CN220021633U

CN220021633U - Integrally formed nut terminal

Info

Publication number: CN220021633U
Application number: CN202321613925.4U
Authority: CN
Inventors: 辛增贵
Original assignee: Dongguan Ganfeng Electric Co ltd
Current assignee: Dongguan Ganfeng Electric Co ltd
Priority date: 2023-06-25
Filing date: 2023-06-25
Publication date: 2023-11-14
Anticipated expiration: 2033-06-25

Abstract

The utility model relates to the technical field of connectors, in particular to an integrally formed nut terminal which comprises a nut end, a wiring end and a transmission section fixedly connected between the nut end and the wiring end, wherein the transmission section is integrally formed between the nut end and the wiring end, the nut end, the wiring end and the transmission section are integrally formed by conductive metal pipes, the pipe wall of the conductive metal pipe of the transmission section is extruded to form a tightly attached flat integrally formed structure, and the central axis of the nut end and the central axis of the wiring end are approximately in a vertical intersecting state. Finally, an integrally formed nut terminal can be provided, so that the two ends of the nut terminal are better fixedly connected, transmission resistance is reduced, high-current transmission safety is improved, the nut terminal is more firmly connected with an external injection molding shell, and production and use of a nut terminal finished product are facilitated.

Description

Integrally formed nut terminal

Technical Field

The utility model relates to the technical field of connectors, in particular to an integrally formed nut terminal.

Background

The CONNECTOR is CONNECTOR. Also known in the country as connectors, plugs and sockets. Generally referred to as an electrical connector. The connector is used for enabling current to flow between blocked or isolated circuits in the circuit so as to enable the circuit to achieve a preset function. The form and structure of the connector are varied, and there are various different forms of connectors according to the application object, frequency, power, application environment, and the like.

Terminals refer to a component of a connection circuit, also a connector, which is commonly used in electronic circuits and electrical equipment. Signals or power in the circuit may be connected to other circuits or devices through terminal fittings to transmit power energy, communication signals or control signals in the circuit. Terminals are typically composed of two parts, a conductor part which may be used for connection of a connector plug or cable, and an insulator for isolating the conductor.

Particularly, when the power connection and transmission are realized between the PCB and the cable, the connection is required to be convenient and fast, the connection is stable, and the high current and the like can safely pass through, so that higher requirements are provided for connecting the PCB with the connecting terminal between the external cable.

The existing connecting nut terminal is usually a section of metal sheet sealed inside insulating plastic, one end of the existing connecting nut terminal is provided with a bolt terminal, and the existing connecting nut terminal is connected with an external bolt by utilizing threads so as to transmit electric power; and the other end adopts a crimp terminal, and the wire is crimped by using a plastic metal material such as aluminum, copper, or the like. Due to the limitations of the conventional process, it is generally necessary to separately produce a bolt-type terminal and a crimp-type terminal and then fixedly connect the two parts using other connection means.

Chinese patent document publication No. CN209804937U discloses a transit screw terminal for introducing a large current of a conductive lead into a PCB board, which includes a connection conductive terminal and a large current transit nut; the wiring conductive terminal consists of a wire pressing hole, a positioning hole and a riveting hole; the adapter nut is composed of a fixed nut, a riveting tail part and a positioning claw; the high-current transfer nut is connected with the conductive terminal through riveting and is vertically transferred and matched.

As described in the above patent document, although it uses a high-current transit nut so as to facilitate the transmission of a high current, it adopts a rivet-press link between the nut and the conductive terminal, and because of the existence of a contact resistance, particularly in the case that a gap or the like occurs in a rivet-press portion, the resistance thereof is liable to rise abnormally, which results in the abnormal temperature rise of the rivet-press portion when a high current is transmitted, which affects the normal use of the apparatus and reduces the safety of the apparatus.

Therefore, how to make the two ends of the nut terminal better fixed connection, thereby reducing the transmission resistance, improving the transmission safety of large current, and making the connection between the nut terminal and the external injection molding shell more stable is a technical problem to be solved.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a technical scheme capable of solving the problems.

The utility model provides an integrally formed nut terminal which comprises a nut end, a wiring end and a transmission section fixedly connected between the nut end and the wiring end, wherein the transmission section is integrally formed between the nut end and the wiring end, the nut end, the wiring end and the transmission section are integrally formed by conductive metal pipes, and the pipe walls of the conductive metal pipes of the transmission section are extruded to form a tightly-attached flat integrally formed structure.

