Conductive slip ring and slip ring middle shaft of conductive slip ring

Abstract

The utility model discloses a conductive slip ring's slip ring middle axle and conductive slip ring, slip ring middle axle includes conducting part and first wire, the conducting part includes circuit board, pad and metal conducting layer, the circuit board has the welding face and the annular outer peripheral surface around the welding face, the pad is located on the welding face, the metal conducting layer is plated on the annular outer peripheral surface, the pad passes through the circuit on the board line structure with the metal conducting layer electrically connected, the metal conducting layer is used for with the contact of the conductive brush of conductive slip ring, the first wire is welded on the pad. The above -mentioned scheme can solve the problem that the manufacturing difficulty of conductive slip ring is greater.

Description

Technical Field

[0001] This utility model relates to the field of conductive slip ring technology, and in particular to a slip ring central shaft and a conductive slip ring. Background Technology

[0002] A slip ring is a device used to electrically connect two relatively rotating devices. A slip ring includes a stator and a central shaft, also called a rotor. The central shaft includes a conductive ring and a first conductor. The conductive ring is typically a copper ring, welded to one end of the first conductor, the other end of which is electrically connected to one of the two relatively rotating devices. The stator includes a housing, conductive brushes, and a second conductor. The conductive brushes are fixed inside the housing. One end of the second conductor is electrically connected to the conductive brushes, and the other end is electrically connected to the other of the two relatively rotating devices. The central shaft is rotatably located within the housing. The conductive brushes overlap the conductive rings and are electrically connected to them. When the central shaft rotates relative to the stator, the conductive rings rotate relative to the conductive brushes, which remain in contact with the conductive rings, thus enabling the transmission of current and signals between the two relatively rotating devices.

[0003] However, conductive slip rings are usually made of thin ring-shaped sheets formed by bending or stamping metal sheets. Because of their thinness, these ring-shaped sheets are difficult to handle during production and are easily scratched and deformed. They are also difficult to weld, which makes the manufacturing of conductive slip rings quite challenging. Utility Model Content This utility model discloses a slip ring central shaft and a conductive slip ring, in order to solve the technical problem of the high difficulty in manufacturing conductive slip rings.

[0004] To solve the above problems, the present invention adopts the following technical solution: A slip ring central shaft for a conductive slip ring, comprising: The conductive part includes a circuit board, pads, and a metal conductive layer. The circuit board has a soldering surface and an annular outer peripheral surface surrounding the soldering surface. The pads are disposed on the soldering surface, and the metal conductive layer is plated on the annular outer peripheral surface. The pads are electrically connected to the metal conductive layer through the circuit structure on the circuit board. The metal conductive layer is used to contact the conductive brush of the conductive slip ring. The first wire is soldered to the pad.

[0005] A conductive slip ring includes a stator portion and the aforementioned slip ring central shaft; the stator portion includes a housing, a conductive brush, and a second conductor; the housing has a receiving cavity, the conductive brush is fixedly installed in the receiving cavity, and the conductive brush is electrically connected to the second conductor; the conductive portion is rotatably disposed in the receiving cavity, and the conductive brush overlaps the metal conductive layer of the conductive portion and is electrically connected to the metal conductive layer.

[0006] The technical solution adopted in this utility model can achieve the following beneficial effects: In the slip ring shaft disclosed in this utility model, the conductive part includes a circuit board, solder pads, and a metal conductive layer. The circuit board has a soldering surface and an annular outer peripheral surface surrounding the soldering surface. The solder pads are disposed on the soldering surface, and the metal conductive layer is plated on the annular outer peripheral surface. The solder pads are electrically connected to the metal conductive layer through the circuit structure on the circuit board. The metal conductive layer is used to contact the conductive brush of the conductive slip ring. The first wire is soldered to the solder pads. In this design, the conductive part uses a circuit board as the mounting base, and is electrically connected to the conductive brush through the metal conductive layer plated on the annular outer peripheral surface of the circuit board. In this design, the circuit board has dedicated solder pads for soldering the first wire, and the circuit board has good rigidity and is not easily deformed. Therefore, when the circuit board is soldered to the first wire, the circuit board is not easily deformed, and the soldering reliability is high, which helps to reduce the manufacturing difficulty of the conductive slip ring. Attached Figure Description The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the slip ring central shaft disclosed in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the conductive part of the slip ring central shaft disclosed in an embodiment of the present utility model; Figure 3 This is a partial schematic diagram of the slip ring central shaft disclosed in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of the conductive slip ring disclosed in the embodiment of this utility model; Figure 5 This is a cross-sectional view of the conductive slip ring disclosed in an embodiment of this utility model; Figure 6 yes Figure 5 Sectional view along the middle AA direction; Figure 7 yes Figure 5 Cross-sectional view of the middle BB direction.

