JPH11178312A - Variable gas type motor with eccentric rotor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable gas type motor the pin and pin through-hole of the output transmission mechanism of which are prevented from wearing by eliminating the small teeth of a stator and a rotor in order prevent the generation of noise. SOLUTION: A motor is provided with a plurality (m) (where (m) is a positive integer) of salient poles P formed protrudingly toward its inside, a stator 2 with the salient poles P disposed at intervals of the even pitch angle in a circumferential direction, and a rotor 4 which is rotatably supported around an axis eccentric from the central axis of the stator 2, and has a plurality of rotor segments 3 formed with a plurality (n) (where (n) is a positive integer satisfying. n<=(m-1) or n>=(m+1)) permanent magnets M, the polarity of which is changed alternately along the circumferential direction, at its outer periphery. In this case, by exciting the salient poles P sequentially and attracting the permanent magnets M sequentially, it is possible to make the motor rotate by itself by a difference between the numbers of the salient poles P and the permanent magnets M, while making eccentrically revolving the rotor 4 in the stator 2 autorotate eccentrically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable gap motor having an eccentric rotor, and more particularly to a variable gap motor having a rotor that rotates while eccentrically revolving within a stator.

[0002]

2. Description of the Related Art Conventionally, as a variable gap type motor having an eccentric rotor, for example, there is one shown in FIGS. 9 and 10 disclosed in Japanese Patent Application No. 9-133266. FIG.
FIG. 10 is a longitudinal sectional view of the conventional variable gap type motor,
FIG. 10 is a transverse sectional view taken along line BB of FIG. 9. The variable gap motor 101 includes a stator 1 having a substantially cylindrical shape.
02, a rotor 104 having two rotor segments 103, 103 eccentric within the stator 102 and revolving while revolving, and transmitting only the rotation output by the rotation of the rotor segment 103 to the output shaft 105. Output transmission mechanism 1
And a motor housing 107 covering the stator 102, the rotor 103, and the output transmission mechanism 105. The stator 102 includes a salient pole core 108 and a yoke core 109 as shown in FIG. The salient pole portion core 108 is formed in a substantially cylindrical shape, and eight salient poles 110 are radially provided at equal intervals from the inside to the outside on the outer peripheral surface. Line 111
Is wound. Also, a plurality of stator small teeth 112 are provided continuously at equal intervals on the inner peripheral surface of the salient pole core 108, and two rotor segments 103 are rotatably disposed inside the stator small teeth 112. Have been. The rotor segment 10
Numeral 3 is formed in a disk shape, and its outer peripheral surface is formed with a plurality of rotor small teeth 113 meshing with the stator small teeth 112 at equal intervals. It is rotatably supported by a crankshaft 116.

The center hole 114 and the rotor teeth 11
3 and eight pin through holes 117 at equal intervals on the circumference.
Are drilled. The pin 118 having a smaller diameter than the pin through hole 117 is connected to the two rotor segments 103.
, And is fixed to the end plate 119 of the output transmission mechanism 106. This end plate portion 119
The output shaft 105 is provided on the motor housing 107 via the bearing 120 so as to be rotatable. In the conventional variable gap motor 101 having the above configuration, by sequentially exciting the salient poles 110 through the windings 111, the rotor segments 103 are fixed to the stator small teeth 1.
12, the small teeth 112, 113 are revolved eccentrically inside the stator 102 while meshing with each other, and the small teeth 112, 113 are engaged with each other. The rotation is made in accordance with the difference in the number of teeth, and a large torque due to this rotation can be efficiently and stably transmitted to the output shaft 105 to generate a large torque.

