Slip ring for motor

Abstract

The invention discloses a slip ring for a motor, relates to the technical field of electric slip rings, and aims to solve the problems that the slip ring proposed in the background technology is damaged due to long-time operation, low inter-ring insulation, low ground insulation and the like easily occur, and the existing slip ring is large in size, heavy in weight and low in practicability. The installation mechanism comprises an inner steel sleeve and an inner insulation sleeve, a slip ring assembly is arranged outside the inner insulation sleeve, the slip ring assembly comprises three slip ring sleeves, three leads and two inter-ring insulation sleeves, connecting grooves are formed in the outer walls of one sides of the slip ring sleeves, the three leads are fixedly arranged on the inner walls of the three slip ring sleeves respectively, the two inter-ring insulation sleeves are arranged on the outer walls of the inner insulation sleeve respectively in a sleeving mode, and small end covers are arranged outside the slip ring sleeves. And six mounting ports are formed in the annular outer wall of the small end cover. The device has the advantages of being small in size, light in weight, compact in structure and large in conductive bearing capacity, in the long-time operation process, the phenomena of low inter-ring insulation, low ground insulation and the like are not prone to occurring, and practicability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric slip rings, and in particular to a slip ring for a motor. Background Art

[0002] Electric slip rings are the most widely used slip rings for conducting electricity in all slip ring series. They are also called brushes, carbon brushes, collector rings, collector rings, collector rings, swivels, and rotating electrical joints. They are specially used to transmit power supply and signal power supply during unlimited continuous rotation. The stator and rotor parts respectively lead out wires to connect the power supply and terminal electrical appliances of the fixed structure and the rotating structure, and rotate with them. According to their overall structure, they are divided into solid circular slip rings (a hole is dug on the rotating body to install the slip ring), hollow circular slip rings (the slip ring is installed on the rotating shaft), as well as separate slip rings, flat disc slip rings, mercury slip rings, special slip rings, etc.

[0003] In actual use, the slip rings will be damaged due to long-term operation, and the low insulation between the rings and the low insulation to the ground are likely to occur. At the same time, the existing slip rings are large in size, heavy in weight, and have low practicality. Summary of the invention

[0004] The present invention provides a slip ring for a motor, which solves the problems in the prior art that the slip ring may be damaged due to long-term operation, and the insulation between the rings and the ground may be low. At the same time, the existing slip rings are large in size, heavy in weight and low in practicality.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A slip ring for a motor comprises a mounting mechanism, wherein the mounting mechanism comprises an inner steel sleeve and an inner insulating sleeve, a slip ring assembly is arranged outside the inner insulating sleeve, the slip ring assembly comprises three slip ring sleeves each having a connection groove on one side outer wall, three leads respectively fixed on the inner walls of the three slip ring sleeves, and two inter-ring insulating sleeves respectively sleeved on the outer walls of the inner insulating sleeve, a small end cover is arranged outside the slip ring sleeve, and six mounting openings are arranged on the annular outer wall of the small end cover, an insulating assembly is arranged inside the small end cover, the insulating assembly comprises four insulating plates each having a collector ring groove on one side outer wall and three collector rings respectively embedded in three of the collector ring grooves, six connecting assemblies are arranged between the four insulating plates, and the connecting assemblies comprise a brush box each having a fixing hole on the outer walls on both sides, a carbon brush embedded in the brush box, and a compression spring with two ends respectively embedded in two fixing holes.

[0007] Preferably, three mounting grooves are formed on the outer wall of the inner insulating sleeve, and the inner insulating sleeve is sleeved on the outer wall of the inner steel sleeve.

[0008] Preferably, the three slip ring sleeves are respectively sleeved on the outer wall of the inner insulating sleeve, and the three lead wires are respectively embedded in the three installation grooves, one end of the two inter-ring insulating sleeves are respectively inserted into the connecting grooves on two of the slip ring sleeves, and the two inter-ring insulating sleeves are both arranged between the three slip ring sleeves.

[0009] Preferably, one side of the small end cover abuts against the outer wall of one side of the inner steel sleeve, and the small end cover is connected to the outer wall of one side of the end cover by bolts.

[0010] Preferably, the four insulating plates are respectively sleeved on the outer walls of the three slip ring sleeves, and the four insulating plates are respectively sleeved on the inner wall of the small end cover, six limiting grooves are opened on the outer wall of the four insulating plates close to the collector ring groove, and several clamping grooves are opened on the outer wall of the four insulating plates away from the collector ring groove.

[0011] Preferably, one side of the brush box is clamped in the limiting groove, and one side of the brush box is clamped in two of the clamping grooves, and one end of the compression spring abuts against the outer wall of the carbon brush.

