A connection structure of a rotary joint and a conductive slip ring for a turntable

Abstract

A connection structure of a rotary joint and a conductive slip ring for a turntable, comprising a base, a main shaft is installed in the base via a bearing assembly, a motor assembly is installed at the lower end of the main shaft, a rotating frame is fixedly connected to the upper end of the main shaft, a conductive slip ring is installed in the main shaft, a rotary joint is installed at the upper end of the conductive slip ring, the conductive slip ring comprises a slip ring rotor fixedly connected to the main shaft, a slip ring stator is installed in the slip ring rotor, the rotary joint comprises a joint stator fixedly connected to the slip ring stator, a joint rotor is installed in the joint stator, a joint fork fixed in the rotating frame is installed on the joint rotor, a slip ring fork fixed in the base is installed at the lower end of the slip ring stator, and an axial slip ring through hole is provided in the center of the slip ring stator. The present invention can achieve the purpose of keeping the joint stator and the slip ring stator stationary, while the joint rotor and the slip ring rotor continuously rotate with the main shaft and the rotating frame.

Description

Technical Field

[0001] The invention relates to a connection structure of a rotary joint and a conductive slip ring, in particular to a connection structure of a rotary joint and a conductive slip ring for a turntable. Background Art

[0002] In a single-axis or multi-axis turntable device, the device under test is placed on a continuously rotating component. The device under test has two types of cables (signal and power) that need to be connected to the measurement and control cabinet. In order to avoid twisting the cables, two types of rotating connectors, rotating joints and conductive slip rings, are introduced. In terms of structural design, rotating joints and conductive slip rings, whether they are inner rotors or outer rotors, have bearings installed inside to support the rotation of the rotor parts.

[0003] Rotary joints are specialized in transmitting high-frequency signals with a signal frequency of 1 to 18 GHz. Common rotary joints include single-channel and dual-channel ones. Conductive slip rings generally transmit low-frequency or DC signals and can also supply power to user equipment. The general power usage range is 0 to 200 V and 0 to 10 A. However, for power supply needs with large current and voltage, independent power supply slip rings must be specially made to separate strong and weak electricity to avoid interfering with signal cables.

[0004] To transmit signals in both low-frequency and high-frequency bands at the same time, the cable needs to be passed through the conductive slip ring hole. The usual practice is to connect the stator flange of the rotary joint with the base (or bracket), the rotor of the rotary joint with the main shaft, and install a thin cable guide in the main shaft hole. This method is difficult to process, cumbersome to use, and has low reliability. In addition, the rotary joint is installed at the tail of the main shaft, which takes up a large space. Summary of the invention

[0005] The purpose of the present invention is to provide a connection structure of a rotary joint and a conductive slip ring for a turntable to solve the problems in the above-mentioned background technology.

[0006] The technical solution adopted to achieve the above-mentioned purpose is a connection structure of a rotating joint and a conductive slip ring for a turntable, comprising a base, a main shaft is installed in the base via a bearing assembly, a motor assembly is installed at the lower end of the main shaft, a rotating frame is fixedly connected to the upper end of the main shaft, a conductive slip ring is installed in the main shaft, a rotating joint is installed at the upper end of the conductive slip ring, the conductive slip ring comprises a slip ring rotor fixedly connected to the main shaft, a slip ring stator is installed in the slip ring rotor, the rotating joint comprises a joint stator fixedly connected to the slip ring stator, a joint rotor is installed in the joint stator, a joint fork fixed in the rotating frame is installed on the joint rotor, a slip ring fork fixed in the base is installed at the lower end of the slip ring stator, and an axial slip ring through hole is provided in the center of the slip ring stator.

[0007] Furthermore, the joint stator is connected to the slip ring stator via a flange structure, the lower end of the joint stator is connected to a B cable having one end placed in a through hole of the slip ring; the upper end of the joint rotor is connected to an A cable.

[0008] Furthermore, the outer ring of the joint fork is fixedly connected to the rotating frame, a joint square hole is provided at the center position of the joint fork, the joint rotor is a cylindrical structure, and two joint planes are provided on the cylindrical surface of the joint rotor. The joint fork and the joint rotor are fixed to each other through the joint square hole and the two joint planes.

[0009] Furthermore, the outer ring of the slip ring fork is fixedly connected to the base, a slip ring square hole is provided at the center position of the slip ring fork, the slip ring stator is a cylindrical structure, two slip ring planes are provided on the outer cylindrical surface of the slip ring stator, and the slip ring fork and the slip ring stator are fixed to each other through the slip ring square hole and the two slip ring planes.

[0010] Furthermore, the upper end of the slip ring rotor is connected to a slip ring rotor cable, and the lower end of the slip ring stator is connected to a slip ring stator cable.

