Conducting ring and motor

Abstract

According to the conductive ring and the motor provided by the invention, the annular groove for mounting the conductive brush is formed in the fixed ring, and the conductive brush can be mounted at any position around the annular groove, so that the problem that conductive brush mounting holes need to be formed at fixed points one by one in the fixed ring is solved, and the overall weight of the fixed ring is effectively reduced; the production process of the fixing ring is simplified, meanwhile, one fixing ring can meet the installation requirement when the installation density of the conductive brush changes, batch production can be achieved, and therefore the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of motors, and particularly to a slip ring and a motor. Background Art

[0002] During the use of current variable-frequency motors, the current output by the frequency converter causes an induced voltage on the motor shaft due to the action of high-frequency switching. The generated shaft voltage will be released through the current via the bearing. With the accumulation of static charges, once the induced voltage on the motor shaft accumulates enough to break down the oil film between the bearing balls, it will discharge through the circuit with the smallest resistance, which will cause electro-corrosion pits between the bearing balls and the track. At the same time, the high-speed rolling bearing will cover the entire bearing track with corrosion pits in a short time. Therefore, the prior art always uses a slip ring to protect the motor to solve the problem of bearing corrosion of the variable-frequency motor.

[0003] The slip ring includes a fixed ring and conductive fibers installed on the fixed ring. In the prior art, mounting holes for installing conductive brushes are independently provided on the fixed ring. The conductive brushes need to be individually installed and fixed into the corresponding mounting holes on the fixed ring. When facing changes in the installation density of the conductive brushes, the fixed ring needs to be redesigned. Therefore, the manufacturing process of the slip ring is complex, and the production, use, and installation procedures are relatively cumbersome, with a high cost. At the same time, the installation accuracy of the conductive brushes also needs to be individually inspected, which is not conducive to mass production. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a slip ring and a motor to solve the above-mentioned technical problems existing in the prior art, reduce the manufacturing difficulty of the slip ring, facilitate mass production, and reduce production costs.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A slip ring, the slip ring includes a fixed ring and conductive brushes installed in the fixed ring. An annular groove for installing the conductive brushes is formed on the fixed ring, and two sides of the conductive brushes are in contact with the inner wall of the annular groove.

[0006] Further, the conductive brushes are configured to be clamped and fixed in the annular groove.

[0007] Further, the fixed ring includes a first fixed-ring body and a second fixed-ring body that cooperate to form the annular groove. The second fixed-ring body and the first fixed-ring body are integrally formed or separately provided.

[0008] Further, a fixing structure is formed on at least one of the second fixed-ring body and the first fixed-ring body. The fixing structure is used to fix the conductive brushes on the second fixed-ring body, the first fixed-ring body, or the fixing structure.

[0009] Furthermore, the fixing structure can be deformed under an external force to fix the conductive brush.

[0010] Furthermore, the fixing structure is a blind hole formed on the side wall of the first body and / or the second body of the fixing ring. Under an external force, the bottom of the blind hole deforms along the thickness direction of the fixing ring to abut and fix the conductive brush.

[0011] Furthermore, the conductive ring further includes at least one spacer, and at least one spacer divides the annular groove to form at least two independent accommodation spaces.

[0012] Furthermore, the conductive brush includes conductive fibers and a fixing member for fixing the conductive fibers. The fixing member includes a fixing portion for fixing the conductive fibers, and the fixing portions are arranged at intervals in the circumferential direction in the annular groove.

[0013] Furthermore, the fixing member further includes a connecting portion for connecting the fixing portions. The connecting portion connects and fixes at least one of the fixing portions, and the connecting portion is adapted to the shape of the annular groove or is configured to be deformed under an external force to be adapted to the shape of the annular groove.

