CN216904600U

CN216904600U - Conducting device for hollow shaft

Info

Publication number: CN216904600U
Application number: CN202122523935.6U
Authority: CN
Inventors: 陈云松; 钱嘉诚; 王俊华
Original assignee: Wujiang Tianlong Electronic Machinery Equipment Co ltd
Current assignee: Wujiang Tianlong Electronic Machinery Equipment Co ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-07-05
Anticipated expiration: 2031-10-20

Abstract

The utility model discloses a conducting device for a hollow shaft, which relates to the technical field of bearing protection and comprises: the hollow shaft conductive device is fixedly arranged in the hollow motor shaft and the conductive brush is used for being contacted with the inner wall of the hollow motor shaft, so that in actual work, compared with a conductive ring in the prior art, the hollow shaft conductive device does not occupy the space of the side wall of the motor shaft any more, and further more working components can be additionally arranged on the motor shaft, therefore, the hollow shaft conductive device is high in applicability.

Description

Conducting device for hollow shaft

Technical Field

The utility model relates to the technical field of bearing protection, in particular to a conducting device for a hollow shaft.

Background

When the motor is subjected to frequency conversion, the on-shaft voltage is increased, because the generation of the voltage of the shaft of the frequency conversion motor is caused by the driving of the frequency converter, and the current output by the frequency converter causes the generation of induced voltage on the shaft of the motor due to the action of the high-frequency switch; the generated shaft voltage is released through a bearing by current, and in the releasing process of the current, along with the accumulation of static charges, once the induced voltage on the motor shaft is accumulated to be enough to break through an oil film between the bearing balls, the induced voltage is discharged through a loop with the minimum resistance, so that the surfaces of the bearing race, the bearing balls and the track are corroded electrically, and the corrosion process is slow; in addition, in the process, the power of the motor is obviously less and less, when the motor stops working, the motor bearing is damaged, the grease is blackened, electric corrosion pits appear on the surfaces of a bearing race and a ball, particles of the electric corrosion pit layer are sealed in the bearing by a closed bearing, and the service life of the motor bearing is shortened due to the fact that the reasons are accelerated finally.

Therefore, in order to prevent the occurrence of the above-mentioned galvanic corrosion phenomenon, it is necessary to add a conductive device to the motor shaft, however, the existing conductive devices are all ring-shaped and are used for being annularly arranged on the periphery of the motor shaft, which results in the conductive ring occupying the lateral space of the shaft extension end of the motor shaft, and results in the usable space of the shaft extension end of the motor shaft becoming less, therefore, the applicability of the conductive device in the prior art is poor.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a conductive device for a hollow shaft, which solves the above problems of the prior art and improves the applicability.

In order to achieve the purpose, the utility model provides the following scheme:

the utility model provides a conductive device for a hollow shaft, which comprises: the fixing part is used for fixedly arranging the conductive brushes in the hollow motor shaft, and the conductive brushes are used for contacting with the inner wall of the hollow motor shaft.

Preferably, each of the conductive brushes includes a clamping sleeve and a plurality of conductive fibers, one end of each of the plurality of conductive fibers is clamped in the clamping sleeve, the plurality of conductive fibers are integrally bundled, and the clamping sleeve is fixedly disposed in the fixing member.

Preferably, a plurality of accommodating holes are formed in the fixing member, one of the clamping sleeves is arranged in each accommodating hole, and one end, far away from the clamping sleeve, of the conductive fiber extends out of the accommodating hole.

Preferably, the fixed part is annular, and the outside border of fixed part is provided with a plurality of holding hole.

Preferably, the mounting includes two annular plates, two annular plate parallel and coaxial setting, two annular plate can connect, one annular plate orientation is another seted up a plurality of first storage tanks on the terminal surface of annular plate, and is a plurality of first storage tank edge one with the coaxial circumference of annular plate is laid on the annular plate, just first storage tank extends to the outside border of annular plate first storage tank upper cover is established and is not established first storage tank form behind the annular plate the holding hole.

Preferably, the fixing piece is columnar, and at least one row of accommodating holes is formed in the fixing piece along the axial direction of the fixing piece.

Preferably, the fixing member is provided with two rows of the accommodating holes, and the two rows of the accommodating holes are respectively positioned at two ends of one diameter of the fixing member.

Preferably, the mounting includes two cylinders, two the cross section of cylinder all is semicircular, two the cylinder is parallel and relative setting, two the cylinder can be connected with dismantling, one the cylinder is towards another a plurality of second storage tanks have been seted up to both sides on the terminal surface of cylinder, just the second storage tank extends to the border of cylinder the second storage tank upper cover is established not establish the second storage tank form behind the cylinder the holding hole.

