JPS6345830Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of an inner cylinder (inner yoke) in which a main magnetic pole of a closed DC rotating electrical machine is formed, which is formed into a hollow cylindrical shape and has a rotor winding body without an iron core.

A side sectional view of this type of conventional device is shown in FIG.

1 is the outer cylinder (outer yoke), 2 is the rotor, 3 is the inner cylinder (inner yoke), 4 is the rotating shaft, 5 is the main magnetic pole, 6
1 is a winding support, 7 and 8 are brackets, 9 is a brush device, and 10a and 10b are bearings.

An outer cylinder 1 and an inner cylinder 2 made of a magnetic material form a double cylinder, and a main magnetic pole 5 is installed on the outer periphery of the inner cylinder 2.

The rotor 2 is a rotor winding body, and is formed integrally with a round wire or a mechanically or chemically produced smooth wire made of synthetic resin into a hollow cylindrical shape.

The winding support 6 supports the rotor 2 on its outer circumferential side, and is fixed to the rotating shaft 4 on its inner circumferential side.

The bracket 7 is formed integrally with the inner cylinder 3, the inner cylinder 3 supports the main magnetic pole 5, and the outer cylinder 1 facing the main magnetic pole 5 across an air gap carries a magnetic material for closing the magnetic path of the main magnetic pole 5. Also serves as. Also, the brackets 7 and 8 are the bearing 1
The rotating shaft 4 is supported by 0a and 10b.
The brush device 9 is provided on the bracket 8,
It may be made to slide directly on a part of the rotor 2, thereby supplying or collecting current.

The heat generated in the rotor 2 is radiated to the outside through the entire surface of the outer cylinder 1, brackets 7, 8, etc. while circulating within the rotating electric machine by natural convection.

FIG. 2a shows a side sectional view showing the assembly of the conventional inner cylinder (inner yoke) 2 and main pole 5, and FIG. 2b shows a radial AA' sectional view.

The structure of the conventional inner cylinder 2 is that the magnetic path section and the bearing flange section 7 are an integral structure of the same material (magnetic material), and the magnetic path section is made of a material that matches the function of each part, that is, the magnetic path section is made of a material with good magnetic properties, and the bearing flange section is made of a material that matches the function of each part. The flange part is not made of high strength material. For this reason, the performance of the rotating electric machine is decreasing.

In addition, assembling the inner cylinder 3 and the main magnetic pole 5 requires heat work such as curing adhesive or welding.
Assembly work is not easy.

An object of the present invention is to provide a DC rotating electric machine that is adapted to the partial function of an inner cylinder and that is easy to assemble.

FIG. 3a is an axial sectional view of an embodiment of the present invention;
FIG. 3b is a sectional view taken along line B-B' in the radial direction.

30 is a magnetic path section of an inner cylinder made of laminated thin plates (for example, thin silicon steel plates), and 30a is a main magnetic pole 50 in the magnetic path section.
protrusions 50a for fixing at equal intervals in the circumferential direction;
is a groove in which the main magnetic pole 50 engages with the magnetic path portion protrusion 30a;
Reference numeral 11 denotes a holding plate for pressing the inner cylinder 30 and the main magnetic pole 50 against the bearing/flange portion, and 12 is a tightening screw for pressing the holding plate.

That is, in this embodiment, the main magnetic pole 5 is provided in the magnetic path section.
The inner cylinder 30 is made of laminated thin plates with good magnetic properties and has projections 30a that engage with the grooves 50 that fix the bearings at equal intervals in the circumferential direction, and the bearing flange part 7 is made of a strong material. It is composed of a holding plate 11 and a tightening screw 12, which have two functions: fixing the magnetic pole 50 in the axial direction and tightening the inner cylinder 30 made of laminated thin plates and the bearing flange portion 7.

FIG. 4a is an axial cross-sectional view of another embodiment of the present invention, and FIG. 4b is a radial cross-sectional view thereof taken along the line C-C'.

In this embodiment, a groove shape 31 is formed in the inner cylinder 30 in the axial direction to increase the heat radiation area to the inner cylinder.

FIG. 5a is an axial sectional view of another embodiment of the present invention, and FIG. 5b is a radial sectional view thereof taken along line D-D'.

In this embodiment, the inner cylinder part has a stepped shape 32 in the radial direction.
In this way, the heat dissipation area and magnetic path area of the inner cylinder 30 are increased.

Thus, according to the present invention, the inner cylinder (inner yoke)
By using laminated thin plates with good magnetic properties for the magnetic path and using strong materials for the bearing flange, the material composition matches the function of each part, improving the performance of the DC rotating electric machine.

Furthermore, the main magnetic pole can be fixed at precise intervals in the circumferential direction due to the freely punched shape of the laminated thin plates, and the axial fixation can be done at the same time as the entire inner cylinder, making it easy to assemble DC rotating electric machines. becomes easier.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of the conventional device, Figure 2a is an axial sectional view of its inner cylinder, and Figure 2b is its radial direction A.
-A' sectional view, FIG. 3a is an axial sectional view of one embodiment of the present invention, FIG. 3b is a radial direction B-B' sectional view thereof, and FIG. 4a is another embodiment of the present invention. 4b is a sectional view in the radial direction C-C', FIG. 5a is an axial sectional view of another embodiment of the present invention, and FIG. 5b is a sectional view in the radial direction D-D. 'It is a sectional view. 1... Outer cylinder (outer yoke), 2... Rotor, 3
... Inner cylinder (inner yoke), 4 ... Rotating shaft, 5 ...
Main pole, 6... Winding support, 7, 8... Bracket, 9... Brush device, 10a, 10b... Brush device, 11... Holding plate, 12... Tightening screw, 30
... Inner cylinder (thin plate lamination), 30a ... Its protrusion, 3
1...groove, 32...different level, 50...main magnetic pole, 5
0a... Groove in which the main magnetic pole 50 engages with the magnetic path portion protrusion 30a.

Claims (1)

[Scope of utility model registration request] An even number of main magnetic poles are arranged on the outer periphery of a double cylinder made of a magnetic material, and a winding support is formed in a hollow cylindrical shape in the radial gap between the main magnetic poles and the outer cylinder. In a DC rotating electrical machine that is provided with a rotor winding body without an iron core, which is fixed to a rotating shaft by means of axial protrusions having engaging protrusions for use are provided at equal intervals in the circumferential direction, and axial engagement grooves are provided on both sides of the main magnetic pole to engage with the engaging parts of the protrusions, A direct current rotating electric machine, wherein the main magnetic pole is engaged and fixed between respective protrusions of the inner cylinder.