[0014] The present application also provides a motor, which includes a motor shaft and a motor housing, and a conductive ring as described above is provided between the motor shaft and the motor housing.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] The present application provides a conductive ring, which forms an annular groove for installing a conductive brush on a fixing ring. By being able to install the conductive brush at any position along the circumference of the annular groove, the problem that the fixing ring needs to form conductive brush installation holes at individual fixed points is solved, effectively reducing the overall weight of the fixing ring, simplifying the production process of the fixing ring, and at the same time enabling a fixing ring to meet the installation requirements when the installation density of the conductive brush changes, which is conducive to mass production and thus reduces the production cost.

[0017] The present application also provides a motor. By loading the above-mentioned conductive ring, the production cost of the motor can be effectively reduced and the production efficiency of the motor can be improved.

[0018] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and implement it according to the content of the description, the following uses the preferred embodiments of the present utility model and combines with the accompanying drawings to describe in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural view of Embodiment 1 of the conductive ring shown in the present application.

[0020] Figure 2 is Figure 1 A cross-sectional view of section A-A in

[0021] Figure 3 is Figure 1 An exploded structural schematic diagram of the conductive ring in

[0022] Figure 4 is Figure 1 A structural schematic diagram of the conductive brush in

[0023] Figure 5 is Figure 1 A structural schematic diagram of another embodiment of the conductive brush in

[0024] Figure 6 A structural schematic diagram of Embodiment 2 of the conductive ring shown in the present application.

[0025] Figure 7 A structural schematic diagram of Embodiment 3 of the conductive ring shown in the present application.

[0026] Figure 8 is Figure 7 A cross-sectional view of section B-B in

[0027] Figure 9 is Figure 6 A structural schematic diagram of the fixing structure in other embodiments in Detailed implementation manners

[0028] The following combines the accompanying drawings and embodiments to further describe in detail the detailed implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0032] Embodiment 1:

[0033] Please refer to Figures 1 to 3 , a kind of slip ring shown in the present application. The slip ring includes a fixed ring 1 and a conductive brush 2 installed inside the fixed ring 1. An annular groove 13 for installing the conductive brush 2 is formed on the fixed ring 1, and the two sides of the conductive brush 2 are in contact with the inner wall of the annular groove 13. Through the annular groove 13, the requirements for any installation position of the conductive brush 2 can be met, and the versatility is strong. At the same time, compared with the traditional independent installation holes, more hollow holes are left after the conductive brush 2 is installed in the annular groove 2, which can effectively reduce the overall weight of the slip ring. The conductive brush 2 is configured to be clamped and fixed in the annular groove 13.

[0034] Among them, the fixed ring 1 includes a first body and a second fixed ring body 12 that are separately arranged. The first fixed ring body 11 includes a circular bottom plate 111 and a stepped protrusion 112 extending from the outer edge of the circular bottom plate 111 along the thickness direction. When the second fixed ring body 12 is assembled on the first fixed ring body 11, the second fixed ring body 12 is located inside the stepped protrusion 112. An annular groove 13 is formed between the second fixed ring body 12 and the circular bottom plate 111. The annular groove 13 extends circumferentially and the opening faces the inside of the fixed ring 1. The conductive brush 2 is inserted inside the fixed ring 1. Of course, in other embodiments, the stepped protrusion 112 can also be formed on the inner edge of the circular bottom plate 111, so that the opening of the annular groove 13 faces the outside of the fixed ring 1.

[0035] In this embodiment, the fixing structure is a bolt. Bolt holes (not shown) are correspondingly arranged on the first fixed ring body 11 and the second fixed ring body 12. The first fixed ring body 11 and the second fixed ring body 12 are connected by bolts passing through the bolt holes. By adjusting the bolts, the first fixed ring body 11 and the second fixed ring body 12 can be moved closer to each other to clamp and fix the conductive brush 2.