Preferably, each of the second receiving grooves on one side of the column body and the second receiving grooves on the other side of the column body are arranged in pairs, the two second receiving grooves which are arranged in any pair are communicated with each other to form a third receiving groove, and the cross sections of the third receiving grooves are identical.

Preferably, the conductive fibers are carbon fibers.

Compared with the prior art, the utility model has the following technical effects:

the conducting device for the hollow shaft is fixedly arranged in the hollow motor shaft, and the conducting brush is used for being in contact with the inner wall of the hollow motor shaft, so that in the actual work, compared with a conducting ring in the prior art, the conducting device for the hollow shaft does not occupy the space of the side wall of the motor shaft any more, and further more working components can be additionally arranged on the motor shaft.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a conductive device for a hollow shaft according to a first embodiment;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic structural diagram of a conductive device for a hollow shaft according to a second embodiment;

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

in the figure: 1-fixing piece, 11-column body, 12-annular plate, 2-conductive brush, 21-conductive fiber and 22-clamping sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model aims to provide a conducting device for a hollow shaft, which is used for solving the problems in the prior art and has high applicability.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Example one

The embodiment provides a conductive device for a hollow shaft, as shown in fig. 1 to 3, including: mounting 1 and a plurality of electrically conductive brush 2, a plurality of electrically conductive brush 2 are all fixed to be set up on mounting 1, and mounting 1 is used for fixed setting in the hollow motor axle and electrically conductive brush 2 is used for contacting with the inner wall of hollow motor axle.

The conducting device for the hollow shaft provided by the embodiment is fixedly arranged in the hollow motor shaft, and the conducting brush 2 is used for contacting with the inner wall of the hollow motor shaft, so that in the actual work, compared with a conducting ring in the prior art, the conducting brush does not occupy the space of the side wall of the motor shaft any more, and further more working components can be additionally arranged on the motor shaft, therefore, the conducting device for the hollow shaft has high applicability.

Further, each conductive brush 2 all includes hooping cover 22 and a plurality of conductive fiber 21, the one end of a plurality of conductive fiber 21 is all hooped tightly in hooping cover 22, a plurality of conductive fiber 21 are wholly in the form of restrainting, hooping cover 22 is fixed to be set up in mounting 1, hoop cover 22 is used in advance to hoop a plurality of conductive fiber 21 and is in the form of restrainting, again with a plurality of conductive brush 2 that are in the form of restrainting pass through mounting 1 fixed connection as an organic whole, the stability of structure has been strengthened in the above-mentioned setting, the phenomenon that conductive fiber 2121 appears droing in the prevention of use.

Furthermore, a plurality of accommodating holes are formed in the fixing member 1, a clamping sleeve 22 is arranged in each accommodating hole, one end, far away from the clamping sleeve 22, of the conductive fiber 21 extends out of the accommodating hole so as to fix the clamping sleeve 22, and one of interference fit, brazing and threaded fastening is adopted in each accommodating hole to fix the clamping sleeve 22.

Further, the fixing member 1 is ring-shaped, preferably ring-shaped, the fixing member 1 is fixed on a supporting body in a hollow motor shaft through a plurality of bolts, a plurality of accommodating holes are formed in the outer side edge of the fixing member 1, the accommodating holes are uniformly distributed along the circumferential direction of the fixing member 1, each conductive brush 2 is arranged along the radial direction of the ring-shaped fixing member 1, and the fixing member 1 and the motor shaft are arranged coaxially.

Further, the fixing member 1 includes two annular plates 12, the two annular plates 12 are parallel and coaxially disposed, the two annular plates 12 can be detachably connected, preferably, the two annular plates are connected by bolts, a plurality of first accommodating grooves are formed in the end face, facing the other annular plate 12, of one annular plate 12, the first accommodating grooves are arranged on the annular plate 12 along a circumference coaxial with the annular plate 12, the first accommodating grooves extend to the outer side edge of the annular plate 12, and accommodating holes are formed in the first accommodating grooves after the annular plate 12 without the first accommodating grooves is arranged on the upper cover of the first accommodating grooves.

Further, the conductive fibers 21 are carbon fibers, and the area of the cross section of each conductive fiber 21 is 1.7-2 mm²。

Further, the size of the notch of the first receiving groove is slightly smaller than the size of the inside of the first receiving groove, so as to limit the clamping sleeve 22.

