Rotary electric connector

Abstract

The utility model relates to a rotary electric connector. The connector comprises a socket and a plug. The socket is provided with a conductive slip ring group and a first electric connector which are electrically connected, the conductive slip ring group comprises a first slip ring and a plurality of groups of second slip rings which are concentric with the first slip ring and are sequentially arranged outwards, and an insulating ring is arranged between adjacent slip rings of the conductive slip ring group; an elastic contact pin group and a second electric connecting piece which are electrically connected are arranged on the plug, the elastic contact pin group comprises a first elastic contact pin and a plurality of groups of second elastic contact pins which are sequentially arranged by taking the first elastic contact pin as a center, the first elastic contact pin is inserted and rotationally arranged in the first slip ring, and the plurality of groups of second elastic contact pins are in one-to-one correspondence with the plurality of groups of second slip rings; the second elastic contact pins are inserted and slidably arranged in the corresponding second slip rings. The elastic contact pin group is matched with the conductive slip ring group to form a multi-point floating contact composite structure, so that highly smooth transmission of signals is guaranteed, loads are dispersed, abrasion is reduced, and applicability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric connector, specifically relates to a rotary electric connector. BACKGROUND

[0002] In the occasion that the rotating part and the fixed part need to be electrically connected together, the rotary electric connector is needed as an intermediary to connect the rotating part and the fixed part together, prevent the cable between the two parts from being twisted and damaged, and ensure the transmission of signals and electric energy in the rotating state.

[0003] The rotary electric connector generally comprises a shell and a center shaft inserted in the shell, which are rotatably arranged with each other, an electric brush is arranged in the shell, and a slip ring is fixed on the center shaft, the electric brush can slide on the slip ring and keep conductive connection. One of the rotating part and the fixed part is electrically connected with the slip ring, and the other is electrically connected with the electric brush, so that the electrical connection between the rotating part and the fixed part can be realized.

[0004] At present, the rotary electric connector mostly adopts carbon brush or mercury slip ring to achieve the purpose of signal and electric energy transmission. In the working process of the carbon brush type rotary electric connector, due to the friction contact between the carbon brush and the conductive ring, wear is easy to occur, and with the increase of use time, the carbon powder generated by wear will affect the stability of signal transmission to a certain extent, resulting in signal fluctuation, interference and even interruption.

[0005] Although the mercury slip ring has certain advantages in the aspect of conductivity, mercury is a toxic substance, which poses a great threat to the environment and the health of the operating personnel in the process of production, use and subsequent maintenance. In addition, the thermal expansion coefficient of mercury is large, and the environmental temperature for using the mercury slip ring is low. Moreover, the volatilization, leakage and corrosion of the internal mercury and other phenomena will not only affect its normal work, but also increase the maintenance cost and replacement frequency of the equipment, so that the overall operation cost of the equipment is greatly increased.

[0006] These problems limit the application and development of the rotary electric connector. UTILITY MODEL CONTENTS

[0007] The utility model solves the technical problem to provide a rotary electric connector, which utilizes the elastic contact pin group and the conductive slip ring group to cooperate and form a multi-point floating contact composite structure, ensures the smooth transmission of signals, disperses the load, reduces the wear, and improves the applicability.

[0008] The utility model provides a technical scheme of a rotary electric connector provided by the utility model in view of the above technical problem, the rotary electric connector comprises a socket and a plug which rotate and cooperate, the socket is provided with an electrically connected conductive slip ring group and a first electric connecting piece, the conductive slip ring group comprises a first slip ring and a plurality of groups of second slip rings which are arranged outward in sequence and concentric with the first slip ring, an insulating ring is arranged between the adjacent slip rings of the conductive slip ring group, the plug is provided with an electrically connected elastic contact pin group and a second electric connecting piece, the elastic contact pin group comprises a first elastic contact pin and a plurality of groups of second elastic contact pins which are arranged outward in sequence and with the first elastic contact pin as the center, the first elastic contact pin is inserted and rotatably arranged in the first slip ring, a plurality of groups of the second elastic contact pins correspond to a plurality of groups of the second slip rings one by one, the second elastic contact pin is inserted and slidably arranged in the corresponding second slip ring, and the elastic contact pin group is electrically connected with the conductive slip ring group.

[0009] Further, each group of the second elastic contact pin comprises two and is arranged symmetrically with the first elastic contact pin as the center.

[0010] Further, the line of two second elastic contact pins of one group and the line of two second elastic contact pins of the adjacent group are arranged in cross orthogonally.

[0011] Further, the length and diameter of the first elastic contact pin are greater than those of the second elastic contact pin.

[0012] Further, the socket further comprises a first insulating support structure for supporting and fixing the conductive slip ring group and the first electric connecting piece, and the plug further comprises a second insulating support structure for supporting and fixing the elastic contact pin group and the second electric connecting piece.

