A variable aperture composite rotary transmission device

Abstract

The present invention belongs to the technical field of electric rotation transmission, and specifically relates to a variable aperture type composite rotation transmission device. The present invention comprises a combined bracket, a flange fixed at the end of the combined bracket, a ring body assembly coaxially arranged with the output shaft of the flange, a brush assembly arranged on the combined bracket, and an optical fiber slip ring arranged inside the ring body assembly through a connecting block; the ring body assembly is arranged inside the combined bracket; the ring body assembly comprises a central axis, a lead end axis fixed at the lead end of the central axis, and a casting end axis fixed at the casting end of the central axis; a first ring piece and a second ring piece are arranged on the central axis in sequence. The present invention adopts a hollow variable aperture axis as the central axis, and ring pieces of different diameters are arranged on the outside of the central axis to realize the transmission of multiple electrical signals and electrical power. The optical fiber slip ring is arranged in the aperture of the central axis, which can not only meet the requirements of installation and use in a small space, but also realize the function of simultaneously transmitting electrical signals, optical signals and electrical power.

Description

Technical Field

[0001] The invention belongs to the technical field of electric rotation transmission, and in particular relates to a variable aperture type composite rotation transmission device. Background Art

[0002] The electric rotary transmission device is a precision power transmission rotary transmission device composed of a multi-loop rolling friction pair structure composed of rotors, stators, structural supports, bearings, etc., which is axially superimposed. It can realize the transmission of power and signals between two devices that can rotate freely 360° relative to each other. It is mainly used in systems that require signal rotational electrical transmission in the fields of aviation, aerospace, navigation, weapons, wind power, etc.

[0003] With the rapid development of rotational transmission technology, the types of transmission signals have gradually evolved into electrical signals and optical signals. Traditional electrical rotational transmission devices are gradually unable to meet the increasing demand for transmission signal types. There is an urgent need for a composite rotational transmission device that can transmit multiple signals simultaneously.

[0004] Compared with the traditional electric rotation transmission device, a variable aperture composite rotation transmission device can realize the simultaneous transmission of optical signals, electrical signals and electrical power. The variable aperture composite rotation transmission device disclosed in the present invention has the characteristics of being able to transmit light, electrical signals and electrical power at the same time, and can adapt to the working conditions where the transmission signals are electrical signals and optical signals. Summary of the invention

[0005] The purpose of the present invention is to overcome the defect of the prior art that optical signals, electrical signals and electric power signals cannot be transmitted simultaneously, and to provide a variable aperture type composite rotating transmission device that uses a novel variable aperture structure layout method to meet the installation space limitations and can realize the simultaneous transmission of optical signals, electrical signals and electric power.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A variable aperture composite rotary transmission device comprises a combined bracket, a flange fixed at the end of the combined bracket, a ring assembly coaxially arranged with the output shaft of the flange, a brush assembly arranged on the combined bracket, and an optical fiber slip ring arranged inside the ring assembly through a connecting block; the ring assembly is arranged inside the combined bracket;

[0008] The ring body assembly comprises a central axis, a lead end axis fixed to the lead end of the central axis, and a casting end axis fixed to the casting end of the central axis; a first ring piece and a second ring piece are sequentially arranged on the outer side of the central axis;

[0009] The lead end shaft is coaxially arranged with the output shaft of the flange; the central shaft is a hollow variable aperture shaft, the aperture of the lead end of the central shaft is smaller than the aperture of the casting end of the central shaft; the optical fiber slip ring is arranged in the hole of the central shaft.

[0010] Furthermore, the brush group includes a first brush assembly arranged on the central axis close to the lead end axis and a second brush assembly arranged on the central axis close to the casting end axis.

[0011] Furthermore, the brush wires of the first brush assembly are located in the V-shaped grooves of the first ring segment; and the brush wires of the second brush assembly are located in the V-shaped grooves of the second ring segment.

[0012] Furthermore, the optical fiber slip ring is fixed on the combined bracket by means of a toggle stud.

[0013] Furthermore, the lead end shaft, the central shaft, the first ring piece, the second ring piece and the casting end shaft are all fixed by vacuum casting epoxy glue.

[0014] Furthermore, the ring body assembly and the combined bracket are rotatably connected via a bearing.

[0015] Furthermore, an outer cover is arranged on the outer side of the combined bracket.

