JP2591115Y2 - Capacitor and capacitor induction motor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitor induction motor and a capacitor to be externally mounted on the motor, and more particularly to a capacitor mounting structure.

[0002]

2. Description of the Related Art In an input circuit of a capacitor induction type motor, a phase-advancing capacitor is arranged in series with an auxiliary winding in order to obtain a two-phase rotating magnetic field of the motor. Installed outside the case. FIG. 6 shows the mounting structure. In the figure, a screw hole 22a is formed on the outer periphery of a motor case 22 of a capacitor induction motor 21 and a screw 22b is formed.
As a result, the capacitor mounting bracket 23 is
It is fixed to 2. The shape of the metal fitting 23 for mounting the capacitor is a rectangular resin case 24 containing the capacitor body.
Corresponding to the shape of the capacitor mounting bracket 23,
The rectangular resin case 24 is fixed to the inside thereof while being held.

[0003]

However, the conventional mounting structure has the following problems since it is mounted using the capacitor mounting bracket 23.

[0004] A capacitor mounting bracket 23 and a screw 22b are required. Since the shape of the capacitor mounting bracket 23 corresponds to the shape of the rectangular resin case 24, a special type is required for each size of the rectangular resin case 24. Things are needed. Further, it is necessary to tap a screw hole 22a on the outer periphery of the motor case 22. Further, in the assembly process of the capacitor induction type motor 21, a man-hour for screwing the capacitor mounting bracket 23 is required. Is not preferred.

In view of the above problems, an object of the present invention is to provide a capacitor and a capacitor induction type motor which can be easily mounted on a motor case without increasing the number of parts by providing a hook portion on the capacitor case. Is to do.

[0006]

Means for Solving the Problems In order to solve such a problem, in a capacitor to be externally attached to a capacitor induction type motor, the means adopted by the present invention is a state in which an exterior is provided or a state in which no exterior is provided. At least one pair of hooks facing inward each other are integrally formed on the bottom side of the capacitor case, and one of the hooks
Has a wide hook width and a corner angle exceeding 180 °
The other hook has a narrow hook width,
It is characterized by having a pawl .

In this case, it is desirable that the other hook is formed at a position substantially opposite to one end of one hook in order to suppress rattling in an externally attached state.
In order to prevent the other hook from being displaced in the externally attached state, it is preferable that a ridge substantially parallel to the one hook is formed inside the base of the other hook.

A capacitor induction motor to which a capacitor having such a configuration is externally attached is formed corresponding to the hooks described above, and has a hooked portion to be hooked by these hooks outside the motor case. Features.

Here, the motor case has at least two motor case members having a plurality of seats protruding toward the outer peripheral side, and these motor case members are fixed to these seats. When the members are connected directly or with other motor case members sandwiched therebetween, the shaft portions of these fixing members may be used as the above-mentioned hooked portions.

[0010]

With the capacitor according to the present invention, the capacitor body is sealed with resin in the capacitor case, and a pair of hooks on the bottom side of the capacitor case is used for the capacitor induction type motor without using other parts. Installed outside the motor case. In addition, if the capacitor body can be stored in the capacitor case, it can be easily attached to the capacitor induction motor regardless of its size and shape. Regardless of the shape, the capacitor case can be externally attached to the capacitor induction motor. In addition, since the size and shape of the capacitor body are not directly related to the mounting structure, a hook mechanism having a structure considering only the mounting strength or the efficiency of the mounting operation can be adopted as the mounting structure.

[0011] Then , a modified hook is adopted as a hook. One hook has a wide hook width and a wrap angle of more than 180 °, and the other hook has a narrow hook width, and the hook has a narrow inside width. Since the hook has a hook, one capacitor is pivoted around the hook while the other hook is pivotally supported by the hook to be hooked, so that the other hook corresponds to the hook. When the hook is pressed against the hooked portion, the hook has a small width and thus has elasticity. Therefore, the hook is spread by the hooked portion and easily hooked and hooked. In addition, one hook has a wide hooking width, so that it is difficult to rattle, and the other hook has a hooking claw, so that it does not easily slip out, so that a stable mounting structure is obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a capacitor induction motor according to an embodiment of the present invention will be described with reference to FIG.