[0013] Further, the first insulating support structure and the second insulating support structure are integrally injection molded by an insulating material.

[0014] Further, the insulating material is polyphenylene sulfide.

[0015] Further, the conductive slip ring group and the first electric connecting piece are arranged at two ends of the socket, the first electric connecting piece comprises a plurality of groups of socket terminals, and the plurality of groups of socket terminals are connected with the slip rings of the conductive slip ring group one by one.

[0016] Further, the elastic contact pin group and the second electric connecting piece are arranged at two ends of the plug, the second electric connecting piece comprises a plurality of groups of plug terminals, and the plurality of groups of plug terminals are connected with the contact pins of the elastic contact pin group one by one.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] (1) The plug and the socket are provided with matched conductive slip ring groups and elastic contact pin groups, the first elastic contact pin is inserted and rotationally arranged in the first slip ring, the second elastic contact pin is inserted and slides along the corresponding second slip ring, the plug and the socket can be rotationally matched.

[0019] Meanwhile, the multiple elastic contact pins and the matched conductive slip rings form a multi-point floating contact composite structure, so that the signals can be smoothly and unobstructively transmitted during high-speed rotation.

[0020] The spring contact pin can be stretched and contracted in the matching direction of the plug and the socket, and the elastic deformation and good conductivity of the spring contact pin can realize stable and reliable electrical connection.

[0021] (2) Each group of second elastic contact pins includes two and is symmetrically arranged with the first elastic contact pin as the center, and the respective connecting lines of the adjacent groups of second elastic contact pins are crosswise and orthogonally arranged, so that electrical interference can be reduced and signal transmission stability can be improved on the basis of ensuring stable operation.

[0022] (3) The first insulation support and the second insulation support are integrally injection molded, so that stability can be improved and shaking during operation can be avoided. DETAILED DESCRIPTION

[0023] Figure 1 is a front view of the plug of the rotary electrical connector in the embodiment 1 of the utility model.

[0024] Figure 2 is a right view of the plug of the rotary electrical connector in the embodiment 1 of the utility model.

[0025] Figure 3 is a front half-section view of the plug of the rotary electrical connector in the embodiment 1 of the utility model.

[0026] Figure 4 is a front view of the socket of the rotary electrical connector in the embodiment 1 of the utility model.

[0027] Figure 5 is a right view of the socket of the rotary electrical connector in the embodiment 1 of the utility model.

[0028] Figure 6 is a front half cut view of the socket of the rotary electrical connector in the embodiment 1 of the utility model.

[0029] Figure 7 is a front cut view of the cooperation of the plug and the socket in the embodiment 1 of the utility model.

[0030] In the drawing: 1, socket; 11, conductive slip ring group; 12, first electrical connecting piece; 13, first support structure; 14, first slip ring; 15, second slip ring; 16, socket terminal; 17, insulating ring

[0031] 2, plug; 21, elastic contact pin group; 22, second electrical connecting piece; 23, second support structure; 24, first elastic contact pin; 25, second elastic contact pin; 26, plug terminal. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application: Specific embodiment 1:

[0034] Reference Figures 1 to 7 The utility model discloses a rotary electrical connector includes the socket and the plug of rotation cooperation. The socket is provided with electrically connected conductive slip ring group and first electrical connecting piece, and the conductive slip ring group includes first slip ring and, with first slip ring concentric outwardly arranged in proper order multiple second slip ring, and the insulating ring is arranged between the adjacent slip ring of conductive slip ring group. The plug is provided with electrically connected elastic contact pin group and second electrical connecting piece, and the elastic contact pin group includes first elastic contact pin and, with first elastic contact pin as the center outwardly arranged in proper order multiple second elastic contact pin, and first elastic contact pin is inserted and rotates the setting in first slip ring, and multiple second elastic contact pin and multiple second slip ring one to one, and second elastic contact pin is inserted and slides the setting in the corresponding second slip ring, and elastic contact pin group and conductive slip ring electrically connected electrically.

[0035] Specifically, in the embodiment, in order to guarantee the sliding and contact reliable, as shown in Figure 6 , 7 The first elastic contact pin is inserted into the inner hole of the first conductive slip ring, the second conductive slip ring is an annular slide groove structure arranged with the opening facing the plug, the second elastic contact pin is inserted into the corresponding annular slide groove, and the inner and outer groove walls of the annular slide groove are contacted to realize reliable electrical connection.

[0036] Specifically, in the embodiment, the first connecting component and the second connecting component are arranged on both sides of the mating surface of the conductive slip ring set and the elastic contact pin set, and the first connecting component and the second connecting component are connected with the fixed component and the rotating component respectively, so that the rotating component and the fixed component are electrically connected by the rotary electrical connector, and the cable winding is avoided.

