Embedded conductive device

Abstract

The present invention relates to the technical field of motor conductive devices. Disclosed is an embedded conductive device, comprising an annular outer cover, bundle brush conductive rings and a first locking ring. At least two bundle brush conductive rings are sequentially arranged on the annular outer cover, the first locking ring presses each bundle brush conductive ring on the annular outer cover, and conductive gaskets are provided between every two adjacent bundle brush conductive rings and between the first locking ring and the bundle brush conductive ring adjacent to the first locking ring; and a soft conductive bundle brush group and / or a hard conductive bundle brush group which are in interference contact with a motor shaft are fixedly arranged on each bundle brush conductive ring, and all the bundle brush conductive rings cannot be provided with only soft conductive bundle brush groups or hard conductive bundle brush groups simultaneously. The embedded conductive device provided by the present invention can improve the effect of contact with the motor shaft and avoid the electric corrosion of a motor bearing.

Description

A kind of embedded conductive device Technical Field

[0001] The present invention relates to the technical field of motor conductive devices, and in particular to an embedded conductive device. Background Art

[0002] The shaft voltage of a variable-frequency motor is generated by the inverter drive. The inverter's output current, due to the high-frequency switching, generates an induced voltage on the motor shaft. As static charge accumulates, once the induced voltage on the motor shaft reaches a level sufficient to penetrate the oil film between the bearing balls, it will discharge through the circuit with the lowest resistance, causing electrical corrosion pits between the bearing balls and the track. Simultaneously, the high-speed rolling of the bearing will quickly fill the entire bearing track with corrosion pits. Therefore, it is necessary to promptly conduct the charge on the motor shaft to extend the bearing's service life. However, existing motor shaft conductive rings, whose conductive cluster brushes are made of conductive fiber bundles of the same hardness, are prone to wear after prolonged use, resulting in a reduced contact area with the motor shaft and a failure to promptly conduct the charge on the motor shaft.

[0003] Summary of the Invention

[0004] The object of the present invention is to provide an embedded conductive device to solve the problems existing in the above-mentioned prior art, thereby improving the contact effect with the motor shaft and avoiding electrical corrosion of the motor bearings.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides an embedded conductive device, comprising an annular outer cover, a clustering brush conductive ring and a first locking ring, at least two of the clustering brush conductive rings are sequentially arranged on the annular outer cover, the first locking ring presses each of the clustering brush conductive rings onto the annular outer cover, conductive gaskets are provided between two adjacent clustering brush conductive rings and between the first locking ring and the clustering brush conductive ring adjacent to the first locking ring; each of the clustering brush conductive rings is fixed with a soft conductive clustering brush group and / or a hard conductive clustering brush group that is in interference contact with the motor shaft, and all of the clustering brush conductive rings cannot be provided with only the soft conductive clustering brush group or the hard conductive clustering brush group at the same time.

[0007] Preferably, a first sealing ring is provided between the first locking ring and the conductive gasket adjacent to the first locking ring, and a second sealing ring and a second locking ring are provided in sequence on the side of the annular outer cover facing away from the clustering brush conductive ring, and the second locking ring presses the second sealing ring onto the annular outer cover; the first sealing ring and the second sealing ring are both connected to the motor shaft by interference fit, and each of the clustering brush conductive rings is arranged between the first sealing ring and the second sealing ring.

[0008] Preferably, the annular outer cover is provided with a fixing hole for fixing to the motor housing, and the annular outer cover is fixed to the motor housing by passing bolts through the fixing hole.

[0009] Preferably, the interference fit between the soft conductive clustered brush group and the hard conductive clustered brush group and the motor shaft is the same.

[0010] Preferably, the soft conductive clustering brush group includes a plurality of soft conductive clustering brushes of different lengths, and the hard conductive clustering brush group includes a plurality of hard conductive clustering brushes of different lengths. The interference fit between each soft conductive clustering brush and each hard conductive clustering brush and the motor shaft is the same.

