阅读说明：本技术 一种单通道同轴旋转关节 (Single-channel coaxial rotary joint ) 是由 刘明 于 2021-02-04 设计创作，主要内容包括：本发明公开了一种单通道同轴旋转关节,包括中空结构的壳体,壳体的内部安装有转动连接的定子部和转子部,定子部的中部穿设有第一中心导体,第一中心导体在壳体内部的一端设有石墨针,石墨针与第一中心导体之间设有弹簧；转子部设有与定子部同轴的旋转体,旋转体的中间位置套设有与壳体固定安装的轴承,旋转体的中部穿设有第二中心导体,第二中心导体的一端设有与石墨针旋转接触的摩擦件,旋转体的端部外侧套设有与第一摩擦环接触的第二摩擦环。本发明的有益效果：通过转子和定子结合部位,即旋转体和壳体装配间隙采用高精度轴承连接,保证同轴心旋转；整体的结构紧凑,减小了整体器件的尺寸。(The invention discloses a single-channel coaxial rotary joint which comprises a shell with a hollow structure, wherein a stator part and a rotor part which are rotatably connected are arranged in the shell; the rotor portion is equipped with the rotator coaxial with the stator portion, and the intermediate position cover of rotator is equipped with the bearing with casing fixed mounting, and the middle part of rotator is worn to be equipped with second center conductor, and the one end of second center conductor is equipped with the friction part with the rotatory contact of graphite needle, and the tip outside cover of rotator is equipped with the second friction ring with first friction ring contact. The invention has the beneficial effects that: the rotor and the stator are combined, namely the assembly gap between the rotating body and the shell is connected by adopting a high-precision bearing, so that coaxial rotation is ensured; the whole structure is compact, and the size of the whole device is reduced.)

1. A single-channel coaxial rotary joint comprises a shell (1) with a hollow structure, a stator part and a rotor part which are rotatably connected are arranged in the shell (1), the stator is characterized in that a first central conductor (2) penetrates through the middle of the stator part, a graphite needle (2-1) is arranged at one end of the first central conductor (2) in the shell (1), a spring (2-2) is arranged between the graphite needle (2-1) and the first central conductor (2), the outer side of the first central conductor (2) is sleeved with a grid sheet (2-3) fixedly arranged with the inner wall of the shell (1), the joint of the middle part of the grid plate (2-3) and the first central conductor (2) is of a round long cylinder structure, and a first friction ring (2-4) is sleeved on the outer side of the long cylinder;

the rotor part is provided with a rotating body (3) coaxial with the stator part, the middle position sleeve of the rotating body (3) is provided with a bearing (3-1) fixedly installed with the shell (1), the middle part of the rotating body (3) is provided with a second central conductor (3-2) in a penetrating mode, one end of the second central conductor (3-2) is provided with a friction piece (3-3) in rotary contact with the graphite needle (2-1), and the outer side sleeve of the end part of the rotating body (3) is provided with a second friction ring (3-4) in contact with the first friction ring (2-4).

2. A single channel coaxial rotary joint according to claim 1, characterized in that the housing (1) is provided with a flange structure for connection to a device outside one end of the stator part.

3. A single channel coaxial rotary joint according to claim 1, characterized in that the rotor part is externally provided with a locking nut (4) screwed onto the housing (1).

4. The single-channel coaxial rotary joint according to claim 1, wherein the outer end of the first central conductor (2) is provided with a first SMA connector (2-5) fixedly connected with the shell (1), and the outer end of the second central conductor (3-2) is provided with a second SMA connector (3-5) fixedly connected with the rotary body (3).

5. The single-channel coaxial rotary joint according to claim 3, wherein a fixing nut (3-6) in threaded connection with the rotary body (3) is arranged on one side, close to the stator part, of the bearing (3-1), a pressing ring (3-7) and an oil seal (3-8) are sequentially arranged on the other side of the bearing (3-1), and the oil seal (3-8) is in contact with the end face of the locking nut (4).

6. A single-channel coaxial rotary joint according to claim 5, wherein two bearings (3-1) are provided and are arranged adjacently, and the adjacent contact surfaces of the two bearings (3-1) are provided with gaskets (3-9).

7. The single-channel coaxial rotary joint according to claim 1, wherein the head of the graphite needle (2-1) is of a semicircular structure, and the end of the friction member (3-3) in contact with the graphite needle (2-1) is matched with the semicircular structure.

8. The single-channel coaxial rotary joint of claim 1, wherein one side of the grid (2-3) is provided with a plurality of fixing holes, elastic needles (2-6) are inserted into the fixing holes, and the elastic needles (2-6) penetrate through the first friction ring (2-4) to be in contact with the end face of the second friction ring (3-4).

Technical Field

The invention relates to the technical field of microwave rotary joints, in particular to a single-channel coaxial rotary joint.

