CN217301185U

CN217301185U - Embedded double-screw bolt of die-casting and corresponding mould

Info

Publication number: CN217301185U
Application number: CN202123085444.4U
Authority: CN
Inventors: 徐晓虎; 张少华
Original assignee: Weihai Taiheng Motor Co ltd
Current assignee: Weihai Taiheng Motor Co ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-08-26
Anticipated expiration: 2031-12-09

Abstract

The utility model relates to a die-casting technical field, specifically a die-casting embedded double-screw bolt and corresponding mould, the double-screw bolt includes the column cap that brass material, thickness are 1mm, the upper surface center of column cap upwards extends and forms first cylinder, first cylinder upwards extends and forms rather than concentric second cylinder, the second cylinder includes high screw thread section and light section, the screw thread on the screw thread section is M6 coarse thread ordinary screw thread; the mould is provided with a blind hole corresponding to the diameter of the first cylinder, the depth of the blind hole is smaller than the distance between the upper end surface of the second cylinder and the upper end surface of the column head, and the free end of the second cylinder is inserted into the blind hole in the mould. Compared with the prior art, the utility model discloses the double-screw bolt can be embedded in the mould, does not have narrow and small department, and the gas pocket that reduces aluminum alloy die-casting produces, improves the product production qualification rate.

Description

Embedded double-screw bolt of die-casting and corresponding mould

Technical Field

The utility model relates to a die-casting technical field specifically is an embedded double-screw bolt of die-casting and corresponding mould.

Background

An aluminum alloy box for mounting an immersed electrical component in liquid requires thin walls, dense part structure, rust prevention, no permission of pressure resistance and leakage, no permission of casting defects, and also requires a connecting stud with a smaller specification. If the connecting stud is manufactured by die casting in the existing die casting process, the connecting stud is easy to break due to the material.

Disclosure of Invention

In order to improve the product production qualification rate, reduce the processing degree of difficulty, the utility model discloses an embedded double-screw bolt of die-casting and corresponding mould, the technical scheme who takes is:

the stud comprises a brass stud head, the center of the upper surface of the stud head extends upwards to form a first cylinder, the first cylinder extends upwards to form a second cylinder concentric with the first cylinder, the second cylinder comprises a high-degree threaded section and a smooth section, and threads on the threaded section are M6 coarse common threads; the mould is provided with a blind hole corresponding to the diameter of the first cylinder, the depth of the blind hole is smaller than the distance between the upper end surface of the second cylinder and the upper end surface of the column head, and the free end of the second cylinder is inserted into the blind hole in the mould.

Further, the diameter of the first cylinder is 6.8mm, and the height is 8 mm; the diameter of the second cylinder is 6.0mm, and the tolerance is 0 to-0.022; the tolerance of the blind hole is + 0.02- + 0.038.

Furthermore, the cross section of the column cap is drum-shaped, and comprises two arcs with the diameter larger than that of the first cylinder and two parallel straight lines tangent to the circumferential excircle of the first cylinder.

Further, the height of the second cylinder is 16mm, and the thickness of the column head is 1 mm.

Further, the radius of the arc is 5 mm.

Compared with the prior art, the utility model discloses the double-screw bolt can be embedded in the mould, does not have narrow and small department, and the gas pocket that reduces aluminum alloy die-casting produces, improves the product production qualification rate. The brass material has high strength, is easy to process, and is not easy to rust and break. A step is arranged between the two cylinders, and two planes are arranged on the cylinder heads and can prevent torsion and pull-off. The fit clearance between the brass stud and the die is small, no flash and burr are generated, and the processing surface is reduced.

Drawings

Fig. 1 is a schematic view of a stud structure of the present invention.

Fig. 2 is a top view of fig. 1.

Detailed Description

In the description of the present invention, it is to be understood that the terms "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplified description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation. The terms "first", "second", etc. are used merely to distinguish different components and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; unless the movable connection is explicitly defined as a detachable connection. These connections are conventional in the art, and those skilled in the art will understand the specific meaning of the above terms in the present invention according to the specific situation.

As shown in the figure, the die-cast embedded stud and the corresponding die thereof are provided, the stud comprises a stud head 1 which is made of brass and has a thickness of 1mm, the center of the upper surface of the stud head 1 extends upwards to form a first cylinder 2, the first cylinder 2 extends upwards to form a second cylinder 3 which is concentric with the first cylinder, the second cylinder 3 comprises a high-threaded section 31 and a smooth section 32, and the thread on the threaded section 31 is an M6 coarse common thread; a blind hole corresponding to the diameter of the first cylinder 2 is formed in the die, the depth of the blind hole is smaller than the distance between the upper end face of the second cylinder 3 and the upper end face of the column cap 1, and the free end of the second cylinder 3 is inserted into the blind hole in the die. Diameter of the first cylinder 2

6.8mm and a height h of 8 mm; the diameter M of the second cylinder 3 is 6.0mm, and the tolerance is 0 to-0.022; the tolerance of the blind hole is + 0.02- + 0.038. The height of the second cylinder 3 is 16mm, the external profile shape of the column cap 1 is drum-shaped, and comprises two arc lines 11 with the diameter larger than that of the first cylinder 2,two parallel straight lines 12 tangential to the outer circumference of the first cylinder 2. The radius of the arc 11 is 5 mm.

The above description is only a preferred embodiment of the present invention, and not all embodiments, and all modifications and improvements based on the above description are intended to fall within the scope of the present invention.

Claims

1. The die-casting embedded stud and the corresponding die are characterized in that the stud comprises a stud head (1) made of brass, the center of the upper surface of the stud head (1) extends upwards to form a first cylinder (2), the first cylinder (2) extends upwards to form a second cylinder (3) concentric with the first cylinder, the second cylinder (3) comprises a high-threaded section (31) and a smooth section (32), and threads on the threaded section (31) are M6 coarse common threads; a blind hole corresponding to the diameter of the first cylinder (2) is formed in the die, the depth of the blind hole is smaller than the distance between the upper end face of the second cylinder (3) and the upper end face of the column head (1), and the free end of the second cylinder (3) is inserted into the blind hole in the die.

2. Die-cast stud and corresponding die according to claim 1, characterised in that the diameter of the first cylinder (2)

6.8mm, height (h) 8 mm; the diameter (M) of the second cylinder (3) is 6.0mm, and the tolerance is 0 to-0.022; the tolerance of the blind hole is + 0.02- + 0.038.

3. The die-cast stud and corresponding die as claimed in claim 1, characterized in that the height of the second cylinder (3) is 16mm and the thickness of the stud head (1) is 1 mm.

4. The die-cast embedded stud and the corresponding die as claimed in claim 1, characterized in that the outer contour of the stud head (1) is drum-shaped and comprises two arcs (11) with a diameter larger than that of the first cylinder (2) and two parallel straight lines (12) tangential to the outer circumference of the first cylinder (2).

5. The die-cast stud and corresponding die as claimed in claim 4, characterized in that the radius of the arc (11) is 5 mm.