[0011] Preferably, two clustering brush conductive rings are sequentially arranged on the annular outer cover, namely the first clustering brush conductive ring and the second clustering brush conductive ring; the first clustering brush conductive ring is evenly arranged with multiple soft conductive clustering brushes along the circumference, and the second clustering brush conductive ring is evenly arranged with multiple hard conductive clustering brushes along the circumference.

[0012] Preferably, the soft conductive clustering brushes of the same length are continuously arranged on the first clustering brush conductive ring, and the hard conductive clustering brushes of the same length are continuously arranged on the second clustering brush conductive ring.

[0013] Preferably, the first clustering brush conductive ring is provided with a first fixing groove for fixing each of the soft conductive clustering brushes, and the second clustering brush conductive ring is provided with a second fixing groove for fixing each of the hard conductive clustering brushes.

[0014] Preferably, the soft conductive clustering brush is made by arranging two layers of 24K fine carbon fibers in a steel tube and then compressing the steel tube; the hard conductive clustering brush is made by arranging two layers of 24K hard carbon fibers in a steel tube and then compressing the steel tube.

[0015] Preferably, the annular outer cover, each of the clustering brush conductive rings and each of the conductive gaskets are connected and fixed by a plurality of conductive sleeves, and the annular outer cover, each of the clustering brush conductive rings and each of the conductive gaskets are provided with a plurality of locking holes for the conductive sleeves to pass through and which are evenly distributed along the circumference.

[0016] Preferably, the conductive sleeve is a copper sleeve.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] The inlaid conductive device provided by the present invention combines a soft conductive clustered brush group and a hard conductive clustered brush group for use. The hard conductive clustered brush can provide good conductivity and oil drainage capabilities in the short term, but wears out faster. The soft conductive clustered brush is wear-resistant but is easily blocked by oil, resulting in unstable conductive performance. Therefore, the combination of the two can meet the long-term good conductive effect, thereby improving the contact effect with the motor shaft and avoiding electrical corrosion of the motor bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] FIG1 is a schematic diagram of the exploded structure of the embedded conductive device provided by the present invention;

[0021] FIG2 is a partial cross-sectional view of the embedded conductive device provided by the present invention;

[0022] FIG3 is a front view of the annular outer cover of the present invention;

[0023] FIG4 is a cross-sectional view of the annular outer cover taken along line AA in FIG3 ;

[0024] FIG5 is a partial enlarged schematic diagram of portion B in FIG4 ;

[0025] FIG6 is a front view of the first cluster brush conductive ring of the present invention;

[0026] FIG7 is a front view of the second cluster brush conductive ring of the present invention;

[0027] FIG8 is a front view of the conductive gasket of the present invention.

[0028] In the figure: 100-mosaic conductive device, 1-annular outer cover, 2-first locking ring, 3-conductive gasket, 4-fixing hole, 5-first sealing ring, 6-second sealing ring, 7-second locking ring, 8-first cluster brush conductive ring, 9-second cluster brush conductive ring, 10-soft conductive cluster brush, 11-hard conductive cluster brush, 12-first fixing groove, 13-second fixing groove, 14-locking hole. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The object of the present invention is to provide an embedded conductive device to solve the problems existing in the prior art, thereby improving the contact effect with the motor shaft and avoiding electrical corrosion of the motor bearings.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] As shown in Figures 1 to 8, this embodiment provides an embedded conductive device 100, including an annular outer cover 1, a clustering brush conductive ring and a first locking ring 2. At least two clustering brush conductive rings are arranged on the annular outer cover 1 in sequence. The first locking ring 2 presses each clustering brush conductive ring onto the annular outer cover 1. Conductive gaskets 3 are provided between two adjacent clustering brush conductive rings and between the first locking ring 2 and the clustering brush conductive ring adjacent to the first locking ring 2; each clustering brush conductive ring is fixed with a soft conductive clustering brush group and / or a hard conductive clustering brush group that is in interference contact with the motor shaft, and all clustering brush conductive rings cannot be provided with only soft conductive clustering brush groups or hard conductive clustering brush groups at the same time.