[0016] The beneficial effects of a variable aperture composite rotary transmission device of the present invention are:

[0017] 1. The present invention adopts a hollow variable aperture shaft as the central axis, and ring pieces of different diameters are arranged on the outside of the central axis to realize the transmission of multiple electrical signals and electrical power. The optical fiber slip ring is arranged in the aperture of the central axis, which can not only meet the requirements of installation and use in a small space, but also realize the function of simultaneously transmitting electrical signals, optical signals and electrical power.

[0018] 2. The optical fiber slip ring of the present invention is arranged in the aperture of the central axis and does not contact the inner wall of the central axis, which can effectively avoid the wear of the optical fiber slip ring while reducing the installation space and enhance the service life of the optical fiber slip ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 is a stereogram of an embodiment of the present invention;

[0021] Figure 2 It is a partial structural schematic diagram of an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the internal structure of an embodiment of the present invention;

[0023] Figure 4 is a cross-sectional view of an embodiment of the present invention;

[0024] Figure 5 yes Figure 4 A detailed view of the first ring segment and the first brush assembly portion;

[0025] Figure 6 yes Figure 4 A detailed view of the second ring piece and the second brush assembly portion;

[0026] Figure 7 is a cross-sectional view of a ring assembly according to an embodiment of the present invention;

[0027] Figure 8 is a cross-sectional view of the central axis of an embodiment of the present invention;

[0028] Fig. 9 It is a cross-sectional view of a combined bracket according to an embodiment of the present invention.

[0029] In the figure: 1. combined bracket, 2. flange, 3. ring body assembly, 31. center axis, 32. lead end axis, 33. casting end axis, 34. first ring piece, 35. second ring piece, 4. brush assembly, 41. first brush member, 42. second brush member, 5. optical fiber slip ring, 6. toggle stud, 71. first bearing, 72. second bearing, 8. outer cover, 9. first bearing end cover, 10. second bearing end cover, 11. connecting block. DETAILED DESCRIPTION

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0031] like Figure 1-Figure 9 The specific embodiment of a variable aperture composite rotary transmission device of the present invention shown comprises a combined bracket 1, a flange 2 fixed at the end of the combined bracket 1, a ring body assembly 3 coaxially arranged with the output shaft of the flange 2, a brush assembly 4 arranged on the combined bracket 1, and an optical fiber slip ring 5 arranged inside the ring body assembly 3 through a connecting block 11; the ring body assembly 3 is arranged inside the combined bracket 1; the ring body assembly 3 comprises a central axis 31, a lead end axis 32 fixed at the lead end of the central axis 31, and a casting end axis 33 fixed at the casting end of the central axis 31; a first ring piece 34 and a second ring piece 35 are sequentially arranged on the outside of the central axis 31; wherein the lead end axis 32 is coaxially arranged with the output shaft of the flange 2; the central axis 31 is a hollow variable aperture axis, and the aperture of the lead end of the central axis 31 is smaller than the aperture of the casting end of the central axis 31; the optical fiber slip ring 5 is arranged in the hole of the central axis 31. Refer to Figure 4 , Figure 7 as well as Figure 8 The central axis 31 is a variable aperture axis, the middle of which is hollowed out to form a closed cavity.

[0032] The ring body assembly 3 of the embodiment of the present invention is formed by using a special casting tool to press the lead end shaft 32, the central shaft 31, the first ring piece 34, the second ring piece 35 and the casting end shaft 33 into a mold. Figure 7 It is placed in the position shown, and then epoxy glue is poured by vacuum casting and cured at high temperature.

[0033] like Fig. 9 The combined bracket 1 shown in the figure uses a variable diameter structure, and a threaded hole is opened on the inner wall of the combined bracket 1 for installing the brush assembly 4. Figure 5 and Figure 6 As shown, the brush assembly 4 includes a first brush assembly 41 disposed on the central axis 31 close to the lead end axis 32 and a second brush assembly 42 disposed on the central axis 31 close to the casting end axis 33. The brush wires of the first brush assembly 41 are located in the V-shaped groove of the first ring piece 34; the brush wires of the second brush assembly 42 are located in the V-shaped groove of the second ring piece 35, so as to realize the contact between the ring body assembly 3 and the brush assembly 4. The brush assembly 4 is a prior art and will not be described in detail herein.

[0034] The ring body component 3 and the combined bracket 1 are rotatably connected via bearings. Bearings are installed at both ends of the ring body component 3 that contact the combined bracket 1 to prevent the combined bracket 1 from rotating when the ring body component 3 rotates.

