindrical cavity matches the screw rod and the screw tail post.

10. The novel automobile seat screw die according to claim 9, characterized in that: A notch that penetrates through from front to back is provided on the lower side wall of the sleeve piece. A step is provided in the middle of the mold top, and the step abuts against the front end face of the rear cover. A thimble cavity that penetrates through from front to back is provided at the center of the mold top.

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