JP4636362B2 - Electric motor - Google Patents

Description

The present invention relates to an electric motor .

FIG. 7 is a perspective view showing a rotating electrical machine according to the first prior art.
In FIG. 7, 21 is a stator, 22 is an anti-load side bracket, 23 is an anti-load side support base, 24 is a load side support base, 25 is an overall support base, 26 is a rotating shaft, 27 is a bolt, and 28 is a fixed base. It is.
A load-side support base 24 is fixed to the load side of the stator 21 (the direction in which the rotary shaft 26 comes out and a load is applied), and an anti-load-side support base 23 is fixed to the anti-load side (the direction opposite to the load side). The load-side support base 24 and the anti-load-side support base 23 are fixed to an overall support base 25, and the overall support base 25 is installed on a fixed base 28. In particular, in an elevator hoisting machine in which a downward load is applied to the rotary shaft 26, it is necessary to fix the stator 21 so that the load side does not deform downward and the anti-load side does not deform upward. In other words, both ends are supported by the anti-load side support base 23, and the whole support base 25 is fixed to the length L1 in the axial direction.
FIG. 8 is a side sectional view showing a rotating electrical machine according to the second prior art (see Patent Document 1).
In FIG. 8, 1 is a machine base, 2A and 2B are iron core holding plates, 3 is a stator, 4 is a mirror plate, 4a is an exhaust hole, 5 is an outer cover, 5a is an inlet, 6 is an inner cover, and 7A and 7B are Bearings 7a and 7b are rolling bearings, 8B is a bearing base, 9 is a rotary shaft, 9a is a key, 10 is a mesh wheel, 10a is a boss, 11 is a rotor core, 11a is a cooling hole, and 12 is a stator winding. , 14 are ventilation openings, 15 is an exhaust pipe, 15a is an exhaust fan, 16, 16a and 17 are ducts, and 19 is a ventilation pipe.
This second prior art is an elevator hoisting machine including a mesh wheel 10 mounted on a rotating shaft 9, and the rotating electric machine is covered with an outer cover 5, and outside air is introduced by an exhaust fan 15a, and a stator winding is performed. The wire 12 and the rotor core 11 are cooled.
In this case, the iron core holding plates 2A and 2B are fixed to both ends of the stator 3, but this alone cannot withstand the downward load applied to the net 10 and the rotating electric machine is deformed.
Therefore, the rotating shaft 9 is lengthened, and the bearing base 8B and the bearing 7B are provided at the tip of the rotating shaft 9, and are fixed at a length L2 from the core holding plate 2A to the bearing base 8B.
JP-A-9-56120 (page 7, FIG. 1)

However, such conventional techniques have the following problems.
(1) In the structure of the rotating electrical machine according to the first prior art, the axial length of the entire support base cannot be shortened in order to prevent the deformation of the rotating electrical machine, but the length of the fixed base, that is, the length required for installation It is necessary to secure it for a long time.
(2) In the structure of the rotating electrical machine according to the second prior art, the rotating shaft becomes longer and the bearing stand is added, making the rotating electrical machine and equipment larger and heavier, the length required for installation is further increased, and the assembly time is also increased. become longer.
The present invention has been made to solve such a problem, and can reduce the size and weight of parts and devices, shorten the installation length, and further reduce the assembly time. The purpose is to provide an electric machine.

In order to solve the above problems, the present invention is configured as follows.
The invention described in claim 1 is an electric motor used in an elevator hoisting machine, wherein a stator is configured by mounting a stator coil on a cylindrical stator core, and on the load side of the stator. A support base that is fixed and fixed from above with respect to a fixed base having a horizontal plane, an anti-load side bracket that is fixed to the anti-load side of the stator, and the support base and the anti-load that are horizontally oriented A rotating shaft that is rotatably supported by a side bracket via a bearing, and a rotor disposed opposite to the inner peripheral surface of the stator via a radial gap, the anti-load side By fixing the bracket to the support base with a joint provided below the rotary shaft, an upward deformation on the non-load side of the stator when a downward load is applied to the load side end of the rotary shaft which is characterized in that suppresses A.

