Brush structure and electrically conductive slip ring
The brush structure, which combines U-shaped brush filaments with an annular rotor, solves the problem of complex welding and injection molding of traditional brush structures in the small precision electronics industry, achieving stability and reliability of electrical signal transmission, and reducing process complexity and cost.
Patent Information
- Application Number
- CN202521811779.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-25
- Publication Date
- 2026-08-04
- Estimated Expiration
- 2035-08-25
AI Technical Summary
Traditional brush structures in the small precision electronics industry suffer from numerous welding processes, difficulties in dimensional control, and complex injection molding processes, which increases the difficulty and cost of mold design.
By using U-shaped brush filaments in conjunction with an annular rotor, and by setting positioning grooves and through holes on the base, and connecting it to the flow guide using welding arms, a simple electrical connection structure is formed, which simplifies the process and improves dimensional control.
It achieves stability and reliability in electrical signal transmission, reduces process complexity and cost, and improves connection reliability.
Smart Images
Figure CN224595994U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brush structure technology, and in particular to a brush structure applied to a conductive slip ring. Background Technology
[0002] A conductive slip ring consists of a brush structure and at least one rotor. It is an electrical connection device used to achieve continuous and stable transmission of electrical signals or electrical energy between the rotor and the brush structure. It is also known as a slip ring, rotary joint, or electrical rotary connector.
[0003] Traditional brush structures are formed by welding or injection molding two copper pillars of the same size to a base (the base is the foundation of the traditional brush structure).
[0004] The base can be used to support the copper pillars mentioned above, which can clamp the rotor through sliding contact to form an electrical connection between the copper pillars and the rotor.
[0005] Although the rotor in a traditional brush structure can maintain the continuity and reliability of the above electrical connections as it rotates around its own axis.
[0006] However, traditional brush structures still have some drawbacks: (1) The traditional brush structure has many welding processes (many assembly and welding points) and is difficult to control in terms of size (especially in the small and precise electronics industry).
[0007] (2) The traditional brush structure injection molding scheme has many processes (a large number of embedded brushes, which is time-consuming and labor-intensive), increasing the difficulty of mold design. Utility Model Content
[0008] The brush structure and conductive slip ring provided by this utility model aim to solve at least some of the defects of existing brush structures used in conductive slip rings.
[0009] In a first aspect, this utility model provides a brush structure. The brush structure is applied in a conductive slip ring having N rotors, each rotor being annular, and each rotor having M track grooves formed on its outer ring surface; The brush structure includes: N sets of brush components, each set of brush components can clamp a corresponding set of rotors; Each set of brush components consists of M brush filaments, and each brush filament is configured in a U-shape with an opening. The opening of the brush bristles has a preset first size, and the track groove has a preset second size in the radial direction of the rotor; The first dimension can be configured according to the second dimension so that the brush filaments provide a tension force for clamping the rotor when the brush assembly clamps the rotor; A base and N flow guides, wherein at least a portion of each flow guide is embedded in the base, and at least a portion of each brush bristle is disposed on the base; At least a portion of the flow guide is welded to at least a portion of the brush component to connect the rotor to the brush component; Where N is a positive integer not less than 1, and M is a positive integer not less than 1.
[0010] In some embodiments, one side of the base in the first direction is provided with N positioning grooves spaced apart along the second direction, and the positioning grooves all penetrate through the two opposite sides of the base in the third direction. Wherein, the first direction is the thickness direction of the base, the second direction is the length direction of the base, and the third direction is the width direction of the base.
[0011] In some embodiments, the rotors are spaced apart along the second direction, and the opening position of the positioning groove corresponds to the setting position of the rotor.
[0012] In some embodiments, the positioning groove is provided with M pairs of through holes on both sides of the third direction, and the through holes all penetrate the positioning groove and the base on the other side in the first direction. The positioning groove is provided with a wire management part, and the wire management part has a welding area and M pairs of wire management grooves at one end opposite to the bottom surface of the positioning groove in the first direction.
