JPS5899254A - Stator fixing method of compact synchronous motor - Google Patents

Abstract

PURPOSE:To facilitate the setting of both stators to specified positions by a method wherein the projections provided on the periphery of the second stator are engaged with the notches provided on the end of side wall of the first stator to locate mutual positions and then the second stator is forced to fit to the first stator bending the projections. CONSTITUTION:Several notches 21 are provided on the end of side wall 1b of the first stator and opposing to these notches, several projections 22 are provided on the periphery of the second stator 2 cut from the side wall 2b and bottom plate 2 extending outward in parallel to the bottom plate 2. The second stator 2 is set to the first stator into specified positions by means of locating mutual positions of both stators 1, 2 with said projections 22 engaged with said notches 21. Next the second stator is forced to fit to the first stator until the former holds the exciting coil 4 to bend said projections 22 fixing both stators to each other. Through these procedures, both stators may be set to specified positions very easily.

Description

[Detailed description of the invention] The present invention relates to a method for fixing a stator of a small synchronous motor.

As an example of a small synchronous motor, one constructed as shown in FIG. 1 is known. That is, in the inner center of the first stator 1 which is cylindrical with a bottom, there is a second stator 1 which is cylindrical with a bottom.
A stator 2 is press-fitted 1, and a flat cover 3 is attached to the opening of the first stator 1. An annular excitation coil 4 is provided between the first and second stators 1.2 and is sandwiched between the first and twentieth stators 1.2. A permanent magnet rotor 5 is rotatably provided within the excitation coil 4' via a shaft 6.

(9) 50 rotations of the trochanter is caused by the second stator 2 and the force I
The signal is transmitted to the output shaft $ via a reduction gear mechanism 7 disposed between <-3.

By the way, when press-fitting and fixing the second stator 2 into the first stator 1, it is necessary to set the fixing mode in a predetermined manner, so conventionally, a press-fitting device as shown in FIG. 2 is used. .

To explain this, the fixed jig 11 and the movable jig &12
It consists of

The fixing jig 1117C is provided with protrusions 14 corresponding to holes 13 provided at a plurality of predetermined locations on the bottom plate 11 of the first stator 1. On the other hand, the movable jig 12 is provided with rods 16 that are movable up and down and correspond to holes 15 provided at a plurality of predetermined locations in the bottom plate 2 & of the second stator 2. is spring 17
is urged downward by. Further, a permanent magnet 18 is provided at a predetermined location below the movable fighting tool 12. When press-fitting and fixing the 20th stator 2 into the first stator 1, the first fixing is performed by first engaging the protrusions 14 of the fixing jig 11 around the hole 13 of the first stator 1. The child 1 is set in the fixed jig 111/c in a predetermined manner. In addition, the hole 1s of the stator 2 of the Kz is engaged with the movable jig izoot 16, and the bottom plate 2 of the second stator 2 is inserted to prevent it from falling.
By attracting & to the permanent magnet 18, the second stator 2 is set in the movable jig 12 in a predetermined manner. Next, the movable jig 12 is lowered, whereby the second stator 2 is press-fitted into the first stator 1 until the excitation coil 4 is clamped therebetween, and thus the second identifier 2 is inserted into the first stator 1. Press-fit and fix into the stator l of. In addition, in the press-fitting step, when the rod 16 comes into contact with the am''i ear 4, the rod 16 thereafter moves up relatively against the force of the spring 17.

However, in any conventional press-fitting fixing method, the plate thickness of the 20th stator l is 0. The length of the protrusions and protrusions 14 of the fixing jig 11 can only be approximately α8 brocade, and therefore the hole 1 of the 20th stator l is quite thin.
This has the disadvantage that it is difficult to engage the tenth stator 3 with the protrusion 14 of the fixing jig 11, and it is also difficult to set the tenth stator l in a predetermined manner with respect to the fixing jig 11. In addition, when setting the second stator 2 on the movable jig &2, it is necessary to engage the plurality of holes 15 of the second stator 2 with the rods 16 from below. The disadvantage was that it was quite troublesome. Furthermore, due to the above-mentioned drawbacks, it is difficult to automate such press-fitting and fixing work. Furthermore, there was a drawback that the configurations of the facing fixing jig All and the movable jig 12 were complicated and the cost was high.