[0011] Beneficial Effects

[0012] Compared with the prior art, the present invention has the following advantages.

[0013] 1. The present invention connects the rotary joint with the upper end surface of the slip ring stator of the conductive slip ring through a flange structure, shortening the distance from the rotating part to the stationary part of the radio frequency cable, making the overall structure more compact and saving the space at the tail of the main shaft;

[0014] 2. In the present invention, the B cable with one end placed in the slip ring through hole is in a stationary state together with the slip ring stator, without the risk of wear. The A cable connected to the tail of the joint rotor is bound to the rotating frame and rotates together. The overall life depends on the wear life of the rotating joint and the conductive slip ring itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0016] Figure 1 is a front cross-sectional view of the present invention;

[0017] Figure 2 is a top cross-sectional view of the present invention;

[0018] Figure 3 is a cross-sectional view of the conductive slip ring of the present invention;

[0019] Figure 4 is a three-dimensional schematic diagram of a rotary joint in the present invention;

[0020] Figure 5 is a three-dimensional schematic diagram of a conductive slip ring in the present invention;

[0021] Figure 6 It is a structural schematic diagram of the joint fork in the present invention;

[0022] Figure 7 It is a structural schematic diagram of the slip ring fork in the present invention. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with embodiments and drawings.

[0024] like Figure 1-Figure 7 As shown, a connection structure of a rotary joint and a conductive slip ring for a turntable comprises a base 11, a main shaft 6 is installed in the base 11 via a bearing assembly 9, a motor assembly 10 is installed at the lower end of the main shaft, a rotating frame 5 is fixedly connected to the upper end of the main shaft 6, a conductive slip ring 17 is installed in the main shaft 6, a rotary joint 18 is installed at the upper end of the conductive slip ring 17, the conductive slip ring 17 comprises a slip ring rotor 7 fixedly connected to the main shaft 6, a slip ring stator 8 is installed in the slip ring rotor 7, the rotary joint 18 comprises a joint stator 3 fixedly connected to the slip ring stator 8, a joint rotor 2 is installed in the joint stator 3, a joint fork 1 fixed in the rotating frame 5 is installed on the joint rotor 2, a slip ring fork 12 fixed in the base 11 is installed at the lower end of the slip ring stator 8, and an axial slip ring through hole 16 is provided in the center of the slip ring stator 8.

[0025] The joint stator 3 is connected to the slip ring stator 8 via a flange structure. The lower end of the joint stator 3 is connected to a B cable 13 with one end placed in the slip ring through hole 16 ; the upper end of the joint rotor 2 is connected to the A cable 4 .

[0026] The outer ring of the joint fork 1 is fixedly connected to the rotating frame 5, a joint square hole 19 is provided at the center position of the joint fork 1, the joint rotor 2 is a cylindrical structure, and two joint planes 20 are provided on the cylindrical surface of the joint rotor 2. The joint fork 1 and the joint rotor 2 are fixed to each other through the joint square hole 19 and the two joint planes 20.

[0027] The outer ring of the slip ring fork 12 is fixedly connected to the base 11, and a slip ring square hole 21 is provided at the center position of the slip ring fork 12. The slip ring stator 8 is a cylindrical structure, and two slip ring planes 22 are provided on the outer cylindrical surface of the slip ring stator 8. The slip ring fork 12 and the slip ring stator 8 are fixed to each other through the slip ring square hole 21 and the two slip ring planes 22.

[0028] The upper end of the slip ring rotor 7 is connected to a slip ring rotor cable 14 , and the lower end of the slip ring stator 8 is connected to a slip ring stator cable 15 .

[0029] In the present invention, the joint stator 3 and the slip ring stator 8 are fixedly connected by a flange structure, and the joint rotor 2 and the slip ring rotor 7 are indirectly connected together, so that the joint stator 3 and the slip ring stator 8 are stationary, and the joint rotor 2 and the slip ring rotor 7 rotate with the main shaft 6; the slip ring rotor 7 is the outer rotor of the conductive slip ring 17, and the slip ring stator 8 is the inner stator of the conductive slip ring 17; an axial slip ring through hole 16 is designed at the center of the slip ring stator 8; the B cable 13 is connected to the joint stator 3, and the B cable 13 passes through the slip ring through hole 16.

[0030] The present invention installs a rotary joint 18 on the upper end of a conductive slip ring 17. The structure of the conductive slip ring 17 is a structural mode of an outer rotor and an inner stator, and a through hole is opened in the center of the inner stator. The B cable 13 of the rotary joint 18 passes through the slip ring through hole 16; and the joint stator 3 is connected with the slip ring stator 8, and the slip ring stator 8 is restricted from rotating by a slip ring fork 12; the joint fork 1 indirectly fixes the joint rotor 2 and the slip ring rotor 7 together through the rotating frame 5 and the main shaft 6, and the rotation of the main shaft 6 drives the slip ring rotor 7 and the joint rotor 2 to rotate together.