Example two

As shown in fig. 2 to 6, the difference between the present embodiment and the first embodiment is that a fixing member 1 of the conductive device for a hollow shaft is cylindrical, and at least one row of accommodating holes is disposed on the fixing member 1 along an axial direction of the fixing member 1.

Furthermore, two rows of accommodating holes are formed in the fixing member 1, the two rows of accommodating holes are respectively located at two ends of one diameter of the fixing member 1, the fixing member 1 and the motor shaft are coaxially arranged, and the conducting device for the hollow shaft provided by the embodiment can enable the inner wall of the motor shaft to be fully contacted with the conducting fibers 21 so as to improve the conducting effect.

Further, the fixing member 1 includes two columns 11, cross sections of the two columns 11 are semicircular, the two columns 11 are parallel and opposite to each other, the two columns 11 can be detachably connected, a plurality of second accommodating grooves are formed in two sides of one column 11 facing the end face of the other column 11, the second accommodating grooves extend to edges of the columns 11, and accommodating holes are formed in the second accommodating grooves and covered with the columns 11 without the second accommodating grooves.

Furthermore, each second accommodating groove on one side of the column body 11 and each second accommodating groove on the other side of the column body 11 are arranged in a pairwise opposite manner, and the two second accommodating grooves which are arranged in an arbitrary opposite manner are communicated with each other to form a third accommodating groove, so that the integral processing can be carried out.

Further, the size of the notch of the third accommodating groove is slightly smaller than the size of the inside of the third accommodating groove, so as to limit the clamping sleeve 22.

The principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the foregoing, the description is not to be taken in a limiting sense.

Claims

1. An electrically conductive device for a hollow shaft, characterized in that: the method comprises the following steps: the fixing part is used for fixedly arranging the conductive brushes in the hollow motor shaft, and the conductive brushes are used for contacting with the inner wall of the hollow motor shaft.

2. The electrically conductive device for the hollow shaft according to claim 1, wherein: each conductive brush all includes hoop cover and a plurality of conductive fiber, and a plurality of conductive fiber's one end all is cramped in the hoop cover, and a plurality of conductive fiber wholly is the bundle form, hoop cover fixed set up in the mounting.

3. The electrically conductive device for the hollow shaft according to claim 2, wherein: the fixing piece is internally provided with a plurality of accommodating holes, each accommodating hole is fixedly provided with one clamping sleeve, and one end of the conductive fiber, which is far away from the clamping sleeve, extends out of the accommodating hole.

4. The electrically conductive device for the hollow shaft according to claim 3, characterized in that: the mounting is the annular, the outside border of mounting is provided with a plurality ofly the holding hole.

5. The electrically conductive device for the hollow shaft according to claim 4, characterized in that: the mounting includes two annular plates, two annular plate parallel and coaxial setting, two the annular plate can be connected with dismantling, one the annular plate is towards another a plurality of first storage tanks have been seted up on the terminal surface of annular plate, it is a plurality of first storage tank along one with the coaxial circumference of annular plate is laid on the annular plate, just first storage tank extends to the outside border of annular plate first storage tank upper cover is established not first storage tank form behind the annular plate the holding hole.

6. The electrically conductive device for the hollow shaft according to claim 3, characterized in that: the fixing piece is columnar, and at least one row of accommodating holes are formed in the fixing piece in the axial direction of the fixing piece.

7. The electrically conductive device for the hollow shaft according to claim 6, characterized in that: the fixing piece is provided with two rows of accommodating holes, and the two rows of accommodating holes are respectively positioned at two ends of one diameter of the fixing piece.

8. The electrically conductive device for the hollow shaft according to claim 7, characterized in that: the mounting includes two cylinders, two the cross section of cylinder all is semicircular, two the cylinder is parallel and relative setting, two the cylinder can be connected with dismantling, one the cylinder is towards another a plurality of second storage tanks have been seted up to both sides on the terminal surface of cylinder, just the second storage tank extends to the border of cylinder the second storage tank upper cover is established not establish the second storage tank form behind the cylinder the holding hole.

9. The electrically conductive device for the hollow shaft according to claim 8, wherein: the second accommodating grooves on one side of the column body and the second accommodating grooves on the other side of the column body are arranged in pairs in an opposite mode, and the two second accommodating grooves which are arranged in any opposite mode are communicated with each other to form a third accommodating groove.

10. The electrically conductive device for the hollow shaft according to claim 2, characterized in that: the conductive fibers are carbon fibers.