[0007] Explanation of reference numerals in the attached figures: 100-Slip ring central shaft, 110-Conductive part, 111-Circuit board, 111a-Welding surface, 111b-Annular outer peripheral surface, 111c-Through hole, 112-Solder pad, 113-Metallic conductive layer, 120-First conductor, 130-Insulating fixing part, 131-Fixing post, 132-Annular protrusion, 140-First bearing, 150-Second bearing; 200-Stator section, 210-Housing shell, 211-Receiving cavity, 220-Conductive brush, 230-Second conductor. Detailed Implementation

[0008] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0009] In related technologies, the conductive ring on the central shaft of a slip ring is typically a thin, annular structure formed by bending or stamping a metal sheet. The width and thickness of this annular structure are relatively thin, making it prone to deformation during assembly and affecting its performance. Furthermore, the thinness of the annular structure makes welding to the first conductor difficult, further complicating slip ring assembly. Additionally, the thin annular structure hinders the clamping and placement of equipment during assembly, resulting in low assembly efficiency. Therefore, the manufacturing of conductive slip rings in related technologies is challenging.

[0010] The technical solutions disclosed in the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0011] like Figures 1 to 7 As shown in the figure, this utility model discloses a slip ring central shaft 100 for a conductive slip ring. The slip ring central shaft 100 is used in a conductive slip ring. Specifically, the slip ring central shaft 100 is rotatably engaged with the stator portion 200 of the conductive slip ring. The disclosed slip ring central shaft 100 includes a conductive portion 110 and a first wire 120.

[0012] The conductive part 110 includes a circuit board 111, solder pads 112, and a metal conductive layer 113. The circuit board 111 typically includes a substrate, a circuit layer, and a solder mask layer. The substrate is the foundation of the circuit board 111 and is usually made of insulating materials, such as fiberglass or reinforced epoxy resin (FR-4), used to support and isolate circuit components and lines. The circuit layer is generally made of copper foil and is fixed on the substrate to connect electronic components, form circuits, and realize current transmission. The solder mask layer is a green coating film, such as epoxy resin, covering the circuit board 111 to protect the circuit and prevent short circuits and corrosion of the copper surface in non-soldering areas. The circuit board 111 in this application can be a printed circuit board (PCB) or a rigid-flex board. The circuit board 111 in this application needs to have a certain degree of rigidity; therefore, the circuit board 111 in this application is a rigid board. The circuit board 111 can be a single-sided board, meaning that only one side has a circuit layer. Of course, the circuit board 111 can also be a double-sided board, meaning that it contains three or more circuit layers connected by vias, which can meet the needs of high-density and complex circuits. The specific structure of circuit board 111 is a well-known technology and is not limited in this article.

[0013] The circuit board 111 has a soldering surface 111a and an annular outer peripheral surface 111b surrounding the soldering surface 111a. At this time, the soldering surface 111a is the top or bottom surface of the circuit board 111, while the annular outer peripheral surface 111b is the side surface of the circuit board 111.

[0014] The solder pad 112 is located on the soldering surface 111a, and the solder pad 112 can be made of metal materials such as copper and silver.

