Novel conductive connection structure of slip ring
By fixing the vertical compression and positioning pin between the conductive bullet needle and the conductive angle ring, the lack of accuracy and stability of the slip ring is solved, and efficient signal transmission is achieved and cost-reducing.
Patent Information
- Application Number
- CN202422344696.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-25
AI Technical Summary
The existing slip rings have insufficient accuracy and stability, especially the contact deviation between the brush wire and the angle ring is too large, resulting in unstable signal transmission and high cost.
The conductive bullet needle is pressed vertically on the conductive angle ring. By opening holes and welding in the middle of the PCB board, the conductive angle ring and the rotor rotation shaft are fixed with the positioning pin to accurately control the contact point, reduce angle deviation, and improve stability through large spherical contact.
Accurate control of contact points is achieved, the contact deviation between the brush wire and the angle ring is reduced, the stability and welding efficiency of the slip ring are improved, and the cost is reduced.
Smart Images
Figure CN223194186U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of conductive slip rings, and in particular to a novel conductive connection structure of a slip ring. Background Art
[0002] With the continuous development of science and technology, the application field of slip rings is becoming more and more extensive, and at the same time, the requirements for them are also increasing. From the original solution of only needing to solve the 360° winding problem, it is now also necessary to limit the conduction within a specified angle, and the accuracy requirements are also getting higher and higher.
[0003] At present, the conductive slip rings with angle rings in the domestic industry are roughly divided into the following three types: 1. The old carbon brush form is assembled into an assembly by more than ten parts. The brush holder and the angle ring need to be machined multiple times to achieve the required accuracy. The customized small carbon brush is also a slip ring with a spring elastic force pulling structure (as shown in the attached manual). Figure 4 2. It is an existing brush-wire angle slip ring, which is a slip ring that transmits data by passing three elastic brush wires through the PCB board and pressing the angle ring with the brush wire bias angle (see the attached manual). Figure 3 3. For single brush wire type, a boss is made in the middle of the angle ring on the rotor side, and a slot is made in the middle of an insulating sheet to limit its rotation. The stator only uses a thick brush wire to pass through the PCB board obliquely and close to the angle ring to achieve connection (similar to the brush wire angle slip ring). The above slip rings all have some problems:
[0004] 1. The carbon brush type is assembled from more than a dozen materials, and each material has inherent tolerances. Maintaining high precision after assembly is almost impossible. The brush wire type will have some slight deviations in position when the brush wire is welded and fixed due to the inconsistent flatness of the brush wire itself. The slight deviation of the brush wire will cause the curvature of the brush wire to be different, and there will be a gap between the ring and the rotating shaft. The position of the contact point between the brush wire and the ring will cause the pressure on the ring to change due to these reasons. Finally, the angle deviation increases and may even exceed the requirement.
[0005] 2. Existing carbon brush type / single brush type / brush line type and other similar slip rings also have deviations in stability. The carbon brush type has the same reason as above: the more materials, the worse the stability. Although it can meet the use requirements after multiple machining, such problems still exist. The brush line type is welded on the top side to contact the angle ring, and the flat surface is attached to the angle ring. The tightness of the contact will be slightly different. In addition, for the convenience of installation, there is a clearance fit between the angle ring and the rotating shaft, which will cause the equipment to show unstable beating when it vibrates. In addition, when passing the edge of the angle ring, the brush line will fluctuate, which is an unstable problem for signal transmission.
[0006] 3. The carbon brush type has many parts and machining processes, so the cost is very high; the wire brush type is relatively expensive because the brush wire is made of high-quality wear-resistant alloy and the surface is gold-plated. Multiple brushes require 3 brush wires to be used side by side. Utility Model Content
[0007] The purpose of this application is to provide a new conductive connection structure of a slip ring to solve the technical problems raised in the above background technology.
