JP3014812U - motor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a motor that can be easily positioned in the rotation direction in a detent state. [Structure] A rotor composed of an armature is rotatably arranged in a stator 7 in which a magnet is fixed to the inner circumference of a cylindrical yoke 1. The end covers 2 are attached to both ends of the stator 7, and the rotation shaft of the rotor 10 is rotatably supported by the end covers 2 via bearings. The protruding protrusions 17 are provided on the inner circumferences of both ends of the cylindrical yoke 1. A flange portion 19 is provided on the end surface of each end cover 2 along the inner circumference of the end cover 2.
0 is set.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a motor, and more particularly to an improvement in a rotational direction positioning structure of a cylindrical yoke of a stator and end covers that rotatably support a rotary shaft of a rotor at both ends thereof.

[0002]

[Prior art]

 In the motor, the cylindrical yoke of the stator and the end covers that rotatably support the rotary shaft of the rotor at both ends require positioning in the rotational direction for the following reasons.

(A) Since the force in the direction of rotation of the motor is received at the position where the cylindrical yoke and the end cover are positioned, particularly in a large motor, the rotational force is supported only by the through bolts that connect the end cover and the yoke. It may not be cut off and the through bolt may be broken.

(B) In a motor with a brush, it is necessary to position the position of the brush and the stator (magnet fixed to the yoke) in the rotational direction.

Therefore, in a small output motor, as shown in FIG. 5, "I" marks 3a and 3b are provided on the outer circumferences of the cylindrical yoke 1 and the end cover 2 by engraving or a felt-tip pen. , 3b were assembled together.

In the case of a motor requiring positioning strength in the rotational direction, as shown in FIG. 6, holes 4a and 4b are provided in the cylindrical yoke 1, the end cover 2, and the facing end face, and pins 4a and 4b are provided in these holes 4a and 4b. 5 was fitted and it was assembling.

[0007]

[Problems to be solved by the device]

 However, since the motor of type (a) does not receive the rotational force, there is a problem that it is not suitable for a high output motor. In the motor of type (b), holes 4a and 4b are provided in the cylindrical yoke 1, the end cover 2, and the facing end surface. Therefore, avoid using the pin 5 if a waterproof structure is required. Since it is necessary to provide an O-ring groove, it is necessary to increase the wall thickness of the cylindrical yoke 1 and the end cover 2, and there is a problem that post-processing is required to provide the O-ring groove.

An object of the present invention is to provide a motor that can easily be provided with positioning means in the rotation direction in a rotation stop state.

Another object of the present invention is to provide a motor capable of waterproofing the tubular yoke and the end cover without increasing the wall thickness.

[0010]

[Means for Solving the Problems]

 According to the present invention, a rotor composed of an armature is rotatably arranged in a stator having a magnet fixed to the inner circumference of a tubular yoke, end covers are attached to both ends of the stator, and the end covers are attached to the end covers. The improvement target is a motor in which the rotor's rotating shaft is rotatably supported via bearings.

In the motor according to the first aspect of the present invention, a projecting protrusion is provided on the inner circumference of both ends of the yoke, and a flange is provided on the end surface of each end cover along the inner circumference thereof. The collar portion is provided with a positioning groove into which the stamped convex portion of the yoke is fitted.

In the motor according to a second aspect, an O-ring groove is provided on an end surface of each of the end covers along the outer circumference of the flange portion, and an O-ring is fitted in the O-ring groove. And

[0013]

[Action]

 In this way, when the protruding protrusions provided on the inner circumferences of both ends of the yoke are fitted into the positioning grooves provided on the flanges along the inner circumference of the end surface of the end cover to perform positioning in the rotational direction, the positioning in the rotation-stopped state is performed. It is possible to support the rotational force even with a high output motor.

In this case, the embossed protrusions provided on the inner circumferences of both ends of the yoke can be formed by simple post-processing by pressing. Further, the positioning groove provided in the flange portion along the inner circumference of the end surface of the end cover can be formed together, for example, at the time of die casting, and post-processing is unnecessary.

Further, when an O-ring groove is provided on the end surface of each end cover along the outer periphery of the flange portion and an O-ring is fitted into the O-ring groove to form a waterproof structure, the opposing end surfaces of the yoke and the end cover are Since it does not have a pin that straddles, the waterproof structure can be achieved without increasing the wall thickness.

[0016]

【Example】

 1 to 4 show an embodiment of a motor according to the present invention. In the motor of this embodiment, a magnet 6 is fixed to the inner circumference of a cylindrical yoke 1 to form a stator 7, and a rotor 10 including an armature in which a coil 9 is wound around an iron core 8 is formed in the stator 7. It is rotatably arranged. The end covers 2 are attached to both ends of the stator 7 with bolts 11. At the center of each end cover 2, a rotary shaft 12 of a rotor 10 is rotatably supported via a bearing 13. A commutator 15 is supported on the outer periphery of the rotary shaft 12 in the cylindrical yoke 1 via an insulating seat 14, and a brush 16 is supported on the end cover 2 and is in contact with the commutator 15.

The projecting projections 17 are provided on the inner circumferences of both ends of the cylindrical yoke 1, respectively. The embossed protrusions 17 can be formed by simple post-processing by pressing. When the embossed protrusions 17 are provided on the inner circumferences of both ends of the cylindrical yoke 1, a recess 18 is formed on the outer circumference of the cylindrical yoke 1 correspondingly.