[0015] A conductive metal layer 113 is plated on the annular outer peripheral surface 111b, which can also be understood as the conductive metal layer 113 surrounding the circuit board 111. At this time, the conductive metal layer 113 is plated on the outer surface of the circuit board 111. The pads 112 are electrically connected to the conductive metal layer 113 through the circuit structure on the circuit board 111. The circuit structure on the circuit board 111 is the circuit layer mentioned above, and the pads 112 are electrically connected to the conductive metal layer 113 through the circuit layer on the circuit board 111. The conductive metal layer 113 is used to contact the conductive brush 220 of the conductive slip ring. At this time, the conductive brush 220 of the stator 200 overlaps the conductive metal layer 113. When the central shaft 100 of the slip ring rotates, the conductive metal layer 113 can slide relative to the conductive brush 220 along its circumference, thereby ensuring electrical conductivity even when the stator 200 rotates relative to the central shaft 100 of the slip ring.

[0016] The first conductor 120 is soldered onto the pad 112. At this time, the first conductor 120 is electrically connected to the stator section 200 through the pad 112, the circuit board 111, and the metal conductive layer 113.

[0017] In the embodiments disclosed in this application, the conductive part 110 uses a circuit board 111 as the mounting base, and is electrically connected to the conductive brush 220 of the conductive slip ring through a metal conductive layer 113 plated on the annular outer peripheral surface 111b of the circuit board 111. At this time, the circuit board 111 has dedicated solder pads 112 for soldering the first wire 120, and the circuit board 111 has good rigidity and is not easily deformed. Therefore, when the circuit board 111 is soldered to the first wire 120, the circuit board 111 is not easily deformed, and the soldering reliability is high, thus helping to reduce the manufacturing difficulty of the conductive slip ring.

[0018] Furthermore, since the circuit board 111 has good rigidity, the conductive part 110 is easier to clamp and place during the assembly of the conductive slip ring, which helps to improve the assembly efficiency of the conductive slip ring.

[0019] In addition, a metal conductive layer 113 is plated on the annular outer peripheral surface 111b of the circuit board 111, through which electrical conduction is achieved with the conductive slip ring. Compared with the method of directly using a metal sheet in related technologies, the metal conductive layer 113 in this application can be adjusted in terms of its plating thickness and material matching ratio according to the life requirements of the slip ring central shaft 100, thereby achieving compatibility between lifespan and cost, and thus improving the cost-effectiveness of the slip ring central shaft 100.

[0020] In the above scheme, the metal conductive layer 113 can be a circular ring structure. In this case, during the rotation of the central shaft 100 of the slip ring, the conductive brush 220 can have good contact performance with the metal conductive layer 113, thereby avoiding the risk of poor connection or open circuit between the central shaft 100 of the slip ring and the conductive brush 220.

[0021] In one embodiment, the circuit board 111 can be a rectangular structure, in which case the projection of the annular outer peripheral surface 111b is rectangular. When the metal conductive layer 113 is plated, the outer peripheral surface of the metal conductive layer 113 can be a circular annular surface, and the shape of the inner annular surface matches the annular outer peripheral surface 111b of the circuit board 111. That is, the central hole of the metal conductive layer 113 is rectangular, and the circuit board 111 is embedded in the central hole.

[0022] Alternatively, in another alternative design, the circuit board 111 can be a disk structure, in which case the annular outer peripheral surface 111b projects as a circle. In this case, the conductive metal layer 113 can be a ring structure. The central hole of the conductive metal layer 113 is also a circular hole.

[0023] In an optional embodiment, the circuit board 111 may have a through hole 111c, which extends from one side of the solder surface 111a to the side of the circuit board 111 opposite to the solder surface 111a. In this solution, the through hole 111c on the circuit board 111 reduces the weight of the conductive part 110, thereby reducing the weight of the slip ring shaft 100 and facilitating the rotation of the slip ring shaft 100.

[0024] In addition, the through hole 111c on the circuit board 111 facilitates the passage of the first wire 120, making it convenient for the slip ring central shaft 100 to be routed.

[0025] In another alternative embodiment, the slip ring central shaft 100 may further include an insulating fixing portion 130, a portion of which penetrates a through hole 111c in the circuit board 111. The circuit board 111 is fixedly sleeved onto the insulating fixing portion 130 through the through hole 111c. In this embodiment, the insulating fixing portion 130 provides a mounting base for the conductive portion 110, and the circuit board 111 is fixedly mounted on the insulating fixing portion 130, thereby improving the rotational stability of the slip ring central shaft 100.

