CN210668702U - Large-current jack - Google Patents

Abstract

The utility model discloses a large current jack, including the jack body, jack body one end is provided with the jack, is provided with the wire connecting hole on the jack other end, wire one end and binding post fixed connection, and binding post passes through in screw thread locking fixed connection to the wire connecting hole, be provided with a plurality of concave-convex structures on the jack inner wall, the wall of jack is split into a plurality of pieces along the axial, and the wall outside of jack is provided with the strengthening rib. The utility model discloses a structure of change plug inner contact surface for under the same contact pin diameter, the electric current capacity of passing through has improved more than one time.

Description

Large-current jack

Technical Field

The invention relates to the field of connectors, in particular to an electric connector for a traction transformer, which is used on a motor car.

Background

The electric connector socket used for the output of the traction transformer is immersed in transformer oil, the output current is large, the temperature of the transformer oil is increased, and the socket is difficult to overhaul, so that the electric connector is required to have high oil resistance, high protection performance, high electric performance and high maintainability.

The existing electric connector uses engineering plastics as insulating materials, has good electrical performance, but has a degradation effect on the insulating performance of the plastics after being soaked in transformer oil for a long time, and has higher failure risk. In terms of protection performance, the existing electric connector uses a rubber sealing ring for sealing to prevent leakage of transformer oil, and aging of rubber is inevitable, which requires periodic replacement of the rubber sealing ring, and replacement cost is very high due to transformer oil. The existing electric connector contact pin installation mode and wiring mode are integral, and can only be integrally replaced when needing maintenance and replacement, thereby causing great cost waste. The transformer has large output current, the overcurrent capacity of the existing electric connector is increased by improving the sectional area of a contact pair, and the electric connector is correspondingly increased, so that the electric connector is not beneficial to installation and use.

For the existing plug matched with the socket, the connection between the contact pin and the jack always has the trouble of small effective contact area due to the manufacturing process and the use environment, and the maintenance of the jack body can cause the replacement of the cable due to the connection of the cable, so that the field construction maintenance is not facilitated. The prior elastic element is usually in the form of a socket-splitting groove closing-up, or an elastic part is added, and the following disadvantages are caused by the prior elastic element:

1. the elasticity of the opening of the split groove is generated by the strength of the material, and the strength is high, the conductivity is reduced, the temperature of the contact is increased, and particularly when a large current is passed, the contact failure can be caused;

2. one more contact conversion is realized by adding one part, so that the contact resistance is increased inevitably, and the product is likely to lose efficacy when passing large current;

3. no matter the groove is split to close or the parts are added, when a large current is passed, the diameter of the contact pair is increased along with the increase of the current, and when the current reaches a certain magnitude, the diameter of the contact pair is large, so that the product is large in size and difficult to operate;

4. the connection of the large-current jack and the cable usually adopts a compression mode or a terminal, but the connection has the defects of low reliability and difficult operation.

Disclosure of Invention

The invention provides an improvement on the basis of the prior art, and aims to design a new jack structure on the basis of the existing large-current jack, wherein the structure has an energizing load which can be improved by more than one time under the condition of the same diameter.

The invention also aims to change the connection mode of the jack body and the lead, improve the contact area of the lead and the jack body, improve the connection reliability and facilitate maintenance.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a large-current jack, includes the jack body, jack body one end is provided with the jack, is provided with the wire connecting hole on the jack other end, wire one end and binding post fixed connection, in binding post passes through screw thread locking fixed connection to wire connecting hole, be provided with a plurality of concave-convex structures on the jack inner wall, the wall of jack is split into a plurality of pieces along the axial, and the wall outside of jack is provided with the strengthening rib.

In the above technical scheme, in the wall surface which is split into a plurality of blocks, each block is provided with a concave-convex structure.

In the above technical solution, the concave-convex structure is uniformly distributed on the inner wall surface of the insertion hole.

In the above technical scheme, the reinforcing ribs are metal wires, and the metal wires are wound outside the insertion holes along the angular directions of the insertion holes.

In the technical scheme, a nut is arranged in the wire connecting hole, and one end of the connecting terminal penetrates through the wire connecting hole and then is connected with the nut.

In the technical scheme, the part of the wiring terminal penetrating through the wire connecting hole is connected with the nut through the threaded connecting end, and the part of the wiring terminal contacting with the jack body in the wire connecting hole is of a conical surface structure.

In the above technical solution, the connecting surface of the wire connecting hole is of a conical structure from one end to the other end, and the terminal portion connected in a matching manner with the wire connecting hole is of a conical structure.

In the technical scheme, the wire is fixedly connected with one end of the wiring terminal in a crimping mode, and the wire is connected with the jack body through the wiring terminal.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

the structure of the contact surface in the plug is changed, so that the current passing capacity is improved by more than one time under the condition of the same diameter of the contact pin;

the invention adopts the detachable structure design, so that the jack body can be directly maintained or replaced under the condition that the conducting wire does not need to be trimmed or replaced, the maintainability of the integral connector is improved, and the maintenance cost is reduced.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of a structure of a jack body

Wherein: 1 is the steel wire, 2 is the lamella form jack, 3 is the jack body, 4 is the nut, 5 is binding post, 6 is the wire.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

In the traditional jack body structure, jacks adopt an inner cylindrical structure, and wall surfaces are smooth surfaces. In theory, the contact area between smooth walls is the largest when the cylinders are of uniform diameter. However, in practical experiments, it is found that tolerance occurs between the pin and the socket due to our machining process, a position offset occurs between the pin and the socket due to uneven stress during the connection process, and particularly, displacement occurs between the pin and the socket due to external vibration after connection. These real-world factors all result in a reduced contact area between the pin and the socket.

