JP2587258Y2 - Terminal block - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block, and more particularly, to a terminal block having conductive terminals on both sides of a terminal block main body and having airtightness for connecting an external conductor for supplying power to a motor conductor. Related to terminal block.

[0002]

2. Description of the Related Art Conventionally, this type of terminal block is formed by integrally molding one or a plurality of terminals penetrating a terminal block body made of a synthetic resin as an electrical insulator. And the terminal has a connection part of a conductor at both ends,
It serves to connect the conductors on both sides of the terminal block.

FIGS. 6 and 7 show a conventional terminal block.
Is a side view having a partial cross section of the terminal block, and FIG. 7 is a plan view of FIG. A plurality of terminals 12 are integrally formed on a terminal block main body 11 made of a synthetic resin. The terminal 12 includes a square anti-rotation portion 12a for preventing the terminal from rotating with respect to the terminal block body 11, seats 12b, 12b for fixing the conductive wires on both sides of the anti-rotation portion 12a, and these seats 12b, 12b
And male screws 12c, 12c extending outward from. The conductor male screw 12c which is provided to the terminal tip, by tightening the nut-shaped female screw to 12c, is fixed between the internal thread and the seat 12 b.

[0004]

However, even if an external force such as torque is applied to the terminal when the female screw is tightened to fix the lead wire, the terminal block does not slip between the terminal block body and the sealing property. It is necessary that there is no obstacle to the operation. Further, a seat for fixing must be provided under the male screw in order to securely fix the conductor. For this reason, as shown in FIG. 6, a specially shaped terminal 12 is required, and the specially shaped terminal needs to be manufactured by machining, so that the terminal block must be expensive as a whole. .

The present invention has been made in view of the above circumstances, and has as its object to provide a terminal block which is manufactured at low cost by forming terminals using commercially available bolts and nuts.

[0006]

In order to achieve the above-mentioned object, the terminal block of the present invention has conductive terminals on both sides of the terminal block main body, and connects an external conductor for supplying power to a motor conductor. In the airtight terminal block, the conductor terminal is constituted by double screw bolts having nuts which are prevented from rotating at both ends, and the conductor terminal is formed integrally with the terminal block main body made of an insulator, and the nut is formed. Are embedded in the terminal block main body.

[0007]

According to the present invention having the above-described structure, a terminal is formed by screwing a nut into both ends of both screw bolts and then using an incompletely screwed portion or by stopping the terminal by bonding or the like.
The terminal can be formed integrally with the terminal block main body from an insulator to form a terminal block.

[0008]

FIG. 1 shows an embodiment of a terminal block according to the present invention.
This will be described with reference to FIG. FIG. 1 is a side view having a partial cross section of the terminal block, and FIG. 2 is a plan view of FIG. Terminal block 1
Is formed by embedding a plurality of terminals 4 formed by screwing a pair of nuts 3 and 3 into both screw bolts 2 into a base or a terminal block main body 5 made of an insulating material. When screwing the pair of nuts 3 and 3 into the two screw bolts 2, the nuts 3 and 3 are completely screwed up to the incompletely threaded portions of the two screw bolts 2, and the nuts 3 and 3 are not loosened into the two screw bolts 2. They are fixed together.

The upper part of the nut 3 slightly protrudes from the terminal base body 5 made of an insulating material, and the upper surface 3a of the nut 3 functions as a conductive wire fixing seat. The nut 3 has a hexagonal surface, and a part of the hexagonal surface is embedded in the terminal block main body 5, so that the terminal 4 is prevented from rotating with respect to the terminal block main body 5. Therefore, even when the nut for fixing the conductor is tightened or loosened, the terminal 4 does not run idle in the terminal block main body 5 and a sufficient sealing property can be secured.

FIGS. 3 and 4 show another embodiment of the terminal block of the present invention. In this embodiment, the pair of nuts 3 and 3 are not screwed up to the incompletely threaded portions of the two screw bolts 2. Instead of bolt 2, nut 3,
After screwing and positioning 3, nuts 3 and 3 are bonded,
The bolt 2 is fixed so as not to be loosened by welding or caulking. Other configurations are the same as those of the embodiment shown in FIGS.

FIG. 5 is a sectional view showing an installed state of the terminal block constructed as shown in FIGS. In FIG.
Reference numeral 21 denotes a pump casing, in which an impeller 22 is housed, and the impeller 22 is fixed to and supported by the main shaft 31. An intermediate casing 33 is connected to an upper portion of the casing 21, and a submersible motor is installed above the intermediate casing 33.

The underwater motor includes a stator core 29, a stator coil 36, and a rotor core 30 installed in a motor frame 28. The rotor core 30 is integrally fixed to the main shaft 31. The main shaft 31 is rotatably supported by an upper bearing 32 and a lower bearing 37.

On the outer periphery of the motor frame 28,
A water cooling jacket 25 is provided, and the water cooling jacket 27 and the motor frame 28 form a water cooling chamber 27. A water cooling pipe 2 is provided in the water cooling jacket 25.
The cooling water discharged from the impeller 22 is guided from the intermediate casing 33 to the water cooling chamber 27.

An anti-load side bracket 35 is provided above the underwater motor, and the terminal block 1 shown in FIGS. 1 to 4 is fixed to the anti- load side bracket 35.
One side of the terminal 2 of the terminal block 1 has a stator coil 3
Conductor L _i 6 is fixed by a nut 38, the other side of the terminal 2 lead L _o of the external power supply is secured by a nut 39.

[0015]

[Effects of the Invention] As described above, according to the present invention,
Since the terminal is not formed in a special shape, the terminal can be configured using commercially available bolts and nuts, and a low-cost terminal block with excellent productivity can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view, partially in section, showing one embodiment of a terminal block according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view, partially in section, showing another embodiment of the terminal block according to the present invention.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a cross-sectional view illustrating an installation state of the terminal block according to the present invention.

FIG. 6 is a side view having a partial cross section showing a conventional terminal block.

FIG. 7 is a plan view of FIG. 6;

[Description of Signs] 1 Terminal block 2 Double screw bolt 3 Nut 4 Terminal 5 Terminal block body

Claims (1)

(57) [Scope of request for utility model registration] A terminal block having conductive terminals on both sides of a terminal block main body and having an airtightness for connecting an external conductor supplying power and a conductor of a motor. A terminal block comprising a double screw bolt having a set nut, the conductor terminal being integrally formed with the terminal block main body made of an insulator, and a part of the nut being embedded in the terminal block main body. .