[0026] Optionally, the insulating fixing part 130 can be made of plastic material, in which case the insulating fixing part 130 can be integrally injection molded with the circuit board 111. Specifically, the circuit board 111 is first placed into the injection mold, and then plastic material is passed through the through hole 111c. After the plastic material solidifies, the insulating fixing part 130 is formed, thereby realizing the integral injection molding of the insulating fixing part 130 and the circuit board 111. Here, the circuit board 111 and the insulating fixing part 130 can be integrally molded first, and then the solder pads 112, the first wire 120 and the metal conductive layer 113 can be soldered. Alternatively, the metal conductive layer 113 can be plated on the circuit board 111 first, then the solder pads 112 and the first wire 120 can be soldered, and finally the insulating fixing part 130 can be injection molded.

[0027] In another alternative, the insulating fixing part 130 can be injection molded first, and then the circuit board 111 can be fitted on. Of course, the insulating fixing part 130 and the circuit board 111 can also be assembled through other processes, which are not limited herein.

[0028] In another alternative embodiment, a portion of the first conductor 120 may be embedded within the insulating fixing portion 130. This primarily refers to the location where the first conductor 120 connects to the pad 112 being embedded within the insulating fixing portion 130. The first conductor 120 extends from one end of the insulating fixing portion 130. In this case, the insulating fixing portion 130 may have a first end and a second end facing away from each other. The soldering surface 111a of the circuit board 111 may face the first end, thus the first conductor 120 may extend from the side facing the first end, and therefore the first conductor 120 may extend from the first end of the insulating fixing portion 130. Alternatively, if the soldering surface 111a of the circuit board 111 faces the first end, and the first conductor 120 needs to extend from the second end, the end of the first conductor 120 facing away from the pad 112 may pass through a through-hole 111c on the circuit board 111 to the side facing away from the soldering surface 111a, and then extend from the second end.

[0029] In this design, the connection between the first conductor 120 and the pad 112 is embedded in the insulating fixing part 130, which improves the connection strength between the first conductor 120 and the pad 112 and avoids the risk of the first conductor 120 and the pad 112 breaking, thereby improving the safety and reliability of the slip ring shaft 100.

[0030] In another alternative solution, such as Figure 4 As shown, there can be multiple conductive parts 110 and multiple first wires 120, with each conductive part 110 being connected to a corresponding first wire 120. In this case, each first wire 120 is electrically connected to one conductive part 110, and each first wire 120 is soldered to the corresponding pad 112 of the circuit board 111.

[0031] Multiple circuit boards 111 can be spaced apart on the insulating fixing part 130 along its extending direction. The extending direction of the insulating fixing part 130 can be the axial direction of the through hole 111c on the circuit board 111, or the extending direction of the rotation axis of the slip ring central shaft 100.

[0032] In this scheme, there are multiple conductive parts 110 and multiple first wires 120. Since the slip ring central shaft 100 can achieve multiple electrical conduction, the electrical conduction performance of the slip ring central shaft 100 is improved.

[0033] During the specific assembly process of the slip ring central shaft 100, to facilitate the routing of the slip ring central shaft 100, the upper circuit board 111 can allow its corresponding first wire 120 to pass through the through hole 111c of the lower circuit board 111. At this time, the slip ring central shaft 100 is routed through the through hole 111c of the circuit board 111. For example, as... Figure 4As shown, the first conductor 120 emerges from the left end of the insulating fixing part 130. Therefore, circuit boards 1, 2, 3 and 4 are arranged sequentially from right to left. Circuit boards 1, 2, 3 and 4 are connected to the first conductor 1, the first conductor 2, the first conductor 3 and the first conductor 4 respectively. At this time, the first conductor 1 passes through the corresponding through holes 111c of circuit boards 2, 3 and 4 in sequence. The first conductor 2 passes through the through holes 111c of circuit boards 3 and 4 in sequence. Circuit board 3 passes through the through hole 111c of circuit board 4. The first conductors 1, 2, 3 and 4 form the first conductor bundle.

