CN215498648U - Bearing clamp plate assembly - Google Patents

Abstract

The utility model discloses a bearing pressure plate assembly which comprises a pressure plate body, wherein the pressure plate body is in a circular ring shape, the upper end surface of the pressure plate body is an assembling surface, the lower end surface of the pressure plate body is a motor shaft end cover attaching surface, at least two groups of conductive brush assemblies are uniformly distributed on the assembling surface, each conductive brush assembly comprises a brush support, a conductive brush is arranged on each brush support, each conductive brush extends to an inner ring of the pressure plate body and points to the circle center of the pressure plate body, and therefore the effects of being capable of being suitable for high-frequency shaft current and low-frequency shaft current at the same time and being high in durability are achieved. There are at least two sets of electrically conductive brush subassemblies through the equipartition, make this technical scheme both be applicable to low frequency axle electric current and also be applicable to high frequency axle electric current, electrically conductive brush quantity and conductive fiber quantity can also calculate according to actual conditions and draw, the individual character design, this design simple structure, convenient operation does not need loaded down with trivial details structure, can protect the bearing to avoid electrical corrosion, reduce cost, extension equipment life.

Description

Bearing clamp plate assembly

Technical Field

The utility model belongs to the technical field of electric brush fixing sheets, and particularly relates to a bearing plate assembly.

Background

Galvanic corrosion is a common failure mode for motor bearings. When the motor operates, the potential difference generated between two ends of the rotating shaft or between the shafts is called shaft voltage. If the two ends of the shaft form a loop through a motor base and the like, shaft current is generated under the action of shaft voltage. The shaft current is generated by a closed loop formed by a motor, a bearing, a stator base or an auxiliary device, and the shaft current is restrained because the shaft voltage is lower under normal conditions and a lubricating oil film in the bearing can play an insulating role; however, when the shaft voltage is high or the oil film is not stably formed at the moment of starting the motor, the shaft voltage enables the lubricating oil film to be discharged and broken down to form a passage to generate shaft current, and the generation of the shaft current brings great potential safety hazard to the motor. Normally used bearings have an insulating lubricant between them, which is easily broken down by the shaft voltage without forming a stable oil film, thus allowing the shaft current to flow through the bearings to form a loop. When the shaft current passes through the roller of the bearing, the contact area of the bearing roller and the inner ring is small, under the condition, the high temperature generated by the partial discharge energy release of the shaft current can melt a plurality of micro areas on the inner ring, the outer ring or the ball of the bearing and form a groove, so that noise and vibration are generated, the failure of the bearing can be caused if the treatment cannot be found in time, and the great influence is brought to the production. It is generally very difficult to completely eliminate the potential difference inside the bearing, but by stopping or reducing the current through the bearing, galvanic corrosion of the bearing can be prevented.

At present, measures against electrical corrosion of bearings are mainly divided into two types, one is insulation, i.e. using an insulated bearing such as a bearing with an insulating layer, a ceramic bearing or using an insulating bush in an end-capped bearing chamber. However, the plated insulating bearing cannot completely block the ac circuit, and the ceramic bearing is very expensive. The insulating bush has a similar principle to the plating, and the cost control is also a difficult problem because the insulating bush has enough thickness and ensures effective insulation of the connecting piece. The second is current conduction, i.e. the shaft current is conducted to the ground by bypassing the bearing. In the market, a plurality of motors adopt a carbon brush for flow guiding to protect a bearing, for example, a conducting ring, a carbon brush bolt and the like are adopted, the conducting ring is expensive in manufacturing cost, certain requirements are required on the installation position and the installation space, the carbon brush bolt cannot be suitable for high-frequency shaft current, and the flow guiding device is poor in toughness and wear resistance. To this end, a bearing plate assembly was designed.

Disclosure of Invention

The utility model aims to provide a bearing plate assembly, which can be used for simultaneously applying high-frequency shaft current and low-frequency shaft current and has strong durability.

In order to achieve the purpose, the specific technical scheme of the bearing plate assembly is as follows:

the utility model provides a bearing clamp plate subassembly, includes the clamp plate body, the clamp plate body is the ring form, and clamp plate body up end is the fitting surface, and the terminal surface is motor shaft end cover binding face down, and the fitting surface equipartition has at least two sets of electrically conductive brush subassemblies, and electrically conductive brush subassembly includes the brush holder, is equipped with electrically conductive brush on the brush holder, and electrically conductive brush extends to the centre of a circle of the inner ring of clamp plate body and directional clamp plate body to reach not only can be suitable for high frequency axle electric current and low frequency axle electric current simultaneously, the strong effect of durability moreover.