[0004]

However, in the above-described conventional variable gap motor 101, since the stator small teeth 112 and the rotor small teeth 113 directly mesh with each other, noise is generated or wear occurs. There is a possibility that the accuracy of the small teeth 112 and 113 may change with time. The material of the rotor segment 103 is preferably a material having a low hardness in consideration of magnetic characteristics. However, if this material is used, abrasion occurs between the pin 118 and the pin through hole 117, and the pin through hole 117 is used. Of the stator teeth 112 and the rotating small teeth 113 may not be meshed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a variable gap motor having an eccentric rotor with no small teeth of a stator and a rotor in order to solve the above-mentioned problems and prevent generation of noise. Another object of the present invention is to provide a variable gap motor having an eccentric rotator in which pins and pin through holes of an output transmission mechanism do not wear.

[0006]

In order to achieve the above object, according to one embodiment of the present invention, a plurality of m (m is a positive integer) salient poles project inward, and the salient poles are formed. Arranged at equal pitch angles in the circumferential direction, and a stator having windings wound around each of the salient poles, and supported rotatably about an axis eccentric from the center axis of the stator, A plurality n [n is n ≦ (m−1) or n] where the polarity alternates along the circumferential direction on the outer circumference.
A positive integer satisfying ≧ (m + 1)] permanent magnets.

In another aspect of the present invention, a plurality of m (m is a positive integer) salient poles are protruded inward, and the salient poles are arranged at equal pitch angles in a circumferential direction. And a stator having windings wound around each of the salient poles, and supported rotatably about an axis eccentric from the center axis of the stator, and polarities are alternately provided on the outer periphery thereof along the circumferential direction. N [n is n ≦
(Positive integer satisfying (m-1) or n ≧ (m + 1)) having a plurality of rotor segments provided with permanent magnets, and connected to the rotor to be rotatably disposed in the motor housing. And a power transmission mechanism for transmitting only the rotation output by the rotation of the rotor to the output shaft, wherein the output transmission mechanism is configured such that the output shaft is independent of the stator center shaft. The output shaft is provided with an end plate portion, and a pin having a circular cross section is provided parallel to the stator center axis at a position of the end plate portion away from the stator center axis by a predetermined radius. The plurality of rotor segments are rotatable on a crankshaft rotatably supported on a stator center axis, and the centers of the rotor segments are arranged at equal pitch angles at the same distance from the stator center axis. As well as the rotor A pin through hole having a center at a position substantially the same as the predetermined radius from the center of the hole is drilled with a diameter larger than the diameter of the pin, and the difference between the diameter of the pin through hole and the pin is determined by the rotor segment. Are formed substantially equal to the radial movement distance during the eccentric orbit.

In a further aspect of the present invention, a plurality of m (m is a positive integer) salient poles are protruded inward, and the salient poles are arranged at equal pitch angles in a circumferential direction. And a stator having windings wound around each of the salient poles, and supported rotatably about an axis eccentric from the center axis of the stator, and polarities are alternately provided on its outer periphery along the circumferential direction. N = n
(M-1) or a positive integer satisfying n ≧ (m + 1)], and a rotor segment having a plurality of rotor segments provided with permanent magnets, and rotatably disposed in the motor housing while being connected to the rotor. A variable transmission motor having an eccentric rotor provided with an output transmission mechanism for transmitting only the rotation output by the rotation of the rotor to the output shaft, wherein the output transmission mechanism has the output shaft fixed. An end plate portion is provided independently on the stator center axis, and the output shaft is provided with an end plate portion. The end plate portion has a circular cross section parallel to the stator center axis at a position away from the stator center axis by a predetermined radius. A pin is provided, the plurality of rotor segments are rotatable on a crankshaft rotatably supported on a stator center axis, and the center of each rotor segment is at the same distance from the stator center axis. At the same pitch angle A needle bearing having a center at a position substantially the same as the predetermined radius from the center of each of the rotor segments and receiving a pin with a diameter of a roller inscribed circle larger than the diameter of the pin is provided, The difference between the diameter of the needle bearing and the inscribed circle of the roller is substantially equal to the moving distance in the radial direction during the eccentric revolution of the rotor segment.

