A stacked ultra-micro pitch precision conductive slip ring mandrel

Abstract

The invention discloses a stacked ultra-macro precision conductive slip ring mandrel, comprising a support shaft and an insulating sleeve, wherein a mounting plate is provided at one end of the support shaft, a plurality of long strip grooves are provided on the support shaft, a plurality of glue injection ports are provided on the back of the mounting plate, a cylindrical boss is provided on the front of the mounting plate, the insulating sleeve is composed of a plurality of insulating plates, the cross section of the insulating plates is arc-shaped, an insulating retaining ring is provided at one end of the insulating sleeve, an opening is formed between adjacent insulating plates, the long strip grooves and the corresponding openings constitute a glue injection cavity, a plurality of insulating rings and a plurality of conductive rings are sleeved on the insulating sleeve, the insulating rings and the conductive rings are alternately arranged in sequence, and the glue injection cavity is filled with cured glue. The mandrel of the invention adopts a stacked structure, is easy to process and produce, reduces the generation of defects such as cracks, looseness or bubbles, improves the yield rate of the ultra-macro mandrel, and is suitable for making ultra-macro precision conductive slip rings.

Description

Technical Field

[0001] The invention belongs to the technical field of conductive slip rings, and in particular relates to a stacked ultra-micro pitch precision conductive slip ring core shaft. Background Art

[0002] At present, ultra-micro pitch precision conductive slip rings are widely used in key parts of certain equipment in the high-end field of military aerospace, and are used to transmit precision signals, weak currents, signal combination solutions (such as video, control, sensing, Ethernet, power supply, etc.). As military aerospace equipment tends to be more lightweight and miniaturized, the axial and radial installation space reserved for conductive slip rings in the equipment is also getting smaller and smaller, which requires the conductive slip rings to have smaller and smaller dimensions.

[0003] The core shaft is an important part of the conductive slip ring, which mainly includes a support shaft, an insulating ring, a conductive ring, etc. The structure of the existing core shaft is difficult to adapt to the design requirements of the ultra-micro precision conductive slip ring. When its size is proportionally reduced to the design requirements of the ultra-micro precision conductive slip ring, there are problems such as difficult processing, low yield rate, and high production cost. Therefore, it is necessary to design a core shaft with a small diameter, thin thickness, and a small distance between conductive rings that can meet the use requirements of ultra-micro precision conductive slip rings. Summary of the invention

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a stacked ultra-micro precision conductive slip ring core shaft, including a support shaft and an insulating sleeve sleeved on the support shaft, a mounting plate is provided at one end of the support shaft, the support shaft is fixedly connected to the middle of the front of the mounting plate, a plurality of long strip grooves are provided on the support shaft, the length direction of the long strip grooves is parallel to the length direction of the support shaft, a plurality of injection ports respectively connected to the long strip grooves are provided on the back of the mounting plate, a cylindrical boss is provided on the front of the mounting plate, the cylindrical boss is coaxial with the support shaft, and the insulating sleeve is provided on the back of the mounting plate. The sleeve is composed of a plurality of insulating plates arranged in a circle around the axis of the support shaft. The cross-section of the insulating plate is arc-shaped. An insulating retaining ring is provided at one end of the insulating sleeve. One end of the insulating plate is fixedly connected to the insulating retaining ring. The insulating sleeve is sleeved on the support shaft. The insulating retaining ring is against the cylindrical boss. An opening is formed between adjacent insulating plates. The opening corresponds to the long strip groove one by one. The long strip groove and the corresponding opening constitute a glue injection cavity. A plurality of insulating rings and a plurality of conductive rings are sleeved on the insulating sleeve. The insulating rings and the conductive rings are alternately arranged in sequence. The glue injection cavity is filled with cured glue.

[0005] As a preferred embodiment of the above technical solution, there are two elongated grooves, and the two elongated grooves are arranged opposite to each other.