The present invention has the following effects.
(1) According to the invention described in claim 1, the support base is fixed to the load side of the stator, the anti-load side bracket is fixed to the anti-load side, and the anti-load side bracket is further below the rotary shaft. It is structured to be fixed to the support base by the provided joint, and the parts and device can be reduced in size and weight, and the length for fixing, that is, the length of the support base in the axial direction is shortened. Thus, the installation length can be shortened and the assembly time can be further shortened . Further, the anti-load side bracket is fixed to the support base by a joint provided below the rotary shaft, so that the stator is counteracted when a downward load is applied to the load side end of the rotary shaft. An upward deformation on the load side can be suppressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a rotating electrical machine in the first embodiment of the present invention, FIG. 2 is a view showing the rotating electrical machine in the first embodiment of the present invention, (a) is a configuration diagram, and (b) is an assembly. FIG.
1 and 2, 21 is a stator, 26 is a rotating shaft, 27 is a bolt, 28 is a fixing base, 31a is an anti-load side bracket, 32a is a support base, 33 is a joint, 34 is an anti-load side bearing, and 35 is A load-side bearing, L3, is the axial length of the support base 32a.
A load-side bearing 35 and a support base 32a are fixed to the load side of the stator 21, an anti-load side bearing 34 and an anti-load side bracket 31a are fixed to the anti-load side by bolts 27, and the anti-load side bracket 31a is The joint 33 is fixed to the support base 32a. Here, the support base 32a has an axial length of L3 and also serves as a load side bracket.
Here, the effect of the joint 33 will be described. 3A and 3B are diagrams showing the rotating electric machine according to the first embodiment of the present invention, in which FIG. 3A is a configuration diagram when there is no joint, FIG. 3B is a modified view when a load is applied in FIG. c) is a modified view when a load is applied in the configuration in which there is a joint.
In FIG. 3, 21 is a stator, 26 is a rotating shaft, 31a is an anti-load side bracket, 32a is a support base, 33 is a joint, and P is a load. First, in a configuration without a joint, when a downward load P is applied to the rotary shaft 26, as shown in FIG. 3B, the support base 32a receives a moment, and the load side of the stator 21 is directed downward to be anti-loading. The side deforms upward. On the other hand, when the joint 33 is present, the anti-load side bracket 31a is fixed to the support base 32a via the joint 33. Therefore, as shown in FIG. Even if a downward load P is applied, it does not deform.
The present invention differs from the first prior art in that the stator is supported on one side instead of on both sides, and the length of the support base in the axial direction is shortened. Further, the difference from the second prior art is that no bearing stand is provided for supporting the rotating shaft. According to the present invention, parts and devices can be reduced in size and weight, the length for fixing, that is, the length in the axial direction of the support base can be shortened, and the installation length can be shortened. Can be shortened.

4A and 4B are diagrams showing a rotating electrical machine according to a second embodiment of the present invention, in which FIG. 4A is a configuration diagram and FIG. 4B is an assembly diagram.
In FIG. 4, a support base 32b is fixed to the load side of the stator 21, and an anti-load side bracket 31a is fixed to the anti-load side. Here, the support base 32b has a shape in which the support base 32a and the joint 33 in the first embodiment are integrated, and is provided with a matching portion 40 at a portion to which the anti-load side bracket 31a is fixed. It is manufactured by cutting with NC machine tools or casting.
Thereby, the number of parts can be further reduced, and the assembly time can be shortened.

5A and 5B are diagrams showing a rotating electrical machine according to a third embodiment of the present invention, in which FIG. 5A is a configuration diagram and FIG. 5B is an assembly diagram.
In FIG. 5, the support base 32a is fixed to the load side of the stator 21, and the anti-load side bracket 31b is fixed to the anti-load side. Here, the anti-load side bracket 31b has a shape in which the anti-load side bracket 31a and the joint 33 in the first embodiment are integrated, and is provided with a matching portion 41 at a portion fixed to the support base 32a. It is manufactured by welding the load side bracket 31a and the joint 33, cutting by an NC machine tool or the like, or casting.
As a result, the bolts 27 for fixing the anti-load side bracket 31b are concentrated on one surface, and the lower part of the anti-load side bracket 31b interferes with a fixing base or the like so that the tool does not enter, or the rotational operation angle of the tool is slightly increased. The problem that it can only be removed is eliminated. That is, it is possible to easily remove and attach the anti-load side bracket not only at the time of assembly but also at regular inspections.