Furthermore, the conductive brush is a stainless steel fiber conductive brush, the conductivity of the stainless steel fiber is closer to that of pure metal, the corrosion resistance of the stainless steel fiber is better, and the stainless steel fiber is more wear-resistant and has better toughness compared with carbon fiber.

Furthermore, the conductive brush is an organic conductive fiber conductive brush, and the excellent performance of the surface of a contact object cannot be damaged due to breakage and falling.

Furthermore, the assembly surface is evenly provided with at least four assembly through holes, so that the whole stress of the pressing plate body is more uniform, and the stability is ensured.

Furthermore, the assembly through hole is provided with a counter bore on the assembly surface, so that the flatness and the attractiveness of the assembly surface can be ensured during fixed connection.

Furthermore, the pressing plate body is made of rigid plates, so that the pressing plate body can provide better pressure.

Furthermore, the rigid plate is a metal plate, can be manufactured by adopting processes such as stamping and the like, is suitable for the current industrial manufacturing habit, and has low manufacturing cost.

Furthermore, the rigid plate is a plastic electroplating plate, can be manufactured by adopting processes such as injection molding and the like, has low industrial cost and is beneficial to the light weight of the motor.

Furthermore, the binding surface of the end cover of the motor shaft is provided with an electric brush support assembly through hole for fixedly mounting the electric brush support.

Furthermore, the assembly hole of the electric brush support is provided with a position-avoiding counter bore, so that the flatness of the binding surface of the end cover of the motor shaft can be ensured and the working performance of the pressing plate can be ensured when the processes such as bolts, riveting, welding and the like are met.

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

1. there are at least two sets of electrically conductive brush subassemblies through the equipartition, make this technical scheme both be applicable to low frequency axle electric current and also be applicable to high frequency axle electric current, electrically conductive brush quantity and conductive fiber quantity can also calculate according to actual conditions and draw, the individual character design, this design simple structure, convenient operation does not need loaded down with trivial details structure, can protect the bearing to avoid electrical corrosion, reduce cost, extension equipment life.

2. The annular pressing plate body can provide more uniform acting force when limiting the axial movement of the bearing, and the annular inner ring is used for a motor shaft to pass through, so that the problem that the pressure of the special-shaped pressing plate in a horseshoe shape and the like is not uniform enough is solved.

3. The conductive brush is made of stainless steel fibers, the conductivity of the stainless steel fibers is closer to that of pure metal, the corrosion resistance of the conductive brush is better, and compared with carbon fibers, the conductive brush is more wear-resistant, better in toughness, easy to manufacture and low in failure rate.

4. The conductive brush is an organic conductive fiber conductive brush, does not damage the excellent performance of the surface of a contact object due to breakage and falling, and is safe and reliable.

5. The assembly through hole is provided with a counter bore on the assembly surface, and the assembly hole of the electric brush support is provided with a position-avoiding counter bore, so that the two end surfaces of the pressing plate body obtain better flatness and integrity.

6. The pressing plate body is made of rigid plates, so that the pressing plate body can provide better pressure. The rigid plate is a plastic electroplating plate, can be manufactured by processes such as injection molding and the like, has low industrial cost, and is beneficial to light weight of the motor.

Drawings

FIG. 1 is a schematic view of an assembly plane of the structure of the present invention;

FIG. 2 is a schematic view of a bonding surface of an end cap of a solid motor shaft in the structure of the present invention;

FIG. 3 is a schematic diagram of a station of the present invention.

The reference numbers in the figures illustrate: 1. the motor comprises a pressure plate body, 2 parts of an assembly surface, 21 parts of an assembly through hole, 3 parts of a motor shaft end cover binding surface, 31 parts of a avoiding counter bore, 4 parts of a conductive brush component, 41 parts of a brush support, 42 parts of a conductive brush, 5 parts of an end cover, 6 parts of a bearing and 7 parts of a motor shaft.

The specific implementation mode is as follows:

for a better understanding of the objects, structure and function of the utility model, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

