CN219107201U - Bearing electric corrosion inhibition structure, motor and vehicle - Google Patents

Abstract

The utility model relates to a bearing electric corrosion inhibition structure, a motor and a vehicle, wherein the motor comprises: the device comprises a shell, a main shaft, a bearing and a conductive assembly. At least part the main shaft is located in the casing and relatively the casing is rotatable, the inner race cover of bearing is established on the main shaft, the outer lane of bearing with the inner wall of casing offsets, electrically conductive subassembly is located in the casing, electrically conductive subassembly includes first electrically conductive seat, second electrically conductive seat and the electrically conductive piece of elasticity, first electrically conductive seat is installed on the casing, the second electrically conductive seat is installed in the one end of main shaft, the both ends of electrically conductive piece of elasticity respectively with first electrically conductive seat with the electrically conductive seat electricity of second is connected. The bearing electric corrosion inhibition structure can inhibit bearing electric corrosion, avoid main shaft abrasion, and has simple structure and lower cost.

Description

Bearing electric corrosion inhibition structure, motor and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a bearing electric corrosion inhibition structure, a motor and a vehicle.

Background

When the frequency converter system is used for supplying power, the frequency conversion driven motor can generate a high-frequency common-mode voltage, and due to the voltage division effect of parasitic capacitance in the electric drive system, a voltage difference exists between the inner ring and the outer ring of the bearing. When the voltage difference exceeds the bearing oil film critical voltage, the bearing oil film is broken down, causing mechanical failure of the bearing, i.e., bearing electric corrosion. The bearing electric corrosion can cause pits to be formed on the raceways of the inner ring and the outer ring of the bearing, and the appearance of the washboard lines finally appears due to the vibration of the bearing in the running process, so that NVH (noise, vibration and harshness) of the bearing is deteriorated, and even the service life of the bearing is shortened.

In the related art, a common way for bearing electric corrosion is to install a conductive ring or a brush at one end of a main shaft, but the above solution has the problem of wearing the main shaft, which has high cost and poor use effect.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the utility model provides the bearing electric corrosion inhibition structure which can inhibit bearing electric corrosion, avoid main shaft abrasion, and has simple structure and lower cost.

The embodiment of the utility model also provides a motor.

The embodiment of the utility model also provides a vehicle.

An embodiment of the present utility model provides a bearing electric corrosion inhibition structure including: a housing; the main shaft is at least partially arranged in the shell and can rotate relative to the shell; the inner ring of the bearing is sleeved on the main shaft, and the outer ring of the bearing abuts against the inner wall of the shell; the conductive assembly is positioned in the shell and comprises a first conductive seat, a second conductive seat and an elastic conductive piece, wherein the first conductive seat is arranged on the shell, the second conductive seat is arranged at one end of the main shaft, and two ends of the elastic conductive piece are respectively electrically connected with the first conductive seat and the second conductive seat.

According to the bearing electric corrosion inhibition structure provided by the embodiment of the utility model, the voltage conduction path on the main shaft can sequentially pass through the second conductive seat, the elastic conductive piece, the first conductive seat and the shell, and the bearing outer ring is propped against the shell, so that the bearing inner ring and the bearing outer ring cannot establish higher shaft voltage, an oil film cannot be broken down, and the electric corrosion of the bearing is effectively inhibited. In addition, the elastic conductive piece is propped against the main shaft through the second conductive seat, so that the risk of main shaft abrasion caused by direct propping of the elastic conductive piece against the main shaft can be avoided, and the service life of the main shaft is prolonged. And because the elastic conductive piece has elasticity, axial tolerance and fluctuation in the assembly process or the working process of the main shaft can be compensated, so that the reliability of the electric contact of the first conductive seat and the second conductive seat is ensured. Therefore, the bearing electric corrosion inhibition structure provided by the embodiment of the utility model can inhibit bearing electric corrosion, avoid main shaft abrasion, and has the advantages of simple structural design and lower manufacturing and later maintenance cost.

In some embodiments, the elastic conductive member includes a spring and a conductive block, one end of the spring is connected to the first conductive seat, the other end of the spring is connected to the conductive block, the spring presses the conductive block toward the direction of the spindle, and the conductive block abuts against the second conductive seat.

