JPS5893447A - Terminal box for motor of pump - Google Patents

Abstract

PURPOSE:To improve the draining of a terminal box and to reduce the number of the mounting members of the box by forming a slope which becomes deeper toward both ends on the bottom of the case of the box and forming a drain hole at the bottom of the deepest part. CONSTITUTION:Electric parts such as a terminal which connects a power source, a condenser 11, etc. are container in a case 1, and covers 2, 3 are coated on the case 1. A slope which becomes gradually deeper from the center 6 toward both ends is formed on the bottom 4 of the case 1, and water drain holes 50 which communicates with the exterior are formed at both sides of the case 1 at the deepest part. A plurality of projections 51 are formed parallel to the upper end face 60 of the case 1 so as to support the electric parts such as the condenser 11 and the like in the case 1. Legs 32 provided integrally with the bottom 4 of the case 1 are contacted with the housing of a motor 5, and the case 1 is mounted on the housing of the motor 5 via mounting brackets 31.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a terminal box that is mounted on the housing of a pump motor, and particularly to a terminal box that allows water to drain well inside the terminal box and that allows the motor to function without wasting space. Regarding a terminal box that can be installed in a terminal box.

A terminal box for a pump motor consists of a case that houses wiring members such as middle terminals for connecting electric wires to each other and electrical components such as capacitors, and a cover that covers the upper open end of the case. A terminal box attached to a motor of a pump that uses water is often splashed with water, and water tends to enter the box, so a hole for draining water has conventionally been provided at the bottom of the case.

However, since the bottom of the case of this conventional terminal box is a horizontal surface, it is difficult to completely drain water that has entered the box. Therefore, the inside of the box will always be humid, and internal parts may corrode and cause poor contact, or electrical leakage may occur due to poor insulation of internal parts.
Workers may get an electric shock when switching terminals, etc.
This is not desirable for safety reasons. Furthermore, it is difficult to directly mount a conventional terminal box having a horizontal bottom onto the rounded housing of a pump motor, and a mounting member for the box must be interposed between the terminal box and the motor.

Therefore, installing this attachment member requires a lot of wasted space, which inconveniently increases the space occupied by the pump as a whole.

The present invention was made in consideration of the actual situation of the terminal box of the pump motor for health and well-being. Our goal is to provide a terminal box that can be installed on any motor.

That is, in the present invention, the bottom of the terminal case is sloped so that the depth gradually increases from the center to both ends, and a drain hole is provided at the bottom of the case at the deepest point. Since the water that has entered the box can be easily drained and the degree of inclination matches the outer diameter of the motor housing, the mounting member interposed in the terminal box can be very small and will not take up any wasted space. It comes out.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A terminal box for a pump motor according to the present invention will be explained below based on the drawings. FIG. 1 is a plan view of the pump motor terminal box with the cover open, showing one embodiment of the present invention, and FIG. 2 is a plan view of the terminal box of the pump motor shown in FIG. FIG. 3 is a front sectional view of the terminal box, and FIG. 3 is a perspective view of FIG. 2. In the figure, 1 is a case of the terminal box, and inside the case 1, female terminals 12. Male terminal 13. Relay terminal 14. Electrical components such as a switching terminal 15 and a capacitor 11 are housed therein.

2.3 is a cover that covers the case 1'', and is an integrally molded synthetic resin product that is connected to the case 1 and the cover 2' by a screw. 4 is the bottom of the case 1, and the center part 6 has a cover on both ends. The case 1 is sloped so that it gradually becomes deeper toward the top. It is set according to the outer diameter of the housing of the motor 5. Reference numeral 50 is a water drain hole provided at both ends of the case 1 and communicating with the outside.
These are protrusions provided parallel to the upper end surface 60 of the case 1 to support and place internal components such as 1, etc., and in this embodiment, a plurality of protrusions are provided in the shape of ribs. Reference numeral 32 denotes a leg provided integrally with the case 1 at the bottom 4 of the case 1, and the terminal box is attached so that the leg 32 comes into contact with the housing of the motor 5.

31 is a mounting bracket for mounting the terminal box to the housing of the motor 5; 29 is a screw for mounting the mounting bracket 31 to the housing of the motor 5; 30 is a screw for mounting the mounting bracket 31 to the case 1 of the terminal box. It is. In the terminal box having such a structure, even if water enters the box, the water will pass through between the rib-like protrusions 51 that support the internal parts, and then fall to the bottom 4 of the case 1. The water droplets move to the deepest parts of both ends of the case 1 according to the inclination, and are well discharged to the outside from the drain holes 50 provided there. Also, since the degree of inclination of the bottom 4 of the case 1 is matched to the roundness of the housing of the motor 5, the terminal box has legs 32 provided on the bottom 4 that touch the housing of the motor 5, and occupies a very small space. It is well fixed to the housing of the motor 5 by the mounting bracket 31.

As mentioned above, the terminal box for a pump motor of the present invention allows water that has entered the box to drain out well, thereby preventing corrosion of electrical parts such as terminals, and improving electrical safety. There is an effect that can be done. Further, since only a small member is required for attaching the terminal box to the motor housing, the space occupied by the pump as a whole can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a terminal box of a pump motor according to an embodiment of the present invention, and Fig. 2 is a front cross-sectional view of the terminal box shown in Figs. The figure is a perspective view of FIG. 2. 1... Case, 2, 3... Cover, 4... Bottom,
5...Motor, 6...Central part, 29.30...Screw, 31...Mounting bracket, 32...Legs, 50...Drain hole, 51...Protrusion, 60 ...Top surface. 1st dormitory 20

Claims (1)

[Scope of Claims] 1. A terminal box that is mounted on the housing of a pump motor, which is comprised of a case that houses connection terminals for electric wires and other electrical parts, and a cover that covers the upper open end of the case. , the bottom of the case is sloped so that the depth gradually increases from the center to both ends, and in accordance with the outer diameter of the housing of the motor, and the bottom of the deepest part of the case has an external surface; A pump motor terminal box characterized by being provided with a communicating drain hole. 2. The pump motor according to claim 1, wherein a protruding portion for placing the electrical component inside the case is provided parallel to an upper end surface of the case. terminal box.