Pin roller ball contact type radio frequency slip ring

Abstract

According to the technical scheme, the roller ball contact type radio frequency slip ring comprises a flange and a shell, the shell is located on one side of the flange, a center cylinder is arranged at the center of the flange, a center shaft is fixed to the center position in the center cylinder, a rotor assembly is arranged on the center shaft, and the rotor assembly is connected with the shell. A ball supporting ring located on the center shaft is arranged on the side, away from the flange, of the rotor assembly, a plurality of graphite balls are arranged on the ball supporting ring at equal angles, a stator assembly located on the center shaft is arranged at the center position in the shell, and the stator assembly and the rotor assembly are located on the two sides of the ball supporting ring respectively. The two ends of the graphite balls protrude out of the ball supporting rings and do circular motion along the stator assembly and the rotor assembly respectively. Point contact is achieved through the reliable and stable contact mode of the multi-point graphite balls and the pin rollers, the contact area is reduced, so that friction force is reduced, abrasion resistance is improved, and the service life of a product is prolonged through the stable friction coefficient.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency slip rings, and specifically relates to a roller ball contact type radio frequency slip ring. Background Art

[0002] A radio frequency slip ring, also known as an RF slip ring, is a rotating connection device that can simultaneously transmit power and signals. Different from traditional mechanical slip rings, radio frequency slip rings adopt advanced designs and can work under high-frequency signals without affecting the signal quality. This characteristic has enabled it to be widely used in many fields with high-precision requirements.

[0003] Currently, the contact type radio frequency slip rings on the market all adopt the form of elastic sheet contact. The elastic sheet applies pressure to the raceway through its own elastic force value to meet the transmission function of radio frequency signals. Its elastic index is difficult to control, and the rotational wear is unstable, which accelerates the wear of the elastic sheet itself and the raceway, resulting in a short service life of the product. With the rapid development of current market applications, the existing traditional contact type radio frequency slip rings can no longer meet the usage requirements. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a roller ball contact type radio frequency slip ring.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A roller ball contact type radio frequency slip ring includes a flange and a housing. The housing is located on one side of the flange. A central cylinder is provided at the center of the flange. A central shaft is fixed at the central position inside the central cylinder. A rotor assembly is arranged on the central shaft. A ball bearing support ring is arranged on the central shaft on the side of the rotor assembly away from the flange. A number of graphite balls are equiangularly arranged on the ball bearing support ring. The housing is penetrated by the central shaft, and a stator assembly is arranged at the central position inside the housing on the central shaft. The stator assembly and the rotor assembly are respectively located on both sides of the ball bearing support ring, and both ends of the graphite balls protrude from the ball bearing support ring and respectively make circular motions along the stator assembly and the rotor assembly.

[0007] Preferably, the rotor assembly includes a rotor dielectric support ring, and a rotor transmission raceway ring connected to a number of graphite balls in a rotating manner is welded to the side of the rotor dielectric support ring close to the ball bearing support ring. The stator assembly includes a stator dielectric support ring, and a stator transmission raceway ring connected to a number of graphite balls in a rotating manner is welded to the side of the stator dielectric support ring close to the ball bearing support ring.

[0008] Preferably, a limit ring fixed on the housing is arranged on the periphery of the stator dielectric support ring, and the outer diameter of the limit ring is equal to the inner diameter of the central cylinder.

[0009] Preferably, a plurality of rotatable rollers are equidistantly arranged on the inner wall of the center cylinder on the side away from the flange and on the inner wall of the housing at the contact with the central axis. The rollers are tangent to the housing and the center cylinder, and the rollers are located between the inner diameter and the outer diameter of the center cylinder and the housing at the contact with the central axis.

[0010] Preferably, lubricating grease is applied to both the rollers and the graphite balls.

[0011] Preferably, bearings located outside the center cylinder are provided on one side of the flange close to the housing and inside the housing, and the two bearings are arranged correspondingly.

[0012] Preferably, connectors for connecting the center cylinder and the housing are provided at corresponding positions of the center cylinder and the housing.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The present utility model realizes point contact through a reliable and stable contact method of multiple graphite balls and rollers, reduces the contact area, thereby reducing the friction force, improves the wear resistance, and further increases the service life of the product through a stable friction coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings, the same reference numerals are used to refer to the same components.

[0016] Among them:

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the flange structure of the present utility model;

[0019] Figure 3 is a schematic diagram of the housing structure of the present utility model;

[0020] Figure 4 is a schematic diagram of the ball support ring structure of the present utility model.