[0013] In some embodiments, the location of the through hole corresponds to the location of the track groove in the first direction, and the location of the through hole corresponds to the location of the cable management groove in the third direction.
[0014] In some embodiments, the brush bristles include: Welding arm and a pair of flexible arms; The pair of elastic arms are formed by bending at least a portion of the welded arm, and the pair of elastic arms and the welded arm are an integral structure.
[0015] In some embodiments, the welding arm is inserted into the wire management groove to fix the brush filaments on the base; The end of the elastic arm away from the welding arm extends through the through hole along the first direction toward the side opposite to the positioning groove until it abuts against the track groove.
[0016] In some embodiments, the flow guide includes: Embedded part, soldered part, and lead-out part; The welding part and the lead-out part are respectively disposed at the two ends of the embedded part, and the welding part, the lead-out part and the embedded part are an integral structure.
[0017] In some embodiments, the embedding portion is embedded in the base, the lead-out portion extends out of the base along the second direction, and the welding portion extends into the welding area along the second direction; The welding arm and the welding part are welded to each other in the welding area so that the rotor is connected to the lead-out part.
[0018] Secondly, this utility model provides a conductive slip ring. The conductive slip ring includes: N rotors and the above-described brush structure, wherein the brush component of the brush structure is used to clamp the N rotors; Each rotor is annular, and each rotor has M track slots on its outer ring surface, where N and M are both positive integers not less than 1. When the elastic arm of the brush filament in the brush assembly abuts against the track groove, the rotor can rotate about its axial direction.
[0019] At least one beneficial effect of the brush structure and conductive slip ring provided by this utility model embodiment is that by configuring the shape of the brush filaments as U-shaped, the brush structure has the advantages of simple process, convenient size control and low cost; since the first dimension can be configured according to the second dimension, the U-shaped brush filaments can form a tension force to clamp the rotor after cooperating with the annular rotor, and this design can ensure stable electrical signal transmission; welding the brush component to the current guide can effectively increase the connection reliability of the brush component and the current guide at the connection point. Attached Figure Description
[0020] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0021] Figure 1 This is a schematic diagram of the structure of the conductive slip ring provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the brush structure provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the structure of the base provided in this embodiment of the utility model; Figure 4 This is a schematic diagram of the structure of the brush bristles provided in an embodiment of this utility model; Figure 5 This is a schematic diagram of the rotor structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the flow guide provided in an embodiment of the present utility model.
[0022] Figure label: 1000, conductive slip ring; 100. Brush structure; 1. Brush component; 11. Brush bristles; 110. Opening; 111. Welding arm; 112. Elastic arm; 2. Base; 21. Positioning groove; 210. Bottom surface of positioning groove; 211. Through hole; 212. Cable management section; 2121. Cable management groove; 2122. Welding area; 3. Guide component; 31. Embedded part; 32. Welding part; 33. Lead-out part; 200, rotor; 2001, track groove. Detailed Implementation
[0023] The present invention will now be described in detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.
[0024] It should be noted that, unless otherwise explicitly specified and limited, the terms "X direction," "Y direction," "Z direction," "relative," "thickness direction," "length direction," "width direction," "away from," and "away from" used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features; thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature; "multiple" or "several" means two or more; and "and / or" includes any and all combinations of one or more of the associated listed items. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0025] Figure 1 This is a schematic diagram of the structure of the conductive slip ring provided in this embodiment of the utility model. Figure 2 This is a schematic diagram of the brush structure provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of the base provided in an embodiment of the present utility model. Figure 4 This is a schematic diagram of the structure of the brush bristles provided in this embodiment of the utility model. Figure 5 This is a schematic diagram of the rotor provided in an embodiment of the present invention. Figure 6 This is a schematic diagram of the flow guide provided in an embodiment of the present utility model.