As a further scheme of the utility model: the central axis of the nut end and the central axis of the terminal are in a vertical intersecting state.

As a further scheme of the utility model: the plane formed by the flat transmission section is approximately perpendicular to the central axis of the nut end and parallel to the central axis of the terminal.

As a further scheme of the utility model: the nut end is provided with a nut hole and a nut side wall, the nut side wall surrounds the nut hole to form an annular structure, threads are formed on the nut side wall on the periphery of the nut hole, and the threads are used for locking bolts on an external device.

As a further scheme of the utility model: the thickness of the transmission section is smaller than or equal to the thickness of the side wall of the nut.

As a further scheme of the utility model: the wiring terminal is provided with joint hole and wiring lateral wall, the wiring lateral wall encircles in the outside of joint hole and forms annular structure, the joint hole extends certain distance from the wiring terminal to the transmission end and forms the counter bore.

As a further scheme of the utility model: the thickness of the transmission section is greater than the thickness of the wiring side wall.

As a further scheme of the utility model: the plane formed by intersecting the central axes of the nut end and the wiring terminal is set as a central plane, and side planes parallel to the central plane are formed on the outer sides of the side walls of the nut positioned on two sides of the central plane and are used for abutting against the external injection molding shell, so that the nut terminal is firmly nested in the external injection molding shell; the width of the transmission section is equal to or smaller than the distance between the two side planes.

As a further scheme of the utility model: the transmission section is provided with spacing hole, thereby spacing hole runs through thereby the transmission section forms the through-hole, spacing hole is used for the buckle to connect on the outside casing of moulding plastics to carry out spacing fixed to the nut terminal.

As a further scheme of the utility model: the transmission section is also provided with a bending slope and a bending convex surface, the bending slope is positioned at the joint of the transmission section and the wiring terminal, and the bending slope is provided with a slope structure with a certain bending amplitude; the bending convex surface is positioned at the joint of the nut end and the transmission section and is of a convex surface structure with a certain bending amplitude.

Compared with the prior art, the utility model has the beneficial effects that:

1. the conductive metal tube is manufactured through an integral forming process, so that the nut end, the wiring end and the transmission section can form an integral forming structure, contact resistance among components is reduced, and stability and safety of high-current transmission are improved.

2. The nut end and the wiring terminal are arranged to be approximately vertical, so that the connection between the external cable and the external PCB can form bent connection, and the phenomenon that the external cable is unnecessarily bent in connection to influence the transmission of large current is avoided.

3. In order to further improve the efficiency of the transmission section in transmitting a large current, the thickness of the flat transmission section is set to be smaller than or equal to the thickness of the nut side wall and larger than the thickness of the wire side wall.

4. In order to avoid the transmission section from generating cracks or sections during bending, the transmission section is better fixedly connected with the nut end and the wiring end by arranging a bending slope and a bending convex surface.

Therefore, through the improvement, the nut terminal can be provided with the integrally formed nut terminal, so that the two ends of the nut terminal are better fixedly connected, the transmission resistance is reduced, the transmission safety of high current is improved, the nut terminal is more firmly connected with the external injection molding shell, and the nut terminal is convenient to produce and use.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of the structure of the nut end of the present utility model;

FIG. 2 is a schematic diagram of the structure of the transfer section of the present utility model;

fig. 3 is a schematic structural view of the terminal of the present utility model;

FIG. 4 is a schematic cross-sectional view of the present utility model;

FIG. 5 is a schematic view of the structure of the center plane of the present utility model;

FIG. 6 is a schematic view of the structure of the folding ramp of the present utility model;

FIG. 7 is a schematic view of a curved convex surface according to the present utility model;

FIG. 8 is a schematic structural view of a conductive metal tube of the present utility model;

FIG. 9 is a schematic view of another angle of the conductive metal tube of the present utility model;

fig. 10 is a schematic cross-sectional view of a conductive metal tube of the present utility model.