[0031] The working principle of the present invention is to use the base 11 as a support, install the bearing assembly 9 inside the base 11, the main shaft 6 is supported and fixed by the bearing assembly 9, and the main shaft 6 drives the rotating frame 5 to rotate around its own axis; the conductive slip ring 17 is installed in the axial hole of the main shaft 6, and the bearing assembly inside the conductive slip ring 17 limits the slip ring rotor 7 and the slip ring stator 8 to one rotational degree of freedom, that is, the slip ring stator 8 and the slip ring rotor 7 can rotate relative to each other, and the slip ring fork 12 is used to limit the tail of the conductive slip ring 17, so that the working mode of the conductive slip ring 17 is changed to an outer rotor and an inner stator, and the upper end of the slip ring stator 8 is flange-connected with the rotating joint 18, and the tail of the rotating joint 18 is indirectly connected to the main shaft 6 by the joint fork 1, so that the main shaft 6 drives the slip ring rotor 7, the rotating frame 5, the joint fork 1, the joint rotor 2, the slip ring rotor cable 14 and the A cable 4 to rotate together.

[0032] A motor assembly 10 is mounted on the lower end of the main shaft 6 to drive the main shaft 6 to rotate; the outer ring of the slip ring fork 12 is fixed to the base 11, and the slip ring square hole 21 cooperates with the two slip ring planes 22 on the slip ring stator 8 to limit the slip ring stator 8 from rotating around the main shaft 6.

[0033] The A cable 4 is connected to the upper end of the joint rotor 2 through a plug, and the A cable 4 is fixed to the rotating frame 5; in the slip ring through hole 16 of the slip ring stator 8, the lower end of the joint stator 3 is connected to the B cable 13 through a plug, and the other end of the B cable 13 is connected to the socket on the base 11.

[0034] The rotary joint described is a single-channel rotary joint, and is also applicable to a dual-channel rotary joint.

[0035] The connection method of the rotary joint and the conductive slip ring in the axis system described in the present invention can also be extended to the pitch axis system, or the azimuth axis system and the pitch axis system can be used together.

Claims

1. A connection structure of a rotary joint and a conductive slip ring for a turntable, comprising a base (11), characterized in that: A main shaft (6) is installed in the base (11) via a bearing assembly (9), a motor assembly (10) is installed at the lower end of the main shaft, a rotating frame (5) is fixedly connected to the upper end of the main shaft (6), a conductive slip ring (17) is installed in the main shaft (6), a rotating joint (18) is installed at the upper end of the conductive slip ring (17), the conductive slip ring (17) comprises a slip ring rotor (7) fixedly connected to the main shaft (6), a slip ring stator (8) is installed in the slip ring rotor (7), the rotating joint (18) comprises a joint stator (3) fixedly connected to the slip ring stator (8), a joint rotor (2) is installed in the joint stator (3), a joint fork (1) fixed in the rotating frame (5) is installed on the joint rotor (2), a slip ring fork (12) fixed in the base (11) is installed at the lower end of the slip ring stator (8), and an axial slip ring through hole (16) is provided at the center of the slip ring stator (8); The joint stator (3) and the slip ring stator (8) are connected via a flange structure; the lower end of the joint stator (3) is connected to a B cable (13) having one end disposed in a slip ring through hole (16); the upper end of the joint rotor (2) is connected to an A cable (4); The outer ring of the joint fork (1) is fixedly connected to the rotating frame (5); a joint square hole (19) is provided at the center of the joint fork (1); the joint rotor (2) is a cylindrical structure; two joint planes (20) are provided on the cylindrical surface of the joint rotor (2); the joint fork (1) and the joint rotor (2) are fixed to each other through the joint square hole (19) and the two joint planes (20); The outer ring of the slip ring fork (12) is fixedly connected to the base (11); a slip ring square hole (21) is provided at the center of the slip ring fork (12); the slip ring stator (8) is a cylindrical structure; two slip ring planes (22) are provided on the outer cylindrical surface of the slip ring stator (8); the slip ring fork (12) and the slip ring stator (8) are fixed to each other through the slip ring square hole (21) and the two slip ring planes (22).

2. The connection structure of a rotary joint and a conductive slip ring for a turntable according to claim 1, characterized in that: The upper end of the slip ring rotor (7) is connected to a slip ring rotor cable (14), and the lower end of the slip ring stator (8) is connected to a slip ring stator cable (15).

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