The rotor segments are rotatable about a crankshaft rotatably supported on a stator center axis, and the centers of the rotor segments are at the same distance from the stator center axis at equal pitch angles. A pin through hole having a center substantially at the same distance as the predetermined radius from the center of each of the rotor segments is drilled with a diameter larger than the diameter of the pin. The difference between the diameter of the rotor segment and that of the pin is substantially equal to the radial movement distance of the rotor segment during the eccentric revolution.

The rotor includes a plurality of rotor segments having the same shape, and is disposed on a crankshaft via bearings so as to be rotatable independently of each other. The center axis of each rotor segment is the revolving center axis. By arranging them on the crankshaft at the same distance and at the same pitch angle with respect to the (stator center axis), the rotor segments as a whole are mechanically balanced. The number of the rotor segments is not limited to two, but is three.
It may be more than one. Regarding the method of extracting the rotation output of the variable gap type motor, a pin extending parallel to the output shaft from that position at a position separated by a predetermined radius from the axis of the output shaft (fixed central axis) is attached to the output shaft. Each rotor segment is fixed to the formed end plate portion, and each rotor segment is provided with a pin through hole larger than the pin diameter at a position away from the center (rotation center) by the predetermined radius. Through the pin. The difference between the diameter of the pin and the diameter of the pin through hole is substantially equal to the radial movement distance (ie, twice the eccentric distance of the crankshaft) in the center axis of the rotor segment during the eccentric revolution. ing.
At this time, when the rotor segment eccentrically revolves inside the stator, the pin rotates while abutting on the inner peripheral surface of a pin through hole provided in the rotor segment, and each of the pins rotates through the pin. The rotational output of the child segment is transmitted to the output shaft.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of a variable gap motor having an eccentric rotor according to the present invention, and FIG. 2 is a transverse sectional view taken along line AA of FIG. In these figures, the variable gap type motor 1 includes a substantially cylindrical stator 2 and a plurality of stators 2 that revolve while revolving in an eccentric state (in this embodiment, two stators are used). ), An output transmission mechanism 6 for transmitting only a rotation output by the rotation of the rotor 4 to an output shaft 5, a stator 2, a rotor 4 and an output transmission mechanism. And a motor housing 7 for housing the motor housing 6 therein. The stator 2 is a hollow cylindrical member formed by laminating silicon steel sheets, and a plurality m (m is a positive integer) arranged at equal pitch angles.
In this embodiment, six (6) salient poles P1 to P6 protrude from the outside toward the inside, and the salient poles P1 to P6 extend in the circumferential direction inside to form a substantially cylindrical circumferential surface 8. doing. A winding 9 is wound around each of the salient poles P1 to P6, and the stator 2 and the winding 9 are molded with an insulating material 10 such as a mold.

In the stator 2, as shown in FIG.
Two disk-shaped rotor segments 3 that revolve while revolving are arranged on a crankshaft 11 via bearings 12. Here, the rotor 4 is composed of a plurality of (two in the present embodiment) rotor segments 3, and each rotor segment 3 includes one rotor segment main body 13 and a plurality of permanent magnets M. (In this embodiment, four of M1 to M4
). The rotor segment main body 13 is a disk-shaped body whose inside is hollowed out, and is provided with eight pin through holes 14 at equal pitch angles in the circumferential direction. In addition, the above 2
The outer diameter of the rotor segments 3, 3 is formed to be smaller than the diameter of the inner peripheral surface of the stator 2, and a plurality of n (n ≦ (m−1); m, n
Are positive integers) permanent magnets M. In FIG. 3, the permanent magnet M divides one cylindrical permanent magnet into approximately four equal parts, and the polarity of each permanent magnet M alternates in the circumferential direction on the outer peripheral surface of the rotor segment body 13. It is arranged as follows. For example, the permanent magnet M1 has a polarity on the outer circumference side of N and a polarity on the inner circumference side, and the adjacent permanent magnet M2 has a polarity on the outer circumference side of S and a polarity on the inner circumference side of N. Has become. Further, the two rotor segments 3, 3 are arranged on the crankshaft 11 in such a manner that permanent magnets M having different polarities face each other.