Reference numerals and names in the drawings are as follows:

10 nut ends; 11 nut holes; 12 nut side walls; 13 threads; a 14 center plane; 15 side plane; 16 a first central axis; 20 terminals; 21 clamping holes; 22 wiring sidewalls; 23 insertion bevel; 24 a second central axis; 30 transmission sections; 31 limit holes; 32 bending the slope; 33 are convex.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 10, in an embodiment of the present utility model, an integrally formed nut terminal includes a nut end 10, a terminal 20, and a transmission section 30 fixedly connected between the nut end 10 and the terminal 20, wherein the transmission section 30 is integrally formed between the nut end 10 and the terminal 20, the nut end 10, the terminal 20 and the transmission section 30 are integrally formed by conductive metal tubes, wherein the tube walls of the conductive metal tubes of the transmission section 30 are extruded to form a tightly-adhered flat integrally formed structure.

Specifically, the terminal is generally composed of two parts, namely a conductor and an insulator, wherein the conductor part can be used for connecting an external electric connection bolt or an external cable, and the insulator is used for isolating the conductor, so that the use safety is improved. In the specific manufacturing process, due to the limitation of the conventional process, it is generally required to separately produce a bolt-type terminal and a crimp-type terminal, and then fixedly connect the two parts by using other connection methods, such as riveting. The bolt type terminal is connected with an external bolt by utilizing the threads 13 to transmit power, and the bolt type connection can be used for rapidly and conveniently realizing connection or disconnection of a circuit, and has the advantages of long service life, firm installation and convenient replacement and disassembly. The crimp terminal utilizes plastic metal materials such as aluminum, copper and the like to crimp the electric wire, and has the advantages of compaction, firmness, reliability and the like due to the crimp connection mode, and has the characteristics of tight connection, small on-resistance, reliable contact and the like, so that the crimp terminal is widely applied to the fields of electronics, communication, power distribution, automation and the like.

However, when the bolt terminal and the crimp terminal are connected by crimping, the screw is not tightly pressed or a gap is formed by the crimping, so that the contact resistance is increased, the abnormal temperature rise occurs when a large current is transmitted, the service life of the nut terminal is affected, and the safety of equipment connection is reduced. Therefore, the utility model provides an integrally formed nut terminal, which is formed by integrally forming and stamping a conductive metal tube, so that the integrated nut terminal 10, the transmission section 30 and the wiring terminal 20 are respectively formed, the large current can pass more smoothly, the abnormal temperature rise of the nut terminal is avoided, the service life of the nut terminal is prolonged, and the safety of equipment connection is improved.

Second, the conductive metal tube is preferably a red copper metal tube because red copper has better performance through a large current.

As shown in fig. 1 to 5, it is preferable that the central axis of the nut end 10 is substantially perpendicular to the central axis of the terminal 20. The flat transmission section 30 forms a plane perpendicular to the central axis of the nut end 10 and parallel to the central axis of the terminal 20.

Specifically, the central axis of the nut end 10 is set as a first central axis 16, and the central axis of the terminal 20 is set as a second central axis 24, wherein the first central axis 16 and the second central axis 24 are in a substantially perpendicular state with each other. That is, when the nut end 10 is press-bent on the external punching device, it will be understood that it is generally necessary to perform a preliminary bending at first so that the bending angle between the nut end 10 and the terminal 20 is substantially less than 145 degrees, and then to perform bending again so that the bending angle reaches a desired angle. The bending angle is typically set to about 90 degrees so that the nut end 10 is generally perpendicular to the axis of the terminal 20. Of course, in order to better make the connection between the bolt on the external PCB and the external cable more stable, it is convenient to pass a large current, so the bending angle can be set to other angles, such as 85 degrees, or 95 degrees, even 120 degrees, etc. Corresponding settings can be made according to the angle of the cable connection. Further, to facilitate use of the nut terminal, it is preferable that the flat-shaped transmission section 30 is disposed substantially parallel to the terminal 20.

As shown in fig. 1, 4 and 6, the nut end 10 is preferably provided with a nut hole 11 and a nut side wall 12, the nut side wall 12 forms a ring structure around the nut hole 11, the nut side wall 12 of the nut hole 11 is provided with threads 13, and the threads 13 are used for locking a bolt on an external device. The plane formed by intersecting the central axes of the nut end 10 and the terminal 20 is set as a central plane 14, and side planes 15 parallel to the central plane 14 are formed on the outer sides of the nut side walls 12 positioned on two sides of the central plane 14, and the side planes 15 are used for abutting against an external injection molding shell so that the nut terminal is firmly nested in the external injection molding shell; the width of the transport section 30 is equal to or smaller than the distance between the two side planes 15. The thickness of the transfer section 30 is less than or equal to the thickness of the nut sidewall 12.