[0008] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a new conductive connection structure of a slip ring, comprising a stator part and a rotor part, wherein the stator part comprises a stator brush holder, a PCB board fixed in the stator brush holder, and a conductive elastic needle welded to the other side of the PCB board; the rotor part comprises a rotor rotating shaft slidingly connected to the stator brush holder, and a conductive angle ring fixed in the rotor rotating shaft, wherein the outer surface of the conductive angle ring contacts the needle head of the conductive elastic needle.
[0009] In one embodiment, the needle head of the conductive elastic needle passes through the PCB board and extends downward, and the upper end of the conductive elastic needle is welded to the pad of the PCB board. A stator wire is welded to one side of the PCB board, and one end of the stator wire passes through the stator brush holder and extends outward. The stator wire is electrically connected to the conductive elastic needle.
[0010] In one embodiment, a rotor wire is welded inside the conductive angle ring, and one end of the rotor wire extends outward.
[0011] In one embodiment, the conductive angle ring is fixed by a positioning pin on the rotor rotating shaft.
[0012] Compared with the prior art, the present invention has the following advantages:
[0013] 1) This application is designed for precise angle requirements. A hole is opened in the middle of the PCB board and a conductive spring pin is directly inserted into the hole. The top is soldered and the bottom is contacted with the surface of the copper ring with a round contact. This installation method allows the conductive spring pin to contact the ring vertically. The angle ring and the rotating axis of the hole also have positioning pins to meet the precision requirements and achieve precise control of the contact point, thereby reducing the angular deviation between the conductive spring pin and the angle ring, greatly improving the problem of excessive contact deviation between the brush line and the angle ring.
[0014] 2) The conductive spring needle in this application can be pressed vertically against the angle ring. The position of the conductive spring needle and the angle ring is constant. In the initial stage, it is a point contact with the maximum spring pressure, and in the middle stage, it becomes a small spherical contact. The contact area increases, and the spring pressure does not decrease much. In the later stage, it becomes a large spherical contact. At this time, the contact area is the largest, the spring pressure is also within the controllable range, and the stability is also better.
[0015] 3) The angle ring of this application is fixed by a locating pin on the rotating shaft, making it easier to assemble than the existing copper ring design that requires a clearance fit between the copper ring and the rotating shaft. The outer diameter of the conductive spring pin is much larger than that of the brush wire, making it easier to insert into the PCB than the brush wire. The use of a clamp to control the height and direction of the brush wire facilitates soldering. In terms of welding efficiency, this application is more efficient than existing angle slip rings. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of this application;
[0017] Figure 2 This is a schematic diagram of the conductive angle ring and conductive elastic pin structure of this application;
[0018] Figure 3 This is a schematic diagram of the structure of an elastic brush slip ring in the prior art;
[0019] Figure 4 It is a schematic diagram of the structure of a carbon brush slip ring in the prior art.
[0020] In the figure: 1. Rotor rotating shaft; 2. Conductive angle ring; 3. Rotor wire; 4. Stator brush holder; 5. PCB board; 6. Conductive spring pin; 7. Stator wire; 8. Elastic brush filament; 9. Carbon brush. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0022] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 a limitation on this application.
[0023] Example:
[0024] See also Figure 1-4The present application provides a technical solution: a new conductive connection structure of a slip ring, comprising a stator part and a rotor part, the stator part comprising a stator brush holder 4, a PCB board 5 fixed in the stator brush holder 4, and a conductive elastic pin 6 welded on the other side of the PCB board 5, the rotor part comprising a rotor rotating shaft 1 slidingly connected to the stator brush holder 4, and a conductive angle ring 2 fixed in the rotor rotating shaft 1, the outer surface of the conductive angle ring 2 contacts the needle head of the conductive elastic pin 6, the conductive elastic pin 6 can be vertically pressed on the conductive angle ring 2, the position of the conductive elastic pin 6 and the conductive angle ring 2 is constant, the initial stage is a point contact, and the spring pressure is the largest, and with wear and tear during use, it will become a small spherical contact in the middle stage, the contact area increases, and the spring pressure does not decrease much, and in the later stage it becomes a large spherical surface, at this time the contact area is the largest, the spring pressure is also within a controllable range, and the stability is also better.