A flange portion 19 is provided on the end surface of each end cover 2 along the inner circumference thereof. The collar portion 19 is provided with a positioning groove 20 into which the stamped convex portion 17 of the tubular yoke 1 is fitted. However, in this case, when the radius of the bottom surface of the recess 18 is d1 and the radius of the center of the positioning groove 20 is d2, the condition of d1> d2 is required.

An O-ring groove 21 is provided on the end surface of each end cover 2 along the outer periphery of the collar portion 19, and an O-ring 22 is fitted in the O-ring groove 21.

When assembling the motor having such a structure, the protrusion convex portion 17 of the cylindrical yoke 1 is fitted into the positioning groove 20 of the collar portion 19 of the end cover 2 to determine the position, and the protrusion convex portion. The side surface 17a of the portion 17 and the inner surface 20a of the positioning groove 20 can absorb the force in the rotational direction. Further, due to the presence of the O-ring 22 fitted in the O-ring groove 21, waterproof property can be obtained.

The embodiments of the present invention have been described above. The main aspects of the present invention disclosed in this specification are as follows.

(1) A rotor, which is an armature, is rotatably arranged in a stator having a magnet fixed to the inner circumference of a cylindrical yoke, and end covers are attached to both ends of the stator, and In a motor in which the rotary shaft of the rotor is rotatably supported by bearings on an end cover, a protruding protrusion is provided on the inner periphery of both ends of the yoke, and a front protrusion is provided corresponding to the protruding protrusion. Recesses are provided on the outer circumferences of both ends of the yoke, and a flange portion is provided on the end surface of each end cover along the inner periphery thereof, and the protruding protrusions of the yoke are fitted to the flange portions. A motor having a positioning groove that allows the motor to move.

(2) The O-ring groove is provided on the end surface of each end cover along the outer periphery of the flange portion, and the O-ring is fitted in the O-ring groove. Mounted motor.

[0024]

[Effect of device]

 In the motor according to the present invention, the driving projections provided on the inner circumferences of both ends of the cylindrical yoke are fitted in the positioning grooves provided on the flanges along the inner circumference of the end surface of the end cover to determine the position in the rotation direction. Therefore, it is possible to perform positioning in a non-rotating state, and it is possible to support rotational force even with a high output motor.

In particular, the embossed protrusions provided on the inner circumferences of both ends of the yoke can be formed by a simple post-processing by press work, and the positioning groove provided on the flange along the inner circumference of the end face of the end cover is the same as that for die casting. The post-processing is unnecessary and the positioning part can be easily formed in the rotation stop state.

Further, when an O-ring groove is provided on the end surface of each end cover along the outer circumference of the flange portion and the O-ring is fitted into the O-ring groove to form a waterproof structure, the opposing end surfaces of the yoke and the end cover are formed. Since it does not have a pin that straddles, the waterproof structure can be achieved without increasing the wall thickness.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a motor according to the present invention.

FIG. 2 is a perspective view of a main part showing a state of a projecting protrusion provided on an inner circumference of an end portion of a cylindrical yoke and a positioning groove provided on a flange portion along an inner circumference of an end surface of an end cover in the present embodiment. Is.

FIG. 3 is a longitudinal cross-sectional view of a main portion showing a state of a projecting protrusion formed on an inner circumference of an end portion of a cylindrical yoke and a positioning groove formed on a flange portion along an inner circumference of an end surface of an end cover in the present embodiment. It is a figure.

FIG. 4 is a longitudinal sectional view of a main part showing a state in which an O-ring is arranged in an O-ring groove provided on the inner periphery of the end surface of the end cover in the present embodiment.

FIG. 5 is a main part perspective view showing a state of an I mark provided on the outer periphery of the end of the cylindrical yoke and an I mark provided on the outer periphery of the end of the end cover in the conventional example.

FIG. 6 is a perspective view of relevant parts showing a state in which pins are fitted to the end surface of the tubular yoke and the end surface of the end cover in the conventional example.

[Explanation of symbols]

 1 Cylindrical Yoke 2 End Covers 3a, 3b I Marks 4a, 4b Holes 5 Pins 6 Magnet 7 Stator 8 Iron Core 9 Coil 10 Rotor 11 Through Bolt 12 Rotating Shaft 13 Bearing 14 Insulator 15 Commutator 16 Brush 17 Protrusion Convex 18 Recessed portion 19 Collar portion 20 Positioning groove 21 O-ring groove 22 O-ring

Claims (2)

[Scope of utility model registration request] 1. A rotor having an armature is rotatably arranged in a stator having a magnet fixed to the inner circumference of a cylindrical yoke, and end covers are attached to both ends of the stator. In a motor in which a rotating shaft of the rotor is rotatably supported via bearings, a protruding protrusion is provided on both ends of the yoke, and end projections of the end covers are formed along the inner circumference of the end cover. A motor is characterized in that a flange portion is provided so as to project, and a positioning groove into which the punching convex portion of the yoke is fitted is provided in the collar portion. 2. An O-ring groove is provided on the end surface of each end cover along the outer circumference of the flange portion, and the O-ring groove is formed in the O-ring groove.
The motor according to claim 1, wherein a ring is fitted.