In some embodiments, the conductive block has an arcuate contact portion that abuts the second conductive mount; or the conductive block is a conductive steel ball, and the conductive steel ball is propped against the second conductive seat; or, the conductive block is a conductive cylinder, and one end of the conductive cylinder along the axial direction of the conductive cylinder abuts against the second conductive seat.

In some embodiments, the elastic conductive element is on the same axis as the spindle.

In some embodiments, the housing has an end cap, the end of the spindle adjacent the end cap is opposite the end cap, the first conductive mount is disposed on the end cap, the second conductive mount is disposed on the end of the spindle adjacent the end cap, the first conductive mount and the second conductive mount are spaced apart along an axial direction of the spindle, and the elastic conductive member is disposed between the first conductive mount and the second conductive mount.

In some embodiments, a cavity is provided at an end of the spindle adjacent to the end cap, the second conductive seat is a liner plate, and the liner plate is disposed in the cavity.

In some embodiments, a cross-section of the first conductive mount orthogonal to the spindle axis is less than a cross-section of the cavity orthogonal to the spindle axis, and the first conductive mount is arranged coaxially with the cavity; and/or, a guide channel is arranged in the first conductive seat, the guide channel extends along the axial direction of the main shaft, and at least part of the elastic conductive piece is arranged in the guide channel.

In some embodiments, the first conductive mount is removably connected to the end cap and/or the second conductive mount is removably connected to the spindle.

According to another embodiment of the present utility model, an electric machine includes: the bearing electric corrosion inhibiting structure according to any one of the above embodiments.

According to the motor provided by the embodiment of the utility model, the voltage conduction path on the main shaft of the motor can sequentially pass through the second conductive seat, the elastic conductive piece, the first conductive seat and the shell, and the bearing outer ring is propped against the shell, so that the bearing inner ring and the bearing outer ring cannot establish higher shaft voltage, an oil film cannot be broken down, and the electric corrosion of the bearing is effectively inhibited. In addition, the elastic conductive piece is propped against the main shaft through the second conductive seat, so that the risk of main shaft abrasion caused by direct propping of the elastic conductive piece against the main shaft can be avoided, and the service life of the main shaft is prolonged. And because the elastic conductive piece has elasticity, axial tolerance and fluctuation in the assembly process or the working process of the main shaft can be compensated, so that the reliability of the electric contact of the first conductive seat and the second conductive seat is ensured. Therefore, the motor provided by the embodiment of the utility model can inhibit bearing electric corrosion, avoid main shaft abrasion, and has the advantages of simple structural design and lower manufacturing and later maintenance cost.

A vehicle according to another embodiment of the present utility model includes: the bearing galvanic corrosion barrier structure or motor of any of the above embodiments.

According to the vehicle provided by the embodiment of the utility model, the voltage conduction path on the main shaft of the motor can sequentially pass through the second conductive seat, the elastic conductive piece, the first conductive seat and the shell, and the bearing outer ring is propped against the shell, so that the bearing inner ring and the bearing outer ring cannot establish higher shaft voltage, an oil film cannot be broken down, and the electric corrosion of the bearing is effectively inhibited. In addition, the elastic conductive piece is propped against the main shaft through the second conductive seat, so that the risk of main shaft abrasion caused by direct propping of the elastic conductive piece against the main shaft can be avoided, and the service life of the main shaft is prolonged. And because the elastic conductive piece has elasticity, axial tolerance and fluctuation in the assembly process or the working process of the main shaft can be compensated, so that the reliability of the electric contact of the first conductive seat and the second conductive seat is ensured. Therefore, the motor of the vehicle can inhibit bearing electric corrosion, avoid main shaft abrasion, and has simple structural design and lower manufacturing and later maintenance cost.

Drawings

Fig. 1 is a schematic diagram of an electric machine according to an embodiment of the present utility model.

Fig. 2 is a schematic view of a bearing electric corrosion inhibiting structure according to an embodiment of the present utility model.

Fig. 3 is a schematic view of a bearing electric corrosion inhibiting structure according to another embodiment of the present utility model.