Referring to fig. 1 to 3, a bearing plate assembly is designed, which includes a plate body 1, the plate body 1 passes through a motor shaft 7 and is fixed on an end cover 5, the plate body 1 is circular, the upper end surface of the plate body 1 is an assembly surface 2, the lower end surface is a motor shaft end cover attachment surface 3, at least two sets of conductive brush assemblies 4 are uniformly distributed on the assembly surface 2, each conductive brush assembly 4 includes a brush holder 41, the brush holder 41 can be manufactured by a stamping process, a conductive brush 42 is arranged on the brush holder 41, the conductive brush 42 extends to the inner ring of the plate body 1 and points to the center of the plate body 1, the conductive brush 42 is ensured to be fully contacted with the motor shaft 7, the current on the motor shaft 7 is led to the plate body 1, the plate body 1 leads the current to the end cover 5 and then flows from the end cover 5 to a machine housing ground, so as to achieve the effect of protecting the bearing 6 from corrosion of the shaft current, and at least two sets of conductive brush assemblies 41 are uniformly distributed, the technical scheme is suitable for low-frequency shaft current and high-frequency shaft current, the number of the conductive brushes 42 and the amount of the conductive fibers can be calculated according to actual conditions, and the design is individual, simple in structure and convenient to operate, does not need a complex structure, can protect the bearing 6 from electric corrosion, reduces the cost and prolongs the service life of equipment; the annular pressing plate body 1 can provide more uniform acting force when limiting the axial movement of the bearing 6, and the annular inner ring penetrates through the motor shaft 7, so that the problem that the pressure of the special-shaped pressing plate in a horseshoe shape and the like is not uniform enough is solved.

The pressing plate body 1 is made of rigid plates, so that the pressing plate body 1 can provide better pressure. In the above embodiment, 3 examples are listed to realize the above technical solution:

example 1

The embodiment is that 2 equipartitions of assembly surface have three groups to lead electric brush subassembly 4, rivets on the brush holder 41 and leads electric brush 42, lead electric brush 42 and be the stainless steel fiber and lead electric brush, stainless steel fiber electric conductive property is more close pure metal, and its corrosion resistance is better, compares more wear-resisting, toughness better with the carbon fiber, easily makes, and the fault rate is low. Four assembly through holes 21 are uniformly distributed on the assembly surface 2, so that the whole stress of the pressing plate body is more uniform, and the stability is ensured. The rigid plate is a metal plate and is manufactured by a die-casting process, so that the rigid plate is suitable for the current industrial manufacturing habit and is low in manufacturing cost.

Example 2

In this embodiment, the brush holder 41 is welded with the conductive brush 42, and the conductive brush 42 is an organic conductive fiber conductive brush, which does not damage the surface of the contact object due to breakage or falling off. Six assembly through holes are uniformly distributed on the assembly surface 2, so that the whole stress of the pressing plate body is more uniform, and the stability is ensured. The rigid plate is a metal plate. The rigid plate is a plastic electroplating plate and is made by adopting processes such as injection molding and the like, so that the weight is lighter, the motor is lightened, and the industrial cost is low.

Example 3

This embodiment is brush holder 41 goes up bolted connection brush 42 that leads, 2 equipartitions of assembly surface have six assembly through-holes, can make the whole atress of clamp plate body more even, guarantee stability, assembly through-hole 21 is equipped with the counter bore at the assembly surface, can be when fixed connection, guarantees the roughness and the aesthetic measure of assembly surface. The motor shaft end cover binding surface 3 is provided with an electric brush support assembly through hole for fixedly mounting an electric brush support 41. The assembly hole of the electric brush support is provided with a position-avoiding counter bore 31 which is used for meeting the flatness of the binding surface of the end cover of the motor shaft and ensuring the working performance of the pressing plate when the processes such as bolt, riveting, welding and the like are carried out.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. The utility model provides a bearing clamp plate subassembly, includes clamp plate body (1), its characterized in that: the clamp plate is characterized in that the clamp plate body (1) is in a circular ring shape, the upper end face of the clamp plate body (1) is an assembly face (2), the lower end face of the clamp plate body is a motor shaft end cover binding face (3), at least two groups of conductive brush assemblies (4) are uniformly distributed on the assembly face (2), each conductive brush assembly (4) comprises a brush support (41), each brush support (41) is provided with a conductive brush (42), and each conductive brush (42) extends to the inner ring of the clamp plate body (1) and points to the circle center of the clamp plate body (1).

2. The bearing plate assembly according to claim 1, wherein said conductive brush (42) is a stainless steel fiber conductive brush.

3. The bearing plate assembly according to claim 1, wherein said conductive brush (42) is an organic conductive fiber conductive brush.

4. A bearing plate assembly according to claim 1, characterized in that said mounting surface (2) is uniformly provided with at least four mounting through holes (21).

5. A bearing plate assembly according to claim 4, characterized in that said assembly through hole (21) is countersunk at the assembly face.

6. The bearing plate assembly according to claim 1, wherein the pressure plate body (1) is made of a rigid plate material.

7. The bearing plate assembly of claim 6, wherein said rigid plate material is a metal plate material.

8. The bearing plate assembly of claim 6, wherein said rigid plate is a plastic plated plate.

9. The bearing plate assembly according to claim 1, wherein the motor shaft end cover abutting surface (3) is provided with a brush holder assembling through hole.

10. The bearing plate assembly according to claim 9, wherein a stop-off counterbore (31) is provided at the mounting hole of the brush holder.

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