[0033] In this embodiment, a first sealing ring 5 is provided between the first locking ring 2 and the conductive gasket 3 adjacent to the first locking ring 2. A second sealing ring 6 and a second locking ring 7 are provided in sequence on the side of the annular outer cover 1 facing away from the conductive ring of the cluster brush. The second locking ring 7 presses the second sealing ring 6 onto the annular outer cover 1. The first sealing ring 5 and the second sealing ring 6 are both connected to the motor shaft by interference fit, and each conductive ring of the cluster brush is arranged between the first sealing ring 5 and the second sealing ring 6. By using the first sealing ring 5 and the second sealing ring 6, the conductive brushes on each conductive ring of the cluster brush are sealed, which can improve the protection level of the equipment and avoid the problem that the carbon fiber powder after the conductive brush is worn will contaminate the equipment grease. It can also prevent the conductive brush from being soaked in grease. The carbon fiber powder after wear still exists in the conductive closed cavity and can still participate in the conductive link when moving, thereby improving the conductive effect and life of the conductive ring. Among them, the first locking ring 2 and the second locking ring 7 are connected to the annular outer cover 1 by interference fit.

[0034] In this embodiment, the annular outer cover 1 is provided with fixing holes 4 for fixing to the motor housing, and the annular outer cover 1 is fixed to the motor housing by bolts passing through the fixing holes 4. In other embodiments, the annular outer cover 1 and the motor housing can also be installed using an interference fit connection method.

[0035] In this embodiment, two clustering brush conductive rings are sequentially provided on the annular outer cover 1 , namely a first clustering brush conductive ring 8 and a second clustering brush conductive ring 9 .

[0036] In this embodiment, the first cluster brush conductive ring 8 and the second cluster brush conductive ring 9 have the same structure. A soft conductive cluster brush group is provided on the first cluster brush conductive ring 8, and a hard conductive cluster brush group is provided on the second cluster brush conductive ring 9. This device uses a combination of a soft conductive cluster brush group and a hard conductive cluster brush group. The hard conductive cluster brush can provide good conductivity and oil drainage in the short term, but wears out quickly. The soft conductive cluster brush is wear-resistant but is easily blocked by oil, resulting in unstable conductivity. Therefore, the combination of the two can meet the long-term good conductivity effect, thereby improving the contact effect with the motor shaft and avoiding electrical corrosion of the motor bearings. In other embodiments, a hard conductive bunching brush group can be arranged on the first bunching brush conductive ring 8, and a soft conductive bunching brush group can be arranged on the second bunching brush conductive ring 9, or a soft conductive bunching brush group and a hard conductive bunching brush group can be arranged on the first bunching brush conductive ring 8, and a soft conductive bunching brush group or a hard conductive bunching brush group can be arranged on the second bunching brush conductive ring 9; or a soft conductive bunching brush group or a hard conductive bunching brush group can be arranged on the first bunching brush conductive ring 8, and a soft conductive bunching brush group and a hard conductive bunching brush group can be arranged on the second bunching brush conductive ring 9; or a soft conductive bunching brush group and a hard conductive bunching brush group can be arranged on both the first bunching brush conductive ring 8 and the second bunching brush conductive ring 9.

[0037] In this embodiment, the interference fit between the soft conductive cluster brush assembly and the hard conductive cluster brush assembly and the motor shaft is the same. In other embodiments, the interference fit between the soft conductive cluster brush assembly and the hard conductive cluster brush assembly and the motor shaft may also be different.

[0038] In this embodiment, the soft conductive clustering brush set includes multiple soft conductive clustering brushes 10 of varying lengths, and the hard conductive clustering brush set includes multiple hard conductive clustering brushes 11 of varying lengths. Each soft conductive clustering brush 10 and each hard conductive clustering brush 11 has the same interference fit with the motor shaft. Specifically, the soft conductive clustering brush set includes three soft conductive clustering brush 10 lengths: 11mm, 9.5mm, and 8mm; the hard conductive clustering brush set includes three hard conductive clustering brush lengths: 11mm, 9.5mm, and 8mm.

