CN206892401U - A kind of Multi-path fiber optic rotary joint - Google Patents

Abstract

The utility model discloses a multi-channel optical fiber rotary connector, which comprises a rotating end optical fiber assembly, a fixed end optical fiber assembly, a prism assembly, a bevel gear planetary gear system and a casing, and the rotating end optical fiber assembly includes a magnetically conductive rotating shaft, a first collimator fixing plate, several first optical fiber collimators and magnetic fluid seals, the first optical fiber collimator runs through the first collimator fixing plate, and extends into the inner sleeve, the magnetic conduction shaft is located in the flange, and the flange and the magnetic conduction shaft The gap between them is provided with a magnetic fluid seal and a cover plate, and the outer side of the magnetically conductive rotating shaft is connected with a bearing. The magnetic fluid seal adopted by the utility model does not have the problems of wear and aging, has good sealing effect, and can pass ten cycles of alternating damp heat tests, thereby improving the reliability of the multi-channel optical fiber rotary connector.

Description

A multi-channel optical fiber rotary connector

technical field

The utility model relates to the technical field of optical signal transmission, in particular to a multi-channel optical fiber rotary connector.

Background technique

The optical fiber rotary connector can realize the 360°rotation transmission of the optical signal from the fixed part to the rotating part. Currently, the realization method of the multi-channel optical fiber rotary connector adopts the light transmission principle of the Dove prism and uses different transmission mechanisms. To achieve a 2:1 deceleration, but the environmental adaptability of the optical fiber rotary connector realized by Dove prism is not fully considered. Under hot and humid conditions, dew condensation will appear on the surface of the Dove prism, resulting in the failure of normal transmission of optical signals.

Contents of the invention

In order to improve the environmental adaptability of the multi-channel optical fiber rotary connector and solve the problem of dew condensation on the internal optical devices of the multi-channel optical fiber rotary connector under humid and hot conditions, the utility model proposes a multi-channel optical fiber rotary connector.

A multi-channel optical fiber rotary connector, comprising a rotating end optical fiber assembly, a fixed end optical fiber assembly, a prism assembly, a bevel gear planetary gear train and a housing, the prism assembly is located between the rotating end optical fiber assembly and the fixed end optical fiber assembly Between, including the inner sleeve and the Dove prism located in the inner sleeve; the bevel gear planetary gear train, including two large bevel gears, at least one small bevel gear, small bearings, springs and screws, the two bevel gears The large bevel gear is connected to the outer ring of the large bearing, the small bevel gear is connected to the outer ring of the small bearing, the inner ring of the small bearing is connected to the shaft, and the position is limited by a spring and a screw. The gear and the bevel pinion are meshed through the tooth surface; the fixed-end fiber optic assembly includes a second collimator fixing plate and a number of second fiber collimators, and the second fiber collimator runs through the second collimator The device fixing plate extends into the inner sleeve; the outer shell covers the prism assembly, the bevel gear planetary gear train and the fixed-end optical fiber assembly, including a flange and a housing; it is characterized in that: The optical fiber assembly at the rotating end includes a magnetically conductive rotating shaft, a first collimator fixing plate, several first fiber collimators and a magnetic fluid seal. The first fiber collimators pass through the first collimator fixing plate and extend into In the inner sleeve, the magnetically conductive rotating shaft is located in the flange, the gap between the flange and the magnetically conductive rotating shaft is provided with a magnetic fluid seal, and a cover plate is provided, and the outer side of the magnetically conductive rotating shaft Connected to the bearing.

The prism assembly also includes a stop nut, a nut, an inner shaft and a shaft, the stop nut and the nut are threadedly connected with the inner shaft, and withstand the inner ring of the large bearing on the inner shaft, the The Dove prism is bonded in the inner sleeve, connected with the stop nut through screws, and the shaft is installed in the hole of the inner shaft.

The Dove prism is bonded horizontally in the inner sleeve.

