Threaded connection structure of heavy-load connector

Abstract

The utility model provides a threaded connection structure of a heavy-load connector, which comprises a plastic shell and a special-shaped stud, and a mounting hole is arranged on the surface of the plastic shell. According to the utility model, the special-shaped stud provided with the internal threaded hole is arranged on the surface of the plastic shell, the special-shaped stud is pressed into the mounting hole through the rivet pressing mechanism, the barb part clamps the side wall of the mounting hole in the downward pressing process, the position of the special-shaped stud is fixed, and when a threaded piece is arranged in the later period, the special-shaped stud cannot rotate along with the threaded piece, so that the safety of the threaded piece is ensured. And the abrasion of the plastic shell is reduced.

Description

Technical Field

[0001] The utility model relates to a connection mechanism of a heavy-duty connector, in particular to a threaded connection structure of the heavy-duty connector. Background Art

[0002] Heavy-duty connectors are designed to withstand heavy loads and are primarily used for signal transmission in electrical, electronic, and communications equipment, as well as for high-load transmission in hybrid power and signal devices. Prior art heavy-duty connectors utilize plastic as the outer shell, which offers excellent insulation, is inexpensive, and effectively prevents electrical short circuits between connectors. The connection between the plastic shell and the metal connector typically involves creating a plastic hole in the surface of the plastic shell and manually embedding studs within the hole, significantly increasing molding time. Furthermore, repeated tightening of the screws in the plastic hole can damage the plastic, leading to instability in subsequent connections. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a threaded connection structure of a heavy-duty connector, which is characterized by comprising a plastic housing and a special-shaped stud, wherein the surface of the plastic housing is provided with a mounting hole for the special-shaped stud to extend into;

[0004] The special-shaped stud comprises a column with an overall cylindrical structure, and an internal threaded hole that is coaxially provided along the center of the column and docked with an external threaded member; the outer side surface of the special-shaped stud is provided with at least one group of barbs, and the barbs are interference-fitted with the mounting hole.

[0005] Furthermore, the barb portion is a bulge provided on the outer surface of the special-shaped stud, the bulge is integrally formed with the column, and the lower surface of the bulge is an inclined surface extending from bottom to top.

[0006] Furthermore, the barbs are in groups and arranged around the outside of the special-shaped stud.

[0007] Furthermore, each group of barbs includes a plurality of protrusions arranged along the central axis of the column.

[0008] Furthermore, the mounting hole includes a central circular hole and a notch groove extending outward along the hole wall of the central circular hole. The notch groove is arranged at a position corresponding to the barb portion and extends the upper end face of the mounting hole along the axial direction of the central circular hole. The barb portion is interference fit in the notch groove.

[0009] Furthermore, the radial dimension of the column is smaller than the radial dimension of the mounting hole, and the column of the special-shaped stud is loosely matched with the mounting hole.

[0010] Furthermore, a relief hole extends from the bottom of the mounting hole, and the relief hole is communicated with the internal threaded hole.

[0011] Furthermore, an internal buried hole communicating with the internal threaded hole is provided at the upper end of the special-shaped stud, and the internal buried hole is coaxially arranged with the internal threaded hole.

[0012] The utility model provides a threaded connection structure for a heavy-duty connector, comprising a plastic housing and a special-shaped stud, wherein the surface of the plastic housing is provided with a mounting hole. The utility model installs a special-shaped stud with an internally threaded hole into the surface of the plastic housing. The special-shaped stud is pressed into the mounting hole by a pressure riveting mechanism. During the downward pressing process, the barbs engage the side wall of the mounting hole, securing the position of the special-shaped stud. When a threaded component is subsequently installed, the special-shaped stud does not rotate with the threaded component, thereby reducing wear on the plastic housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of a threaded connection structure of a heavy-duty connector of the present invention;

[0014] Figure 2 It is a structural diagram of a special-shaped stud;

[0015] Figure 3 It is the main view of the special-shaped stud;

[0016] Figure 4 This is a top view of the plastic housing mounting hole locations;

[0017] Figure 5 This is a top view of the special-shaped stud after it is installed in the mounting hole.