Specifically, the screw thread is used for connecting through the screw thread the bolt on the external device to convenient and fast dismantles and connects. In order to make the nut terminal firmly engaged with the external mold during injection molding, and to avoid the occurrence of jumping, rotation, and the like, it is preferable to provide a flat surface at the position of the side flat surface 15 of the nut side wall 12. The side surface 15 can be snapped onto the side of the mold when the nut terminal is placed on the outer mold, thereby preventing the nut terminal from rotating. In addition, in order to avoid the transmission section 30 being pressed too thin to lose the supporting force and also to avoid reducing the ability to transmit a large current, it is also possible to arrange that the width of the transmission section 30 is equal to or smaller than the distance between the side planes 15 of the nut end 10. And the width of the transmission section 30 is not greater than the distance between the side planes 15 of the nut end 10, so that the volume of the injection molding shell can not be increased in the subsequent injection molding process, the size of a finished nut terminal product can not be increased, and the defect that the finished nut terminal product is oversized and inconvenient to use is avoided.

Likewise, to avoid the transfer section 30 being too thick and not wide enough, the thickness of the transfer section 30 may also be set to be less than or equal to the thickness of the nut sidewall 12. As shown in fig. 7 to 10, the nut end 10 is formed by forging a cold block on the basis of a conductive metal pipe, so that the size of the nut end 10 is increased, and the nut side wall 12 is thickened, thereby facilitating the subsequent extrusion and bending of the nut end 10 and the terminal 20.

As shown in fig. 6 and 7, preferably, the transmission section 30 is provided with a limiting hole 31, the limiting hole 31 penetrates through the transmission section 30 to form a through hole, and the limiting hole 31 is used for being connected to an external injection molding shell in a snap-fit manner, so that the nut terminal is limited and fixed.

Specifically, the limiting hole 31 is preferably a square hole. Thereby utilizing the stabilizing effect of the vertical side edge of the square hole to limit. It will be appreciated that corresponding square projections should also be provided on the outer injection molded housing, or on the mold, so as to pass through the through holes and cooperate with the limiting holes 31 to form a limiting action.

As shown in fig. 3 and 5, the terminal 20 is preferably provided with a clamping hole 21 and a wiring side wall 22, the wiring side wall 22 surrounds the clamping hole 21 to form an annular structure, and the clamping hole 21 extends from the terminal 20 to the transmission end to form a counter bore.

Specifically, when an external cable is connected to the terminal 20, it is generally necessary to insert one end of the cable into the clamping hole 21, and then press the wire side wall 22 to deform the wire side wall 22 in a metallic manner, thereby firmly crimping the cable to the terminal 20. In addition, in order to facilitate the insertion of the external cable, an insertion inclined plane 23 may be provided at the front end of the clamping hole 21, so that the clamping hole 21 forms an opening with a large front and a small rear, thereby facilitating the insertion of the cable.

In addition, in order to facilitate passing large current, the transmission section 30 is further provided with a bending slope 32 and a bending convex surface 33, the bending slope 32 is located at the connection position of the transmission section 30 and the terminal 20, and the bending slope 32 is preferably a slope structure with a certain bending amplitude, so that the outer wall of the terminal 20 forms continuous bending transition to the transmission section 30, and the outer wall of the bending slope 32 is prevented from being damaged, so that unstable current transmission and abnormal temperature rise are caused. Likewise, the bending convex surface 33 is located at the connection between the nut end 10 and the transmission section 30, and the bending convex surface 33 is preferably a convex surface structure with a certain bending amplitude, so that the outer wall of the terminal 20 forms a continuous convex bending transition towards the transmission section 30, and the outer wall of the bending convex surface 33 is prevented from being damaged, thereby causing unstable current transmission and abnormal temperature rise.

In addition, when the conductive metal tube is extruded and bent, in order to prevent the deformation of the nut hole 11 of the nut end 10 and the clamping hole 21 of the terminal 20, a rigid force-receiving member may be disposed in the corresponding nut hole 11 and clamping hole 21, so as to avoid the deformation of the side walls of the nut hole 11 and clamping hole 21. It can be appreciated that the threads 13 on the nut end 10 are preferably manufactured after the nut end is extruded and bent, so as to avoid the threads 13 being damaged when the threads 13 are extruded and bent.