[0025] See also Figure 1 In this embodiment, the needle head of the conductive elastic needle 6 passes through the PCB board 5 and extends downward, and the upper end of the conductive elastic needle 6 is welded to the pad of the PCB board 5. A stator wire 7 is welded on one side of the PCB board 5, and one end of the stator wire 7 passes through the stator brush holder 4 and extends outward. The stator wire 7 is electrically connected to the conductive elastic needle 6. Designed for precise angle requirements, a hole is opened in the middle of the PCB board 5 and a conductive elastic needle 6 is directly inserted into the hole. The top is welded and the bottom contacts the surface of the conductive angle ring 2 with a round contact. This installation method makes the conductive elastic needle 6 contact the ring vertically, thereby reducing the angular deviation between the conductive elastic needle 6 and the conductive angle ring 2, greatly improving the problem of excessive contact deviation between the brush wire and the angle ring.
[0026] The conductive angle ring 2 has a rotor conductor 3 welded inside, and one end of the rotor conductor 3 extends outward. The conductive angle ring 2 is fixed by a locating pin on the rotor rotating shaft 1. The conductive angle ring 2 is fixed by the locating pin on the rotor rotating shaft 1. The conductive angle ring 2 with a hole and the rotor rotating shaft 1 also have locating pins to meet the precision requirements, and realize precise control of the contact point. It is easier to assemble than the clearance fit between the copper ring and the rotating shaft of the existing design; the outer diameter of the conductive spring needle 6 is much larger than the brush wire, and it is easier to penetrate the PCB board 5 than the brush wire in operation, and it is easy to weld. In terms of welding efficiency, this application is more efficient than the existing angle slip ring.
[0027] The installation method of the structure of the present application is as follows: first, the rotor wire 3 is welded to the conductive angle ring 2, and then the conductive angle ring 2 is assembled to the positioning pin of the rotor rotating shaft 1. Such a structure can not only prevent the conductive angle ring 2 from falling off, but also prevent the conductive angle ring 2 from swinging, and also make the angle ring close to the rotating shaft to the maximum extent. The conductive elastic pin 6 is passed through the soldering pad on the PCB board 5 and welded firmly. Then, the stator brush holder 4 and the rotor rotating shaft 1 are assembled together, and then the PCB board 5 is fixed to the stator brush holder 4. Finally, the stator wire 7 is welded to the PCB board 5.
[0028] The above shows and describes the basic principles, main features and advantages of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present application is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present application, and any figure marks in the claims should not be regarded as limiting the claims involved.
[0029] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A novel conductive connection structure of a slip ring, comprising a stator portion and a rotor portion, characterized in that: The stator portion comprises a stator brush holder (4), a PCB board (5) fixedly connected to the stator brush holder (4), and a conductive elastic needle (6) welded to the other side of the PCB board (5); the rotor portion comprises a rotor rotating shaft (1) slidably connected to the stator brush holder (4), and a conductive angle ring (2) fixedly connected to the rotor rotating shaft (1); the outer surface of the conductive angle ring (2) is in contact with the needle head of the conductive elastic needle (6).
2. The novel conductive connection structure of a slip ring according to claim 1, characterized in that: The needle head of the conductive elastic needle (6) passes through the PCB board (5) and extends downward, and the upper end of the conductive elastic needle (6) is welded to the welding pad of the PCB board (5). A stator wire (7) is welded to one side of the PCB board (5), and one end of the stator wire (7) passes through the stator brush holder (4) and extends outward. The stator wire (7) is electrically connected to the conductive elastic needle (6).
3. The novel conductive connection structure of a slip ring according to claim 2, characterized in that: A rotor conductor (3) is welded inside the conductive angle ring (2), and one end of the rotor conductor (3) extends outward.
4. The novel conductive connection structure of a slip ring according to claim 3, characterized in that: The conductive angle ring (2) is fixed by a positioning pin on the rotor rotating shaft (1).