Grounding device of large-shaft-diameter motor

Abstract

The invention relates to a grounding device of a large-shaft-diameter motor, and relates to the technical field of permanent magnet direct drive traction motors. The device comprises a bearing outer ring gland and a bearing inner ring baffle ring, wherein the bearing outer ring gland and the bearing inner ring baffle ring are mounted on a large-shaft-diameter motor; the fixed bracket is mounted between the bearing outer ring gland and the bearing inner ring baffle ring, and a carbon fiber bundle mounting and fixing hole is formed in the fixed bracket; the carbon fiber bundles are mounted on the carbon fiber bundle mounting and fixing holes; according to the invention, an integral spiral carbon fiber bundle structure is adopted, so that the technical problem of conductive stability is solved; the contact resistance between the spiral carbon fiber bundle brush head and the rotating piece is small; the overall structural rigidity is good, the rebound capacity is high during contact stress, and the contact state is stable and reliable; the carbon fiber brush head is conducted in a radial contact mode and can freely deform in the radial direction, and the contact force can be automatically adjusted in the operation process. Compared with a traditional independent brush head, the integral carbon fiber brush head is simple and convenient in manufacturing process.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet direct drive traction motors, and in particular to a grounding device for a motor with a large shaft diameter. Background Art

[0002] Permanent magnet direct drive motor is a new type of high-efficiency and energy-saving motor developed by applying modern power electronics technology, microelectronics manufacturing technology and computer control technology to transform the structure and principle of traditional DC motors;

[0003] Generally speaking, the shaft diameter of low-power motors is small, usually between 5mm and 30mm, while the shaft diameter of high-power motors, especially those used in industrial applications or heavy equipment, may reach 50mm to 150mm or larger. In order to reduce the impact of electromagnetic radiation and electromagnetic interference (EMI) generated by electromagnetic induction effect on other electronic equipment after the motor is powered on, the motor usually needs to be grounded. At present, there are two major categories of publicly released motor grounding devices: one is conductive bearings, which are mostly used on new energy motors; the other is conductive brushes, which are usually divided into traditional carbon brushes and new carbon fiber brushes;

[0004] The traditional carbon brush has a complex structure, many parts, and requires a large installation space. The brush head is prone to wear and tear, and requires regular maintenance, replacement, and cleaning of the generated carbon powder. At the same time, it is not suitable for high-speed motors. The new carbon fiber brush has point contact and a smaller contact area than traditional carbon brushes. In order to increase the contact points, the fiber brush head needs to be arranged all around. Secondly, the brush head structure leads to poor recovery stiffness. The fiber brush has a cantilever structure and the brush head is dispersed. After the contact shaft is subjected to force, the brush head structure is not stiff enough and is easy to fall over, and cannot rebound in time to restore the contact force. After being subjected to force, the brush head is easily dispersed, resulting in unstable contact state and poor conductivity. At the same time, the contact force between the brush head and the shaft cannot be adjusted, and a good conductive contact state cannot be ensured. Summary of the invention

[0005] The present invention provides a grounding device for a large-diameter motor, which is used to solve the problems in the above-mentioned technology that the traditional carbon brush has a complex structure, many parts, requires a large installation space, and has a worn brush head, and requires regular maintenance, replacement, and cleaning of the generated carbon powder;

[0006] At the same time, the problem that the new type of carbon fiber brush proposed in the above technology is point contact and has a smaller contact area than the traditional carbon brush. In order to increase the contact points, the fiber brush head needs to be arranged all around. Secondly, the brush head structure leads to poor recovery stiffness. The fiber brush has a cantilever structure and the brush head is dispersed. After the contact shaft is subjected to force, the brush head structure is not stiff enough and is easy to fall over, and cannot rebound in time to restore the contact force. After being subjected to force, the brush head is easy to disperse, resulting in unstable contact state and poor conductivity. At the same time, the contact force between the brush head and the shaft cannot be adjusted, and a good conductive contact state cannot be ensured.

[0007] The present invention provides a grounding device for a large-diameter motor, comprising:

[0008] A bearing outer ring gland and a bearing inner ring retaining ring, wherein the bearing outer ring gland and the bearing inner ring retaining ring are installed on the large shaft diameter motor;

[0009] A fixing bracket is installed between the bearing outer ring gland and the bearing inner ring retaining ring, and the fixing bracket is provided with a carbon fiber bundle installation fixing hole;

[0010] A carbon fiber bundle, and a carbon fiber bundle mounting fixing hole mounted on the fixing bracket;

[0011] The fixing bracket is installed between the bearing outer ring pressure cover and the bearing inner ring retaining ring through interference fit without additional fixing.