Background

The microwave rotary joint is a special device with electromechanical integration characteristic, which ensures that microwave signal transmission is uninterrupted in the radar tracking rotation process, the domestic microwave rotary joint technology is continuously improved along with the development of radar communication technology, and the technology covers various fields of wireless communication nowadays, is mature, and mainly comprises two microwave rotary joints of a contact type and a non-contact type.

Due to different use environments, the rotary joint has certain limitations and a complex structure, so that the number of internal parts is too large, and the size is too large; on the other hand, in use, the rotating parts are assembled in a gap and the use environment causes thermal deformation, so that the coaxiality difference is generated, and the rotation fluctuation is too large.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

In view of the above technical problems in the related art, the present invention provides a single-channel coaxial rotary joint, which can overcome the above disadvantages in the prior art.

In order to achieve the technical purpose, the technical scheme of the invention is realized as follows: a single-channel coaxial rotary joint comprises a shell with a hollow structure, wherein a stator part and a rotor part which are connected in a rotating mode are installed inside the shell, a first central conductor penetrates through the middle of the stator part, a graphite needle is arranged at one end of the first central conductor inside the shell, a spring is arranged between the graphite needle and the first central conductor, a grid piece fixedly installed on the inner wall of the shell is sleeved on the outer side of the first central conductor, the joint of the middle of the grid piece and the first central conductor is of a round long cylinder structure, and a first friction ring is sleeved on the outer side of the long cylinder;

the rotor part is provided with a rotating body coaxial with the stator part, a bearing fixedly installed with the shell is sleeved at the middle position of the rotating body, a second central conductor is arranged in the middle of the rotating body in a penetrating mode, one end of the second central conductor is provided with a friction piece in rotary contact with the graphite needle, and a second friction ring in contact with the first friction ring is sleeved on the outer side of the end portion of the rotating body.

Further, the shell is provided with a flange structure connected with a device at the outer side of one end of the stator part.

Further, a locking nut which is in threaded connection with the shell is arranged outside the rotor part.

Furthermore, the outer end of the first central conductor is provided with a first SMA joint fixedly connected with the shell, and the outer end of the second central conductor is provided with a second SMA joint fixedly connected with the rotating body.

Further, the bearing is close to stator portion one side be equipped with rotator threaded connection's fixation nut, the opposite side of bearing is equipped with clamping ring and oil blanket in proper order, the oil blanket with lock nut's end face contact.

Further, the bearing is equipped with two, and adjacent setting, two the adjacent contact surface of bearing all is equipped with the gasket.

Further, the head of the graphite needle is of a semicircular structure, and one end, in contact with the graphite needle, of the friction piece is matched with the semicircular structure.

Furthermore, one side of the grid is provided with a plurality of fixing holes, elastic needles are inserted into the fixing holes, and the elastic needles penetrate through the first friction ring and are contacted with the end face of the second friction ring.

The invention has the beneficial effects that: the rotor and the stator are combined, namely the assembly gap between the rotating body and the shell is connected by adopting a high-precision bearing, so that coaxial rotation is ensured; the whole structure is compact, and the size of the whole device is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a single-channel coaxial rotary joint according to an embodiment of the present invention.

In the figure: 1. a housing; 2. a first center conductor; 2-1, graphite needles; 2-2, a spring; 2-3, grid pieces; 2-4, a first friction ring; 2-5, a first SMA connector; 2-6, flicking the needle; 3. a rotating body; 3-1, bearing; 3-2, a second center conductor; 3-3, friction piece; 3-4, a second friction ring; 3-5, a second SMA connector; 3-6, fixing a nut; 3-7, pressing a ring; 3-8, oil sealing; 3-9, a gasket; 4. and locking the nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

As shown in fig. 1, the single-channel coaxial rotary joint according to the embodiment of the present invention includes a housing 1 having a hollow structure, a stator portion and a rotor portion rotatably connected to each other are installed inside the housing 1, a first central conductor 2 is inserted into a middle portion of the stator portion, one end of the first central conductor 2 inside the housing 1 is provided with a graphite needle 2-1, a spring 2-2 is provided between the graphite needle 2-1 and the first central conductor 2, a grid 2-3 fixedly installed on an inner wall of the housing 1 is sleeved outside the first central conductor 2, a connection portion between the middle portion of the grid 2-3 and the first central conductor 2 is a circular long cylinder structure, and a first friction ring 2-4 is sleeved outside the long cylinder;

the graphite needle rotor structure comprises a rotor part, a stator part and a shell, and is characterized in that the rotor part is provided with a rotating body 3 coaxial with the stator part, a bearing 3-1 fixedly mounted with the shell 1 is sleeved at the middle position of the rotating body 3, a second central conductor 3-2 penetrates through the middle part of the rotating body 3, one end of the second central conductor 3-2 is provided with a friction part 3-3 in rotary contact with the graphite needle 2-1, and a second friction ring 3-4 in contact with the first friction ring 2-4 is sleeved on the outer side of the end part of the rotating body 3.

