CN210404930U

CN210404930U - Brush plate system for vehicle motor and vehicle motor

Info

Publication number: CN210404930U
Application number: CN201921466204.9U
Authority: CN
Inventors: 周勇; 熊慧民; 吴国献
Original assignee: Shanghai Brose Electric Motors Co Ltd
Current assignee: Shanghai Brose Electric Motors Co Ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-04-24
Anticipated expiration: 2029-09-03

Abstract

The utility model provides an electric brush board system and vehicle motor for vehicle motor. The brush plate system includes a commutator fixed to a motor shaft, a brush tube fixed to the motor shaft, and a brush slidably disposed in the brush tube by a biasing action of a spring to contact the commutator. According to the utility model discloses, brush tube axis forms nonzero contained angle with the commutator axis. According to the utility model the motor include foretell brush board system. The utility model discloses an electric brush board system improves the acoustics performance of motor, prevents ripple performance and EMC performance.

Description

Brush plate system for vehicle motor and vehicle motor

Technical Field

The utility model relates to a vehicle motor field. In particular, in a first aspect, the present invention relates to a brush plate system for a vehicle electric machine. In a second aspect, the present invention relates to a vehicle electric machine including such a brush plate system.

Background

In vehicle manufacturing, electric machines are very important components. One type of vehicle motor that is currently known includes a brush plate system 1 ', as shown in fig. 1, that includes a commutator 10', a brush tube 20 ', and brushes 30', the commutator 10 'being fixed to a motor shaft (not shown), the brush tube 20' being fixed to a brush plate (not shown), which is fixed to a motor housing (not shown), and the brushes 30 'being slidably disposed within the brush tube 20' by the biasing action of springs 40 'to contact the commutator 10'. In prior designs, the brush tube (center) axis a1 'of brush tube 20' and commutator (center) axis a2 'of commutator 10' coincide, and spring 40 'acts centrally on brush 30', i.e., on the center of the end of brush 30 'opposite the end used to contact commutator 10'.

With this design, there will always be a gap 50 between the brush tube 20 'and the brush 30' due to manufacturing tolerances. As shown in fig. 1A and 1B, when the motor including the brush plate system 1 ' is operated (whether the commutator 10 ' is rotated counterclockwise ccw or clockwise cw), the brushes 30 ' may be inclined such that the brushes 30 ' are in contact with the commutator 10 ' only on one side SC, which results in poor commutation conditions and thus poor acoustic performance, ripple prevention performance, and EMC performance of the motor.

Disclosure of Invention

The utility model provides an electric brush board system, it can overcome above-mentioned shortcoming.

In a first aspect, a brush plate system includes a commutator, a brush tube and a brush, the brush tube and the commutator being secured to a brush plate, the brush plate being secured to a motor housing, and the brush being slidably disposed within the brush tube by a biasing action of a spring to contact the commutator. According to the utility model discloses, brush tube axis forms nonzero contained angle with the commutator axis.

Preferably, the brush plate system further comprises at least one of the following features: the end of the brush opposite to the end for contacting the commutator is chamfered; and a spring eccentrically acting on the brush.

Preferably, the direction of the bevel is the same as the direction of inclination of the brush tube, relative to an axis perpendicular to the commutator axis.

Preferably, the brush is divided into a larger portion and a smaller portion with respect to a central axis of the brush, and the spring acts on the larger portion.

According to the utility model discloses an embodiment is equipped with two brush tubes, and it arranges along the circumference interval 90 or 180 degrees of commutator.

In a second aspect, the present invention provides a vehicle electric machine comprising a brush plate system as described above.

According to the utility model discloses a brush board system can keep brush and commutator to contact completely during motor operation throughout to improve the acoustics performance of motor, prevent that ripple performance and EMC performance are all relatively poor. In addition, the service life of the brush plate system is prolonged.