The present invention was made in view of the above circumstances &Cf1I, and
, a stator fixing method for a small-wave synchronous motor that allows the second stator to be extremely easily set in a predetermined manner, that can also be automated, and that is further enhanced by simplifying the configuration of the compressor. The purpose is to provide

Hereinafter, a cold embodiment of the present invention will be described with reference to FIGS. In this embodiment, parts with the same names as those in the conventional example described above are given the same reference numerals, and some explanations thereof will be omitted. There is no movable jig 1.
2 does not have any conventional permanent magnets such as q-rad and spring. Instead, as shown in FIG. 4, a plurality of (two or more) notches A are provided in the bottom portion of the 10th stator 10 side 111bF), and a second notch A is provided corresponding to these notches s21. As shown in FIG. 1, the outer periphery of the stator 2 is provided with a protrusion 22 which extends outward in parallel with the bottom plate 2a by cutting out the side ll2k and the bottom plate 21.

Therefore, when press-fitting and fixing the second stator 2 into the first stator l, first the tenth stator l is simply set in a predetermined position in the fixing jig 11C), and then the notch of this L4Dliil stator 1 is By engaging the protrusion s22 of the second stator 20 with the portion 21 and positioning the stators 1.2 relative to each other, the second stator 2 is placed on the stator 1 in a predetermined manner. set. Next, the movable jig 12 is lowered, thereby press-fitting and fixing the second electron 2 into the first stator 1. In addition, in the press-fitting process, the protrusion 22 of the second stator 2 is inserted into the l1l of the first stator 1, as shown in FIGS. 6 and 7.
It is bent due to contact with llilb and inside the side wall -1bO-
Therefore, even if the protrusion 22 initially protrudes outward from the side wall 1b of the first stator 1, no problem will arise.

As explained above, according to the method for fixing a stator for a small Sakura pipe motor according to the present invention, the protrusion provided at the outer part of the second stator is inserted into the notch provided at the end of the side wall of the first stator. The inner stators are engaged to position each other, and then the second stator is press-fitted into the first stator, and the protrusions are bent accordingly. Since the internal stator is located within the side wall, it is extremely easy to set the internal stator in a predetermined manner, and automation is also possible since it is only necessary to set the trv stator on the first stator. Furthermore, there is no need to provide the press-fitting jig with anything for positioning the internal stators relative to each other, and therefore the structure of the press-fitting jig is simplified and its cost can be reduced.

[Brief explanation of drawings]

Atsushi Figure 1 is a vertical cross-sectional view showing an example of a small synchronous motor, Figure 2
The figure is a vertical side view shown to explain the conventional stator fixing method, Figure '3 is a vertical side view shown to explain one embodiment of the method of the present invention, and Figure 4 is a side view of the first stator. Figure K5 is a perspective view showing a part of the second stator, and Figures 6 and 7 are diagrams shown to explain the bending of the protrusion of the second stator. be. 1...first stator, 2...i...second stator, 4...excitation coil, 5. curved permanent magnet rotor, 1
1. Fixed jig, 12. Movable jig, 21. Curved notch, 22. Protrusion. Figure 2 Figure 3 Figure 4 Figure 6! J5 Figure 7

Claims (1)

[Claims] ゛The permanent magnet rotor and the permanent magnet rotor No. 10, which has a cylindrical shape with a bottom, house the excitation coil that is arranged on the first day.
When press-fitting and fixing the bottomed cylindrical second stator that presses the excitation coil into the stator, a plurality of notches are provided at the end of the wall of the first stator OII, and the notches are made to correspond to the notches S. A protrusion extending outward in parallel with the bottom plate is provided in the outer circumferential portion of the zO stator by cutting out its side wall, and the protrusion is red-colored in the cutout, and the first,
The second stators are mutually positioned, and then the second stator is press-fitted into the first stator. A method for fixing the stator of a small synchronous motor in which the mold is located within the side wall of the stator.