JPH11308830A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix the stator and motor bracket of a motor which is driven by an inverter to operate as a DC brushless motor and has a surface magnet type rotor fixed surely to each other, without using a strong mechanical force such as push-in force, etc., and further, facilitate its assembly. SOLUTION: A stator 11 with salient poles 12 is provided outside a rotor 1 with permanent magnets 2 and a motor bracket 20 is provided outside the stator 11. The stator 11 has a stator core 17 composed of a plurality of core segments 13 with shapes divided for each salient pole 12 or for every predetermined number of salient poles 12. The core segments 13 have ruggedness 14 which are provided on both their ends. After the respective ruggedness 14 are mated with each other, the core segments 13 are held and pressed between rings 15 and pins 16 are made to pierce through the core segments 13 and rings 15. The motor bracket 20 is fixed to the stator core 17 with a plurality of protrusions 21 provided in the upper part of its inside and a plurality of claws 22 bent toward the inside. The claws 22 has sandwiched the pins 16 sandwiched, bent and folded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a motor having a surface magnet type rotor driven by an inverter and operating as a DC brushless motor.

[0002]

2. Description of the Related Art Conventionally, this type of motor has been configured as shown in FIG. Hereinafter, the configuration will be described.

As shown in FIG. 3, a rotor 1 has a permanent magnet 2
And rotatably supported by the shaft 3. The stator 4 is provided outside the rotor 1, has a circular outer periphery, punches a core sheet so as to form salient poles 5, stacks the core sheets, press-fits a plurality of pins 6, and presses an insulating material 7.
The winding 8 is provided through the wire. The motor bracket 9 is
Claw 10 provided on the end face by inserting or press-fitting stator 4
Was bent and fixed to form a motor.

[0004]

However, in the above-mentioned conventional structure, when a rotational force is applied to the rotor 1, the stator 4 is applied with a force to move in the opposite direction due to the reaction, so that the pressure applied to the motor bracket 9 of the stator 4 is reduced. To strengthen the input,
It is required to increase the strength of the claw 10, which causes a problem that an excessive force is applied to the stator and that assembly and manufacturing are difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to securely fix a stator and a motor bracket without increasing mechanical force such as press-fitting, and to facilitate assembly and manufacture. I have.

[0006]

In order to achieve the above object, the present invention provides a stator having salient poles outside a rotor having a permanent magnet and a motor bracket outside the stator. A stator core formed by fitting concave and convex portions provided at both ends of a plurality of core pieces of a shape divided for each or every few poles and pressing them with a ring, and penetrating a pin through the core piece and the ring, The motor bracket is fixed to the stator core with a plurality of protrusions provided on an upper inside and a plurality of claws bent inward, and the claws are bent with pins interposed therebetween.

Thus, the stator and the motor bracket can be securely fixed without increasing mechanical force such as press-fitting, and assembly and manufacture can be facilitated.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention provides a rotor having a permanent magnet, a stator having salient poles provided outside the rotor, and a motor bracket located outside the stator. The stator includes a plurality of core pieces each having a shape divided for each salient pole or every few poles, a ring for pressing the plurality of core pieces, and concave and convex portions provided at both ends of the core pieces. The motor bracket has a plurality of projections provided on an inner upper side and a plurality of inwardly bent claws fixed to the stator core. Then, the claw is bent with a pin interposed therebetween, and the stator and the motor bracket can be securely fixed without increasing mechanical force such as press-fitting,
In addition, assembly and manufacture can be facilitated.

According to a second aspect of the present invention, in the first aspect of the present invention, the motor bracket has a plurality of claw members that are bent to form a claw, and a part of the claw member is bent. When the motor bracket is reused by disassembling it due to a defect of the stator, etc., if the claws once bent are returned to the original position, they will be broken or the holding force will be weak. By bending another nail member, the initial mechanical strength can be secured.

According to a third aspect of the present invention, in the first aspect of the present invention, the motor bracket has a plurality of claw members which are bent to form claws, and at least one of the bent claws is a pin. The left and right claw members at different positions are bent and fixed to the stator core.When the motor is rotated in both left and right directions, when the rotor is subjected to rotational force, the reaction acting on the stator Movement can be suppressed.