[0012] Preferably, the carbon fiber bundle is installed between the bearing outer ring gland and the bearing inner ring retaining ring through the fixing bracket;

[0013] The continuous spiral carbon fiber bundle forms a brush head with good elasticity and stable contact force. Different from the dispersed independent brush head, its manufacturing process is simple and easy to install;

[0014] The spiral grounding carbon fiber bundle has a large deformation capacity in the axial and radial directions, and can automatically adjust the contact state during operation, making it easy to obtain a stable contact conductive effect.

[0015] Preferably, a plurality of carbon fiber bundle mounting and fixing holes are evenly distributed on the left and right sides of the fixing bracket, and the total number of the carbon fiber bundle mounting and fixing holes is an even number.

[0016] Preferably, the wall thickness of the fixing bracket is 0.5 mm-0.9 mm;

[0017] Preferably, no carbon fiber bundle mounting and fixing hole is provided at the lower center position of the fixing bracket.

[0018] Preferably, the carbon fiber bundle comprises two groups of mounting segments and one group of connecting segments, the two groups of mounting segments are connected by one group of connecting segments, the mounting segments are spiral, and the two groups of mounting segments are respectively connected to the carbon fiber bundle mounting fixing holes, and the connecting segments are arranged at the center position below the fixing bracket;

[0019] The carbon fiber bundles are spiral, and two groups are provided, and the two groups of carbon fiber bundles are respectively connected to the carbon fiber bundle installation and fixing holes;

[0020] The carbon fiber bundle adopts a continuous spiral carbon fiber brush head, which is soft enough to contact with the inner ring retaining ring of the bearing and has sufficient rigidity to ensure stable contact force during movement.

[0021] Preferably, the rotation directions of the carbon fiber bundles on both sides of the fixing bracket are opposite;

[0022] The rotation directions of the carbon fiber bundles on both sides are opposite, ensuring that the force on the carbon fiber bundles is stable and uniform when the motor rotates forward and reverse.

[0023] Preferably, the carbon fiber bundle is made of a flexible material, and is used to match the carbon fiber bundle installation and fixing holes with different spacings;

[0024] By setting the carbon fiber bundle mounting fixing holes at different intervals, carbon fiber brush heads with different densities can be formed, so that the initial contact stiffness can be set and adjusted.

[0025] The contact size requirements for different shaft diameters can be met by adjusting the spiral diameter.

[0026] Preferably, a groove is provided inside the motor relative to the fixing bracket, and the groove cooperates with the fixing bracket to compress the carbon fiber bundle.

[0027] Preferably, the fixing bracket is configured to be cylindrical.

[0028] Compared with the prior art, the advantages of the present invention are:

[0029] 1. The present invention adopts an integral spiral carbon fiber bundle structure. The contact resistance between the spiral carbon fiber bundle brush head and the rotating part is small, the overall structural rigidity is good, the rebound ability is strong when the contact force is applied, the contact state is stable and reliable, and the technical problem of stable conductivity can be solved.

[0030] 2. The carbon fiber brush head adopts radial contact conduction, can deform freely in the radial direction, and can automatically adjust the contact force during operation.

[0031] 3. Compared with the traditional independent brush head, the manufacturing process of the integral carbon fiber brush head is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0033] Figure 1 is a schematic diagram of the connection between the fixing bracket and the carbon fiber bundle structure in an embodiment of the present invention;

[0034] Figure 2 is a cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0035] Figure 3 is a schematic diagram of a fixed bracket structure in an embodiment of the present invention;

[0036] Figure 4 is a side schematic diagram of a fixed support structure in an embodiment of the present invention;

[0037] Figure 5 is a schematic diagram of the structure of a carbon fiber bundle in an embodiment of the present invention;

[0038] Figure 6 is a schematic diagram of a fixed bracket portion in an embodiment of the present invention;

[0039] Figure 7 is a partial cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0040] Reference numerals:

[0041] 1. Fixed bracket; 2. Carbon fiber bundle; 3. Bearing outer ring pressure cover; 4. Bearing inner ring retaining ring; 5. Carbon fiber bundle installation fixing hole. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0043] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0044] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" 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.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are only connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0047] The present invention provides a technical solution: a grounding device for a large shaft diameter motor, comprising:

[0048] A bearing outer ring pressure cover 3 and a bearing inner ring retaining ring 4, wherein the bearing outer ring pressure cover 3 and the bearing inner ring retaining ring 4 are installed on the large shaft diameter motor;

[0049] A fixing bracket 1 is installed between the bearing outer ring gland 3 and the bearing inner ring retaining ring 4, and a carbon fiber bundle installation fixing hole 5 is opened on the fixing bracket 1;

[0050] The carbon fiber bundle 2 is mounted on the fixing bracket 1 through the carbon fiber bundle mounting fixing hole 5 .