[0035] The outer side of the combined bracket 1 of the embodiment of the present invention is provided with an outer cover 8, which ensures the cleanliness of the interior on the one hand, and prevents the interference of the outside world on the whole device on the other hand.

[0036] The installation method of the device of the embodiment of the present invention is to first arrange the ring body component 3 in the combined bracket 1, and keep the coaxiality of the two less than 0.02mm through precise installation means. The optical fiber slip ring 5 is arranged in the ring body component 3 through the connecting block 11, and it is fixed to the connecting block 11 and the rotating end of the optical fiber slip ring 5 by screws. The first brush assembly 41 and the second brush assembly 42 are installed on the combined bracket 1 by screws. The brush wire of the first brush assembly 41 should be located in the V-shaped groove of the first ring piece 34 of the ring body component 3 through debugging, and the brush wire of the second brush assembly 42 should be located in the V-shaped groove of the second ring piece 35 of the ring body component 3 through debugging. The two bearings are respectively placed in the bearing positions at both ends of the combined bracket 1, and the first bearing end cover 9 is connected to the combined bracket 1 by screws, and the outer ring of the first bearing 71 is pre-tightened. The second bearing end cover 10 is connected to the lead end shaft 32 of the ring body component 3 by screws, and the inner ring of the second bearing 72 is pre-tightened, and then the outer cover 8 is installed on the combined bracket 1 by screws.

[0037] The working principle of the embodiment of the present invention is that the flange 2 is driven to rotate by an external driving force, and the flange 2 transmits the driving force to the lead end shaft 32 through the screws, so that the ring body assembly 3 rotates. When the ring body assembly 3 rotates, the rotating end of the optical fiber slip ring 5 arranged in the aperture of the central axis 31 and fixed to the combined bracket 1 by turning the stud 6 rotates therewith. During the rotation process, the ring body assembly 3 generates sliding friction with the brush wires of the first brush assembly 41 and the second brush assembly 42 arranged on the combined bracket 1, thereby realizing the transmission of electrical signals and electrical power. The optical fiber slip ring 5 is arranged inside the ring body assembly 3, and the stator of the optical fiber slip ring 5 is fixed by turning the stud 6, and the optical fiber slip ring 5 is fixed to the connecting block 11 by screws. When the ring body assembly 3 rotates, the connecting block 11 is driven to rotate, and the connecting block 11 drives the rotor end of the optical fiber slip ring 5 to rotate through the screws, thereby realizing the transmission of optical signals during the rotation process.

[0038] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A variable aperture composite rotary transmission device, characterized in that: It comprises a combined bracket (1), a flange (2) fixed at the end of the combined bracket (1), a ring assembly (3) coaxially arranged with the output shaft of the flange (2), a brush assembly (4) arranged on the combined bracket (1), and an optical fiber slip ring (5) arranged inside the ring assembly (3) via a connecting block (11); the ring assembly (3) is arranged inside the combined bracket (1); The ring body assembly (3) comprises a central axis (31), a lead end axis (32) fixed to a lead end of the central axis (31), and a casting end axis (33) fixed to a casting end of the central axis (31); a first ring piece (34) and a second ring piece (35) are sequentially arranged on the outer side of the central axis (31); The lead end shaft (32) is coaxially arranged with the output shaft of the flange (2); the central shaft (31) is a hollow variable-aperture shaft, and the aperture of the lead end of the central shaft (31) is smaller than the aperture of the casting end of the central shaft (31); the optical fiber slip ring (5) is arranged in the hole of the central shaft (31); The brush assembly (4) comprises a first brush assembly (41) arranged on the central axis (31) close to the lead end axis (32) and a second brush assembly (42) arranged on the central axis (31) close to the casting end axis (33); The brush wires of the first brush assembly (41) are located in the V-shaped groove of the first ring piece (34); and the brush wires of the second brush assembly (42) are located in the V-shaped groove of the second ring piece (35); The optical fiber slip ring (5) is fixed on the combined bracket (1) by means of a toggle screw (6); The lead end shaft (32), the central shaft (31), the first ring piece (34), the second ring piece (35) and the casting end shaft (33) are all fixed by vacuum casting epoxy glue.

2. The variable aperture composite rotary transmission device according to claim 1, characterized in that: The ring body assembly (3) and the combined bracket (1) are rotatably connected via a bearing.

3. A variable aperture composite rotary transmission device according to claim 1 or 2, characterized in that: An outer cover (8) is arranged on the outer side of the combined bracket (1).

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