The pin through hole 14 has a center H at a position away from the center RC (rotation axis) of the rotor segment 3 by a radius R.
C, the diameter of which is larger than that of the pins 15, and a plurality (eight in the present embodiment, the same number as the pins 15) are provided at equal pitch angles. The diameter of the pin through hole 14 is such that the difference between the diameter of the through hole 14 and the diameter of the pin 15 is substantially equal to the radial movement distance S of the rotor 4. Then, the two rotor segments 3 are connected to the crankshaft 11.
And the pin 15 is inserted through the pin through hole 14 in a state where the pin through holes 14 are overlapped with each other. In this way, only the rotation output by the rotation of the rotor segment 3 can be transmitted to the output shaft 5 via the pin 15 irrespective of the revolution of the rotor segment 3.

As shown in FIG. 4, the crankshaft 11 has a first shaft 17 and a second shaft 18 integrally formed on a cylindrical crankshaft main body 16. The crankshaft main body 1
6 has a radius r about the stator center axis SC.
And the cross-sectional shapes of the first shaft 17 and the second shaft 18 are
Radius (r + △) centered on rotor center axes RC and R′C
L) circle. These two central axes RC, R'C are:
The eccentric distance ΔL is away from the stator center axis SC in the opposite direction, and bearings 19 and 12 are provided on the outer peripheral surfaces of the first shaft 17 and the second shaft 18, respectively. One end of the crankshaft 11 is provided via a bearing 21 attached to a housing end plate 20, and the other end is provided via a bearing 23 attached to an end plate 22 of the output transmission mechanism 6. It is supported rotatably about the stator center axis SC. On the other hand, the output transmission mechanism 6 is a mechanism for transmitting only the rotation output by the rotation of the rotor segment 3 to the output shaft 5, and includes a disk-shaped end plate portion 22 and the end plate portion 22.
, A pin 15 fixed to the flange 24 in parallel with the output shaft 5, and an output projecting from the center of the end plate 22 in a direction opposite to the flange 24. And a shaft 5. The output shaft 5 of the output transmission mechanism 6 is supported in the motor housing 7 via a bearing 25 so as to be rotatable about a stator center axis SC. A plurality (eight in this embodiment) of circular cross-section parallel to the stator center axis SC is provided on the flange part 24 of the end plate part 22 separated by a predetermined radius R from the stator center axis SC.
Are fixed at an equal pitch angle. FIG.
Next, a cross-sectional view of another embodiment of the variable gap type motor according to the present invention is shown. In this figure, the number of salient poles of the stator 2 is six, and the permanent magnet M
Are eight. Therefore, the relationship between the number m of salient poles and the number n of permanent magnets is n ≧ (m + 1).