Reference numerals:

1. a housing; 11. an end cap;

2. a main shaft; 21. a cavity;

3. a conductive assembly; 31. a first conductive base; 311. a guide channel; 32. a second conductive base; 321. a lining plate; 33. an elastic conductive member; 331. a spring; 332. a conductive block; 3321. conductive steel balls; 3322. a conductive cylinder;

4. a bearing; 41. an inner ring; 42. an outer ring.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A bearing electric corrosion inhibiting structure, a motor, and a vehicle according to an embodiment of the present utility model are described below with reference to fig. 1 to 3.

As shown in fig. 1 to 3, the bearing electric corrosion inhibition structure according to the embodiment of the present utility model includes: the main shaft 2 is arranged in the shell 1 and can rotate relative to the shell 1, an inner ring 41 of the bearing 4 is sleeved on the main shaft 2, an outer ring 42 of the bearing 4 abuts against the inner wall of the shell 1, the conductive component 3 is arranged in the shell 1, the conductive component 3 comprises a first conductive seat 31, a second conductive seat 32 and an elastic conductive piece 33, the first conductive seat 31 is arranged on the shell 1, the second conductive seat 32 is arranged at one end of the main shaft 2, and two ends of the elastic conductive piece 33 are respectively electrically connected with the first conductive seat 31 and the second conductive seat 32.

According to the bearing electric corrosion inhibition structure of the embodiment of the utility model, a voltage conduction path on the main shaft 2 can sequentially pass through the second conductive seat 32, the elastic conductive piece 33, the first conductive seat 31 and the shell 1, and the bearing outer ring 42 is propped against the shell 1, so that a higher shaft voltage cannot be established between the bearing inner ring 41 and the bearing outer ring 42, an oil film cannot be broken down, and electric corrosion of the bearing 4 is effectively inhibited.

In addition, since the elastic conductive piece 33 is propped against the main shaft 2 through the second conductive seat 32, the risk of abrasion of the main shaft 2 caused by direct propping of the elastic conductive piece 33 against the main shaft 2 can be avoided, and the service life of the main shaft 2 is prolonged. And since the elastic conductive member 33 has elasticity, axial tolerance and fluctuation during assembly or operation of the spindle 2 can be compensated for to ensure reliability of electrical contact of the first conductive socket 31 and the second conductive socket 32. Therefore, the bearing electric corrosion inhibition structure provided by the embodiment of the utility model can inhibit bearing electric corrosion, avoid abrasion of the main shaft 2, and has the advantages of simple structural design and lower manufacturing and later maintenance cost.

In some embodiments, as shown in fig. 2 and 3, the elastic conductive member 33 includes a spring 331 and a conductive block 332, one end of the spring 331 is connected to the first conductive seat 31, the other end of the spring 331 is connected to the conductive block 332, the spring 331 presses the conductive block 332 toward the spindle 2, and the conductive block 332 abuts against the second conductive seat 32. It will be appreciated that the spring 331 is also made of an electrically conductive material. The current transmission path on the spindle 2 is: spindle 2→second conductive seat 32→conductive block 332→spring 331→first conductive seat 31→housing 1. The bearing electric corrosion inhibition structure of the embodiment of the utility model can facilitate the processing and manufacturing of the elastic conductive piece 33 by arranging the elastic conductive piece 33 into the structure, and has simple structural design and lower production cost.

Alternatively, as shown in fig. 3, the conductive block 332 is a conductive cylinder, and one end of the conductive cylinder along the axial direction thereof abuts against the second conductive seat 32, so that the processing and manufacturing of the conductive block 332 can be facilitated.

Optionally, the conductive block 332 has an arc-shaped contact portion that abuts the second conductive mount 32. It can be appreciated that the end of the conductive block 332 adjacent to the second conductive seat 32 is in point contact with the second conductive seat 32, so that the friction loss between the conductive block 332 and the second conductive seat 32 can be reduced by reducing the contact area between the conductive block 332 and the second conductive seat 32, and the service life of the bearing electric corrosion inhibition structure is improved.

For example, as shown in fig. 2, the conductive block 332 is a conductive steel ball, and the conductive steel ball abuts against the second conductive seat 32, so that the processing and manufacturing of the conductive block 332 can be facilitated, and the friction loss between the conductive block 332 and the second conductive seat 32 can be reduced.

Alternatively, as shown in fig. 2 and 3, the elastic conductive member 33 is located on the same axis as the spindle 2, specifically, the axis of the conductive block 332 is located on the same line as the axis of the spindle 2, so that when the spindle 2 rotates, the friction linear velocity of the conductive block 332 is smaller, further reducing the friction loss between the conductive block 332 and the second conductive seat 32, and prolonging the service life of the bearing electric corrosion inhibiting structure.

