JPH0588164U - Electric child - Google Patents

Abstract

(57) [Summary] [Purpose] The unbalanced balance amount of the parts held or engaged on the output shaft of the armature is corrected in advance, and thus the balance adjustment is omitted. [Structure] 1, 2, and 3 are laminated cores, and these laminated cores 1, 2, and 3 are laminated, and a coil B is wound to form a core portion A.
Is configured. The core portion A is fixed to the output shaft 5 rotatably supported by the pair of bearings 6 and 7, and the coil B
The core portion A is rotated by energizing the motor to form an armature. Reference numeral 4 denotes an eccentric object having a center of gravity in the upper part in FIG. 1 which is held on the opposite side of the core portion A with the bearing 6 interposed therebetween, and corresponds to the unbalanced balance amount of the armature. And
Holes 1a for balance adjustment in the three laminated cores 1, 2 and 3;
2a and 3a are displaced from the output shaft 5, and the rotary shaft 5
It is drilled along the direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an armature, which is a rotating body of a motor in which a plurality of cores are laminated and a coil is wound, and more particularly to balance adjustment of the armature.

[0002]

[Prior Art]

 Generally, this type of armature balance adjustment involves applying an external force to the armature to rotate the armature, measuring the unbalanced balance amount, and correcting the unbalanced balance amount. The balance of rotation was balanced by adding weights to or scraping the required cores.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional method, the unbalanced balance amount and its direction are determined in advance to some extent, and even if it is known, the rotational balance must be balanced by the above-mentioned method, so the adjustment work is complicated and time-consuming. Then, there was a drawback. In addition, it is extremely difficult to balance the rotational balance by incorporating an eccentric weight for balance adjustment on the output shaft of the armature after incorporating the armature into the motor, which causes an increase in cost and a reduction in performance. There was also such a problem.

Therefore, the present invention has been made in view of the above-mentioned conventional drawbacks or problems, and the purpose thereof is to balance the balance amount of the laminated core portion in advance so as to balance with the balance amount. Thus, the unbalanced balance amount of the parts held or engaged on the output shaft of the armature is corrected in advance, and thus the armature without the balance adjustment is provided.

[0005]

[Means for Solving the Problems]

 In order to achieve this object, an armature according to the present invention is an armature of a motor in which a plurality of cores are laminated and a coil is wound, and each of the cores has a position displaced from the center of rotation of the core. It has at least one hole formed along the direction of the rotation axis.

[0006]

[Action]

 According to the present invention, each of the laminated cores has a center of gravity at a position displaced from the center of rotation of the core, and the unbalanced balance amount is eliminated by selecting the position and weight of this center of gravity.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of an armature according to the present invention, and FIG. 2 is a side view of the same three cores. In these figures, reference numerals 1, 2 and 3 denote laminated cores, and these three laminated cores 1, 2 and 3 are each provided with a core groove 1b penetrating in the thickness direction. 1, 2, and 3 are laminated and a coil B is wound to form a core portion A. This core portion A is fixed to an output shaft 5 which is rotatably supported by a pair of bearings 6 and 7, and a stator made of a permanent magnet (not shown) is arranged in the vicinity of the core portion A, and a coil B When a current is applied to the core portion A, the core portion A rotates to form an armature, and the rotation is taken out from the output shaft 5.

Reference numeral 4 denotes an eccentric object having a center of gravity in the upper part in FIG. 1 held on the side opposite to the core portion A with the bearing 6 interposed therebetween, and corresponds to the unbalanced balance amount of the armature of the present embodiment. Is. The amount and direction of the unbalanced balance amount is measured by rotating the core portion A in advance with an external force. As shown in FIG. 2, the present invention is characterized in that three laminated cores 1, 2 and 3 are provided with balance adjusting holes 1a, 2a and 3a at positions displaced from the output shaft 5 and rotated. It is at a point drilled in the direction along the axis 5.

That is, in the core 1, the angle θ from the X axis is₁ Direction, that is, the hole 1a in the Y-axis direction, the core 2 forms an angle θ from the X-axis.₂ Direction 2a, and the core 3 has an angle θ from the X axis. ₃ Holes 3a are formed in each direction. By forming these holes 1a, 2a and 3a, the core 1 is located below the output shaft 5 in FIG. The center of gravity is off. The three cores 1, 2, 3 and the eccentric 4 are separated from the bearing 6 by a distance l.₁ , L₂, L₃And l_Four Have a distance of.

FIG. 3 schematically shows the three cores 1, 2, 3 and the eccentric 4, and FIG. 3A is a vector diagram showing a balance state in the rotational direction, and FIG. It is a vector diagram showing a balance state in the axial direction. If W _n = weight and r _n = balance amount, then F _n is expressed by equation (1). Here, in order to balance the balance in the rotational direction, equation (2) should be satisfied.

[0011]

[Equation 1]

[0012]

[Equation 2]

Further, if the distance from the bearing 6 to the cores 1, 2, 3 and the eccentric is l _n , the equation (3) should be satisfied in order to balance the balance in the axial direction.

[0014]

[Equation 3]

Therefore, by measuring the weight and the position of the center of gravity of the eccentric object 4 in advance as an unbalanced balance amount, the cores 1, 2, and 3 are By calculating the core width and the sizes and positions of the holes 1a, 2a, 3a by calculation, it is possible to eliminate the unbalanced balance amount and balance the rotational balance of the armature, and after assembling the motor of the armature. It is possible to omit the balance adjustment process. Further, regarding the imbalance of the winding amount of the coil B, it is possible to balance the imbalance by determining the starting position of the winding in advance. In addition, in the present embodiment, the holes 1a, 2a, and 3a provided by being provided in the cores 1, 2, and 3 are provided one by one, but the present invention is not limited to this, and a plurality of holes may be provided, and the size of Of course, you may change.

[0016]

[Effect of the device]

 As described above, according to the present invention, each of the stacked cores is provided with at least one hole formed along the rotation axis direction at a position displaced from the center of rotation of the core, and the position of the hole is defined. By appropriately selecting the number and size, the unbalanced balance amount can be eliminated and the rotational balance of the armature can be balanced, and the balance adjustment process of the armature after the motor is assembled can be omitted or finely adjusted. Therefore, the number of assembling steps can be reduced. Moreover, since it is not necessary to add a weight for balance adjustment as in the conventional case, a defect due to the removal of the weight during rotation of the motor does not occur. Also, when fixing an output shaft having a center of gravity at a position eccentric from the center of the output shaft, it is possible to achieve balance by preliminarily making the core side unbalanced.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an armature according to the present invention.

FIG. 2 is a side view of each laminated core of the armature according to the present invention.

FIG. 3A is a vector diagram showing a rotationally balanced state of the armature according to the present invention, and FIG. 3B is a vector diagram similarly showing an axially balanced state.

[Explanation of symbols]

 1 Laminated core 2 Laminated core 3 Laminated core 4 Eccentric 5 Output shaft 6 Bearing 7 Bearing

Claims (1)

[Scope of utility model registration request] 1. An armature of a motor in which a plurality of cores are laminated and a coil is wound, and at least one of the cores is provided at a position deviated from the center of rotation of the cores along the rotation axis direction. An armature provided with one hole.