JPH07107643A - Power source box - Google Patents

Abstract

PURPOSE:To protect a terminal against deformation by a structure wherein a part bulging from the tip of terminal claw part is hooked at the through hole part when a flat connecting terminal is drawn out from the male tab part of the terminal and serves as a stopper for preventing removal of the claw part from the case. CONSTITUTION:The power source joint box comprises a resin case 12 and a cover and houses wirings equipped with a plurality of terminals 17 having a plurality of male tab parts. The terminal 17 is provided, at the tip of fixing part thereof, with a bulging claw part 18 for alignment which narrower than a bulging part 22 at the tip of terminal claw part of the case 12. A through hole for fixing the terminal wider than the bulging part 22 is made at the position where the insertion of the claw part 18 is completed. The bulging part 22 is press fitted into the through hole 20 so that the bulging part 22 is hooked at a narrow part of the through hole 20 when the insertion is completed. The insertion system employing the combination of the terminals 17 enhances the workability significantly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply box for accommodating electric parts and wirings, and more particularly to the shape of an electric part accommodating portion of a case.

[0002]

2. Description of the Related Art A power supply box used in a conventional pump is, as described in Japanese Patent Laid-Open No. 57-131887, a method of connecting electric parts in a power supply box for accommodating wirings.
The round connection terminal was fixed with a screw, and the mail tab of the terminal was used only for connecting the power supply wire.

Wiring work using a tool such as a screwdriver has been performed in screwing for connecting electrical parts. However, there is poor continuity due to insufficient tightening of screws, loosening of screws due to vibration during transportation, or poor continuity. However, due to insufficient conduction, contact resistance causes heat generation, and in the worst case, there is a problem of safety such as smoking and ignition. Also, in the mail tab part for connecting the power supply wire of the terminal, since the binding force between the flat connection terminal of the power supply wire and the mail tab is strong, it is a terminal when pulling out the flat connection terminal from the mail tab when replacing the power supply wire. Since it is necessary to prevent the deformation, the structure is complicated, such as screwing the terminal to the case, and the workability is poor and the cost is high.

Further, since the single-phase pump and the three-phase pump have different electrical parts, it is wasteful to prepare a power supply box for each of them in terms of parts procurement and parts management.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a conventional method for binding electrical parts of such a pump, and a modification of terminals.
It was made in view of the actual situation of preparing different power supply boxes for single-phase pumps and three-phase pumps, and the purpose is to determine the wiring method of electrical components in the power supply box.
Improve the reliability of the binding state by combining the mail tab and the flat connection terminal with insulation pod, or the flat connection terminal separately, and prevent the deformation of the terminal when removing the flat connection terminal from the mail tab when maintaining electrical parts. In addition, the power supply box for the single-phase pump and the three-phase pump should be shared.

[0006]

In order to achieve the above object, the features of the present invention, and wirings having a plurality of terminals having a plurality of mail tab portions, which are composed of a resin case and a cover, are housed. In the power supply box, the terminal mounting portion is provided with an alignment claw portion having a bulge at the tip, and the case is made narrower than the bulge at the tip of the terminal claw portion, and at the position where the claw portion is completely inserted. , A through hole for fixing the terminal that is wider than the bulge at the tip of the terminal claw is provided, and the bulge at the tip of the terminal claw is press-fitted into the through-hole of the case. The structure is such that the bulge is caught in the narrow portion of the through hole.

Further, in the power supply box for storing the wirings, the storage portion for storing the condenser required when using the single-phase pump of the power supply box is a three-phase pump required when using the three-phase pump. The electric motor overload protection device can be housed, and a hook portion for fixing the electric motor overload protection device is provided.

[0008]

[Operation] When replacing the electrical parts of the pump, the bulge at the tip of the terminal claw penetrates the boss of the power supply box even when the flat connection terminal with the insulation pod or the flat connection terminal is pulled out from the mail tab of the terminal. Since the hole catches and acts as a stopper, the terminal claws will not come off the case and the terminal will not be deformed.

Since the case and the cover are shared by the single-phase pump and the three-phase pump, it is not necessary to prepare a case and a cover for each.

Further, even when the power supply box is used for a three-phase pump, since the stopper portion and the arm-shaped hook portion which are integrated with the case are provided, the electric motor overload protection device may be displaced or fall out. There is no. Further, even when the relay is fixed, since it is fixed by the claw portion integrated with the power supply box, there is no need to use screws or other parts.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

1 and 2 show a pump 7 including a pressure tank 1, a motor 2, a casing 3, a casing cover 4, a separation chamber 5, a power supply box 6, a pressure switch 8 and the like.
Is.