In some embodiments, as shown in fig. 1 and 2, the housing 1 has an end cap 11, an end of the main shaft 2 adjacent to the end cap 11 is opposite to the end cap 11, a first conductive seat 31 is provided on the end cap 11, a second conductive seat 32 is provided on an end of the main shaft 2 adjacent to the end cap 11, the first conductive seat 31 and the second conductive seat 32 are spaced apart along the axial direction of the main shaft 2, and an elastic conductive member 33 is provided between the first conductive seat 31 and the second conductive seat 32.

Alternatively, as shown in fig. 2 and 3, the end of the spindle 2 adjacent to the end cover 11 is provided with a cavity 21, the second conductive seat 32 is a lining board 321, and the lining board 321 is disposed in the cavity 21. Specifically, the axis of the cavity 21 is on the same line as the rotation axis of the main shaft 2, and the lining plate 321 is fitted into the cavity 21, so that the axial installation size of the bearing electric corrosion inhibiting structure can be reduced to make the structure more compact.

Alternatively, as shown in fig. 2 and 3, the cross section of the first conductive holder 31 orthogonal to the axial direction of the spindle 2 is smaller than the cross section of the cavity 21 orthogonal to the axial direction of the spindle 2, and the first conductive holder 31 is arranged coaxially with the cavity 21. It will be appreciated that the outer peripheral contour of the first conductive seat 31 is smaller than the outer peripheral contour of the cavity 21, so that when the housing 1 or the spindle 2 fluctuates in the axial direction of the spindle 2, no interference occurs between the second conductive seat 32 and the spindle 2, improving the reliability of the bearing electric corrosion inhibiting structure in operation.

Alternatively, as shown in fig. 2 and 3, a guide channel 311 is provided in the first conductive seat 31, the guide channel 311 extends along the axial direction of the spindle 2, and at least part of the elastic conductive member 33 is provided in the guide channel 311. It will be appreciated that the left end of the spring 331 is disposed in the guide channel 311 so that the dimension of the conductive member 3 in the axial direction of the spindle 2 can be conveniently reduced, and on the other hand, the movement of the spring 331 can be guided so that the contact of the elastic conductive member 33 with the second conductive seat 32 is more reliable.

In some embodiments, the first conductive mount 31 is removably connected to the end cap 11 and the second conductive mount 32 is removably connected to the spindle 2. For example, the first conductive socket 31 and the end cap 11 may be connected by a screw, and the backing plate 321 may be mounted into the cavity 21 of the spindle 2 by a jackscrew. Therefore, the bearing electric corrosion inhibition structure provided by the embodiment of the utility model can be used for conveniently replacing the conductive component 3, and the later maintenance cost is saved.

As shown in fig. 1, an electric machine according to another embodiment of the present utility model includes the bearing electric corrosion inhibiting structure of the present utility model. It will be appreciated that the housing 1 of the bearing galvanic corrosion barrier structure of the utility model is the housing of the motor and the spindle 2 of the bearing galvanic corrosion barrier structure of the utility model is the motor shaft of the motor.

According to the motor of the embodiment of the utility model, a voltage conduction path on the main shaft 2 of the motor can sequentially pass through the second conductive seat 32, the elastic conductive piece 33, the first conductive seat 31 and the shell 1, and the bearing outer ring 42 is propped against the shell 1, so that a higher shaft voltage cannot be established between the bearing inner ring 41 and the bearing outer ring 42, an oil film cannot be broken down, and the electric corrosion of the bearing 4 is effectively inhibited. In addition, since the elastic conductive piece 33 is propped against the main shaft 2 through the second conductive seat 32, the risk of abrasion of the main shaft 2 caused by direct propping of the elastic conductive piece 33 against the main shaft 2 can be avoided, and the service life of the main shaft 2 is prolonged. And since the elastic conductive member 33 has elasticity, axial tolerance and fluctuation during assembly or operation of the spindle 2 can be compensated for to ensure reliability of electrical contact of the first conductive socket 31 and the second conductive socket 32. Therefore, the motor of the embodiment of the utility model can inhibit bearing electric corrosion, avoid the abrasion of the main shaft 2, and has simple structural design and lower manufacturing and later maintenance cost.