6A and 6B are diagrams showing a rotating electrical machine according to a fourth embodiment of the present invention, in which FIG. 6A is a configuration diagram and FIG. 6B is an assembly diagram.
In FIG. 6, a support base 32c is fixed to the load side of the stator 21, and an anti-load side bracket 31c is fixed to the anti-load side. Here, the support base 32c has a shape in which the support base 32a, the joint 33, and a part of the anti-load side bracket 31a according to the first embodiment are integrated, and is aligned with a portion to which the anti-load side bracket 31c is fixed. 42, and is manufactured by welding of the support base 32a and the joint 33, and a part of the anti-load side bracket 31a, cutting by an NC machine tool or the like, or casting. Further, the anti-load side bracket 31c is the anti-load side bracket 31a according to the first embodiment provided with an alignment portion 43 by cutting a portion facing the alignment portion of the support base 32c.
Thereby, the said anti-load side bracket 31c becomes light, and the removal and attachment operation | work of the anti-load side bracket not only at the time of an assembly but periodic inspection etc. can be made easy.

It is a perspective view which shows the rotary electric machine in the 1st Example of this invention. It is a figure which shows the rotary electric machine in 1st Example of this invention, (a) is a block diagram, (b) is an assembly drawing. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the rotary electric machine in 1st Example of this invention, (a) is a block diagram when there is no joint, (b) is a deformation | transformation figure when a load is added in (a), (c) is It is a deformation | transformation figure when a load is added by the structure in case there exists a joint. It is a figure which shows the rotary electric machine in the 2nd Example of this invention, (a) is a block diagram, (b) is an assembly drawing. It is a figure which shows the rotary electric machine in the 3rd Example of this invention, (a) is a block diagram, (b) is an assembly drawing. It is a figure which shows the rotary electric machine in the 4th Example of this invention, (a) is a block diagram, (b) is an assembly drawing. It is a perspective view which shows the rotary electric machine in 1st prior art. It is a sectional side view which shows the rotary electric machine in 2nd prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine base 2A, 2B Iron core holding plate 3, 21 Stator 4 End plate 4a Exhaust hole 5 External cover 5a Suction port 6 Internal cover 7A, 7B Bearing 7a, 7b Rolling bearing 8B Bearing base 9, 26 Rotating shaft 9a Key 10 10a Boss portion 11 Rotor core 11a Cooling hole 12 Stator winding 14 Ventilation hole 15 Exhaust pipe 15a Exhaust fans 16, 16a, 17 Duct 19 Ventilation pipes 22, 31a, 31b, 31c Anti-load side bracket 23 Anti-load side support base 24 Load side support base 25 Overall support base 27 Bolt 28 Fixing bases 32a, 32b, 32c Support base 33 Joint 34 Anti-load side bearing 35 Load side bearings 40, 41, 42, 43 Matching portions B1, B2, B21, B3, B5 , B6, B7 Cooling air L1 Overall support stand length L2 Length from core presser plate to bearing stand L3 Support stand axial length P Load

Claims (1)

An electric motor used in an elevator hoisting machine,
A stator configured by mounting a stator coil on a cylindrical stator core; and
A support base fixed to the load side of the stator and fixed from above with respect to a fixed base having a horizontal plane;
An anti-load side bracket fixed to the anti-load side of the stator;
It has a rotating shaft that is directed horizontally and is rotatably supported by the support base and the anti-load side bracket via a bearing, and faces the inner peripheral surface of the stator via a radial gap. An arranged rotor,
The anti-load side of the stator when a downward load is applied to the load side end of the rotary shaft by fixing the anti-load side bracket to the support base by a joint provided below the rotary shaft An electric motor characterized by suppressing upward deformation in the motor.

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