[0037] In the embodiment, the conductive slip ring set is also designed with special conductive materials and structures, so as to further ensure the stability and high-speed signal transmission between the rotating component and the fixed component. Specifically, each slip ring of the conductive slip ring set is made of copper alloy conductive material and is gold-plated, so that the material not only has excellent electrical conductivity, but also has excellent oxidation resistance, high surface hardness and wear resistance, and can still maintain the stability and reliability of signal transmission in a high-speed rotating harsh environment. At the same time, the conductive slip ring set is also subjected to appropriate heat treatment, such as quenching and tempering, so as to improve the hardness and toughness of the material and enhance the wear resistance. In other embodiments, each conductive slip ring of the conductive slip ring set can also be made of carbon composite material, which has better self-lubricating performance and wear resistance.

[0038] Preferably, in the embodiment, the socket further comprises a first insulating support structure for supporting and fixing the conductive slip ring set and the first electrical connecting component, and the plug further comprises a second insulating support structure for supporting and fixing the elastic contact pin set and the second electrical connecting component. The outer periphery of the first insulating support structure and the second insulating support structure constitutes the outer shell of the socket and the plug.

[0039] Preferably, in the embodiment, the first insulating support structure and the second insulating support structure are integrally injection molded by insulating material. In this way, the first insulating support structure injection fills the gap between the conductive slip ring set and the first electrical connecting component, forms corresponding insulating rings between adjacent slip rings, and forms the fixed outer shell of the socket, so that the entire socket is integrally formed as a whole, ensuring stability and reliability. Similarly, the second insulating support structure injection fills the gap between the elastic contact pin set and the second electrical connecting component, and seals and fixes the two, forming an insulating plug shell, and the entire plug is fixed as a whole to avoid shaking and ensure reliable operation.

[0040] Specifically, in the embodiment, the insulating material is polyphenylene sulfide (PPS). Taking the assembly of the socket as an example, after the assembly of the conductive ring set and the first electrical connecting component is completed, they are fixed in the mold to ensure that each component remains in the correct position during the subsequent pouring process, ensuring the accuracy and quality of the final product. Then the workers start to prepare the polyphenylene sulfide insulating material, which is an excellent engineering plastic known for its excellent heat resistance, chemical resistance and mechanical strength.

[0041] After the preparation is completed, the polyphenylene sulfide material is heated above its melting point to become liquid. Then, through the high-pressure injection system of the injection molding machine, the molten polyphenylene sulfide material is injected into the mold. Under the joint action of high pressure and the mold, the polyphenylene sulfide tightly wraps the conductive slip ring group and the first electrical connector to form an insulator and a support structure. The entire process needs to strictly control the temperature and pressure to ensure the uniform distribution of the material and the quality of the final product. After cooling and solidification are completed, the mold is opened, and the production of the socket is completed. In this way, the entire socket shell not only protects the internal conductive slip ring group, but also ensures the reliability and safety of the entire device in harsh environments.

[0042] The casting process of the plug is similar to the casting process of the socket described above, and will not be described again.

[0043] Preferably, in the present embodiment, as shown in Figure 2 , each group of second elastic contact pins includes two and is symmetrically arranged around the first elastic contact pin. The line connecting the two elastic contact pins of each group of second elastic contact pins is arranged in a cross orthogonal manner with the line connecting the two elastic contact pins of its adjacent group. This arrangement can reduce electrical interference and improve the stability of signal transmission while ensuring stable operation.

[0044] Specifically, in the present embodiment, as shown in Figure 2 , 5 , the second conductive slip ring includes three groups, and the same second elastic contact pin also includes three groups, wherein the line connecting the two second elastic contact pins of the innermost group intersects the line connecting the two second elastic contact pins of the middle group, and the two outermost first elastic contact pins are arranged in line with the two innermost first elastic contact pins.

[0045] Preferably, in the present embodiment, the first elastic contact pin serves as the rotation axis, as shown in Figure 3 , the length and diameter of the first elastic contact pin are greater than those of the second elastic contact pin, which can ensure reliable operation during rotation. Similarly, the length of the exposed part of the first elastic contact pin is greater than that of the second elastic contact pin, the depth of the first conductive slip ring is greater than that of the second conductive slip ring, the first elastic contact pin abuts the bottom of the first conductive slip ring, and the second elastic contact pin abuts the bottom of the second conductive slip ring, thereby improving stability.

[0046] Preferably, in the present embodiment, the conductive slip ring group and the first electrical connector are arranged at two ends of the socket, and the first electrical connector includes multiple groups of socket terminals, which are one-to-one corresponding to the slip rings of the conductive slip ring group, and the inner end of each group of socket terminals extends towards the conductive slip ring group and is in contact with the corresponding slip ring.