Next, the operation of the variable gap motor having the above configuration will be described below. FIG. 7 and FIG.
FIG. 3 is a diagram showing a change in rotation of the rotor 4 when exciting while changing the salient poles P1 to P6 of the stator 2 sequentially from the state of FIG. The motor 1 in the present embodiment is
The case where the number of permanent magnets M provided on the rotor 4 is four in a configuration having six phases is shown. First, assuming that the A-phase (salient pole P1) is excited to the S-pole, as shown in FIG. 7, one rotor segment 3 has its permanent magnet M1 attracted toward the A-phase salient pole P1. On the other hand, the other rotor segment 3
Since the opposite permanent magnet M has the opposite polarity to that of the one rotor segment 3, the permanent magnet M7 is attracted toward the opposite A-phase salient pole P4. That is, the two rotor segments 3 and 3 are attracted in the opposite directions by excitation, and the inner peripheral surface of the pin through hole 14 holds the pin 15. Next, when the excitation of the A-phase (salient pole P1) is turned off and the B-phase (salient pole P2) is excited to become the N pole, one of the rotor segments 3 has its permanent magnet M2 having the B-phase salient pole P2. And rotated counterclockwise by an angle α1 as shown in FIG.
On the other hand, the other rotor segment 3 has its permanent magnet M8 attracted toward the reverse B-phase salient pole P5, and the angle α1
Only rotate counterclockwise. As a result, the pin 1
5 rotates counterclockwise by an angle θ1 (α1 <θ1). Further, when the excitation of the B-phase is cut off and the C-phase (salient pole P3) is excited to the S-pole, the one rotor segment 3 has its permanent magnet M3 attracted to the C-phase salient pole P3, as shown in FIG. Is further rotated by an angle .theta.1 (total angle .theta.2 = 2.times..theta.1). The other rotor segment 3 has its permanent magnet M5 attracted to the opposite C-phase salient pole P6, and further has an angle θ1.
(Total angle θ2 = 2 × θ1) and rotate counterclockwise. For this reason, the rotation of the pin 15 can efficiently transmit a large rotation torque due to the rotation of the rotor 4 to the output shaft 5 of the output transmission mechanism 6.

Note that the technology of the present invention is not limited to the technology in the above-described embodiment, but may be implemented by means of another mode that performs the same function. Various changes and additions are possible. For example, as shown in FIG. 5, a needle bearing 26 may be provided in the pin through hole 14 of the rotor segment 3. As a result, the rotor segment 3 rotates, and the pin 1
Since the sliding resistance at the time of contact with the pin 5 is reduced, the wear of the pin through-hole 14 and the pin 15 is reduced, and the life can be extended.

[0017]

As is apparent from the above description, the variable gap motor having the eccentric rotor according to the present invention has a plurality of m (m is a positive integer) salient poles projecting inward. The salient poles are arranged at equal pitch angles in the circumferential direction, and
A stator having windings wound around each of the salient poles, and supported rotatably about an axis eccentric from a central axis of the stator,
A plurality of n whose polarity alternates along the circumferential direction on the outer circumference
[N is a positive integer satisfying n ≦ (m−1) or n ≧ (m + 1)] and a rotor having a plurality of rotor segments provided with permanent magnets. Noise can be prevented by eliminating small teeth. Further, a strong radial suction force generated by the salient poles of the stator can be converted into a rotation output to generate a strong torque. Further, in the variable gap motor having the eccentric rotor according to the present invention, a plurality of m (m is a positive integer) salient poles are protruded inward, and the salient poles are arranged at an equal pitch angle in a circumferential direction. Arranged for each
And a stator having windings wound around each of the salient poles, and supported rotatably about an axis eccentric from the center axis of the stator, and the polarity of the outer periphery thereof alternates along the circumferential direction. A rotor having a plurality of rotor segments each provided with a plurality of n [n is a positive integer satisfying n ≦ (m−1) or n ≧ (m + 1)], and a motor connected to the rotor. A variable gap type motor having an eccentric rotor having a power transmission mechanism that is rotatably disposed in the housing and transmits only the rotation output by the rotation of the rotor to the output shaft, wherein the output transmission mechanism includes: The output shaft is independently disposed on the stator center axis, the output shaft is provided with an end plate portion, and the end plate portion is provided at a position away from the stator center axis by a predetermined radius. A plurality of rotor segments are provided in parallel with The rotatable crankshaft rotatably supported on the stator center axis, and the center of each rotor segment is disposed at the same distance from the stator center axis at equal pitch angles, and A pin through hole having a center at a position substantially the same as the predetermined radius from the center of each rotor segment is formed with a diameter larger than the diameter of the pin, and the difference between the diameter of the pin through hole and the diameter of the pin is: Since the rotor segment is formed so as to be almost equal to the radial movement distance at the time of eccentric revolution of the rotor segment, it is necessary to convert a strong radial suction force by the salient poles of the stator into a rotational output to generate a strong torque. By arranging a plurality of rotors at equal pitch angles, good balance can be maintained.