[0051] The carbon fiber bundle 2 is installed on the fixing bracket 1 through the carbon fiber bundle installation and fixing hole 5;

[0052] The carbon fiber bundle 2 is installed between the bearing outer ring pressure cover 3 and the bearing inner ring retaining ring 4 through the fixing bracket 1.

[0053] A plurality of carbon fiber bundle mounting holes 5 are evenly distributed on the left and right sides of the fixing bracket 1 , and the total number of the carbon fiber bundle mounting holes 5 is an even number.

[0054] The included angle between two adjacent groups of the carbon fiber bundle mounting and fixing holes 5 is α;

[0055]

[0056] Where θ is the total central angle of the arc ring (in radians) and n is the number of holes.

[0057] The carbon fiber bundle mounting fixing hole 5 is not provided at the center position below the fixing bracket 1 .

[0058] The carbon fiber bundle 2 includes two groups of mounting sections and one group of connecting sections. The two groups of mounting sections are connected by one group of connecting sections. The mounting sections are spiral and the two groups of mounting sections are respectively connected to the carbon fiber bundle mounting fixing holes 5. The connecting sections are arranged at the center position below the fixing bracket 1.

[0059] The carbon fiber bundles 2 are spiral, and two groups are provided. The two groups of carbon fiber bundles 2 are respectively connected to the carbon fiber bundle installation and fixing holes 5.

[0060] The rotation directions of the carbon fiber bundles 2 on both sides of the fixing bracket 1 are opposite.

[0061] The carbon fiber bundle 2 is made of flexible material and is used to match the carbon fiber bundle mounting and fixing holes 5 with different spacings.

[0062] A groove is provided inside the motor relative to the fixing bracket 1 , and the groove cooperates with the fixing bracket 1 to compress the carbon fiber bundle 2 .

[0063] Embodiment 1

[0064] See also Figure 1 As shown, Figure 1 is a schematic diagram of the connection between the fixing bracket and the carbon fiber bundle structure in an embodiment of the present invention;

[0065] See also Figure 2 As shown, Figure 2 is a cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0066] See also Figure 3 As shown, Figure 3 is a schematic diagram of a fixed bracket structure in an embodiment of the present invention;

[0067] See also Figure 4 As shown, Figure 4 is a side schematic diagram of a fixed support structure in an embodiment of the present invention;

[0068] See also Figure 5 As shown, Figure 5 is a schematic diagram of the structure of a carbon fiber bundle in an embodiment of the present invention;

[0069] See also Figure 6 As shown, Figure 6 is a schematic diagram of a fixed bracket portion in an embodiment of the present invention;

[0070] See also Figure 7 As shown, Figure 7 is a partial cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0071] like Figure 1-Figure 7 As shown, the present invention provides a grounding device for a large shaft diameter motor, comprising:

[0072] A bearing outer ring pressure cover 3 and a bearing inner ring retaining ring 4, wherein the bearing outer ring pressure cover 3 and the bearing inner ring retaining ring 4 are installed on the large shaft diameter motor;

[0073] A fixing bracket 1 is installed between the bearing outer ring gland 3 and the bearing inner ring retaining ring 4, and a carbon fiber bundle installation fixing hole 5 is opened on the fixing bracket 1;

[0074] A carbon fiber bundle 2, and a carbon fiber bundle mounting fixing hole 5 mounted on the fixing bracket 1;

[0075] The fixing bracket 1 is installed between the bearing outer ring gland 3 and the bearing inner ring retaining ring 4 by interference fit without additional fixing;

[0076] The carbon fiber bundle 2 is mounted on the fixing bracket 1 through the carbon fiber bundle mounting and fixing hole 5;

[0077] The carbon fiber bundle 2 is installed between the bearing outer ring pressure cover 3 and the bearing inner ring retaining ring 4 through the fixing bracket 1.