[0039] In this embodiment, the first cluster brush conductive ring 8 is evenly provided with multiple soft conductive cluster brushes 10 along the circumference, and the second cluster brush conductive ring 9 is evenly provided with multiple hard conductive cluster brushes 11 along the circumference. The soft conductive cluster brushes 10 correspond to the hard conductive cluster brushes 11 one-to-one, and the number of soft conductive cluster brushes 10 and hard conductive cluster brushes 11 of the same length is equal and corresponds one-to-one.

[0040] In this embodiment, soft conductive clustering brushes 10 of the same length are continuously arranged on the first clustering brush conductive ring 8, and hard conductive clustering brushes 11 of the same length are continuously arranged on the second clustering brush conductive ring 9. This facilitates the production of the first clustering brush conductive ring 8 and the second clustering brush conductive ring 9, and facilitates the installation of each soft conductive clustering brush 10 and the hard conductive clustering brush 11.

[0041] In this embodiment, the first cluster brush conductive ring 8 is provided with first fixing grooves 12 for fixing each soft conductive cluster brush 10, and the second cluster brush conductive ring 9 is provided with second fixing grooves 13 for fixing each hard conductive cluster brush 11. Specifically, the first cluster brush conductive ring 8 is fixed with three soft conductive cluster brushes 10 of different lengths, which are 11 mm, 9.5 mm and 8 mm respectively; the second cluster brush conductive ring 9 is fixed with three hard conductive cluster brushes 11 of different lengths, which are 11 mm, 9.5 mm and 8 mm respectively. A plurality of 11mm soft conductive clustering brushes 10 are installed in the first fixed groove 12 with an inner diameter of φ186 on the first clustering brush conductive ring 8, a plurality of 9.5mm soft conductive clustering brushes 10 are installed in the first fixed groove 12 with an inner diameter of φ183 on the first clustering brush conductive ring 8, and a plurality of 8mm soft conductive clustering brushes 10 are installed in the first fixed groove 12 with an inner diameter of φ180 on the first clustering brush conductive ring 8, thereby ensuring that the interference between the three soft conductive clustering brushes 10 and the motor shaft is the same; a plurality of 11mm hard conductive clustering brushes 11 are installed in the second fixed groove 13 with an inner diameter of φ186 on the second clustering brush conductive ring 9, and a plurality of 9.5mm The hard conductive clustering brush 11 is installed in the second fixed groove 13 with an inner diameter of φ183 on the second clustering brush conductive ring 9, and multiple 8mm hard conductive clustering brushes 11 are installed in the second fixed groove 13 with an inner diameter of φ180 on the second clustering brush conductive ring 9, thereby ensuring that the interference fit between the three hard conductive clustering brushes 11 and the motor shaft is the same, and the interference fit between the three lengths of soft conductive clustering brushes 10 and the motor shaft remains the same.

[0042] In this embodiment, the soft conductive bunching brush 10 is made by placing two layers of 24K fine carbon fibers inside a steel pipe and then compressing the steel pipe; the hard conductive bunching brush 11 is made by placing two layers of 24K hard carbon fibers inside a steel pipe and then compressing the steel pipe. This makes production quick and easy, improving production efficiency.

[0043] In this embodiment, the annular outer cover 1, each cluster brush conductive ring (first cluster brush conductive ring 8 and second cluster brush conductive ring 9), and each conductive gasket 3 are connected and fixed via multiple conductive sleeves. The annular outer cover 1, each cluster brush conductive ring, and each conductive gasket 3 are each provided with multiple locking holes 14 uniformly distributed along the circumference for each conductive sleeve to pass through. The multiple conductive sleeves interconnect to provide a more secure connection. During use, the conductive sleeves can transmit electricity from the motor shaft to the annular outer cover 1, and then the electricity is directed to the grounded motor housing through the annular outer cover 1.