[0036] In other embodiments, the stepped protrusion 112 has two levels of steps. A step surface is formed between the top surface of the stepped protrusion and the annular bottom plate 111. The second body 12 of the fixing ring is fixed on the step surface. At this time, the outer surface of the second body 12 of the fixing ring is exactly flush with the top surface of the stepped protrusion, so that the spatial size of the annular groove 13 formed between the first body 11 and the second body 12 of the fixing ring is fixed and unchanged, so that the conductive brush 2 will not be excessively squeezed and deformed. At the same time, while ensuring the fixation of the conductive brush 2, the outer surface of the fixing ring 1 is flush, without stepped high and low surfaces, ensuring better connection and fitting between the first body 11 and the second body 12 of the fixing ring, and improving the assembly accuracy and stability.

[0037] The conductive brush 2 includes conductive fibers 21 and a fixing member for fixing the conductive fibers 21. The fixing member includes a fixing portion 23 for fixing the conductive fibers 21. The fixing portions 23 are arranged at intervals in the circumferential direction in the annular groove 13. The fixing member further includes a connecting portion 22 for connecting the fixing portions 23. The connecting portion 22 connects and fixes at least one fixing portion 23. The connecting portion 22 is adapted to the shape of the annular groove 13 or is configured to be deformed under an external force to be adapted to the shape of the annular groove 13. Among them, the fixing member is made of a deformable, highly elastic, and highly conductive metal material, such as common flexible metal materials like aluminum and copper. The connecting portion 22 can be a long strip-shaped thin sheet, and the fixing portions 23 are arranged at intervals on the connecting portion 22, and the conductive fibers 21 are fixed on the fixing member.

[0038] When the connecting portion 22 can be a long strip-shaped thin sheet, the fixing member is sequentially inserted into the annular groove 13 along the axial direction of the annular groove 13. Under the action of an external force, the long strip-shaped thin sheet is bent to form an annular structure. At this time, the fixing portions 23 are arranged in the circumferential direction on the inner circle of the annular structure formed by the surrounding of the long strip-shaped thin sheet, and the number of the fixing portions 23 is exactly such that the end connection lines of the conductive fibers 21 are approximately circular to ensure the maximum contact area of the conductive fibers 21. When the connecting portion 22 can also be an annular structure, the fixing portion 23 can be directly fixedly arranged on the inner circle of the circular ring structure. The annular structure can be a circular annular structure or a wavy annular structure. Among them, the size of the circular annular structure needs to be adapted to the annular groove 13 so that the conductive brush is coaxially arranged with the fixing ring, while the wavy annular structure can be adapted to the annular groove 13 or can be smaller than the annular groove 13 and is adapted to the annular groove 13 through extrusion deformation. The number and position of the fixing portions 23 can be set as needed and are not limited herein.

[0039] Please refer to Figure 4 , in one embodiment, the conductive brush 2 is arranged in a double layer, which can be formed by stacking two conductive brushes 2 as described above.

[0040] Alternatively, by symmetrically arranging a plurality of fixing parts 23 on both sides of the narrow side of the strip-shaped connecting part 22, when the connecting part 22 is installed into the annular groove 13, the connecting part 22 is bent to form a ring, and the fixing parts 23 located on both sides of the narrow side of the connecting part 22 are bent towards each other to the inner circle of the ring, so that the two fixing parts 23 are mutually attached to form a double-layer conductive fiber 21, thereby increasing the number of conductive fibers 21 of the conductive ring in the axial direction and improving the conductive effect.

[0041] The fixing part 23 can be a cylindrical fixing structure 14, the conductive fiber 21 is inserted into the cylindrical fixing structure 14 and fixed by conductive glue; or it can be a T-shaped binding strip, and the binding strip is made to embrace the circumference of the conductive fiber 21 through an external force, thereby fixing the conductive fiber 21. Of course, the fixing part 23 can also be other structures, as long as the above effects can be achieved, and it is not limited here.