The magnetic fluid seal adopted by the utility model does not have the problems of wear and aging, has good sealing effect, and can pass ten cycles of alternating damp heat tests, thereby improving the reliability of the multi-channel optical fiber rotary connector.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of a multi-channel optical fiber rotary connector;

Explanation of reference signs:

1—flange, 2—magnetic fluid seal, 3—magnetic shaft, 4—the first optical fiber collimator, 5—the first collimator fixing plate, 6—the first bearing end cover, 7—inner sleeve, 8—stop nut, 9—large bearing, 10—large bevel gear, 11—small bevel gear, 12—spring, 13—small bearing, 14—screw, 15—shaft, 16—ring, 17—shell, 18— Second bearing end cover, 19—nut, 20—outlet end cover, 21—second collimator fixing plate, 22—second fiber collimator, 23—Dove prism, 24—inner shaft, 25—bearing, 26—cover plate.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, this embodiment is divided into four components and housings, namely the rotating end fiber optic component, the fixed end fiber optic component, the prism component and the bevel gear planetary gear train, wherein the prism component is located between the rotating end fiber optic component and the fixed end fiber optic component Between, including the inner sleeve 7, the Dove prism 23, the Dove prism 23 is glued horizontally in the inner sleeve 7, and also includes the stop nut 8, the nut 19, the inner shaft 24 and the shaft 15, the stop nut 8 and the nut 19 and the inner shaft 24 are threadedly connected to withstand the inner ring of the large bearing 9 on the inner shaft 24, the Dove prism 23 is bonded in the inner sleeve 7, and is connected with the stop nut 8 through the screw 14, and the shaft 15 is installed on In the bore of the inner shaft 24. The optical fiber assembly at the rotating end is located outside the housing, and is composed of a magnetic rotating shaft 3, a first optical fiber collimator 4 and a first collimator fixing plate 5. The magnetic rotating shaft 3 is located inside the flange 1, and the outer part is composed of a bearing 25. A ferrofluid seal 2 is arranged at the junction of the blue 1 and the magnetically conductive rotating shaft 3, and a cover plate 26 is arranged outside. The fiber assembly includes a second collimator fixing plate 21 and several second fiber collimators 22, the second fiber collimator 22 runs through the second collimator fixing plate 21 and extends into the inner sleeve 7; the bevel gear planetary wheel The system comprises two large bevel gears 10, at least one small bevel gear 11, a small bearing 13, springs and screws, the two large bevel gears 10 are connected with the outer ring of the large bearing 9, and the small bevel gear 11 is connected with the outer ring of the small bearing 13, The inner ring of the small bearing 13 is connected with the shaft 15, and the position is limited by a spring and a screw, and the large bevel gear 10 and the small bevel gear 11 are meshed through the tooth surfaces.

In this embodiment, the magnetic fluid seal 2 is used to replace the rotating seal, and the magnetic rotating shaft 3 is used to replace the ordinary rotating shaft. At the same time, a bearing 25 and a cover plate 26 are added to meet the coaxiality requirements of the magnetic fluid seal 2 .

The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims (3)

1. a kind of Multi-path fiber optic rotary joint, including turning end optical fiber component, fixing end optical fiber component, prism assemblies, cone tooth Take turns planetary gear train and shell, the prism assemblies between the turning end optical fiber component and the fixing end optical fiber component, Dove prism including inner sleeve and in the inner sleeve；The bevel gear planetary gear train, including two bevel gear wheels, extremely Few a bevel pinion, small bearing, spring and screw, two bevel gear wheels are connected with big bearing outer ring, the small bevel gear Wheel is connected with the small bearing outer ring, and the small bearing inner race is connected with axle, spacing by spring and screw, the bevel gear wheel And the bevel pinion passes through flank engagement；The fixing end optical fiber component includes the second collimater fixed plate and some second light Fine collimater, second optical fiber collimator run through the second collimater fixed plate, stretched into the inner sleeve；The shell Cover on the prism assemblies, bevel gear planetary gear train and the fixing end optical fiber component surrounding, including flange and housing；Its feature It is：The turning end optical fiber component includes magnetic rotating shaft, first collimator fixed plate, some first optical fiber collimators and magnetic current Body seals, and first optical fiber collimator runs through the first collimator fixed plate, stretched into the inner sleeve, and the magnetic conduction turns Axle position is provided with magnet fluid sealing in flange at the gap between the flange and the magnetic rotating shaft, and sets cover plate, described to lead Connect on the outside of magnetic rotating shaft for bearing.

2. fiber rotation connector according to claim 1, it is characterised in that：The prism assemblies also include stop spiral shell Mother, nut, interior axle and axle, the retainer nut and the nut are connected through a screw thread with the interior axle, are withstood in the interior axle Big bearing inner race, the Dove prism is bonded in the inner sleeve, is connected by screw with the retainer nut, the axle In the hole of the interior axle.

3. fiber rotation connector according to claim 1 or 2, it is characterised in that：The Dove prism level is bonded in In the inner sleeve.