[0047] The elastic contact pin groups and the second electrical connectors are arranged at two ends of the plug, the second electrical connectors include a plurality of plug terminals, the plurality of plug terminals correspond to the elastic contact pins of the elastic contact pin groups one by one, and inner ends of the plug terminals extend towards the elastic contact pin groups and are electrically connected with the corresponding elastic contact pins.

[0048] The rotating electrical connector plug and the socket are provided with the mutually matched conductive slip ring groups and the elastic contact pin groups, the first elastic contact pin is inserted into and rotatably arranged in the first slip ring, the second elastic contact pin is inserted into and slides along the corresponding second slip ring, and the plug and the socket can be rotatably matched. The insulating rings are used for isolating signal interference between the conductive rings and improving transmission efficiency.

[0049] The spring contact pins can be stretched and contracted in the matching direction of the plug and the socket, the elastic deformation and good conductivity of the spring contact pins are utilized to realize stable and reliable electrical connection. The automatic compensation function of the spring contact pins can offset the connection gap caused by temperature change, vibration and the like, the position between the spring contact pins and the corresponding slip rings is automatically adjusted in the rotating process, and abrasion is reduced. The plug and the socket can keep close contact in complex environments such as vibration and impact, the conductivity efficiency and the connection reliability are improved, long-term stable electrical connection is ensured, and the applicability of the rotating electrical connector in different application occasions is ensured.

[0050] The working process of the application is as follows: in the embodiment, the plug terminals are inserted into the rotating part, the socket terminals are inserted into the fixed part, and the elastic contact pin groups are inserted into the conductive slip ring groups, the connection between the rotating part and the fixed part is realized, and the rotating electrical connector is used to realize the rotating conduction between the rotating part and the fixed part.

[0051] The rotating electrical connector supports high-speed signal transmission through the optimized conductive slip ring group and the elastic contact pin group design. The service life and the reliability of the connector are improved by optimizing the abrasion performance of the conductive slip ring group. The maintenance cost and the time cost caused by abrasion and failure are reduced.

[0052] The above is only a preferred embodiment of the application and is not used for limiting the application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the application shall be included in the protection scope of the application.

[0053] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0054] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. As "horizontal" only means that its direction is relatively more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

Claims

1. A rotary electrical connector, characterized by, The socket and the plug are in a rotating fit; the socket is provided with an electrically connected conductive slip ring set and a first electric connecting member, the conductive slip ring set comprises a first slip ring and a plurality of second slip rings arranged concentrically outwardly in sequence; an insulating ring is arranged between adjacent slip rings of the conductive slip ring set; the plug is provided with an electrically connected elastic contact pin set and a second electric connecting member, the elastic contact pin set comprises a first elastic contact pin and a plurality of second elastic contact pins arranged outwardly in sequence with the first elastic contact pin as the center, the first elastic contact pin is inserted and arranged in rotation in the first slip ring, the plurality of second elastic contact pins correspond to the plurality of second slip rings one by one, the second elastic contact pin is inserted and arranged in sliding in the corresponding second slip ring, and the elastic contact pin set is electrically connected with the conductive slip ring set.

2. The rotary electrical connector of claim 1, wherein, Each of the second elastic contact pins comprises two and is arranged symmetrically with the first elastic contact pin as the center.

3. The rotary electrical connector of claim 2, wherein, The line connecting the two second elastic contact pins of one group and the line connecting the two second elastic contact pins of the adjacent group are arranged in a cross orthogonal manner.

4. The rotary electrical connector of claim 1, wherein, The length and diameter of the first elastic contact pin are greater than those of the second elastic contact pin.

5. The rotary electrical connector of claim 1, wherein, The socket further comprises a first insulating support structure for supporting and fixing the conductive slip ring set and the first electric connecting member, and the plug further comprises a second insulating support structure for supporting and fixing the elastic contact pin set and the second electric connecting member.

6. The rotary electrical connector of claim 5, wherein, The first insulating support structure and the second insulating support structure are integrally injection molded by an insulating material.

7. The rotary electrical connector of claim 6, wherein, The insulating material is polyphenylene sulfide.

8. The rotary electrical connector of claim 1, wherein, The conductive slip ring set and the first electric connecting member are arranged at two ends of the socket, the first electric connecting member comprises a plurality of socket terminals, and the plurality of socket terminals are connected with the slip rings of the conductive slip ring set one by one.

9. The rotary electrical connector of claim 1, wherein, The elastic contact pin set and the second electric connecting member are arranged at two ends of the plug, the second electric connecting member comprises a plurality of plug terminals, and the plurality of plug terminals are connected with the contact pins of the elastic contact pin set one by one.

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