[0078] Embodiment 2

[0079] See also Figure 1 As shown, Figure 1 is a schematic diagram of the connection between the fixing bracket and the carbon fiber bundle structure in an embodiment of the present invention;

[0080] See also Figure 2 As shown, Figure 2 is a cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0081] See also Figure 3 As shown, Figure 3 is a schematic diagram of a fixed bracket structure in an embodiment of the present invention;

[0082] See also Figure 4 As shown, Figure 4 is a side schematic diagram of a fixed support structure in an embodiment of the present invention;

[0083] See also Figure 5 As shown, Figure 5 is a schematic diagram of the structure of a carbon fiber bundle in an embodiment of the present invention;

[0084] See also Figure 6 As shown, Figure 6 is a schematic diagram of a fixed bracket portion in an embodiment of the present invention;

[0085] See also Figure 7 As shown, Figure 7 is a partial cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0086] like Figure 1-Figure 7 As shown, a grounding device for a large shaft diameter motor comprises:

[0087] A bearing outer ring pressure cover 3 and a bearing inner ring retaining ring 4, wherein the bearing outer ring pressure cover 3 and the bearing inner ring retaining ring 4 are installed on the large shaft diameter motor;

[0088] A fixing bracket 1 is installed between the bearing outer ring gland 3 and the bearing inner ring retaining ring 4, and a carbon fiber bundle installation fixing hole 5 is opened on the fixing bracket 1;

[0089] A carbon fiber bundle 2, and a carbon fiber bundle mounting fixing hole 5 mounted on the fixing bracket 1;

[0090] The continuous spiral carbon fiber bundle 2 forms a brush head with good elasticity and stable contact force. Different from the dispersed independent brush head, its manufacturing process is simple and easy to install;

[0091] The spiral grounding carbon fiber bundle 2 has a large deformation capacity in the axial and radial directions, and can automatically adjust the contact state during operation, making it easy to obtain a stable contact conductive effect;

[0092] A plurality of carbon fiber bundle mounting holes 5 are evenly distributed on the left and right sides of the fixing bracket 1 , and the total number of the carbon fiber bundle mounting holes 5 is an even number.

[0093] Embodiment 3

[0094] See also Figure 1 As shown, Figure 1 is a schematic diagram of the connection between the fixing bracket and the carbon fiber bundle structure in an embodiment of the present invention;

[0095] See also Figure 2 As shown, Figure 2 is a cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0096] See also Figure 3 As shown, Figure 3 is a schematic diagram of a fixed bracket structure in an embodiment of the present invention;

[0097] See also Figure 4 As shown, Figure 4 is a side schematic diagram of a fixed support structure in an embodiment of the present invention;

[0098] See also Figure 5 As shown, Figure 5 is a schematic diagram of the structure of a carbon fiber bundle in an embodiment of the present invention;

[0099] See also Figure 6 As shown, Figure 6 is a schematic diagram of a fixed bracket portion in an embodiment of the present invention;

[0100] See also Figure 7As shown, Figure 7 is a partial cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0101] like Figure 1-Figure 7 As shown, a grounding device for a large shaft diameter motor comprises:

[0102] A bearing outer ring pressure cover 3 and a bearing inner ring retaining ring 4, wherein the bearing outer ring pressure cover 3 and the bearing inner ring retaining ring 4 are installed on the large shaft diameter motor;

[0103] A fixing bracket 1 is installed between the bearing outer ring gland 3 and the bearing inner ring retaining ring 4, and a carbon fiber bundle installation fixing hole 5 is opened on the fixing bracket 1;

[0104] A carbon fiber bundle 2, and a carbon fiber bundle mounting fixing hole 5 mounted on the fixing bracket 1;

[0105] The included angle between two adjacent groups of the carbon fiber bundle mounting and fixing holes 5 is α;

[0106] By setting different α angles to form carbon fiber brush heads with different densities, the initial contact stiffness can be set and adjusted.

[0107] Embodiment 4

[0108] See also Figure 1 As shown, Figure 1 is a schematic diagram of the connection between the fixing bracket and the carbon fiber bundle structure in an embodiment of the present invention;

[0109] See also Figure 2 As shown, Figure 2 is a cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0110] See also Figure 3 As shown, Figure 3 is a schematic diagram of a fixed bracket structure in an embodiment of the present invention;

[0111] See also Figure 4 As shown, Figure 4 is a side schematic diagram of a fixed support structure in an embodiment of the present invention;

[0112] See also Figure 5 As shown, Figure 5 is a schematic diagram of the structure of a carbon fiber bundle in an embodiment of the present invention;