[0044] In this embodiment, the conductive sleeve is a copper sleeve. The copper sleeve has stable performance and low resistance, which is conducive to the transmission of electricity.

[0045] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An inlaid conductive device, characterized in that: It includes an annular outer cover, a bundled brush conducting ring, and a first locking ring. At least two of the bundled brush conducting rings are sequentially arranged on the annular outer cover, and the first locking ring presses each of the bundled brush conducting rings against the annular outer cover. Conductive gaskets are provided between adjacent two of the bundled brush conducting rings and between the first locking ring and the bundled brush conducting ring adjacent to the first locking ring. On each of the bundled brush conducting rings, a soft conductive bundled brush group and / or a hard conductive bundled brush group that is in interference fit with the motor shaft is fixedly provided, and all of the bundled brush conducting rings cannot only be provided with the soft conductive bundled brush group or the hard conductive bundled brush group at the same time.

2. The inlaid conductive device according to claim 1, wherein: A first sealing ring is provided between the first locking ring and the conductive gasket adjacent to the first locking ring. On the side of the annular outer cover facing away from the bundled brush conducting ring, a second sealing ring and a second locking ring are sequentially provided, and the second locking ring presses the second sealing ring against the annular outer cover. Both the first sealing ring and the second sealing ring are in interference fit connection with the motor shaft, and each of the bundled brush conducting rings is arranged between the first sealing ring and the second sealing ring.

3. The inlaid conductive device according to claim 1, wherein: The annular outer cover is provided with fixing holes for fixedly installing with the motor housing, and the annular outer cover is fixed to the motor housing by bolts passing through the fixing holes.

4. The inlaid conductive device according to claim 1, wherein: The interference amounts of the soft conductive bundled brush group and the hard conductive bundled brush group with the motor shaft are the same.

5. The inlaid conductive device according to claim 1, wherein: The soft conductive bundled brush group includes a variety of soft conductive bundled brushes with different lengths, and the hard conductive bundled brush group includes a variety of hard conductive bundled brushes with different lengths. The interference amounts of each of the soft conductive bundled brushes and each of the hard conductive bundled brushes with the motor shaft are the same.

6. The inlaid conductive device according to claim 5, characterized in that: Two of the bundled brush conducting rings are sequentially arranged on the annular outer cover, which are a first bundled brush conducting ring and a second bundled brush conducting ring respectively. A plurality of the soft conductive bundled brushes are uniformly arranged along the circumference on the first bundled brush conducting ring, and a plurality of the hard conductive bundled brushes are uniformly arranged along the circumference on the second bundled brush conducting ring.

7. The inlaid conductive device according to claim 6, wherein: The soft conductive bundled brushes with the same length are continuously arranged on the first bundled brush conducting ring, and the hard conductive bundled brushes with the same length are continuously arranged on the second bundled brush conducting ring.

8. The inlaid conductive device according to claim 6, wherein: The first bundled brush conducting ring is provided with first fixing grooves for respectively fixing each of the soft conductive bundled brushes, and the second bundled brush conducting ring is provided with second fixing grooves for respectively fixing each of the hard conductive bundled brushes.

9. The inlaid conductive device according to claim 5, characterized in that: The soft conductive bundled brush is made by compressing a steel pipe after arranging 2 layers of 24K fine carbon fibers in the steel pipe; the hard conductive bundled brush is made by compressing a steel pipe after arranging 2 layers of 24K hard carbon fibers in the steel pipe.

10. The inlaid conductive device according to claim 2, wherein: The annular outer cover, each of the bundled brush conducting rings, and each of the conductive gaskets are fixedly connected by a plurality of conductive sleeves. A plurality of locking holes for the conductive sleeves to pass through and uniformly distributed along the circumference are provided on the annular outer cover, each of the bundled brush conducting rings, and each of the conductive gaskets.

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