CN220652390U - Coiled welding female terminal - Google Patents

Abstract

A coiled welding female terminal is composed of a plug-in end and a wiring end, and further comprises an elastic piece, wherein the plug-in end is formed by stamping and coiling conductive strip materials, the plug-in end comprises a welding end and a plurality of contact cantilevers, the rear end of the welding end is connected with the wiring end in a welding mode, the contact cantilevers are integrally connected with the front end of the welding end in the circumferential direction, the front ends of the contact cantilevers shrink gradually in the axial direction and then turn outwards to form a plug cavity with a necking groove in a matched mode with a contact pin, the inner surface of the contact cantilever corresponding to the position where the necking groove is located is an arc surface in line contact with the contact pin, and the elastic piece is arranged in the necking groove. The application utilizes the rolling technology to combine reasonable design preparation female terminal, saves process time, realizes that the contact is more firm, increases the contact positive pressure of contact cantilever through increasing the elastic component, makes the female terminal transmission after the line contact more stable, is difficult to become flexible.

Description

Coiled welding female terminal

Technical Field

The utility model relates to the technical field of connectors, in particular to a rolled welding female terminal.

Background

The electric automobile charging socket uses circular jack (female terminal) as the power connection and is not necessary, the existing female terminal adopts machining forming or cold extrusion part forming, the common torsion spring hole structure jack shown in figure 1 or the opening Kong Chakong shown in figure 2 is quite high in machining time, the adopted machining process determines that more materials are consumed, so that the jack finished product cost is higher, and the jack structure formed by other processes is slightly poor in guidance quality, so that the female terminal needs to be reasonably designed, namely, the cost control needs to be met, and excellent performance is realized.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a rolled welding female terminal.

In order to achieve the technical purpose, the adopted technical scheme is as follows: a coiled welding female terminal is composed of a plug-in end and a wiring end, and further comprises an elastic piece, wherein the plug-in end is formed by stamping and coiling conductive strip materials, the plug-in end comprises a welding end and a plurality of contact cantilevers, the rear end of the welding end is connected with the wiring end in a welding mode, the contact cantilevers are integrally connected with the front end of the welding end in the circumferential direction, the front ends of the contact cantilevers shrink gradually in the axial direction and then turn outwards to form a plug cavity with a necking groove in a matched mode with a contact pin, the inner surface of the contact cantilever corresponding to the position where the necking groove is located is an arc surface in line contact with the contact pin, and the elastic piece is arranged in the necking groove.

The root arm thickness of the contact cantilever in the same arm is smaller than the middle arm thickness.

The welding is laser welding.

The elastic piece is matched with the bottom shape of the necking groove.

The elastic piece is a single-circle or multi-circle elastic piece/spring.

The bottom of the rear end of the welding end is provided with a hole which is in plug-in fit with the front end of the wiring terminal.

The holes are round holes formed by rolling.

The utility model has the beneficial effects that:

1. according to the method, the winding process is combined with reasonable design to manufacture the female terminal, the plug-in end and the wiring end are welded, the processing time is saved, and in order to ensure the using effect of the winding forming female terminal, the contact cantilever used for being contacted with the contact pin is designed into a form of contracting towards the axial direction and then outwards turning over, so that the contact of the plug-in end and the contact pin is changed from point contact to point line common contact, the contact is firmer, the contact positive pressure of the contact cantilever is increased by adding the elastic piece, the transmission of the female terminal after the line contact is more stable, and the female terminal is difficult to loosen.

2. The thickness of the arm contacting the root of the cantilever is thinned, so that the root stress of the cantilever can be reduced during plugging, and the service life of the cantilever contacted by the plugging end is ensured.

3. Compared with other connecting structures or connecting methods, the laser welding method further improves the processing speed, enhances the connection firmness between the plug-in end and the wiring end, and has a faster processing speed compared with the common welding.

4. The elastic piece is matched with the bottom shape of the necking groove, so that the elastic piece can be restrained from moving back and forth in the axial direction, and the influence on the movement of the elastic piece during inserting and pulling the contact pin is eliminated.