[0113] See also Figure 6 As shown, Figure 6 is a schematic diagram of a fixed bracket portion in an embodiment of the present invention;

[0114] See also Figure 7 As shown, Figure 7is a partial cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0115] like Figure 1-Figure 7 As shown, a grounding device for a large shaft diameter motor comprises:

[0116] A bearing outer ring pressure cover 3 and a bearing inner ring retaining ring 4, wherein the bearing outer ring pressure cover 3 and the bearing inner ring retaining ring 4 are installed on the large shaft diameter motor;

[0117] A fixing bracket 1 is installed between the bearing outer ring gland 3 and the bearing inner ring retaining ring 4, and a carbon fiber bundle installation fixing hole 5 is opened on the fixing bracket 1;

[0118] A carbon fiber bundle 2, and a carbon fiber bundle mounting fixing hole 5 mounted on the fixing bracket 1;

[0119] The carbon fiber bundle mounting fixing hole 5 is not provided below the fixing bracket 1 to ensure that the fixing bracket 1 has sufficient strength and rigidity.

[0120] Embodiment 5

[0121] See also Figure 1 As shown, Figure 1 is a schematic diagram of the connection between the fixing bracket and the carbon fiber bundle structure in an embodiment of the present invention;

[0122] See also Figure 2 As shown, Figure 2 is a cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0123] See also Figure 3 As shown, Figure 3 is a schematic diagram of a fixed bracket structure in an embodiment of the present invention;

[0124] See also Figure 4 As shown, Figure 4 is a side schematic diagram of a fixed support structure in an embodiment of the present invention;

[0125] See also Figure 5 As shown, Figure 5 is a schematic diagram of the structure of a carbon fiber bundle in an embodiment of the present invention;

[0126] See also Figure 6 As shown, Figure 6 is a schematic diagram of a fixed bracket portion in an embodiment of the present invention;

[0127] See also Figure 7 As shown, Figure 7 is a partial cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0128] like Figure 1-Figure 7As shown, a grounding device for a large shaft diameter motor comprises:

[0129] A bearing outer ring pressure cover 3 and a bearing inner ring retaining ring 4, wherein the bearing outer ring pressure cover 3 and the bearing inner ring retaining ring 4 are installed on the large shaft diameter motor;

[0130] A fixing bracket 1 is installed between the bearing outer ring gland 3 and the bearing inner ring retaining ring 4, and a carbon fiber bundle installation fixing hole 5 is opened on the fixing bracket 1;

[0131] A carbon fiber bundle 2, and a carbon fiber bundle mounting fixing hole 5 mounted on the fixing bracket 1;

[0132] The carbon fiber bundle 2 includes two groups of mounting sections and one group of connecting sections. The two groups of mounting sections are connected by one group of connecting sections. The mounting sections are spiral and the two groups of mounting sections are respectively connected to the carbon fiber bundle mounting fixing holes 5. The connecting sections are arranged at the center position below the fixing bracket 1.

[0133] The carbon fiber bundles 2 are spiral, and two groups are provided, and the two groups of carbon fiber bundles 2 are respectively connected to the carbon fiber bundle mounting and fixing holes 5;

[0134] The carbon fiber bundle 2 adopts a continuous spiral carbon fiber brush head, which is soft enough to contact with the bearing inner ring retaining ring 4, and has sufficient rigidity to ensure stable contact force during movement;

[0135] According to the diameter of the rotating part, two groups of symmetrically distributed carbon fiber bundles 2 are selected, or two groups of carbon fiber bundles 2 with mounting sections are connected by a group of connecting sections.

[0136] The rotation directions of the carbon fiber bundles 2 on both sides of the fixing bracket 1 are opposite;

[0137] The rotation directions of the carbon fiber bundles 2 on both sides are opposite, which ensures that the force on the carbon fiber bundles 2 is stable and uniform when the motor rotates forward and reverse.