[0034] Of course, the slip ring central shaft 100 is not limited to four electrical conductions; it can also be other numbers, which are not limited in this article.

[0035] In another alternative embodiment, the insulating fixing part 130 may include a fixing post 131 and a plurality of annular protrusions 132. The annular protrusions 132 may be arranged around the fixing post 131, and the plurality of annular protrusions 132 may be spaced apart along the extending direction of the fixing post 131. Here, the extending direction of the fixing post 131 can be understood as the extending direction of the central rotation axis of the slip ring central shaft 100. A plurality of circuit boards 111 are spaced apart on the fixing post 131 along the extending direction of the fixing post 131, and annular protrusions 132 are provided between two adjacent circuit boards 111. The outer diameter of the annular protrusions 132 is larger than the outer diameter of the conductive part 110. In this case, the annular protrusions 132 radially protrudes beyond the outer diameter of the metal conductive layer 113 of the conductive part 110.

[0036] In this design, the annular protrusion 132 can separate two adjacent conductive parts 110, thereby avoiding the risk of short circuit between two adjacent conductive parts 110.

[0037] Furthermore, the thickness of the conductive portion 110 can be greater than the thickness of the annular protrusion 132. Here, the thickness of the conductive portion 110 refers to its dimension along the axial direction of the through hole 111c. The thickness of the conductive portion 110 is equal to the thickness of the circuit board 111. In this case, the conductive portion 110 has a larger thickness, thus providing a larger conductive contact area, which is beneficial for improving the electrical connection performance between the slip ring shaft 100 and the stator portion 200.

[0038] To improve the rotational performance of the slip ring shaft 100, in another alternative embodiment, the slip ring shaft 100 may further include a first bearing 140 and a second bearing 150. The insulating fixing part 130 may have a first end and a second end. The inner ring of the first bearing 140 may be fitted onto the first end, and the inner ring of the second bearing 150 may be fitted onto the second end. The circuit board 111 may be located between the first bearing 140 and the second bearing 150, and the first wire 120 may pass through the inner ring of the first bearing 140.

[0039] In this design, the outer rings of the first bearing 140 and the second bearing 150 can be fixedly connected to the stator 200. At this time, the slip ring shaft 100 is rotatably connected to the stator 200 through the first bearing 140 and the second bearing 150, thus improving the rotational stability of the slip ring shaft 100 and the stator 200.

[0040] In another alternative, the conductive metal layer 113 can be a copper layer. In this solution, copper has good conductivity and is relatively inexpensive, thus offering better economic performance.

[0041] The conductive metal layer 113 in this application is not limited to copper, but can also be made of other metals such as silver and gold. No specific material is limited to the conductive metal layer 113 herein.

[0042] Based on the slip ring central shaft 100 disclosed in the embodiments of this application, the embodiments of this application also disclose a conductive slip ring, the disclosed conductive slip ring including the slip ring central shaft 100 described in any of the embodiments above.

[0043] The conductive slip ring disclosed in this application also includes a stator portion 200, which includes a housing 210, a conductive brush 220, and a second wire 230. The housing 210 has a receiving cavity 211, and the conductive brush 220 can be fixedly installed in the receiving cavity 211. The conductive brush 220 can be electrically connected to the second wire 230. The aforementioned conductive portion 110 is rotatably disposed in the receiving cavity 211. For example, the outer rings of the first bearing 140 and the second bearing 150 can both be fixed in the receiving cavity 211. The conductive brush 220 overlaps the metal conductive layer 113 of the conductive portion 110 and is electrically connected to the metal conductive layer 113.

[0044] In a specific application environment, the first device and the second device are two devices that rotate relative to each other. The housing 210 of the stator 200 is fixed to the first device, and the second wire 230 is electrically connected to the first device. The second device is electrically connected to the first wire 120. At this time, the first device is electrically connected to the second device in sequence through the second wire 230, the conductive brush 220, the metal conductive layer 113, the circuit board 111, the solder pad 112, and the first wire 120.