Drawings

FIG. 1 is a schematic diagram of a prior art torsion spring hole structured jack;

FIG. 2 is a schematic diagram of a prior art open hole jack;

FIG. 3 is a schematic diagram of the structure of the present utility model;

FIG. 4 is a schematic view of the structure of the plug and terminal of the present utility model;

FIG. 5 is a perspective view of a mating end of the present utility model;

FIG. 6 is a front view of the mating end of the present utility model;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6 in accordance with the present utility model;

FIG. 8 is a B-B cross-sectional view of FIG. 6 in accordance with the present utility model;

FIG. 9 is a schematic diagram of the soldering of the plug and terminal of the present utility model;

FIG. 10 is a schematic view of an elastic member made of elastic sheets according to the present utility model;

FIG. 11 is a schematic view of an elastic member made of the spring of the present utility model;

FIG. 12 is a schematic view of the hole structure of the weld end of the present utility model;

fig. 13 is a schematic view of the structure of the terminal of the present utility model;

in the figure:

1. plug-in terminal

11. Contact cantilever, 12, welding end

111. Necking grooves, 112, inserting cavities, 121 and holes

2. Terminal end

21. Protrusion, 22, fixing groove/pin, 23, sealing groove, 24, temperature measuring groove

3. An elastic member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the utility model, which is defined by the claims, but rather by the claims.

References in this specification to orientations or positional relationships as "upper", "lower", "left", "right", "intermediate", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc., are based on the orientation or positional relationships shown in the drawings, are also for convenience of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be construed as limiting the utility model.

And defining one end of the female terminal, which is spliced with the male terminal, as the front, determining the front and the back by using the axial direction of the female terminal, and determining the circumferential direction by taking the axial direction as a central line. As shown in fig. 3, fig. 4 and fig. 5, a rolled welding female terminal is composed of a plugging end 1 and a wiring end 2, wherein the female terminal is made of pure copper, the pure copper has good conductivity and reduces contact resistance, the plugging end 1 is used for being connected with a male terminal, the male terminal is provided with a contact pin matched with the plugging end, the wiring end 2 is connected with a wire or a copper bar in a crimping, welding, bolting and the like manner, the female terminal further comprises an elastic piece 3, the plugging end 1 is formed by stamping and rolling a conductive strip material, the plugging end 1 comprises a welding end 12 and a plurality of contact cantilevers 11, one end (rear end) of the welding end 12 is welded and connected with the wiring end 2, the welding adopts laser welding, the welding is firm, the welding resistance is small, the through-flow temperature rise is low, compared with the common welding, the hot area of the welding seam has small influence, the deformation of a workpiece after the welding is small, the cooling speed is high, therefore, the welding speed is improved, the laser welding process is simple to control, the automation is not easy to realize, and the processing duration is reduced.

As shown in fig. 13, the bottom of the rear end of the welding end 12 is a hole 121 formed by rolling, the front end of the terminal 2 is convex and matched with the hole 121, the front end of the terminal 2 and the welding end 12 can be inserted and then welded, shake of the two parts before welding is avoided, and the coaxiality of welding is ensured. The front end of the wiring terminal 1 is protruded to be a cylinder, and then the inner wall of the welding end 12 is a circular hole in clearance fit with the cylinder, so that the forming, positioning and welding operations are facilitated.

As shown in fig. 1 and 6, a plurality of contact cantilevers 11 are integrally connected along the circumferential direction of the other end (front end) of the welding end 12, the contact cantilevers 11 are uniformly arranged, gaps are reserved between the contact cantilevers 11, the front ends of the contact cantilevers 11 are gradually contracted towards the axial direction and then are turned outwards to form a pin-matched pin-provided pin cavity 112, the pin-provided pin cavity 112 is in interference fit with the pin, the pin-provided pin cavity 111 can raise the positive pressure of the contact, the input end of the pin is in a cylindrical structure, the diameter of the input end of the pin is larger than the diameter of the pin cavity surrounded by the contact cantilevers 11, and when the pin is combined with the pin-provided pin, the contact cantilevers are required to be squeezed out, so that in the A-A direction position, the contact cantilevers are in point contact with the pin, as shown in fig. 8, the inner surface of the contact cantilever 11 corresponding to the position where the pin-provided is in line contact cambered surface, the pin-provided pin contact area is increased, the contact area between the pin and the pin-provided pin cavity 112 is enabled to have a better contact stability, and conductivity is ensured.