In order to ensure the maximum increased current throughput in the effective contact area, the inner wall of the jack is split into a plurality of lobes, each lobe is provided with a concave-convex structure, and the contact surface between the contact pin and the jack is increased through the lobe structure. As shown in fig. 1, theoretically, the contact between the pin and the socket is only at the tangent position of each lobe on the socket and the pin, so that the more the number of lobes is, the more the contact points are, and the larger the contact area is; however, since the strength of the jack body is reduced when the number of the lobes is large, the steel wire 1 for reinforcement is provided at a position corresponding to the jack 2 on the outer wall of the jack body 3, and the steel wire fixes and reinforces the plurality of lobes of the jack body. The steel wire is arranged between the jack body and the plug shell and is sleeved on the jack body in a ring mode.

When the contact pin inserts in jack 2, the jack body of lamella form receives the effort of steel wire 1 to provide a sufficient elastic force for the contact pin, takes place the angle with the hole when the contact pin and deflects the back, can carry out the calibration of position through the tightening force of steel wire to contact pin and jack, ensures that contact pin and jack can keep comprehensive contact all the time. Experiments show that the mode effectively increases the contact points of the jack body and the contact pins by increasing the grooves under the condition of meeting the strength of the jack body, correspondingly increases the contact area, improves the current passing capacity, and can improve the current passing capacity by more than one time under the same diameter of the contact pin.

The jack body is provided with jacks and only wire connecting holes, the jacks are connected with the contact pins of the socket, and the wire connecting holes are used for connecting wires. In the traditional way, the wire is generally extruded into the connecting hole of the jack body in an extrusion mode for the connection of the wire, the connection mode is very practical, but because the connector is used in a high-voltage high-current environment, when the jack body is maintained, the wire end after being taken down needs to be deformed due to extrusion, the deformed wire cannot be used for the second time due to the change of the physical form of the deformed wire, the connecting end part needs to be replaced, but the wire replacement is obviously impossible in practical application, the wire can only be repaired, the wire is repaired on the premise that the wire needs to have enough allowance during initial installation, the wire after being repaired can meet the use requirement, but the construction scheme can increase the difficulty of electrical construction.

Therefore, in this embodiment, the connection terminal 5 is added between the wire and the jack body, one end of the connection terminal 5 is fixedly connected with the wire 6 in a crimping manner, and the conduction between the wire and the jack body is realized through the connection terminal. In this embodiment, in order to fix the connection terminal 5, a through wire connection hole is first provided in the socket body 3, an inner counterbore is provided at one end of the wire connection hole, and a nut 4 for locking is provided in the inner hole. The outside of one end of the wiring terminal is provided with a thread, and the end of the wiring terminal with the thread passes through the wire connecting hole and then is in threaded connection with the nut in the inner counter bore. The wiring terminal is fixedly connected with the jack body through the pulling force of the threaded connection.

In order to ensure that the jack body is fixedly connected with the connecting terminal, one part of the wire connecting hole is provided with a conical hole, the corresponding connecting terminal is also provided with a conical surface, and the conical degree of the connecting terminal is matched with that of the wire connecting hole. When the nut is screwed and tightened, the tapered surfaces of the nut and the nut are tightly attached to each other, and the tapered surfaces are smooth planes in order to ensure the reliability of connection.

When in practical use, if the jack body needs to be maintained or replaced, the wiring terminal and the jack body can be separated only by tightening and loosening the nut, and the conventional mode that the wire needs to be repaired or reinstalled is not needed.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.

Claims (8)

1. The utility model provides a large-current jack, includes the jack body, its characterized in that jack body one end is provided with the jack, is provided with the wire connecting hole on the jack other end, wire one end and binding post fixed connection, and binding post passes through screw thread locking fixed connection to in the wire connecting hole, be provided with a plurality of concave-convex structures on the jack inner wall, the wall of jack is split into a plurality of pieces along the axial, and the wall outside of jack is provided with the strengthening rib.

2. A high current socket according to claim 1, wherein the walls are split into a plurality of pieces, each piece having a relief structure.

3. A high current socket according to claim 1 or 2, wherein said relief structure is uniformly distributed on the inner wall surface of the socket.

4. A high current socket according to claim 1, wherein said reinforcing rib is a wire wound around the outside of the socket along the angular direction of the socket.

5. A high current jack according to claim 1, wherein a nut is disposed in said wire connecting hole, and one end of said terminal is connected to said nut after passing through said wire connecting hole.

6. A high current jack according to claim 5, wherein the portion of said terminal extending through said wire connecting hole is a threaded end for engaging a nut, and the portion of said terminal in contact with the body of said jack within said wire connecting hole is tapered.

7. A large current jack according to any one of claims 5 or 6, wherein the connecting surface of the wire connecting hole has a tapered structure from one end to the other end, and the terminal portion to be connected to the wire connecting hole is tapered.

8. A high current jack according to claim 1, wherein said wire is fixedly connected to one end of said terminal by crimping, and said wire is connected to said jack body by said terminal.

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