[0042] Please refer to Figure 5 , in another embodiment, the conductive brush 2 can also be a plurality of independent individuals, which are arranged in sequence along the circumference of the annular groove 13, and then the conductive brush 2 is clamped by the fixing ring first body 11 and the fixing ring second body 12. The installation method of a single independent conductive brush 2 can meet the layout requirements when continuous arrangement of the conductive brush 2 is not required. In addition, an installation groove is formed on the inner wall of the annular groove 13, and the movement of the conductive brush 2 in the annular groove 13 is restricted through the installation groove, facilitating the positioning of the conductive brush 2.

[0043] In other embodiments, there are a plurality of connecting parts 22, and the plurality of connecting parts 22 are respectively connected to fix a plurality of conductive brushes 2 to form a conductive brush group. A plurality of conductive brush groups are spaced apart and distributed in the annular groove 13. In this way, compared with the conductive brush 2 formed integrally, the installation difficulty is smaller, and compared with a single independent conductive brush 2, the installation efficiency can be improved. The number of conductive brushes 2 in each conductive brush group can be set according to requirements and is not specifically limited here.

[0044] Embodiment 2:

[0045] Please refer to Figure 6 , the conductive ring shown in this embodiment is similar in structure to the conductive ring shown in Embodiment 1, the difference being that: the fixing ring second body 12 and the fixing ring first body 11 are integrally formed. That is, the fixing ring 1 is a circular ring structure, and an annular groove 13 is formed by extending radially along the inner wall of the circular ring structure.

[0046] With such a setting, the space of the annular groove 13 is fixed. Merely fixing the conductive brush 2 by means of plug-in fixing is not reliable. Therefore, a fixing structure 14 is formed on at least one of the second fixing ring body 12 and the first fixing ring body 11. The fixing structure 14 is used to fix the conductive brush 2 on the second fixing ring body 12, the first fixing ring body 11 or the fixing structure 14. That is, the fixing structure 14 is provided on the first fixing ring body 11 to abut and fix the conductive brush 2 on the second fixing ring body 12; or the fixing structure 14 is provided on the second fixing ring body 12 to abut and fix the conductive brush 2 on the first fixing ring body 11; or the fixing structure 14 is provided on both the first fixing ring body 11 and the second fixing ring body 12, and the conductive brush 2 is fixed by the mutual cooperation of the fixing structures 14.

[0047] The fixing structure 14 can be deformed under an external force to fix the conductive brush 2. That is, the fixing structure 14 itself deforms towards the inside of the annular groove 13 to abut against the conductive brush 2, thereby realizing the fixing of the conductive brush 2. The fixing structure 14 can be a part of the fixing ring 1. For example, a convex structure is provided in the annular groove, and the conductive brush 2 is continuously abutted and fixed by the convex structure. It can also be a mechanical structure provided on the fixing ring 1, such as a screw, a pin, a buckle, etc. As long as it can realize abutting and fixing the conductive brush 2, it is not specifically limited here.

[0048] In this embodiment, the fixing structure 14 is a blind hole formed on the side walls of the first fixing ring body 11 and the second fixing ring body 12. Under an external force, the bottom of the blind hole deforms along the thickness direction of the fixing ring 1 to abut and fix the conductive brush 2. Blind holes are opened on the side walls of the first fixing ring body 11 and the second fixing ring body 12 towards the annular groove 13. The bottom of the blind hole is pushed towards the annular groove 13 by an external force to deform it towards the annular groove 13, thereby forming a circular protrusion. The circular protrusions formed on the first fixing ring body 11 and the second fixing ring body 12 abut against the conductive brush 2 in opposite directions, thereby clamping and fixing the conductive brush 2. Of course, the blind hole can also be formed on one of the first fixing ring body 11 and the second fixing ring body 12, and the conductive brush 2 is clamped and fixed by the circular protrusion on one of the first fixing ring body 11 and the second fixing ring body 12 in cooperation with the inner wall of the annular groove. Of course, the conductive brush 2 can be clamped in the annular groove 13 by interference fit with the annular groove 2.