[0021] The reference numerals in the drawings are explained as follows: 1. Flange; 2. Housing; 3. Connector; 4. Bearing; 5. Center cylinder;

[0022] 6. Central axis; 7. Ball support ring; 8. Rotor medium support ring; 9. Rotor transmission raceway ring; 10. Roller;

[0023] 11. Stator medium support ring; 12. Stator transmission raceway ring; 13. Bearing retainer ring; 14. Graphite ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] It is easy to understand that according to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various interchangeable structural forms and implementation manners. Therefore, the following specific embodiments and the accompanying drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as all of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0025] As Figure 1 shown, as a roller ball contact type radio frequency slip ring of the present utility model, it includes a flange 1. As Figure 2 shown, a central cylinder 5 is provided at the center of the flange 1. A central shaft 6 is fixed at the central position inside the central cylinder 5. A rotor dielectric support ring 8 is provided on one side of the central shaft 6 close to the flange 1. A rotor transmission raceway ring 9 located on the central shaft 6 is welded to the side of the rotor dielectric support ring 8 away from the flange 1. A housing 2 is provided on one side of the central shaft 6 away from the flange 1. The housing 2 is penetrated by the central shaft 6. A stator dielectric support ring 11 is provided on the central shaft 6 inside the housing 2. As Figure 3 shown, a stator transmission raceway ring 12 located on the central shaft 6 is welded to the side of the stator dielectric support ring 11 close to the rotor transmission raceway ring 9. A ball support ring 7 located on the central shaft 6 is provided between the stator transmission raceway ring 12 and the rotor transmission raceway ring 9. As Figure 4 shown, a plurality of graphite balls 14 are equiangularly arranged on the ball support ring 7, and both ends of the graphite balls 14 protrude from the ball support ring 7 and move in a circular motion along the stator assembly and the rotor assembly respectively. The stator transmission raceway ring 12 and the rotor transmission raceway ring 9 are in contact and roll to transmit radio frequency signals through the graphite balls 14. By the point contact method between the rotor assembly composed of the rotor dielectric support ring 8 and the rotor transmission raceway ring 9 and the stator assembly composed of the stator dielectric support ring 11 and the stator transmission raceway ring 12 with the graphite balls 14, the contact area is reduced, thereby reducing the friction force and improving the wear resistance. Furthermore, the service life of the product is increased by a stable friction coefficient.

[0026] As Figure 2-3As shown, limiting rings are provided both inside the housing 2 and the central cylinder 5, which are respectively located outside the stator dielectric support ring 11 and the rotor dielectric support ring 8. The outer diameter of the limiting ring is equal to the inner diameter of the central cylinder 5. A number of rotatable rollers 10 are equidistantly arranged on the inner wall of the central cylinder 5 on the side away from the flange 1 and on the inner wall of the housing 2 at the contact position with the central shaft 6. The rollers 10 are tangent to the housing 2 and the central cylinder 5, and the rollers 10 are located between the inner diameter and the outer diameter of the central cylinder 5 and the contact position of the housing 2 with the central shaft 6. The outer conductor forms a transmission signal cavity by rolling contact with the housing 2 and the central cylinder 5 through the rollers 10. The contact area is reduced by the point contact method between the central shaft 6 and the housing 2 and between the limiting ring inside the housing 2 and the central cylinder 5, thereby reducing the friction force, improving the wear resistance, and further increasing the service life of the product through a stable friction coefficient.

[0027] Conductive lubricating grease is applied to both the rollers 10 and the graphite balls 14 to further improve the wear resistance of the product. The housing 2 is located on one side of the flange 1. On the side of the flange 1 close to the housing 2 and inside the housing 2, bearings 4 are provided corresponding to each other and located outside the central cylinder 5. An bearing retaining ring 13 is also provided inside the housing 2 on the side of the bearing 4 inside the housing 2 away from the bearing 4 on the flange 1. The rotor and the stator perform forward and reverse rotation functions through the two end bearings 4, and at the same time are positioned through the bearings 4, which is beneficial to the installation work. Connectors 3 are provided at the corresponding positions of the central cylinder 5 and the housing 2. The connectors 3 are used to connect the central cylinder 5 and the housing 2 to ensure the stability of the product.