FIG. 1 is an exploded perspective view of a capacitor induction motor to which a phase-advancing capacitor is externally attached, and shows a body of a motor case and a structure of a phase-advancing capacitor.

In FIG. 1, reference numeral 1 denotes a capacitor induction type motor, 2 denotes a body portion of the motor case, and 7 denotes a phase advance capacitor having a square resin case as a capacitor case.

The body of the motor case 2 includes a first motor case member 3, a yoke 4, and a second motor case member 5.
The second motor case member 5 is further connected with, for example, a pump case (not shown). here,
On the outer periphery of the first motor case member 3, the second motor case member 5 and four fixing screws 6a, 6b, 6c are attached.
The four screw seats 3a, 3b, 3c for fixing by means of are formed so as to protrude to the outer peripheral side, and screw holes 3a ', 3b', 3c 'are opened in them, and a screw groove is formed inside. Is formed. Also, on the outer periphery of the second motor case member 5, four screw seats 5 for fixing the same to the first motor case member 3 with four fixing screws 6a, 6b, 6c are provided.
a, 5b, 5c are formed so as to protrude to the outer peripheral side, and threaded holes 5a ', 5b', 5c 'are formed in them. Further, on the outer periphery of the second motor case member 5, four screw seats 5d for connecting the pump cover are provided.
5e, 5f, and 5g are also formed, and screw holes 5d ', 5e', 5f ', and 5g' are also formed therein.

With the first motor case member 3 and the second motor case member 5 having this configuration, the yoke 4 is sandwiched between the first motor case member 3 and the second motor case member 5, and the 3.68φ fixing screws 6a, 6b, 6c are provided.
Are screw holes 5 of each screw seat of the second motor case member 5.
a ', 5b', 5c ', and are screwed into screw holes 3a', 3b ', 3c' of each screw seat of the first motor case member 3, and the first motor case member 3 and the yoke are screwed. 4th and 2nd
Is connected to the motor case member 5. In addition, the shafts of the fixing screws 6a, 6b, 6c are threaded only on the tip end side, and the shafts 6a ', 6 on the screw head side.
b 'and 6c' are not threaded, and as described later, the unthreaded shaft portion 6b 'of the fixing screw 6b.
The hook 1 of the square resin case 8 of the capacitor 7 for phase advance
1 is hooked. Note that the first and second
A magnetic path is formed in the yoke 4 between the motor case members 3 and 5 while the motor 1 is operating.

On the other hand, the phase-advancing capacitor 7 mounted on the outside of the capacitor-induction motor 1 of this configuration has a capacitor body 7a in a rectangular resin case 8 (condenser case) made of propylene carbonate with a resin 8 '. Faston terminals 9 a, 9 b, 9 c, 9 d, 9 e, which are electrodes, protrude from the opening 8 a of the resin case 8.

Here, the structure of the phase advance capacitor 7 will be described with reference to FIGS.

FIG. 2 is a front view of the phase advance capacitor 7, and FIG. 3 is a bottom view thereof.

As shown in these figures, on the bottom surface of the rectangular resin case 8 of the capacitor 7, one side surface 8b
A first hook 10 having a wide hooking width from the side of the opening 8a to the side of the back surface 8c is formed on the side of the first hook 10 near the opening 8a on the opposing side surface 8d. A second hook 11 having a narrow hook width facing one end is formed. Furthermore, inside the base of the second hook 11,
The first hook 10 is provided with a semicircular rib 12 (projection) having a radius of 3 mm, which is arranged from the side of the opening 8a to the side of the back surface 8c. here,
The lengths of the first hook 10 and the rib 12 are equal, and they are equal in length to the width of the yoke 4 in FIG. Further, the inside of the first hook 10 is a semicircular hooking surface 10a having a diameter equivalent to the diameter of the fixing screw 6a, and is approximately 195 with respect to the outer periphery of the fixing screw 6a. It can be hooked with a wrap angle of °.