[0006] As a preferred embodiment of the above technical solution, an annular groove with a V-shaped cross-section is provided on the outer circumferential surface of the conductive ring, and the annular groove is coaxial with the conductive ring.

[0007] As a preferred embodiment of the above technical solution, the distance between adjacent conductive rings is less than 0.1 mm.

[0008] As a preferred embodiment of the above technical solution, the glue is epoxy resin glue.

[0009] As a preferred embodiment of the above technical solution, the support shaft is made of sus316L steel, the insulating sleeve is made of polysulfone, the conductive ring is made of H62 brass gold-plated material, and the insulating ring is made of PI polyimide plastic.

[0010] The beneficial effects of the present invention are as follows: the mandrel of the present invention adopts a stacking structure, is easy to process and produce, and is convenient for glue injection, which is conducive to the production and assembly of mandrels of conductive rings with small diameters, thin thicknesses, and very small ring-to-ring spacing, reduces the generation of defects such as cracks, looseness, or bubbles, improves the low yield rate of ultra-macro mandrels, and is suitable for making ultra-macro precision conductive slip rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention;

[0012] Figure 2 It is a cross-sectional schematic diagram of the glue injection process of the present invention;

[0013] Figure 3 It is a schematic diagram of the structure when the insulating sleeve is mounted on the supporting shaft;

[0014] Figure 4 It is a schematic diagram of the structure when the insulating sleeve and the support shaft are disassembled. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] like Figure 1-4 As shown, a stacked ultra-micro pitch precision conductive slip ring core shaft comprises a support shaft 1 and an insulating sleeve 2 sleeved on the support shaft 1, a mounting plate 3 is provided at one end of the support shaft 1, the support shaft 1 is fixedly connected to the middle of the front side of the mounting plate 3, a plurality of long strip grooves 4 are provided on the support shaft 1, the length direction of the long strip grooves 4 is parallel to the length direction of the support shaft 1, a plurality of injection ports 5 respectively connected to the long strip grooves 4 are provided on the back side of the mounting plate 3, a cylindrical boss 6 is provided on the front side of the mounting plate 3, the cylindrical boss 6 is coaxial with the support shaft 1, and the insulating sleeve 2 is composed of a plurality of integrally formed cylindrical bosses 6 arranged around the circumference of the axis of the support shaft 1. The insulating sleeve 2 is composed of insulating plates 7 arranged in rows, the cross section of the insulating plates 7 is arc-shaped, one end of the insulating sleeve 2 is provided with an insulating retaining ring 8, one end of the insulating plates 7 is respectively fixedly connected to the insulating retaining ring 8, the insulating sleeve 2 is sleeved on the support shaft 1, the insulating retaining ring 8 is against the cylindrical boss 6, and an opening 9 is formed between adjacent insulating plates 7, the opening 9 corresponds to the long strip groove 4 one by one, and the long strip groove 4 and the corresponding opening 9 constitute a glue injection cavity 10, and the insulating sleeve 2 is sleeved with a plurality of insulating rings 11 and a plurality of conductive rings 12, and the insulating rings 11 and the conductive rings 12 are arranged alternately in sequence, and the glue injection cavity 10 is filled with cured glue. During installation, the support shaft 1 is inserted into the insulating sleeve 2 from the insulating retaining ring 8 of the insulating sleeve 2, so that the insulating sleeve 2 is sleeved on the support shaft 1, and then the insulating rings 11 and the conductive rings 12 are pressed onto the insulating sleeve 2 in sequence. One end of the glue injection cavity 10 is blocked with the help of the cover plate 13, and the glue injection cavity 10 is filled with glue from the glue injection port 5. After the glue is cured, the cover plate 13 is removed. In order to facilitate the cover plate 13 to block the glue injection cavity 10, the central shaft body 14 can be connected to the end of the support shaft 1 away from the mounting plate 3, and a through hole for inserting the central shaft body 14 is provided in the middle of the cover plate 13. The depth of the through hole is not less than the length of the central shaft body 14. The glue contacts all the insulating rings 11 and the conductive rings 12 at the opening 9, and after curing, the insulating rings 11 and the conductive rings 12 form a whole with the insulating sleeve 2 and the support shaft 1.