[0028] During use, first weld the rotor transmission raceway ring 9 to the rotor dielectric support ring 8, then fix the assembly to the central shaft 6. Secondly, weld the stator transmission raceway ring 12 to the stator dielectric support ring 11, then fix the assembly to the housing 2. Install the rollers 10 on the positioning posts distributed on the central cylinder 5 and the housing 2. Apply conductive lubricating grease to all contact surfaces, the rollers 10, and the graphite balls 14. Install all the components in a laminated installation method according to the assembly sequence. Position the stator and rotor assemblies in the form of the upper and lower two bearings 4. Place the ball support ring 7 assembly on the rotor transmission raceway ring 9 on the central shaft 6. Install the stator assembly, and tighten and test the rotation operation to ensure the concentricity index. Finally, perform index detection and running-in of the rotation work;

[0029] After installation, the rotor and the stator perform forward and reverse rotation functions through the two end bearings 4. The stator transmission raceway ring 12 and the rotor transmission raceway ring 9 transmit radio frequency signals through rolling contact with the graphite balls 14. The outer conductor forms a transmission signal cavity by rolling contact with the central shaft 6 through the rollers 10. The general working state is that the stator is fixed and the rotor is rotated in a rotating form;

[0030] Replace the contact method of the old elastic piece with a roller 10 and a graphite ball 14. Through a reliable and stable multi-point contact of the graphite balls 14 and a wear-resistant layer of conductive lubricating grease applied on the surface of the contact roller 10. At the same time, the hard gold plating layer on the contact surface of the rotor transmission loop is relatively thickened synchronously. When rotating, the stability of the low friction coefficient during rotation is achieved by the multi-point contact of the self-lubricating graphite balls 14 and the graphite rollers 10, so as to achieve the purposes of small contact resistance, stable friction coefficient and flexible placement space, etc., meeting the requirements of products with a compact height space and high life requirements.

[0031] The technical scope of the present utility model is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications should all fall within the protection scope of the present utility model.

Claims

1. A roller ball contact type radio frequency slip ring, characterized in that: It includes a flange (1) and a housing (2). The housing (2) is located on one side of the flange (1). A central cylinder (5) is provided at the center of the flange (1). A central shaft (6) is fixedly installed at the central position inside the central cylinder (5). A rotor assembly is arranged on the central shaft (6). A ball support ring (7) is arranged on the central shaft (6) on the side of the rotor assembly away from the flange (1). A number of graphite balls (14) are arranged at equal angles on the ball support ring (7). The housing (2) is penetrated by the central shaft (6), and a stator assembly is arranged on the central shaft (6) at the central position inside the housing (2). The stator assembly and the rotor assembly are respectively located on both sides of the ball support ring (7), and both ends of the graphite balls (14) protrude from the ball support ring (7) and respectively perform circular motion along the stator assembly and the rotor assembly.

2. The roller ball contact type radio frequency slip ring according to claim 1, wherein: The rotor assembly includes a rotor medium support ring (8), and a rotor transmission raceway ring (9) rotatably connected to a number of graphite balls (14) is welded to the side of the rotor medium support ring (8) close to the ball support ring (7). The stator assembly includes a stator medium support ring (11), and a stator transmission raceway ring (12) rotatably connected to a number of graphite balls (14) is welded to the side of the stator medium support ring (11) close to the ball support ring (7).

3. The roller ball contact type radio frequency slip ring according to claim 2, wherein: A limit ring fixed to the housing (2) is arranged on the periphery of the stator medium support ring (11), and the outer diameter of the limit ring is equal to the inner diameter of the central cylinder (5).

4. The roller ball contact type radio frequency slip ring according to claim 3, characterized in that: A number of rotatable rollers (10) are arranged at equal distances on the inner wall of the side of the central cylinder (5) away from the flange (1) and on the inner wall of the contact position between the housing (2) and the central shaft (6). The rollers (10) are tangent to the housing (2) and the central cylinder (5), and the inner and outer diameters of the rollers (10) at the contact positions between the central cylinder (5) and the housing (2) and the central shaft (6) are located between the inner and outer diameters.

5. The roller ball contact type radio frequency slip ring according to claim 4, wherein: Lubricating grease is applied to both the rollers (10) and the graphite balls (14).

6. A roller ball contact type radio frequency slip ring according to claim 1, characterized in that: Bearings (4) are arranged on the side of the flange (1) close to the housing (2) and inside the housing (2) around the central cylinder (5), and the two bearings (4) are arranged correspondingly.

7. The roller ball contact type radio frequency slip ring according to claim 6, characterized in that: Connectors (3) for connecting the central cylinder (5) and the housing (2) are arranged at the corresponding positions of the central cylinder (5) and the housing (2).

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