[0011] The invention described in claim 4 is the above-mentioned claim 1-
3. The invention according to claim 3, further comprising a connector for supplying power to the winding wound around the stator, wherein the connector case is provided with a hole in which a pin can be fitted, and the connector is fixed by the pin. By doing so, the connector can be firmly fixed.

[0012] The invention described in claim 5 is the above-mentioned invention.
3. The invention according to claim 3, further comprising a sensor for detecting a position of the permanent magnet, wherein the sensor is provided with a hole in which a pin can be fitted, and fitted with the pin. Accurate positioning and accurate rotation control.

[0013] The invention described in claim 6 is the above-mentioned claim 1-
In the invention described in Item 6, the ring has an outer shape smaller than the outer shape of the stator, and a projection provided on an upper inner portion of the motor bracket is applied to the stator core. However, when two types of stators are used, including the case where the fixing ring is not used, the position of the stator can be adjusted with the same motor bracket, and the sensor can be used without changing the position.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) As shown in FIG. 1, a stator 11 is formed by fitting concave and convex portions 14 provided at both ends of a plurality of core pieces 13 each having a shape divided into salient poles 12 or several poles. The stator core 17 has a pin 16 penetrating through the core piece 13 and the ring 15 through the pin 15.
have. A winding 19 is applied to the stator core 17 via an insulating material 18.

The motor bracket 20 has a plurality of projections 21 at the upper portion on the inner side, and is bent to the end face to form a claw 22.
Is fixed to the stator core 17 with a plurality of projections 21 provided on the upper inside and a plurality of claws 22 bent inward, and the claws 22 are bent with the pin 16 interposed therebetween. I have. Here, a part (for example, about ２) of the claw member 23 is bent so that the motor bracket 20 is fixed to the stator core 17. Is bent.

The operation of the above construction will be described. By rotating the claw 22 with the pin 16 penetrating through the stator core 17 interposed therebetween, the rotational force of the rotor 1 acting on the stator core 17 due to the reaction of the rotor 1 can be stopped by the pin 6.

Further, since the rotational force applied to the stator core 17 can be stopped by the pins 16, the stator core 17 and the motor bracket 20 can be securely fixed even when inserted, and the assembly process can be facilitated.

Also, a part of the claw member 23 is bent,
Since the motor bracket 20 is fixed to the stator core 17, when the motor bracket 20 is disassembled due to a defect of the stator 11 or the like, and the motor bracket 20 is reused, the claw 22 that has been bent once is returned to its original position, and the pressing force is reduced. By bending another claw member 23 for weakening, an initial mechanical strength can be secured.

Further, since at least one of the bent claws 22 is formed by bending the claw members 23 at different positions of the pin 16 to be fixed to the stator core 17, when the motor is rotated in both the left and right directions, it is used. In addition, when a rotational force is applied to the rotor 1, movement due to a reaction acting on the stator 11 can be suppressed.

(Embodiment 2) As shown in FIG. 2, the connector 24 supplies power to the winding 19 wound around the stator 11 and has a hole in which the pin 16 can be fitted in the case of the connector 24. 25 are provided, and the pins 16 are fitted. The sensor 26 detects the position of the permanent magnet 2 of the rotor 1. The sensor 26 has a hole 27 into which the pin 16 can be fitted, and the pin 16 is fitted.

The ring 28 has an outer shape of the stator 11.
Of the motor bracket 20, and the convex portion 21 provided on the upper inside of the motor bracket 20 is brought into contact with the stator core 17. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. By fixing the connector 24 with the pins 16, the connector 24 can be easily and firmly fixed. Also, by fixing the sensor 26 with the pin 16,
Accurate positioning with the stator 11 can be performed, and accurate rotation control can be performed.

When the stator core 17 is inserted into the motor bracket 20 and is fixed to the projection 21 provided inside, the stator 21 is received by the stator core 17 so that the stator core 17 is not divided but circular. In the case where two types of stators are used, including the case where they are stamped out and the fixing ring 15 is not used, the same motor bracket 20 can be used to adjust the position of the stator, and the sensor can be used without changing the position.