[0026] In the following description, such as Figures 1-3 As shown, the following situations exist: the first direction or the thickness direction of the base 2 is set as the "Z direction", the second direction or the length direction of the base 2 is set as the "Y direction", and the third direction or the width direction of the base 2 is set as the "X direction".
[0027] Please see Figures 1-5 The brush structure 100 is used in a conductive slip ring 1000 with N rotors 200. Each rotor 200 is annular, and M track grooves 2001 are opened on the outer ring surface of each rotor 200.
[0028] The term "conductive slip ring" refers to an electrical connection device used to achieve continuous and stable transmission of electrical signals or electrical energy between rotating components (e.g., rotors or conductive rings) and stationary components (e.g., brush structures). It is also known as a slip ring, rotary joint, or electrical rotary connector. The rotor and brush structure in the conductive slip ring make sliding contact, which enables the rotor to maintain the continuity and reliability of the electrical connection during rotation.
[0029] It should be noted that N and M are both positive integers not less than 1; generally speaking, N is usually 2 to 10; in the embodiments of this application, N and M are both 2. It is understood that the brush structure 100 includes: N sets of brush components 1, base 2 and N flow guides 3.
[0030] Each set of brush components 1 can hold a corresponding set of rotors 200.
[0031] In addition, each brush assembly 1 consists of M brush filaments 11, and each brush filament 11 is configured in a U-shape with an opening 110.
[0032] In addition, the opening 110 of the brush filament 11 has a preset first size, and the track groove 2001 has a preset second size in the radial direction of the rotor 200.
[0033] Specifically, the first dimension can be configured according to the second dimension so that the brush filament 11 provides a tension force for clamping the rotor 200 when the brush component 1 clamps the rotor 200.
[0034] The U-shaped brush filaments 11, when combined with the annular rotor 200, can generate a tension force to clamp the rotor, thereby ensuring stable electrical signal transmission even as the rotor 200 rotates around its own axis.
[0035] In this embodiment, the designer can design the first dimension of the brush filament 11 at the opening 110 based on the second dimension of the track groove 2001 in the radial direction of the rotor 200. This gives the brush filament 11 the advantages of simple process (the brush filament 11 only needs to be bent according to the first dimension to form a U-shaped structure that matches the track groove 2001), convenient size control (the brush filament 11 can be manually expanded or reduced in the first dimension, and the brush filament 11 can even automatically expand in the first dimension under the extrusion of the track groove 2001), and low cost (simple process leads to low process cost).
[0036] To further explain, at least a portion of each flow guide 3 is embedded in the base 2, and at least a portion of each brush filament 11 is disposed on the base 2.
[0037] Specifically, at least a portion of the flow guide 3 is welded to at least a portion of the brush component 1 so that the rotor 200 is connected to the brush component 1. This design can effectively increase the connection reliability between the brush component 1 and the flow guide 3 at the connection point.
[0038] In some embodiments, such as Figure 2 and Figure 3 As shown, the base 2 has N positioning grooves 21 spaced apart along the Y direction on one side in the Z direction, and the positioning grooves 21 all penetrate the opposite sides of the base 2 in the X direction.
[0039] It should be noted that the Z direction is the thickness direction of the base 2, the Y direction is the length direction of the base 2, and the X direction is the width direction of the base 2.
[0040] In some embodiments, according to Figure 1 It can be seen that the rotors 200 are spaced apart along the Y direction, and the opening position of the positioning groove 21 corresponds to the setting position of the rotors 200.
[0041] Specifically, the distribution of the brush components 1 is determined according to the distribution of the rotor 200.
[0042] In some embodiments, by Figure 2It can be seen that the positioning groove 21 has M pairs of through holes 211 on both sides opposite to each other in the X direction, and the through holes 211 penetrate the positioning groove 21 and the base 2 on the other side in the Z direction.