On the other hand, since the second hook 11 has a short hook width, the second hook 11 has elasticity, and has a hook claw 11a that bends at a radius of curvature of 0.5 mm at the tip side. Here, the distance between the hooks 10 and 11 corresponds to the distance between the fixing screws 6a and 6b of the first and second motor case members 3 and 5, and the hooks 10 and 11 are respectively hooked to the fixing screws 6a and 6b. 10 and 11 can be hooked. Further, a shallow groove 8e is formed on the side surface 8b so that the upper surface of the first motor case member 3 and the upper surface of the second motor case member 5 do not interfere with the bottom surface of the rectangular resin case 8. Are formed.

The rectangular resin case 8 has an opening 8a having a larger area than the rear surface 8c.

Here, the mounting structure of the motor case 2 of the capacitor induction type motor 1 and the phase advance capacitor 7 will be described with reference to FIGS.

FIG. 4 is a process sectional view showing a part of the work of attaching the phase advance capacitor 7 to the motor case 2, and FIG. 5 is a process sectional view after the work is completed. 3 shows a mounting structure with a phase capacitor 7.

First, the fixing screw 6a of the motor case 2
The hook surface 10 of the first hook 10 of the rectangular resin case 8
a and align the first hook 1 with the fixing screw 6a.
0 shallow. Here, from the state where it is hooked shallowly,
When the phase-advancing capacitor 7 is swung in the direction of arrow A with the fixing screw 6a as a rotation center, the fixing screw 6a and the first hook 10 are in a deeply fitted state, and The capacitor 7 can swing about the fixing screw 6a as a center of rotation. From this state, the phase advance capacitor 7 is further turned over in the direction of arrow A, and the second hook 11 is pushed toward the fixing screw 6b with the fixing screw 6a as a fulcrum. The second hook 11 is pushed outward and the fixing screw 6b enters inside. As a result, the second hook 11 is hooked on the fixing screw 6b due to the restoring force of the second hook 11 and the hook claw 11a bent at the tip of the hook 11, so that the motor case 2 is locked. Is mounted with a phase advance capacitor 7. The ribs 12 of the square resin case 8
Is located between the screw seat 3b of the first motor case member 3 and the screw seat 5b of the second motor case member 5, so that the second hook 11 does not move on the fixing screw 6b and moves forward. The phase capacitor 7 does not shift. Thereafter, wiring is provided from each terminal of the phase advance capacitor 7 to the inside of the motor 1.

As described above, in the present embodiment, the first and second hooks 10, 11
A rectangular resin case 8 having
0 and 11, the capacitor is externally attached to the capacitor induction motor 1. Therefore, even when a capacitor body whose size is reduced and its cost is reduced or a capacitor body whose size is large in terms of characteristics is used, a square resin case is used. If it can be stored in 8, it can be attached externally. Further, if the formation positions and shapes of the hooks 10 and 11 of the square resin case 8 are common, square resin cases having different sizes and shapes can be externally attached. Here, the capacitor body 7
a. Since the shape and size of the square resin case 8 do not directly affect the mounting structure, the hooks 10 and 11 in consideration of only the mounting strength, that is, the hook 10 having a large hooking width and a large corner angle can be used. The phase-advancing capacitor 7 does not cause backlash and the hook 11
Has the hooking claws 11a, so that the phase advance capacitor 7 does not slip out. Also, the second hook 11
Is hooked diagonally with the edge of the first hook 10, so that the phase advance capacitor 7 is stable. In addition, since heat is hardly transmitted to the phase advance capacitor 7, the characteristics of the phase advance capacitor 7 hardly change. Furthermore, with the first hook 10 pivotally supported by the fixing screw 6a, the second hook 11 is positioned on the fixing screw 6b and is easily hooked simply by tilting the phase advance capacitor 7. So
The installation work is easy and efficient. Fixing screws 6 a, 6 for connecting the first and second motor case members 3, 5 as hooked portions to the hooks 10, 11.
Since b is used, it is not necessary to add a new member to realize this mounting structure. Furthermore, since the phase-advancing capacitor 7 is attached to the upper surface of the motor case 2 using the curved surface of the motor case 2, the height of the capacitor induction motor 1 is suppressed to a minimum.