[0019] Furthermore, there are two long strip grooves 4, which are arranged opposite to each other. Accordingly, there are two insulating plates 7, two openings 9 are formed between the insulating plates 7, and two glue injection cavities 10. In this way, the insulating ring 11 and the conductive ring 12 both have two upper and lower opposite positions to contact the glue.

[0020] Furthermore, an annular groove 15 with a V-shaped cross section is provided on the outer circumferential surface of the conductive ring 12 , and the annular groove 15 is coaxial with the conductive ring 12 .

[0021] Furthermore, the distance between adjacent conductive rings 12 is less than 0.1 mm.

[0022] Furthermore, the glue is epoxy resin glue.

[0023] Furthermore, the support shaft 1 is made of sus316L steel, the insulating sleeve 2 is made of polysulfone, the conductive ring 12 is made of H62 brass gold-plated material, and the insulating ring 11 is made of PI polyimide plastic.

[0024] It is worth mentioning that the technical features such as epoxy resin glue, polysulfone, H62 brass gold-plated material, PI polyimide plastic, etc. involved in the patent application of this invention should be regarded as prior art. The specific components, working principles, and possible manufacturing methods and processing methods of these technical features can be selected according to the conventional selection in the field, and should not be regarded as the inventive point of this patent. This patent will not be further elaborated.

[0025] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A stacked ultra-micro pitch precision conductive slip ring mandrel, characterized in that: The invention comprises a support shaft and an insulating sleeve sleeved on the support shaft, a mounting plate is arranged at one end of the support shaft, the support shaft is fixedly connected to the middle part of the front side of the mounting plate, a plurality of long strip grooves are arranged on the support shaft, the length direction of the long strip grooves is parallel to the length direction of the support shaft, a plurality of injection ports respectively connected to the long strip grooves are arranged on the back side of the mounting plate, a cylindrical boss is arranged on the front side of the mounting plate, the cylindrical boss is coaxial with the support shaft, the insulating sleeve is composed of a plurality of insulating plates arranged in a row around the circumference of the axis of the support shaft, the cross section of the insulating plate is arc-shaped, an insulating retaining ring is arranged at one end of the insulating sleeve, and the insulating retaining ring is provided at one end of the insulating sleeve. One end of the plate is fixedly connected to an insulating retaining ring, the insulating sleeve is sleeved on the supporting shaft, the insulating retaining ring is against the cylindrical boss, an opening is formed between adjacent insulating plates, the opening corresponds to the long strip groove one by one, the long strip groove and the corresponding opening constitute a glue injection cavity, a plurality of insulating rings and a plurality of conductive rings are sleeved on the insulating sleeve, the insulating rings and the conductive rings are arranged alternately in sequence, the glue injection cavity is filled with cured glue, the number of the long strip grooves is two, the two long strip grooves are arranged oppositely, and an annular groove with a V-shaped cross-section is provided on the outer circumferential surface of the conductive ring, and the annular groove is coaxial with the conductive ring.

2. The stacked ultra-micro pitch precision conductive slip ring mandrel according to claim 1, characterized in that: The distance between adjacent conductive rings is less than 0.1 mm.

3. The stacked ultra-micro pitch precision conductive slip ring mandrel according to claim 1, characterized in that: The glue is epoxy resin glue.

4. The stacked ultra-micro pitch precision conductive slip ring mandrel as claimed in claim 3, characterized in that: The supporting shaft is made of sus316L steel, the insulating sleeve is made of polysulfone, the conductive ring is made of H62 brass gold-plated material, and the insulating ring is made of PI polyimide plastic.

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