In the variable gap motor having the eccentric rotor according to the present invention, a plurality of m (m is a positive integer) salient poles project inward, and the salient poles are arranged at equal pitches in the circumferential direction. A stator is provided at each corner, and a winding is wound around each of the salient poles. The stator is rotatably supported around an axis eccentric from the center axis of the stator, and the outer periphery has a polarity around the stator. A plurality n [n that alternates along the direction is n ≦ (m−1) or n ≧
A positive integer that satisfies (m + 1)) and a rotor segment having a plurality of rotor segments provided with permanent magnets, and a rotor segment connected to the rotor and rotatably disposed in the motor housing;
A variable transmission motor having an eccentric rotor having an output transmission mechanism for transmitting only a rotation output by the rotation of the rotor to the output shaft, wherein the output transmission mechanism has an output shaft that is the center axis of the stator. The output shaft is provided independently with an end plate portion, and a pin having a circular cross section is provided at a position of the end plate portion away from the stator center axis by a predetermined radius in parallel with the stator center axis. The plurality of rotor segments are rotatable on a crankshaft rotatably supported on a stator center axis, and the center of each rotor segment is equidistant from the stator center axis at the same pitch angle. And has a center at a position substantially the same as the predetermined radius from the center of each of the rotor segments, and receives a pin with a diameter of a roller inscribed circle larger than the diameter of the pin. Needle bearing provided The diameter difference between the pin and the roller inscribed circle of the needle bearing is substantially equal to the radial movement distance during the eccentric revolution of the rotor segment, so that the sliding resistance between the pin and the needle bearing is reduced. As a result, wear of the needle bearings and the pins is prolonged, and a large torque with high reliability can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a variable gap motor according to the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is a plan view of a rotor segment according to the present invention.

4 (a) is a side view and FIG. 4 (b) is a front view of the crankshaft according to the present invention.

FIG. 5 is a cross-sectional view showing another embodiment of the variable gap motor according to the present invention.

FIG. 6 is a cross-sectional view showing still another embodiment of the variable gap motor according to the present invention.

7 is a cross-sectional view corresponding to FIG. 2, showing a state in which salient poles of phase A are excited.

8 is a cross-sectional view corresponding to FIG. 2 and shows a state in which salient B-phase poles are excited.

FIG. 9 is a longitudinal sectional view of a conventional variable gap motor having an eccentric rotor.

FIG. 10 is a cross-sectional view taken along line BB of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Variable gap type motor 2 Stator 3 Rotor segment 4 Rotor 5 Output shaft 6 Output transmission mechanism 7 Motor housing 8 Circumferential surface 9 Winding 10 Insulation material 11 Crankshaft 12,19,21,23,25 Bearing 13 rotation Child segment body 14 Pin through hole 15 Pin 16 Crankshaft body 17 First shaft 18 Second shaft 20 Housing end plate 22 End plate 24 Flange 26 Needle bearing 27 Roller inscribed circle P1 to P6 Salient pole M1 to M16 Permanent Magnet HC Pin through hole center PC pin center RC Rotor center axis (rotation axis) SC Stator center axis (revolution axis) ΔL Eccentric distance

Claims (3)