[0049] In other embodiments, please refer to Figure 9 ., the fixing structure 14 can also be an annular thin-walled part provided on one or both of the first fixing ring body 11 and the second fixing ring body 12. The bottom of the annular thin-walled part is deformed at a fixed point corresponding to the conductive brush 2 towards the annular groove 13 by an external force to fix the conductive brush 2. Of course, the annular thin-walled part can also be composed of discontinuous arc-shaped thin-walled parts.

[0050] In other embodiments, a notch is formed on one of the first body 11 and the second body 12 of the fixing ring at a position facing the annular groove 13. The notch communicates with the annular groove 13. According to the number of notches, the annular groove 13 can be divided to form several mounting portions 2 for mounting the conductive brush, and the installation of the conductive brush 2 can be more convenient through the notch. The number of notches can be set as required and is not limited herein.

[0051] Embodiment 3

[0052] Please refer to Figures 7 to 8 , the conductive ring shown in this embodiment is similar in structure to the conductive ring shown in Embodiment 2. The difference is that: the conductive ring further includes a spacer 15. The annular groove 13 is divided by the spacer 15 to form two independent accommodation spaces, and the conductive brushes 2 are respectively installed in the corresponding installation spaces. The setting of the double-layer conductive brushes 2 is realized, and at the same time, the mutual influence of the multi-layer conductive brushes 2 is avoided. Of course, in other embodiments, according to needs, the number of the spacers 15 can also be set to be more to divide the annular groove 13 into multiple independent installation spaces.

[0053] Embodiment 4

[0054] The present application also provides a motor (not shown), which includes a motor shaft and a motor housing. A conductive ring as described above is provided between the motor shaft and the motor housing.

[0055] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0056] The above-described embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A conductive ring, the conductive ring comprising a fixed ring and a conductive brush installed within the fixed ring, characterized in that, An annular groove for mounting a conductive brush is formed on the fixing ring, and two sides of the conductive brush are in contact with the inner wall of the annular groove, and the conductive brush is configured to be clamped and fixed in the annular groove.

2. The electrical slip ring according to claim 1, wherein The fixing ring includes a first body of the fixing ring and a second body of the fixing ring that cooperate to form the annular groove, and the second body of the fixing ring is integrally formed or separately provided with the first body of the fixing ring.

3. The electrical slip ring according to claim 2, wherein, A fixing structure is formed on at least one of the second body of the fixing ring and the first body of the fixing ring, and the fixing structure is used to fix the conductive brush on the second body of the fixing ring, the first body of the fixing ring or the fixing structure.

4. The electrical slip ring according to claim 3, wherein, The fixing structure can be deformed under an external force to fix the conductive brush.

5. The electrical slip ring according to claim 4, wherein The fixing structure is a blind hole formed on the side wall of the first body of the fixing ring and / or the second body of the fixing ring, and the bottom of the blind hole deforms along the thickness direction of the fixing ring under an external force to abut and fix the conductive brush.

6. The electrical slip ring according to claim 1, wherein The conductive ring further includes at least one spacer, and at least one of the spacers divides the annular groove to form at least two independent accommodating spaces.

7. The electrical slip ring according to claim 1, wherein The conductive brush includes conductive fibers and a fixing member for fixing the conductive fibers, and the fixing member includes a fixing portion for fixing the conductive fibers, and the fixing portions are arranged at intervals in the circumferential direction in the annular groove.

8. The electrical slip ring according to claim 7, wherein The fixing member further includes a connecting portion for connecting the fixing portions, and the connecting portion connects and fixes at least one of the fixing portions, and the connecting portion is adapted to the shape of the annular groove or is configured to be deformed under an external force to be adapted to the shape of the annular groove.

9. A motor, characterized in that, The motor includes a motor shaft and a motor housing, and a conductive ring as described in any one of claims 1 to 8 is provided between the motor shaft and the motor housing.

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