A vehicle according to another embodiment of the present utility model includes: the utility model relates to a bearing electric corrosion inhibition structure or a motor.

According to the vehicle of the embodiment of the utility model, the voltage conduction path on the main shaft 2 of the motor can sequentially pass through the second conductive seat 32, the elastic conductive piece 33, the first conductive seat 31 and the shell 1, and the bearing outer ring 42 is propped against the shell 1, so that the bearing inner ring 41 and the bearing outer ring 42 cannot establish higher shaft voltage, an oil film cannot be broken down, and the electric corrosion of the bearing 4 is effectively inhibited. In addition, since the elastic conductive piece 33 is propped against the main shaft 2 through the second conductive seat 32, the risk of abrasion of the main shaft 2 caused by direct propping of the elastic conductive piece 33 against the main shaft 2 can be avoided, and the service life of the main shaft 2 is prolonged. And since the elastic conductive member 33 has elasticity, axial tolerance and fluctuation during assembly or operation of the spindle 2 can be compensated for to ensure reliability of electrical contact of the first conductive socket 31 and the second conductive socket 32. Therefore, the motor of the vehicle can inhibit bearing electric corrosion, avoid abrasion of the main shaft 2, and has simple structural design and lower manufacturing and later maintenance cost.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (10)

1. A bearing electric corrosion inhibiting structure, comprising:

a housing;

the main shaft is at least partially arranged in the shell and can rotate relative to the shell;

the inner ring of the bearing is sleeved on the main shaft, and the outer ring of the bearing abuts against the inner wall of the shell;

the conductive assembly is positioned in the shell and comprises a first conductive seat, a second conductive seat and an elastic conductive piece, wherein the first conductive seat is arranged on the shell, the second conductive seat is arranged at one end of the main shaft, and two ends of the elastic conductive piece are respectively electrically connected with the first conductive seat and the second conductive seat.

2. The bearing electric corrosion inhibiting structure according to claim 1, wherein the elastic conductive member includes a spring and a conductive block, one end of the spring is connected to the first conductive seat, the other end of the spring is connected to the conductive block, the spring presses the conductive block toward the direction of the main shaft, and the conductive block abuts against the second conductive seat.

3. The bearing galvanic corrosion barrier structure of claim 2, wherein the conductive block has an arcuate contact portion that abuts the second conductive socket;

or the conductive block is a conductive steel ball, and the conductive steel ball is propped against the second conductive seat;

or, the conductive block is a conductive cylinder, and one end of the conductive cylinder along the axial direction of the conductive cylinder abuts against the second conductive seat.

4. The bearing electric corrosion inhibiting structure of claim 1, wherein the elastic conductive member is located on the same axis as the main shaft.

5. The bearing galvanic corrosion barrier according to claim 1, wherein the housing has an end cap, the end of the spindle adjacent the end cap being opposite the end cap, the first conductive mount being disposed on the end cap, the second conductive mount being disposed at the end of the spindle adjacent the end cap, the first conductive mount and the second conductive mount being spaced apart along the axial direction of the spindle, the resilient conductive member being disposed between the first conductive mount and the second conductive mount.

6. The structure of claim 5, wherein the end of the main shaft adjacent to the end cap is provided with a cavity, the second conductive seat is a lining plate, and the lining plate is arranged in the cavity.

7. The bearing electric corrosion inhibiting structure of claim 6, wherein a cross-section of the first conductive mount orthogonal to the spindle axis is smaller than a cross-section of the cavity orthogonal to the spindle axis, and the first conductive mount is arranged coaxially with the cavity;

and/or, a guide channel is arranged in the first conductive seat, the guide channel extends along the axial direction of the main shaft, and at least part of the elastic conductive piece is arranged in the guide channel.

8. The bearing galvanic corrosion barrier structure of claim 5, wherein the first conductive mount is removably connected to the end cap and/or the second conductive mount is removably connected to the spindle.

9. An electric machine comprising the bearing electric corrosion inhibiting structure of any one of claims 1 to 8.

10. A vehicle comprising the bearing electric corrosion inhibiting structure of any one of claims 1 to 8 or the electric machine of claim 9.

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