[0138] Embodiment 6

[0139] See also Figure 1 As shown, Figure 1 is a schematic diagram of the connection between the fixing bracket and the carbon fiber bundle structure in an embodiment of the present invention;

[0140] See also Figure 2 As shown, Figure 2 is a cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0141] See also Figure 3 As shown, Figure 3 is a schematic diagram of a fixed bracket structure in an embodiment of the present invention;

[0142] See also Figure 4 As shown, Figure 4 is a side schematic diagram of a fixed support structure in an embodiment of the present invention;

[0143] See also Figure 5 As shown, Figure 5 is a schematic diagram of the structure of a carbon fiber bundle in an embodiment of the present invention;

[0144] See also Figure 6 As shown, Figure 6 is a schematic diagram of a fixed bracket portion in an embodiment of the present invention;

[0145] See also Figure 7 As shown, Figure 7 is a partial cross-sectional schematic diagram of a grounding device for a large-diameter motor in an embodiment of the present invention;

[0146] like Figure 1-Figure 7 As shown, a grounding device for a large shaft diameter motor comprises:

[0147] A bearing outer ring pressure cover 3 and a bearing inner ring retaining ring 4, wherein the bearing outer ring pressure cover 3 and the bearing inner ring retaining ring 4 are installed on the large shaft diameter motor;

[0148] A fixing bracket 1 is installed between the bearing outer ring gland 3 and the bearing inner ring retaining ring 4, and a carbon fiber bundle installation fixing hole 5 is opened on the fixing bracket 1;

[0149] A carbon fiber bundle 2, and a carbon fiber bundle mounting fixing hole 5 mounted on the fixing bracket 1;

[0150] The carbon fiber bundle 2 includes two groups of mounting sections and one group of connecting sections. The two groups of mounting sections are connected by one group of connecting sections. The mounting sections are spiral and the two groups of mounting sections are respectively connected to the carbon fiber bundle mounting fixing holes 5. The connecting sections are arranged at the center position below the fixing bracket 1.

[0151] The carbon fiber bundles 2 are spiral, and two groups are provided, and the two groups of carbon fiber bundles 2 are respectively connected to the carbon fiber bundle mounting and fixing holes 5;

[0152] The carbon fiber bundle 2 is made of flexible material and is used to match the carbon fiber bundle mounting and fixing holes 5 with different spacings;

[0153] The contact size requirements of different shaft diameters can be met by adjusting the spiral diameter;

[0154] A groove is provided inside the motor relative to the fixing bracket 1 , and the groove cooperates with the fixing bracket 1 to compress the carbon fiber bundle 2 .

[0155] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A grounding device for a large shaft diameter motor, characterized in that: include: A bearing outer ring gland and a bearing inner ring retaining ring, wherein the bearing outer ring gland and the bearing inner ring retaining ring are installed on the large shaft diameter motor; A fixing bracket is installed between the bearing outer ring gland and the bearing inner ring retaining ring, and the fixing bracket is provided with a carbon fiber bundle installation fixing hole; A carbon fiber bundle is installed in a carbon fiber bundle installation fixing hole on the fixing bracket.

2. The grounding device for a large shaft diameter motor according to claim 1, characterized in that: The carbon fiber bundle is installed between the bearing outer ring pressure cover and the bearing inner ring retaining ring through the fixing bracket.

3. The grounding device for a large shaft diameter motor according to claim 2, characterized in that: A plurality of carbon fiber bundle mounting and fixing holes are evenly distributed on the left and right sides of the fixing bracket, and the total number of the carbon fiber bundle mounting and fixing holes is an even number.

4. The grounding device for a large shaft diameter motor according to claim 3, characterized in that: The wall thickness of the fixing bracket is between 0.5 mm and 0.9 mm.

5. The grounding device for a large-diameter motor according to claim 4, characterized in that: No carbon fiber bundle mounting fixing hole is provided at the lower center position of the fixing bracket.

6. The grounding device for a large-diameter motor according to claim 5, characterized in that: The carbon fiber bundle includes two groups of mounting sections and one group of connecting sections. The two groups of mounting sections are connected by one group of connecting sections. The mounting sections are spiral and the two groups of mounting sections are respectively connected to the carbon fiber bundle mounting fixing holes. The connecting sections are arranged at the center position below the fixing bracket.

7. The grounding device for a large-diameter motor according to claim 5, characterized in that: The carbon fiber bundles are spiral, and two groups are provided. The two groups of carbon fiber bundles are respectively connected to the carbon fiber bundle installation and fixing holes.

8. The grounding device for a large-diameter motor according to claim 7, characterized in that: The rotation directions of the carbon fiber bundles on both sides of the fixing bracket are opposite.

9. The grounding device for a large shaft diameter motor according to claim 8, characterized in that: The carbon fiber bundle is made of flexible material and is used to match the carbon fiber bundle installation and fixing holes with different spacings.

10. The grounding device for a large-diameter motor according to claim 9, characterized in that: A groove is provided inside the motor relative to the fixing bracket, and the groove cooperates with the fixing bracket to compress the carbon fiber bundle.

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