FIG. 3 shows a pump 7 according to an embodiment of the present invention.
1 is a single-phase power supply box 11 used for a single-phase pump, in which a capacitor 9 and a motor overload protection device 10 when used in a single-phase pump are housed. Further, FIG. 4 shows a power supply box 35 used for a three-phase pump. The flame-retardant resin case 12 (hereinafter referred to as the case) and the flame-retardant resin cover 13 (hereinafter referred to as the cover) are the same parts as those for the single phase, and include the motor overload protection device 14 and the relay 15
It consists of.

In this power supply box, as shown in FIGS. 5 and 6, a plurality of terminals 17 having a plurality of mail tabs 16 for wiring the pressure switch 8 provided in the pump 7, the motor 2 and the like. Is provided.

The terminal 17 has a positioning claw portion 18 for fixing it to a predetermined position of the case 12, and its tip is used for inserting the terminal claw portion of the case 12 as shown in FIGS. As shown in FIGS. 7 and 8, the undercut step portion 21 of the through holes 20a and 20b of the boss portions 19a and 19b of the case 12 is inserted so as not to easily come off after being inserted into the boss portion 19.
It has a bulge portion 22 so as to be caught on. The dimension b of the bulge portion 22 at the tip of the claw portion 18 of the terminal 17 is shown in FIG.
As described above, the width dimension x of the claw portion 18 is 1.1 times or more and 1.5 times or less, that is, 1.1 ≦ b <1.5, and the through hole entrance dimension c of the case 12 is set to the bulge portion at the tip of the claw portion 18. 22 The width dimension is smaller than the width dimension b, that is, c <b, and the width dimension x of the claw portion 18 is equal to or larger than the width dimension d of the through hole 20 at the position when the insertion is completed. Since the width dimension is made larger than b, that is, b <d, when the flat connection terminal 24 with the insulating pod 36 connected to the mail tab portion 16 or the flat connection terminal 24 alone is pulled out,
As shown in FIG. 9, the bulge portion 22 (b dimension portion) at the tip of the terminal claw portion is caught in the undercut step portion 21 of the through hole 20 of the boss portion 19 of the case 12, so that the terminal 17 can be prevented from coming off or deforming. is there. Also, this power supply box 6
The inlet 23 for inserting the terminal claw of the case 12 is chamfered to 0.5 or more so that the claw 18 can be easily inserted.

In sharing the parts, as shown in FIG. 10, the case 12 of the power supply box 6 is accommodated in a place for accommodating the condenser 9 when the case 12 is used as a single-phase pump, as shown in FIG. When the pump is used, the three-phase pump electric motor overload protection device 14 is housed. However, in order to prevent the electric motor overload protection device 14 from being displaced or falling off during transport of the pump, a stopper integrated with the case 12 is provided. An arm-shaped hooking portion 26 is provided so that the portion 25 and the motor overload protection device 14 can be held down from above. Further, as shown in FIGS. 12 and 13, in order to fix the relay 15, the case 12 and the claw portions 28a and 28b which are integrated with the case 12 are provided at the positions located on both the left 27a and the right 27b of the relay 15. By fitting the relay 15 into the 28a and 28b, the relay 15 can be securely fixed to a predetermined portion of the case 12.

As described above, since the screws are not used when mounting the parts, the workability is very good.

As shown in FIGS. 3 and 4, in this pump power source box 6, the flat connecting terminal 2 is connected to the terminal 17.
A press screw portion 29 is provided so that terminals and lead wires other than 4 can be connected, and the press screw portion 29 is provided with a screw 30 for a terminal with a square washer. As shown in FIGS. 12 and 14, a rib 31 is provided integrally with the case 12 for preventing rotation of the terminal seat screw 30. Further, the rib 31 is provided with a case 12 which is provided so as to have strength so as to secure an insulating space distance between different poles and not to conduct even when the mail tab portion 16 further collapses. In order to connect to the integrated wall-shaped rib 32 and further increase the strength,
Ribs 34 are connected to the bag shape 33. It should be noted that the height of the ribs 34 is partially changed to f as shown in FIG. 14 so that the ribs 34 connected in a bag shape will not conduct electricity even if water enters the ribs 34, as shown in FIG.

In summary of the above description, according to the present invention, in the work of connecting the electric parts in the electric part case, the workability is improved because of the insertion method using the combination of the mail tab and the flat type connection terminal. Very good and reliable. Further, the terminals are not deformed even when the flat type connection terminal is pulled out from the mail tab portion when the electric parts are replaced. In addition, the case and cover, the terminals are commonly used for single-phase pumps, three-phase pumps, and the number of screws for fixing the components is reduced.