The elastic piece 3 is arranged in the necking groove 111, is made of a material with high elasticity, and can be made of rubber rings, spring steel or the like, the elastic piece 3 is used for contracting the contact cantilever 11, the inserting end 1 is supported to be large when the inserting needle is inserted into the inserting cavity 112, the receiving force of the elastic piece is uniform, the positive pressure of the contact between the inserting needle and the inserting end is further improved, the inserting contact stability is improved, and the unstable contact phenomenon caused by long-term use looseness, weak contact cantilever, mechanical vibration and the like is avoided. When the elastic piece 3 is loosened, only the replacement is needed, so that the connection stability between the plug-in end and the pin can be continuously ensured.

As shown in fig. 6, the root arm thickness of the contact cantilever 11 in the same arm is smaller than the middle arm thickness, and the means for reducing the arm thickness is punching thinning or cutting thinning, etc., so that the root of the contact cantilever 11 is thinned to make the root easily yielding, reduce the root stress, and when the contact cantilever 11 is used for multiple plugging and unplugging, the root plugging deformation capability is improved, the arm thickness is reduced to prevent the contact cantilever from being damaged and broken, thereby influencing the service life of the female terminal.

As shown in fig. 1, the cross section of the elastic member 3 is preferably circular, the cross section of the elastic member can be circular, directional, etc., one or more circles can be singly designed to surround the necking groove, the elastic member can be a single-circle or multi-circle elastic sheet or spring, i.e. the elastic member can be singly or multiply designed, the elastic member increases the contact positive pressure of the contact cantilever, and meanwhile, the contact cantilever is prevented from yielding after being inserted and pulled for many times. For example, the coil spring with a multi-turn structure as shown in fig. 11 or the spring sheet with a multi-turn structure as shown in fig. 10, the elastic member 3 and the bottom surface of the necking groove 111 are optimally matched, so that the elastic member can be restrained from moving back and forth, and the movement trend associated with the insertion and extraction can be eliminated.

As shown in fig. 9, the necking groove 111 is of an upward concave structure, and the two side arcs are upward raised, so that the elastic member 3 can be prevented from moving forward and backward, and the bottom is slightly smaller than the diameter of other contact cantilever parts, so that the action of contact positive pressure can be provided. The cross-sectional shape of the necking groove 111 is preferably an arc shape, and the structure is convenient for forming.

The rolling method of the female terminal comprises the steps of stamping a pure copper plate, arranging stamping notches on one side, stamping a plate-shaped structure with a welding end 12 and a contact cantilever 11 which are integrated, and then butt-jointing two end parts of the plate-shaped inserting end for welding and forming. The bending of the necking structure can be formed by bending after welding or before welding.

As shown in fig. 13, the surface of the terminal has a retaining groove/pin 22 which can be cooperatively secured with an external plastic housing retaining pin/groove to prevent rotation of the contact; the sealing groove 23 for the wiring terminal is fixedly provided with a sealing rubber ring and is matched with an external plastic shell to realize the sealing function of the contact element; the terminal is provided with a temperature measuring groove 24 for fixing a temperature sensor, so that the temperature detection function of the contact piece is realized.

The foregoing is merely a preferred example of the present utility model and is not intended to limit or define the utility model. Various modifications and alterations of this utility model will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the scope of protection claimed in the present utility model.

Claims (4)

1. A rolled welding female terminal consists of a plug-in end (1) and a wiring end (2), and is characterized in that: still include elastic component (3), grafting end (1) is rolled up the shaping by the punching press of conducting strip material, grafting end (1) is equipped with hole (121) including welding end (12) and a plurality of contact cantilever (11) bottom the rear end of welding end (12), hole (121) are pegged graft the cooperation with the front end of wiring end (2), hole (121) are roll up fashioned circular hole, the rear end and the wiring end (2) welded connection of welding end (12), be connected with a plurality of contact cantilever (11) along the front end circumference of welding end (12) an organic whole, the root arm thickness of contact cantilever (11) in same arm is less than its middle part arm thickness, the front end of a plurality of contact cantilever (11) is outwards turned over after contracting gradually to the axis direction earlier, form be used for with the contact cantilever (11) that the contact pin adaptation has necking down recess (111) that the position corresponds, the internal surface of necking down recess (111) is the cambered surface that carries out line contact with the contact pin, be equipped with elastic component (3) in necking down recess (111).

2. A rolled welding female terminal as defined in claim 1, wherein: the welding is laser welding.

3. A rolled welding female terminal as defined in claim 1, wherein: the elastic piece (3) is matched with the bottom shape of the necking groove (111).

4. A rolled welding female terminal as defined in claim 1, wherein: the elastic piece (3) is a single-circle or multi-circle shrapnel/spring.