Drawings

In the drawings, embodiments of the invention are shown in simplified form for the sake of clarity. Like reference numerals refer to like parts throughout the drawings.

In the drawings:

FIGS. 1, 1A and 1B are schematic diagrams of prior art brush plate systems; and

fig. 2 is a schematic diagram of a brush plate system according to an embodiment of the present invention.

Detailed Description

An embodiment of the present invention is described below with reference to fig. 2.

Fig. 2 shows a brush plate system according to an embodiment of the present invention, as shown, the brush plate system 1 includes a commutator 10, a brush tube 20, and a brush 30, the commutator 10 is fixed to a motor shaft (not shown), the brush tube 20 is fixed to a brush plate (not shown), the brush plate is fixed to a motor housing (not shown), and the brush 30 is slidably disposed in the brush tube 20 by a biasing action of a spring 40 to contact the commutator 10, fig. 2 also shows that a brush tube axis a1 forms a non-zero included angle α with a commutator axis a2, that an end of the brush 30 opposite to an end for contacting the commutator 10 is chamfered, and the spring 40 acts eccentrically on the brush 30, i.e., acts at a position offset from a center of an end of the brush 30 opposite to an end for contacting the commutator 10.

Fig. 2 also shows that the direction of the bevel is the same as the direction of inclination of the brush tube, relative to an axis perpendicular to the commutator axis a1, i.e., the direction of the bevel (inclination) is inclined from right to left, and the direction of inclination of the brush tube 20 is also from right to left, as shown in fig. 2. Further, the brush 30 is divided into a larger portion 31 and a smaller portion 32 with respect to the central axis of the brush 30, and the spring 40 acts on the larger portion 31.

The brush plate system typically includes two sets of brush tubes, brushes and springs, each set being spaced 90 or 180 degrees apart circumferentially along the commutator. However, for clarity, only one set is shown in the figure.

With the design of fig. 2, when the motor is operated (regardless of whether the commutator 10 is rotated counterclockwise ccw or clockwise cw), the brush 30 is not tilted so that the brush 30 is always in full contact FC with the commutator 10, and thus the acoustic performance, ripple prevention performance, and EMC performance of the motor are improved.

The embodiments discussed in the detailed description and illustrated in the figures are merely illustrative exemplary embodiments. In some cases, the features disclosed in the present invention may be used independently of other features. On the other hand, when necessary, the features disclosed in the present invention may be combined to provide various combinations.

List of reference numerals

1' Brush plate System

10' commutator

20' brush sleeve

30' brush

40' spring

50' gap

A1' brush sleeve axis

A2' commutator axis

1 Brush plate System

10 commutator

20 electric brush sleeve

30 electric brush

40 spring

A1 brush sleeve axis

A2 commutator brush axis

SC side contact

FC full contact

cw clockwise

ccw counter clockwise

α included angle of axis

Claims

1. A brush plate system for a vehicle electric motor comprising a commutator fixed to a motor shaft, a brush tube fixed to a brush plate fixed to a motor housing, and brushes slidably disposed in the brush tube by a spring bias to contact the commutator, wherein the brush tube axis forms a non-zero angle with the commutator axis.

2. The brush plate system of claim 1, further comprising at least one of the following features: the end of the brush opposite to the end for contacting the commutator is chamfered; and a spring eccentrically acting on the brush.

3. A brush plate system according to claim 2, characterized in that the direction of the chamfer is the same as the direction of inclination of the brush tube, with respect to an axis perpendicular to the commutator axis.

4. A brush plate system according to claim 2, wherein the brush is divided into a larger portion and a smaller portion with respect to a central axis of the brush, the larger portion being acted upon by the spring.

5. A brush plate system according to any one of claims 1-4, characterized in that the brush plate system is provided with two brush tubes, which are arranged at 90 or 180 degrees intervals in the circumferential direction of the commutator.

6. A vehicle electrical machine comprising a brush plate system according to any one of claims 1-5.