[0020]

According to the present invention, when connecting electric parts of a pump, since the insertion method is a combination of a mail tab and a flat connecting terminal, the workability is very good and the reliability is high. At this time, when removing the flat connection terminals of electrical parts from the mail tabs of the terminals housed in the power box, the terminals do not deform even if the binding force is strong. Since it is shared for the three-phase pump and for the three-phase pump, and it is not necessary to prepare a dedicated case and cover for each, it has good productivity and manageability. When used for the three-phase pump, the motor overload protection device is used. Since the relay is fixed to the case without using a screw, resources related to the screw can be saved and the assembly and disassembly are easy.

[Brief description of drawings]

FIG. 1 is a top view of a pump.

FIG. 2 is a front view of a pump.

FIG. 3 is a developed top view of a single-phase power supply box according to the present invention.

FIG. 4 is a developed top view of a three-phase power supply box according to the present invention.

FIG. 5 is a front view of a terminal having a mail tab portion.

FIG. 6 is a partial cross-sectional view when a flat-type connection terminal is inserted into a terminal having a mail tab portion.

FIG. 7 is a partial cross-sectional view in which a terminal having a mail tab portion is attached to a case and a flat connection terminal is inserted.

FIG. 8 is a partial cross-sectional view showing a fitting dimension of a boss portion of a case into which a terminal having a mail tab portion and a terminal claw portion are inserted.

FIG. 9 is a partial cross-sectional view in which a terminal having a mail tab portion is inserted into a boss through hole of a case.

FIG. 10 is a partial cross-sectional view in which a condenser is attached to the case.

FIG. 11 is a partial cross-sectional view in which a three-phase electric motor overload protection device is attached to a case.

FIG. 12 is a partial cross-sectional view of the relay mounting portion of the case.

FIG. 13 is a partial cross-sectional view in which a relay is attached to a relay fixing claw portion of a case.

FIG. 14 is a partial sectional view showing the rib height of the case.

[Explanation of symbols]

1 ... Pressure tank, 2 ... Motor, 3 ... Casing, 4 ...
Casing cover, 5 ... Separation chamber, 6 ... Pump power supply box, 7 ... Pump, 8 ... Pressure switch, 9 ... Capacitor, 10 ... Electric motor overload protection device, 11 ... Single-phase power supply box, 12 ... Flame-retardant resin Case, 13 ... Flame-retardant resin cover, 14 ... 3-phase motor overload protection device, 15 ...
Relay, 16 ... Terminal of mail tab, 17 ... Terminal, 18
... Terminal claws for aligning with case, 19 ...
Boss for inserting terminal claw of case, 20 ... Through hole of boss, 20a, 20b ... Boss, 21 ... Step of undercut of case, 22 ... Bulging part of terminal claw tip, 2
3 ... Entrance of boss through hole, 24 ... Flat connection terminal, 25
... stopper part for preventing positional deviation of the three-phase motor overload protection device of the case, 26 ... arm-like holding part, 27a ... left side of relay, 27b ... right side of relay, 28a ... left side of claw part for mounting relay, 28a ... Right side of the relay mounting claw, 2
9 ... Press screw part of terminal, 30 ... Screw for terminal with square seat, 3
DESCRIPTION OF SYMBOLS 1 ... Rib for preventing rotation of terminal seat screw, 32 ... Wall-shaped rib, 33 ... Bag-shaped portion surrounded by rib, 34 ... Rib for water escape lower than wall-shaped rib and rib for preventing rotation , 35 ...
Power supply box for three-phase pump, 36 ... Insulation pod for flat connection terminal.

Claims (2)

[Claims] 1. A power supply box for accommodating wiring, comprising a plurality of terminals having a plurality of mail tab portions, which is composed of a resin case and a cover, wherein a mounting portion of the terminals has a bulge at a tip thereof. The positioning claw is provided, and the case is made narrower than the bulge at the tip of the terminal claw, and at the position where the claw is completely inserted, the penetration for fixing the terminal is wider than the bulge at the tip of the terminal claw. A hole is provided, and the bulge portion at the tip of the terminal claw portion is press-fitted into the through hole of the case, and at the press-fitting completed position, the bulge at the tip of the terminal claw portion is caught in the narrow portion of the through hole. And power box. 2. In a power supply box for storing wirings, a storage portion for storing a condenser required when used in a single-phase pump of the power supply box is a three-phase required for use in a three-phase pump. A power supply box having a structure capable of accommodating an electric motor overload protection device for a pump and having a hooking portion for fixing the electric motor overload protection device.