[0025]

As described above, according to the first aspect of the present invention, a rotor having a permanent magnet, a stator having salient poles provided outside the rotor, and a A plurality of core pieces having a shape divided for each salient pole or for every few poles, and a ring for pressing the plurality of core pieces,
A stator core formed of pins for fitting concave and convex portions provided at both ends of the core piece with each other so as to penetrate and fix the core piece and the ring, wherein the motor bracket has a plurality of convex portions provided on an upper inside portion; And a plurality of claws bent inward to the stator core, and the claws are bent with pins interposed therebetween, so that the stator and the motor bracket can be securely fixed without increasing the mechanical force such as press-fitting. As a result, the rotational force due to the reaction of the rotor on the stator core can be stopped with a pin, and the assembly and manufacture can be facilitated.

According to the second aspect of the present invention, the motor bracket has a plurality of claw members which are bent to form claws, and a part of the claw members is bent and fixed to the stator core. Therefore, when disassembling due to a defective stator, etc., and reusing the motor bracket, it is necessary to return the claws once folded, or break the holding force, so bend another claw member. so,
Initial mechanical strength can be secured.

According to the third aspect of the present invention, the motor bracket has a plurality of claw members that are bent to form claws, and at least one of the bent claws is a claw whose pin is located at a different position on the left and right of the pin. Since the member for use is bent and fixed to the stator core, even when the motor is used by rotating the motor in both the left and right directions, it is possible to suppress the movement due to the reaction acting on the stator when a rotational force is applied to the rotor.

According to the fourth aspect of the present invention, there is provided a connector for supplying power to the winding wound on the stator, and the connector case is fitted with a hole in which a pin can be fitted. Therefore, the connector can be firmly fixed by fixing the connector with the pin.

According to the fifth aspect of the present invention, there is provided a sensor for detecting the position of the permanent magnet, and the sensor is provided with a hole in which a pin can be fitted. By doing so, accurate positioning with the stator can be performed, and accurate rotation control can be performed.

According to the sixth aspect of the present invention, the outer shape of the ring is smaller than the outer shape of the stator, and the projection provided on the upper inside of the motor bracket is brought into contact with the stator core. Without using a fixing ring,
When two types of stators are used, the positions of the stators can be matched with the same motor bracket, and the sensors can be used without changing the positions.

[Brief description of the drawings]

FIG. 1A is a sectional view of a motor according to a first embodiment of the present invention. FIG. 1B is a bottom view of the motor.

2A is a sectional view of a motor according to a second embodiment of the present invention. FIG. 2B is a bottom view of the motor.

FIG. 3 (a) Cross-sectional view of a conventional motor (b) Bottom view of the motor

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotor 2 Permanent magnet 11 Stator 12 Salient pole 13 Core piece 14 Concavo-convex part 15 Ring 16 Pin 17 Stator core 20 Motor bracket 21 Convex part 22 Claw

Continuing on the front page (72) Inventor Kenichi Akasaka 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Toshihiko Ura 1006 Kadoma Kadoma, Kadoma City Osaka Pref.

Claims (6)

[Claims] 1. A rotor having a permanent magnet, a stator having salient poles provided outside the rotor, and a motor bracket located outside the stator, wherein the stator is provided for each salient pole or every few poles. A plurality of core pieces divided into a shape, and a ring for pressing the plurality of core pieces,
A stator core formed of pins for fitting concave and convex portions provided at both ends of the core piece with each other so as to penetrate and fix the core piece and the ring, wherein the motor bracket has a plurality of convex portions provided on an upper inside portion; And a plurality of claws bent inward to the stator core, and the claws are bent with pins interposed therebetween. 2. The motor according to claim 1, wherein the motor bracket has a plurality of claw members that are bent to form claws, and a part of the claw members is bent to be fixed to the stator core. 3. The motor bracket has a plurality of claw members which are bent to form claws, and at least one of the bent claws is formed by bending a claw member at a position different from the left and right of the pin to be fixed to the stator core. The motor according to claim 1. 4. The connector according to claim 1, further comprising a connector for supplying power to the winding wound on the stator, wherein a hole is provided in a case of the connector so that a pin can be fitted thereto. Motor as described. 5. The motor according to claim 1, further comprising a sensor for detecting a position of the permanent magnet, wherein the sensor is provided with a hole in which a pin can be fitted. 6. The ring according to claim 1, wherein the outer shape of the ring is smaller than the outer shape of the stator, and a convex portion provided on the upper inside of the motor bracket is brought into contact with the stator core.
Motor according to item.