[0045] In another embodiment, when the slip ring central shaft 100 includes multiple conductive portions 110, there are also multiple conductive brushes 220 and second wires 230, with each conductive brush 220 correspondingly connected to a second wire 230. In this case, the multiple second wires 230 form a second wire bundle. Each conductive brush 220 overlaps the metal conductive layer 113 of the corresponding conductive portion 110, and is electrically connected to its corresponding conductive portion 110.

[0046] The above embodiments of this utility model mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be described in detail here.

[0047] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A slip ring central shaft for a conductive slip ring, characterized in that, include: The conductive part (110) includes a circuit board (111), a pad (112) and a metal conductive layer (113). The circuit board (111) has a soldering surface (111a) and an annular outer peripheral surface (111b) surrounding the soldering surface (111a). The pad (112) is disposed on the soldering surface (111a). The metal conductive layer (113) is plated on the annular outer peripheral surface (111b). The pad (112) is electrically connected to the metal conductive layer (113) through the circuit structure on the circuit board (111). The metal conductive layer (113) is used to contact the conductive brush (220) of the conductive slip ring. The first conductor (120) is soldered to the pad (112).

2. The slip ring shaft according to claim 1, characterized in that, The circuit board (111) has a through hole (111c), which extends from the side where the welding surface (111a) is located to the side of the circuit board (111) away from the welding surface (111a).

3. The slip ring central shaft according to claim 2, characterized in that, The slip ring central shaft (100) also includes an insulating fixing part (130), a portion of which penetrates the through hole (111c) of the circuit board (111), and the circuit board (111) is fixedly sleeved on the insulating fixing part (130).

4. The slip ring central shaft according to claim 3, characterized in that, A portion of the first conductor (120) is embedded in the insulating fixing part (130), and the first conductor (120) extends out from one end of the insulating fixing part (130).

5. The slip ring central shaft according to claim 3 or 4, characterized in that, The number of the conductive part (110) and the first wire (120) are both multiple, and the multiple conductive parts (110) are connected to the multiple first wires (120) in a one-to-one correspondence; Multiple circuit boards (111) are spaced apart on the insulating fixing part (130) along the extending direction of the insulating fixing part (130).

6. The slip ring central shaft according to claim 5, characterized in that, The insulating fixing part (130) includes a fixing post (131) and a plurality of annular protrusions (132). The annular protrusions (132) are arranged around the fixing post (131). The plurality of annular protrusions (132) are arranged at intervals along the extension direction of the fixing post (131). The plurality of circuit boards (111) are spaced on the fixing post (131) at intervals along the extension direction of the fixing post (131). The annular protrusions (132) are provided between two adjacent circuit boards (111). The outer diameter of the annular protrusions (132) is larger than the outer diameter of the conductive part (110).

7. The slip ring central shaft according to claim 6, characterized in that, The thickness of the conductive part (110) is greater than the thickness of the annular protrusion (132).

8. The slip ring central shaft according to claim 3, characterized in that, The slip ring shaft (100) further includes a first bearing (140) and a second bearing (150). The insulating fixing part (130) has a first end and a second end. The first bearing (140) is fitted on the first end, and the second bearing (150) is fitted on the second end. The circuit board (111) is located between the first bearing (140) and the second bearing (150). The first wire (120) passes through the inner ring of the first bearing (140).

9. The slip ring central shaft according to claim 1, characterized in that, The conductive metal layer (113) is a copper layer.

10. A conductive slip ring, characterized in that, The stator (200) includes a stator portion (200) and a slip ring shaft (100) as described in any one of claims 1 to 9. The stator portion (200) includes a housing (210), a conductive brush (220), and a second conductor (230). The housing (210) has a receiving cavity (211). The conductive brush (220) is fixedly installed in the receiving cavity (211) and is electrically connected to the second conductor (230). The conductive part (110) is rotatably disposed in the receiving cavity (211). The conductive brush (220) overlaps the metal conductive layer (113) of the conductive part (110) and is electrically connected to the metal conductive layer (113).

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