[0043] It is understood that a cable management section 212 is provided in the positioning groove 21, and the cable management section 212 has a welding area 2122 and an M-shaped cable management groove 2121 at the end opposite to the bottom surface 210 of the positioning groove in the Z direction.
[0044] In some embodiments, combined with Figures 1-3 It can be seen that the opening position of the through hole 211 corresponds to the setting position of the track groove in the Z direction, and the opening position of the through hole 211 corresponds to the opening position of the cable management groove 2121 in the X direction.
[0045] In some embodiments, refer to Figure 4 It is known that the brush filament 11 includes: a welding arm 111 and a pair of elastic arms 112.
[0046] In the embodiments of this application, a pair of elastic arms 112 are formed by bending at least a portion of the welded arm 111, and the pair of elastic arms 112 and the welded arm 111 are an integral structure.
[0047] In some embodiments, combined with Figures 1-4 It can be seen that the welding arm 111 is inserted into the wire channel 2121 so that the brush filament 11 is fixed on the base 2.
[0048] To further explain, the end of the elastic arm 112 away from the welding arm 111 extends through the through hole 211 along the Z direction toward the side opposite to the positioning groove 21 until it abuts against the track groove 2001.
[0049] In some embodiments, according to Figure 6 It can be seen that the guide member 3 includes: an embedded part 31, a welding part 32, and an outlet part 33.
[0050] Specifically, the welding part 32 and the lead-out part 33 are respectively provided at the two ends of the embedded part 31, and the welding part 32, the lead-out part 33 and the embedded part 31 are an integral structure.
[0051] In some embodiments, combined with Figure 1 , Figure 2 and Figure 6 It can be seen that the embedded part 31 is embedded in the base 2, the lead-out part 33 extends out of the base 2 along the Y direction, and the welding part 32 extends into the welding area 2122 along the Y direction.
[0052] Specifically, the welding arm 111 and the welding part 32 are welded to each other in the welding area 2122 so that the rotor 200 is connected to the lead-out part 33.
[0053] To further explain, the embedded part 31 and the base 2 are injection molded so that the guide part 3 and the base 2 form an integral structure.
[0054] Combination Figures 1-6 It can be seen that the conductive slip ring 1000 includes: N rotors 200 and the brush structure 100 described above.
[0055] Among them, the brush component 1 of the brush structure 100 is used to clamp N rotors 200.
[0056] In addition, each rotor 200 is annular, and each rotor 200 has M track grooves on its outer ring surface, where N and M are both positive integers not less than 1.
[0057] Furthermore, when the elastic arm 112 of the brush filament 11 in the brush assembly 1 abuts against the track groove, the rotor 200 can rotate around its axial direction.
[0058] Combination Figures 1-6 The manufacturing process of this conductive slip ring 1000 is described in detail below: First, the first dimension of the brush filament 11 is designed according to the second dimension of the track groove 2001; second, the brush filament 11 is bent into a U-shape according to the first dimension; then, the guide element 3 is designed according to the distribution of the rotor 200, and the welding part 32 is designed at the place where it mates with the welding arm 111; next, the guide element 3 is stamped out; then, the cut guide element 3 is placed in the injection mold, and after injection molding, an integral structure of the guide element 3 and the base 2 is obtained; after that, A positioning groove 21 of appropriate size is designed according to the distribution of the rotor 200. At the same time, a through hole 211 and a wire management part 212 with a wire management groove 2121 are designed in the positioning groove. Next, the welding arm 111 of the brush filament 11 is inserted into the wire management groove 2121, and the elastic arm 112 is inserted through the through hole 211 and fitted onto the track groove 2001 of the rotor 200 to form a sliding contact. Finally, the welding arm 111 of the brush filament 11 and the welding part 32 of the guide member 3 are welded and assembled in the welding area 2122 to obtain a complete conductive slip ring 1000.