In a particular embodiment of the invention, the housing 1 is provided with a flange structure for connection to a device outside one end of the stator part.

In a particular embodiment of the invention, the rotor part is externally provided with a lock nut 4 screwed onto the housing 1.

In a specific embodiment of the present invention, the outer end of the first central conductor 2 is provided with a first SMA contact 2-5 fixedly connected with the housing 1, and the outer end of the second central conductor 3-2 is provided with a second SMA contact 3-5 fixedly connected with the rotating body 3.

In a specific embodiment of the invention, a fixing nut 3-6 in threaded connection with the rotating body 3 is arranged on one side of the bearing 3-1 close to the stator part, a pressing ring 3-7 and an oil seal 3-8 are sequentially arranged on the other side of the bearing 3-1, and the oil seal 3-8 is in contact with the end face of the locking nut 4.

In a specific embodiment of the invention, two bearings 3-1 are arranged adjacently, and the adjacent contact surfaces of the two bearings 3-1 are provided with gaskets 3-9.

In a specific embodiment of the present invention, the head of the graphite needle 2-1 has a semicircular structure, and the end of the friction member 3-3 contacting the graphite needle 2-1 is matched with the semicircular structure.

In a specific embodiment of the invention, one side of the grid plate 2-3 is provided with a plurality of fixing holes, elastic needles 2-6 are inserted into the fixing holes, and the elastic needles 2-6 penetrate through the first friction ring 2-4 to be in contact with the end face of the second friction ring 3-4.

In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.

The single-channel coaxial rotary joint comprises a shell 1 with a hollow structure, wherein a stator part and a rotor part which are connected in a rotating mode are installed inside the shell 1;

the stator part is installed, firstly, a grid plate 2-3 is pressed in a central hole of a shell 1, three fixing holes are formed in the end face of the grid plate 2-3, elastic needles 2-6 are inserted into the fixing holes, the elastic needles 2-6 penetrate through first friction rings 2-4 to be in contact with the end face of second friction rings 3-4, the connecting part of the middle parts of the grid plates 2-3 and a first central conductor 2 is of a circular long cylinder structure, and the first friction rings 2-4 are sleeved on the outer side of the long cylinder to ensure that the first friction rings 2-4 are coaxial with the first central conductor 2;

a first central conductor 2 is arranged in the middle of a first SMA connector 2-5, the outer part of the first SMA connector 2-5 is in threaded connection with a shell 1, an insulator is arranged between the first SMA connector 2-5 and the first central conductor 2, a graphite needle 2-1 is arranged at one end of the first central conductor 2 in the shell 1, and a spring 2-2 is arranged between the graphite needle 2-1 and the first central conductor 2; the head of the graphite needle 2-1 is of a semicircular structure, one end of the friction piece 3-3, which is contacted with the graphite needle 2-1, is matched with the semicircular structure and used for stabilizing signal transmission, and the stator part is installed completely.

The installation of a rotor part, a second central conductor 3-2 is installed in the middle of a second SMA joint 3-5, the outside of the second SMA joint 3-5 is in threaded connection with a rotator 3, an insulator is arranged between the second SMA joint 3-5 and the second central conductor 3-2, a friction part 3-3 is installed on the second central conductor 3-2, two bearings 3-1 fixedly installed with a shell 1 are sleeved at the middle position of the rotator 3, the two bearings 3-1 are adjacently arranged, gaskets 3-9 are respectively arranged on the adjacent contact surfaces of the two bearings 3-1, a fixing nut 3-6 in threaded connection with the rotator 3 is arranged on one side of the bearing 3-1 close to a stator part and used for preventing the bearing 3-1 from loosening, and a press ring 3-7 and an oil seal 3-8 are sequentially arranged on the other side of the bearing 3-1, the sealing performance of the joint is guaranteed, the locking nut 4 which is in threaded connection with the shell 1 is arranged outside the rotor part, and the oil seals 3-8 are in contact with the end face of the locking nut 4, so that the whole structure is more stable, and the whole joint is installed.

The rotor part and the stator part are connected together through two bearings 3-1, and are locked by a locking nut 4 to realize concentric rotation; the contact between the graphite needle 2-1 and the friction member 3-3 completes the signal output by the concentric rotation.

In summary, according to the above technical solution of the present invention, the rotor and the stator are connected by the high precision bearing at the joint, i.e. the assembly gap between the rotating body and the housing, so as to ensure coaxial rotation; the whole structure is compact, and the size of the whole device is reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.