[0012] Preferably, three annularly distributed terminal posts are connected to the annular outer wall of the small end cover by bolts, and the three terminal posts are connected to the collector rings by brush soft copper wires respectively.

[0013] The beneficial effects of the present invention are:

[0014] The three lead wires are bent by the mold and then welded to the three slip rings respectively. The steel sleeve and the inner insulating sleeve are aligned and assembled. The insulating sleeve between the connecting rings of the bow|wire slip ring is assembled to the outside of the inner insulating sleeve. Finally, it is basically completed after varnishing and glue filling. The terminal of each phase is connected to the collector ring through the soft copper wire of the brush. The corresponding compression spring is installed in each brush box to apply enough pressure to the conduction of the brush and the slip ring. The brush box and the insulating plate are installed with insulating screws to ensure the overall performance and high reliability. The internal parts of the small end cover are fixed to the end cover with 6 countersunk screws to ensure the integrity. After being applied to the 91kW (the DC input end of the inverter is 450DC, 202A) brushless permanent magnet DC motor, the product has been tested and verified to be stable and reliable (short-term 20min, long-term use can be reduced according to user requirements).

[0015] In summary, the present invention has the advantages of small size, light weight, compact structure and large conductive bearing capacity. During long-term operation, it is not easy to have low insulation between rings and low insulation to the ground, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall front view structure of a slip ring for a motor proposed by the present invention.

[0017] Figure 2 This is a schematic diagram of the front structural view of a slip ring installation mechanism for a motor proposed by the present invention.

[0018] Figure 3 This is a schematic diagram of the front structural view of a slip ring assembly for a motor proposed by the present invention.

[0019] Figure 4 The present invention is a schematic diagram of the main structure of an inter-ring insulating sleeve of a slip ring for a motor proposed by the present invention.

[0020] Figure 5 This is a schematic side view of the structure of a small end cover of a slip ring for a motor proposed by the present invention.

[0021] Figure 6 This is a schematic diagram of the front structural view of an insulating component of a slip ring for a motor proposed by the present invention.

[0022] Figure 7 This is a schematic diagram of the front structural view of a connecting component of a slip ring for a motor proposed by the present invention.

[0023] In the figure: 1. Installation mechanism; 101. Inner steel sleeve; 102. Inner insulating sleeve; 2. Slip ring assembly; 201. Slip ring sleeve; 202. Lead wire; 203. Inter-ring insulating sleeve; 3. Small end cover; 4. Insulation assembly; 401. Insulation plate; 402. Collector ring; 5. Connecting assembly; 501. Brush box; 502. Carbon brush; 503. Compression spring; 6. Terminal. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Example 1, reference Figure 1-7A slip ring for a motor includes a mounting mechanism 1, wherein the mounting mechanism 1 includes an inner steel sleeve 101 and an inner insulating sleeve 102, wherein the outer wall of the inner insulating sleeve 102 is provided with three mounting grooves, and the inner insulating sleeve 102 is sleeved on the outer wall of the inner steel sleeve 101, and a slip ring assembly 2 is arranged outside the inner insulating sleeve 102, wherein the slip ring assembly 2 includes three slip ring sleeves 201 each having a connecting groove on the outer wall of one side, three leads 202 respectively fixed on the inner walls of the three slip ring sleeves 201, and two inter-ring insulating sleeves 203 respectively sleeved on the outer wall of the inner insulating sleeve 102, wherein the three The slip ring sleeves 201 are respectively sleeved on the outer wall of the inner insulating sleeve 102, and the three lead wires 202 are respectively embedded in the three installation grooves, one end of the two inter-ring insulating sleeves 203 is respectively inserted into the connection grooves on two of the slip ring sleeves 201, and the two inter-ring insulating sleeves 203 are arranged between the three slip ring sleeves 201, and the slip ring sleeve 201 is provided with a small end cover 3 on the outside, and the small end cover 3 has six installation openings on the annular outer wall, one side of the small end cover 3 is abutted on the outer wall of the inner steel sleeve 101, and the small end cover 3 is connected to the outer wall of the end cover by bolts, and the small end cover 3 is provided with an insulating assembly 4, the insulating assembly 4 includes four insulating plates 401 with collector ring grooves on one side of the outer wall and three collector rings 402 respectively embedded in three of the collector ring grooves, the four insulating plates 401 are respectively sleeved on the outer walls of the three slip ring sleeves 201, and the four insulating plates 401 are respectively sleeved on the inner wall of the small end cover 3, six limiting grooves are opened on the outer wall of the four insulating plates 401 close to the collector ring groove, and a plurality of clamping grooves are opened on the outer wall of the four insulating plates 401 away from the collector ring groove, and there are four insulating plates 401 between them. There are six connecting components 5, and the connecting components 5 include a brush box 501 with fixing holes on both sides of the outer wall, a carbon brush 502 embedded in the brush box 501 and a compression spring 503 with two ends respectively embedded in the two fixing holes, one side of the brush box 501 is clamped in the limiting groove, and the other side of the brush box 501 is clamped in two of the clamping grooves, one end of the compression spring 503 abuts against the outer wall of the carbon brush 502, and three annularly distributed terminal posts 6 are connected to the annular outer wall of the small end cover 3 by bolts, and the three terminal posts 6 are respectively connected to the collector ring 402 through the soft copper wire of the brush.