[Claims] 1. A plurality m (m is a positive integer) toward the inside
A plurality of salient poles are projected, the salient poles are arranged at equal pitch angles in the circumferential direction, and a stator in which a winding is wound around each of the salient poles, and a center axis of the stator. A plurality n [n is n ≦ (m−1) or n ≧ (m +), which is rotatably supported about an eccentric shaft and whose polarity changes alternately along the circumferential direction on the outer periphery thereof.
1) a rotor having a plurality of rotor segments provided with permanent magnets, and sequentially exciting the salient poles through the windings and sequentially attracting the permanent magnets. A variable gap motor having an eccentric rotor, wherein the rotor is configured to rotate by the difference between the number of salient poles and the number of permanent magnets while eccentrically revolving within the stator. 2. A plurality m (m is a positive integer) toward the inside
A plurality of salient poles are projected, the salient poles are arranged at equal pitch angles in the circumferential direction, and a stator in which a winding is wound around each of the salient poles, and a center axis of the stator. A plurality n [n is n ≦ (m−1) or n ≧ (m +), which is rotatably supported about an eccentric shaft and whose polarity changes alternately along the circumferential direction on the outer periphery thereof.
A positive integer that satisfies 1), a rotor having a plurality of rotor segments provided with permanent magnets, and a rotor connected to the rotor and rotatably disposed in a motor housing, and rotating by rotation of the rotor. A variable gap motor having an eccentric rotor having an output transmission mechanism for transmitting only output to an output shaft, wherein the output transmission mechanism has an output shaft independently disposed on the stator central axis. An end plate portion is provided on the output shaft, and a pin having a circular cross section is provided at a position of the end plate portion away from the stator center axis by a predetermined radius in parallel with the stator center axis; The segments are rotatably mounted on a crankshaft rotatably supported on a stator center axis, and the centers of the rotor segments are arranged at the same distance from the stator center axis at equal pitch angles. , Each rotor segment A pin through hole having a center substantially at the same distance from the center of the pin as the predetermined radius is formed with a diameter larger than the diameter of the pin, and the difference between the diameter of the pin through hole and the diameter of the pin is determined by the rotor segment. The radially moving distance at the time of the eccentric revolving is formed to be approximately equal to, and the salient poles are sequentially excited through the windings, and the permanent magnets are sequentially attracted, so that the rotor is moved inside the stator. While rotating eccentrically, it is rotated by the difference between the number of salient poles and the number of permanent magnets, and only the rotation output by the rotation of the rotor segment is transmitted to the output shaft via the pin inserted through the pin through hole. A variable gap motor having an eccentric rotor. 3. A plurality m (m is a positive integer) toward the inside
A plurality of salient poles are projected, the salient poles are arranged at equal pitch angles in the circumferential direction, and a stator in which a winding is wound around each of the salient poles, and a center axis of the stator. A plurality n [n is n ≦ (m−1) or n ≧ (m +), which is rotatably supported about an eccentric shaft and whose polarity changes alternately along the circumferential direction on the outer periphery thereof.
A positive integer that satisfies 1), a rotor having a plurality of rotor segments provided with permanent magnets, and rotatably disposed in the motor housing in a state of being connected to the rotor. A variable gap type motor having an eccentric rotor having an output transmission mechanism for transmitting only rotation output to an output shaft, wherein the output transmission mechanism has an output shaft independently disposed on the stator central axis. An end plate portion is provided on the output shaft, and a pin having a circular cross section is provided parallel to the stator center axis at a position of the end plate portion away from the stator center axis by a predetermined radius. The stator segments are rotatably mounted on a crankshaft rotatably supported on a stator center axis, and the centers of the respective rotor segments are arranged at the same distance from the stator center axis at equal pitch angles. With each of the above rotors A needle bearing having a center substantially at the same distance from the center of the segment as the predetermined radius and receiving the pin with a diameter of a roller inscribed circle larger than the diameter of the pin; The difference in diameter from the tangent circle is formed so as to be substantially equal to the moving distance in the radial direction at the time of eccentric revolution of the rotor segment, and sequentially excites the salient poles through the windings and sequentially turns the permanent magnets By suction, the rotor is eccentrically revolved in the stator, is rotated by the difference between the number of salient poles and the number of permanent magnets, and only the rotation output by the rotation of the rotor segment is output via the pin to the output shaft. A variable gap motor having an eccentric rotor.