[0018] Reference numerals: special-shaped stud 1, column 11, barbed portion 12, inclined surface 13, internal threaded hole 14, internal buried hole 15, plastic housing 2, mounting hole 3, central circular hole 31, notched groove 32, avoidance hole 4. DETAILED DESCRIPTION

[0019] like Figure 1 The threaded connection structure of a heavy-duty connector shown in the figure comprises a plastic housing 2 and a special-shaped stud 1. The surface of the plastic housing 2 is provided with a mounting hole 3 for the special-shaped stud 1 to extend into. The special-shaped stud 1 comprises a cylindrical body 11, with an internally threaded hole 14 coaxially arranged along the center of the body 11 for docking with an external threaded member. The outer surface of the special-shaped stud 1 is provided with at least one set of barbs 12, which form an interference fit within the mounting hole 3. When the special-shaped stud 1 is pressed downward, the barbs 12 continuously press against the wall of the mounting hole 3, securing the special-shaped stud 1 in place.

[0020] like Figure 2 and Figure 3As shown, the barb portion 12 in the embodiment is a protrusion provided on the outer surface of the special-shaped stud 1, the protrusion is integrally formed with the column 11, and the lower surface of the protrusion is an inclined surface 13 extending from bottom to top. The special-shaped stud 1 applies gradually increasing pressure to the hole wall of the mounting hole 3 during the riveting process, ensuring the smoothness of the downward pressing of the special-shaped stud 1, while avoiding the instantaneous contact between the barb portion 12 and the hole wall of the mounting hole 3, which would apply excessive pressure to the mounting hole 3 and cause damage to the plastic shell 2.

[0021] In the embodiment, four groups of barbs 12 are arranged around the outside of the special-shaped stud 1. The four groups of barbs 12 apply pressure simultaneously to ensure that the center of force of the entire barb 12 is located in the middle of the special-shaped stud 1, thereby avoiding excessive pressure on one side of the mounting hole 3, which causes the special-shaped stud 1 to be offset in the vertical direction when pressed down.

[0022] Furthermore, each group of barbs 12 includes three protrusions arranged along the central axis of the column 11. The three protrusions are arranged up and down to try to keep the pressure evenly distributed in the axial direction, thereby increasing the adhesion between the special-shaped stud 1 and the mounting hole 3.

[0023] Furthermore, the mounting hole 3 includes a central circular hole 31 and a notch groove 32 extending outward along the hole wall of the central circular hole 31. The notch groove 32 is arranged corresponding to the position of the barb portion 12 and extends out of the upper end face of the mounting hole 3 along the axial direction of the central circular hole 31. The barb portion 12 is interference-fitted into the notch groove 32. After the barb portion 12 is inserted into the notch groove 32, the notch groove 32 can block the side wall of the barb portion 12, limiting the circumferential rotation of the special-shaped stud 1 in the notch groove 32. The special-shaped stud 1 maintains its position when the metal shell is assembled later, preventing the special-shaped stud 1 from rotating with the threaded connection. In addition, the notch groove 32 and the central circular hole 31 form a special-shaped structure that is easy to position, allowing the external automatic riveting gripper to quickly visually identify the installation position of the special-shaped stud 1.

[0024] Furthermore, the radial dimension of the column 11 is smaller than the radial dimension of the mounting hole 3, and the column 11 of the special-shaped stud 1 is loosely matched with the mounting hole 3. When pressed down, only the barb portion 12 contacts the inner wall of the mounting hole 3, thereby avoiding deformation and cracking of the inner wall of the mounting hole 3.

[0025] Furthermore, a relief hole 4 extends from the bottom of the mounting hole 3. This relief hole 4 communicates with the internally threaded hole 14. The radial dimension of the relief hole 4 is larger than that of the column 11 and smaller than that of the mounting hole 3. The bottom end surface of the mounting hole 3 serves as the lower limit for mounting the special-shaped stud. The relief hole 4 provides an installation margin for external threaded connectors. For some overly long threaded connectors, the relief hole 4 can extend from the bottom of the special-shaped stud 1 into the relief hole 4 during installation, maintaining a stable connection between the special-shaped stud 1 and the threaded connector.