[0026] The three lead wires 202 are bent by the mold and welded to the three slip ring sleeves 201 respectively. The inner steel sleeve 101 and the inner insulating sleeve 102 are aligned and assembled. The slip ring sleeve 201 with the lead wires 202 is connected to the inter-ring insulating sleeve 203 and assembled to the outside of the inner insulating sleeve 102. Finally, it is basically completed after varnishing and glue filling. Each phase terminal 6 is connected to the collector ring through the soft copper wire of the brush. The corresponding compression spring 503 is installed in each brush box 501 to apply enough pressure to the conduction between the brush 502 and the slip ring sleeve 201. The brush box 501 and the insulating plate 401 are installed with insulating screws to ensure the overall performance and high reliability. The internal parts of the small end cover 3 are fixed to the end cover by 6 countersunk screws to ensure the integrity. After actual testing, the slip ring structure was tested for phase-to-phase and ground insulation at 160°C, and no breakdown or flashover occurred at 50Hz5000ACV.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A slip ring for a motor, comprising a mounting mechanism (1), characterized in that: The mounting mechanism (1) comprises an inner steel sleeve (101) and an inner insulating sleeve (102); A slip ring assembly (2) is provided outside the inner insulating sleeve (102), and the slip ring assembly (2) comprises three slip ring sleeves (201) each having a connection groove on an outer wall of one side, three leads (202) respectively fixed on the inner walls of the three slip ring sleeves (201), and two inter-ring insulating sleeves (203) respectively sleeved on the outer walls of the inner insulating sleeve (102); The slip ring sleeve (201) is provided with a small end cover (3) on the outside, and six installation openings are opened on the annular outer wall of the small end cover (3); An insulating assembly (4) is provided inside the small end cover (3), and the insulating assembly (4) comprises four insulating plates (401) each having a collector ring groove formed on an outer wall of one side thereof, and three collector rings (402) respectively embedded in three of the collector ring grooves; Six connecting components (5) are arranged between the four insulating plates (401), and the connecting components (5) include a brush box (501) with fixing holes opened on both side outer walls, a carbon brush (502) embedded in the brush box (501), and a compression spring (503) with two ends respectively embedded in the two fixing holes.

2. A slip ring for a motor according to claim 1, characterized in that: The outer wall of the inner insulating sleeve (102) is provided with three installation grooves, and the inner insulating sleeve (102) is sleeved on the outer wall of the inner steel sleeve (101).

3. A slip ring for a motor according to claim 2, characterized in that: The three slip ring sleeves (201) are respectively sleeved on the outer wall of the inner insulating sleeve (102), and the three lead wires (202) are respectively embedded in the three installation grooves, one end of the two inter-ring insulating sleeves (203) is respectively inserted into the connection grooves on two of the slip ring sleeves (201), and the two inter-ring insulating sleeves (203) are both arranged between the three slip ring sleeves (201).

4. A slip ring for a motor according to claim 1, characterized in that: One side of the small end cover (3) abuts against the outer wall of one side of the inner steel sleeve (101), and the small end cover (3) is connected to the outer wall of one side of the end cover by bolts.

5. The slip ring for a motor according to claim 1, characterized in that: The four insulating plates (401) are respectively sleeved on the outer walls of the three slip ring sleeves (201), and the four insulating plates (401) are respectively sleeved on the inner wall of the small end cover (3), six limiting grooves are opened on the outer walls of the four insulating plates (401) close to the collector ring groove, and a plurality of clamping grooves are opened on the outer walls of the four insulating plates (401) away from the collector ring groove.

6. A slip ring for a motor according to claim 5, characterized in that: One side of the brush box (501) is clamped in the limiting groove, and one side of the brush box (501) is clamped in two of the clamping grooves, and one end of the compression spring (503) is abutted against the outer wall of the carbon brush (502).

7. The slip ring for a motor according to claim 1, characterized in that: Three connecting posts (6) distributed in an annular shape are connected to the annular outer wall of the small end cover (3) via bolts, and the three connecting posts (6) are respectively connected to the collector ring (402) via brush soft copper wires.

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