During specific production, the metal conductive tube is cut into a tube with a preset length, then the cylindrical inner wall of the nut end 10 is forged, the nut hole 11 and the nut side wall 12 are manufactured, the nut side wall 12 is changed into a thicker and tightly attached flat structure, then the cylindrical inner wall of the terminal 20 is forged, the clamping hole 21 is manufactured, and in the manufacturing process of the clamping hole 21, the inner wall of the outlet of the clamping hole 21 can be forged with an insertion inclined plane 23, so that an external cable is conveniently inserted into the clamping hole 21.

The pipe member after the nut hole 11 and the snap hole 21 are formed is then placed on a press machine to be forged. Namely, the nut end 10 is extruded and bent toward the terminal 20, so that a bending shape with a certain bending angle is formed between the nut end 10 and the terminal 20. The forging of the limiting hole 31 may be performed at the same time as the extrusion bending.

After forging, corresponding threads 13 are manufactured in the nut hole 11, so that the connection of external bolts is facilitated, and other manufacturing processes, such as a later injection molding process, can be performed, so that the outside of the metal conductive pipe fitting is wrapped with an insulating plastic part, and the use of a user is facilitated.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model 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.

Claims

1. The utility model provides an integrated into one piece's nut terminal, its characterized in that includes nut end (10), wiring end (20) and fixed connection transmission section (30) between nut end (10) and wiring end (20), transmission section (30) integrated into one piece is between nut end (10) and wiring end (20), nut end (10), wiring end (20) and transmission section (30) are formed by conductive metal pipe integrated into one piece, and wherein the pipe wall of conductive metal pipe of transmission section (30) is extruded and is formed the platykurtic integrated into one piece structure of closely laminating.

2. An integrally formed nut terminal as claimed in claim 1, wherein the central axis of the nut end (10) is substantially perpendicular to the central axis of the terminal (20).

3. An integrally formed nut terminal according to claim 1, characterized in that the flat transmission section (30) forms a plane substantially perpendicular to the central axis of the nut end (10) and parallel to the central axis of the terminal (20).

4. An integrally formed nut terminal according to claim 1, characterized in that the nut end (10) is provided with a nut hole (11) and a nut side wall (12), the nut side wall (12) forms a ring-like structure around the nut hole (11), the nut side wall (12) in the circumferential direction of the nut hole (11) is provided with threads (13), and the threads (13) are used for locking a bolt on an external device.

5. The integrally formed nut terminal according to claim 4, wherein the thickness of the transmission section (30) is less than or equal to the thickness of the nut sidewall (12).

6. The integrally formed nut terminal according to claim 4, wherein the terminal (20) is provided with a clamping hole (21) and a wiring side wall (22), the wiring side wall (22) is formed in an annular structure around the outer side of the clamping hole (21), and the clamping hole (21) extends from the terminal (20) to the transmission end for a certain distance to form a counter bore.

7. The one-piece nut terminal of claim 6, characterized in that the thickness of said transmission section (30) is greater than the thickness of said wire side wall (22).

8. The integrally formed nut terminal according to claim 4, characterized in that the plane formed by the intersection of the central axes of the nut end (10) and the terminal (20) is provided as a central plane (14), the outer sides of the nut side walls (12) on both sides of the central plane (14) are formed with side planes (15) parallel to the central plane (14), and the side planes (15) are used for abutting against the external injection-molded housing, so that the nut terminal is firmly nested in the external injection-molded housing; the width of the transport section (30) is equal to or smaller than the distance between the two side planes (15).

9. An integrally formed nut terminal according to claim 1, characterized in that the transmission section (30) is provided with a limiting hole (31), the limiting hole (31) penetrating the transmission section (30) to form a through hole, the limiting hole (31) being for snap-connection to an external injection molded housing to limit the fixation of the nut terminal.

10. The integrally formed nut terminal according to claim 1, characterized in that the transmission section (30) is further provided with a bending ramp (32) and a bending convex surface (33), the bending ramp (32) being located at the junction of the transmission section (30) and the terminal (20), the bending ramp (32) being provided as a ramp structure having a bending amplitude; the bending convex surface (33) is positioned at the joint of the nut end (10) and the transmission section (30), and the bending convex surface (33) is of a convex surface structure with a certain bending amplitude.