[0026] Furthermore, the upper end of the special-shaped stud 1 is provided with an internal buried hole 15 connected to the internal threaded hole 14. The internal buried hole 15 is coaxially arranged with the internal threaded hole 14. After the external threaded connector is installed, the cap of the threaded connector will be hidden in the internal buried hole 15.

[0027] Combine Figure 4 and Figure 5 The process of assembling the connector using this embodiment is as follows: a plastic shell 2 is formed with a mounting hole 3 on its surface, an external automatic riveting gripper picks up the special-shaped stud 1, visually locates the mounting position of the special-shaped stud 1, and places the bottom of the special-shaped stud 1 into the mounting hole 3; the riveting machine starts to apply a downward riveting force from the top of the special-shaped stud 1, and the special-shaped stud 1 moves downward along the mounting hole 3 under the action of pressure until the lower surface of the special-shaped stud 1 is blocked by the bottom plane of the mounting hole 3. During the movement of the special-shaped stud 1, the barb 12 constantly rubs against the wall of the mounting hole 3, increasing the adhesion between the special-shaped stud 1 and the mounting hole 3, and the special-shaped stud 1 is fixed in the mounting hole 3. At this time, the screw of the external shell is installed in the threaded hole of the special-shaped stud 1, and the plastic shell 2 and the external shell can be stably connected as a whole.

[0028] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. The threaded connection structure of the heavy-duty connector is characterized by: It comprises a plastic shell (2) and a special-shaped stud (1), wherein the surface of the plastic shell (2) is provided with a mounting hole (3) for the special-shaped stud (1) to extend into; The special-shaped stud (1) comprises a column (11) with an overall cylindrical structure, and an internal threaded hole (14) is coaxially provided along the center of the column (11) and is connected to an external threaded part; the outer side surface of the special-shaped stud (1) is provided with at least one group of barbs (12), and the barbs (12) are interference-fitted with the mounting hole (3).

2. The threaded connection structure of the heavy-duty connector according to claim 1, wherein: The barb portion (12) is a convex block provided on the outer surface of the special-shaped stud (1); the convex block and the column (11) are integrally formed; and the lower surface of the convex block is an inclined surface (13) extending from bottom to top.

3. The threaded connection structure of the heavy-duty connector according to claim 2, wherein: The barbed parts (12) are in multiple groups and are arranged around the outside of the special-shaped stud (1).

4. The threaded connection structure of the heavy-duty connector according to claim 2, wherein: Each group of barbs (12) comprises a plurality of protrusions arranged along the central axis of the column (11).

5. The threaded connection structure of the heavy-duty connector according to claim 2, wherein: The mounting hole (3) comprises a central circular hole (31) and a notch groove (32) extending outwardly along the hole wall of the central circular hole (31); the notch groove (32) is arranged corresponding to the position of the barb portion (12) and extends out of the upper end surface of the mounting hole (3) along the axial direction of the central circular hole (31); the barb portion (12) is interference-fitted into the notch groove (32).

6. The threaded connection structure of the heavy-duty connector according to claim 2, wherein: The radial dimension of the column (11) is smaller than the radial dimension of the mounting hole (3), and the column (11) of the special-shaped stud (1) is clearance-matched with the mounting hole (3).

7. The threaded connection structure of the heavy-duty connector according to claim 6, wherein: A relief hole (4) extends from the bottom of the mounting hole (3), and the relief hole (4) is communicated with the internal threaded hole (14).

8. The threaded connection structure of the heavy-duty connector according to claim 6, wherein: The upper end of the special-shaped stud (1) is provided with an internally buried hole (15) communicating with the internally threaded hole (14), and the internally buried hole (15) is coaxially arranged with the internally threaded hole (14).

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