[0059] In summary, the brush structure and conductive slip ring provided by this utility model embodiment, by configuring the brush filaments into a U-shape, offer advantages such as simple manufacturing process, convenient size control, and low cost. Since the first dimension can be configured according to the second dimension, the U-shaped brush filaments, when combined with the annular rotor, can generate a tension force to clamp the rotor, ensuring stable electrical signal transmission. Welding the brush component to the current guide effectively increases the connection reliability between the brush component and the current guide at the connection point. Therefore, the brush structure provided by this utility model embodiment is novel compared to traditional brush structures.
[0060] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and all of these fall within the protection scope of the present invention.
Claims
1. A brush structure used in a conductive slip ring having N rotors, each rotor being annular, and each rotor having M track grooves formed on its outer annular surface, characterized in that, include: N sets of brush components, each set of brush components can clamp a corresponding set of rotors; Each set of brush components consists of M brush filaments, and each brush filament is configured in a U-shape with an opening. The opening of the brush bristles has a preset first size, and the track groove has a preset second size in the radial direction of the rotor; The first dimension can be configured according to the second dimension so that the brush filaments provide a tension force for clamping the rotor when the brush assembly clamps the rotor; A base and N flow guides, wherein at least a portion of each flow guide is embedded in the base, and at least a portion of each brush bristle is disposed on the base; At least a portion of the flow guide is welded to at least a portion of the brush component to connect the rotor to the brush component; Where N is a positive integer not less than 1, and M is a positive integer not less than 1.
2. The brush structure according to claim 1, characterized in that, The base has N positioning grooves spaced apart along the second direction on one side in the first direction, and the positioning grooves all penetrate the base on opposite sides in the third direction. Wherein, the first direction is the thickness direction of the base, the second direction is the length direction of the base, and the third direction is the width direction of the base.
3. The brush structure according to claim 2, characterized in that, The rotors are spaced apart along the second direction, and the opening position of the positioning groove corresponds to the setting position of the rotor.
4. The brush structure according to claim 2, characterized in that, The positioning groove has M pairs of through holes on both sides opposite to each other in the third direction, and the through holes all penetrate the positioning groove and the base on the other side in the first direction. The positioning groove is provided with a wire management part, and the wire management part has a welding area and M pairs of wire management grooves at one end opposite to the bottom surface of the positioning groove in the first direction.
5. The brush structure according to claim 4, characterized in that, The location of the through hole corresponds to the location of the track groove in the first direction, and the location of the through hole corresponds to the location of the cable management groove in the third direction.
6. The brush structure according to claim 4, characterized in that, The brush bristles include: Welding arm and a pair of flexible arms; The pair of elastic arms are formed by bending at least a portion of the welded arm, and the pair of elastic arms and the welded arm are an integral structure.
7. The brush structure according to claim 6, characterized in that, The welding arm is inserted into the wire management groove to fix the brush filaments on the base; The end of the elastic arm away from the welding arm extends through the through hole along the first direction toward the side opposite to the positioning groove until it abuts against the track groove.
8. The brush structure according to claim 6, characterized in that, The flow guide includes: Embedded part, soldered part, and lead-out part; The welding part and the lead-out part are respectively disposed at the two ends of the embedded part, and the welding part, the lead-out part and the embedded part are an integral structure.
9. The brush structure according to claim 8, characterized in that, The embedded part is embedded in the base, the lead-out part extends out of the base along the second direction, and the welding part extends into the welding area along the second direction; The welding arm and the welding part are welded to each other in the welding area so that the rotor is connected to the lead-out part.
10. A conductive slip ring, characterized in that, include: N rotors and a brush structure as described in any one of claims 1-9, wherein the brush component of the brush structure is used to clamp the N rotors; Each rotor is annular, and each rotor has M track slots on its outer ring surface, where N and M are both positive integers not less than 1. When the elastic arm of the brush filament in the brush assembly abuts against the track groove, the rotor can rotate about its axial direction.