Here, as the capacitor body 7a to be resin-sealed inside the rectangular resin case 8, even if a capacitor previously housed in an exterior resin, a metal case, or a resin case is used, a capacitor having no exterior is applied. May be used. That is, the capacitor storage case itself may be a capacitor case having a hook.

The mounting position of the capacitor may be any position such as the upper surface or the side surface of the motor case.

[0029]

As described above, according to the invention] In the present invention, in a state where the capacitor body were sealed with a resin in a capacitor case having a pair of hooks on the bottom side, an external shall in capacitor induction motor, of one The hook is wide
With a wrap angle of more than 180 ° and the other hook
Has a narrow hook width and has a hook claw inside its tip
It is characterized by the following. Therefore, the following effects are obtained.

With one of the hooks pivotally supported by the hook, the capacitor can be swung about this hook as the center of rotation, and the other hook can be pressed against the corresponding hook by hooking. Therefore, the efficiency of the mounting work is high. Also,
One of the hooks has a large width, so that no rattling occurs, and the other hook has a hooking claw, so that slippage does not occur. Therefore, the mounting is easy and the stability is good.

[0031]  The other hook is one end of one hook
If it is formed at a position almost facingOrThe other
The inside of the base of the hook is almost flat with one hook.
If a ridge that runs is formed,
Stability is better because rattling and displacement are less likely to occur.
Be improved.

[0032]  Motors in capacitor induction motors
The fixing member for connecting the case members is
It is not necessary to provide a new hook
No.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a body of a motor case used in a capacitor induction motor according to an embodiment of the present invention and a structure of a phase advance capacitor.

FIG. 2 is a front view of the phase advance capacitor of FIG. 1;

FIG. 3 is a bottom view of the phase advance capacitor of FIG. 1;

FIG. 4 is a process cross-sectional view showing a part of the work of attaching the phase advance capacitor to the motor case of FIG. 1;

5 is a process sectional view showing the mounting structure of the phase advance capacitor after the mounting operation of FIG. 4 is completed.

FIG. 6 is a perspective view showing a conventional mounting structure of a phase advance capacitor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Capacitor induction type motor 2 ... Motor case 3, 5 ... Case member 6a, 6b ... Fixing screw (fixing member, hooked part) 7 ... Phase-advancing capacitor 8 ... Square resin case (condenser case) 10,11 ... Hook 12 ... Rib (protrusion)

Claims (5)

(57) [Scope of request for utility model registration] 1. A capacitor to be externally attached to a capacitor induction motor, comprising: a capacitor case in which a capacitor body is resin-sealed; at least a pair of hooks facing inward each other are integrally formed on the bottom side of the capacitor case. And one of the hooks is hooked
Wide, with a wrap angle of more than 180 ° and the other
A capacitor , wherein the hook has a small hook width and has a hook claw inside the tip . 2. The method according to claim 1 , wherein the other hook is
A capacitor formed at a position substantially facing one end of the one hook. 3. An apparatus according to claim 1 or claim 2, the base portion inside the other hook, and said to one of the hooks, is ridge substantially parallel are formed capacitor. 4. The motor case according to claim 1, wherein the hooks are formed corresponding to the hooks of the capacitor case of the capacitor as defined in any one of claims 1 to 3 , and these hooks are to be hooked on the motor case. A capacitor induction type motor, which is provided outside. 5. The motor case according to claim 4 , wherein
It has at least two motor case members having a plurality of seats protruding toward the outer peripheral side, and these motor case members are directly or other motor case members by fixing members fixed to those seats. And a shaft portion of these fixing members is used as the hooked portion.