JPS6223249Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a terminal block for a rotating electric machine.

A conventional terminal block for a rotating electrical machine will be explained with reference to FIGS. 1, 2, and 3. A terminal block 1 of a rotating electrical machine is made of resin and has terminal screws 5 that connect internal leads 6 from a stator winding 9 inside the rotating electrical machine.
and a portion 1a that has an external terminal screw 2 located outside the rotating electrical machine and to which the power lead 3 is connected.
is attached to a plate-shaped L-shaped terminal 4 which is fixed across parts 1a and 1b of the terminal block.
In the terminal block 1, a portion 1b having a terminal screw 5 is inserted into a notch 8a provided in a part of an outer frame 8 of a rotating electric machine as shown in FIG. The terminal block 1 is inserted so that the fitting protrusions 1d provided at two locations on both side surfaces 1c of the terminal block portion 1b having the terminal block 5 fit into the two notch grooves 8b provided in the notch portion 8a. . Fitting protrusion 1d
The notch grooves 8b and 8b are formed so as to fit tightly together, and are configured so that the terminal block 1 will not easily come off after the terminal block 1 is attached to the outer frame 8. Note that the lid 7 is placed over the terminal block 1 of the rotating electric machine, and the lid 7 and the terminal block 1 are connected to each other by the same screw 11 at the slots 7a and 1e, respectively. It is tightened into the screw hole 8c of the outer frame 8.

When the user of the rotating electric machine connects the power lead 3, he or she removes the screw 11, removes the cover 7, and connects the power lead 3 to the external terminal screw 2 of the terminal block 1 of the rotating electric machine.
After connecting, the lid 7 and the terminal block 1 are tightened again with the screws 11.

As mentioned above, when the lid 7 is removed, the terminal block 1 of the rotating electric machine is supported only by the frictional force between the fitting protrusion 1d and the notch groove 8b. There is a tight fit. However, when the terminal block 1 of a rotating electric machine is removed several times during disassembly and reassembly, since the terminal block 1 is made of resin, the fitting between the fitting protrusion 1d and the notch groove 8b becomes loose, and the terminal The stand 1 may easily come off from the outer frame 8. In addition, since the internal leads 6 are longer than the required minimum dimension because they are connected before the terminal block 1 is inserted into the outer frame 8, they may sag during manufacturing of the rotating electric machine and may be connected to, for example, the blades 10 of the rotor. It is housed in a narrow gap between the outer frame 8 of the rotating electric machine and the stator winding end 9 to prevent the stator winding end 9 from being damaged. However, when the terminal block 1 of the rotating electric machine slips out of the outer frame 8 due to loose fitting during disassembly and reassembly, the internal leads 6 follow the terminal block 1 and come out from the gap, causing the terminal block to become loose again. Even if the base 1 is inserted into the outer frame 8, the internal leads 6 may become slack.

In view of the above points, the present invention is a terminal for a rotating electric machine that can prevent the terminal block from slipping out of the outer frame even if the fitting protrusion of the terminal block and the notch groove of the outer frame become loosely fitted. This is an attempt to provide a platform.

Hereinafter, the present invention will be explained based on FIGS. 4 to 7. FIG. 4 shows a terminal block according to the present invention, in which retaining protrusions 1f protrude outward in the circumferential direction of the outer frame on both sides of the portion 1b of the terminal block 1 located inside the outer frame 8 of the rotating electric machine. It is characterized by the provision of. Other than having this protrusion 1f,
It is exactly the same as before. The setting position of the projection 1f is offset from the fitting projection 1b in the outer frame axis direction, and furthermore, the setting position of the projection 1f is offset in the vertical direction from the fitting projection 1b.
The upper surface of the protrusion 1f is located below the lower surface of the protrusion 1f. Further, the protrusion 1f is
Its width is set to a size that allows insertion into the notch groove 8b of the outer frame 8 of the rotating electric machine. That is, the distance between the end surfaces of both protrusions 1f is larger than the width in the circumferential direction of the notch 8a in the outer frame 8 of the rotating electric machine, and smaller than the width between both ends of the notched grooves 8b, 8b in the circumferential direction. It is set like this.

Therefore, in order to attach the terminal block 1 of the rotating electrical machine to the outer frame 8 of the rotating electrical machine, first the retaining protrusion 1f is
Insert the terminal block 1 until it is inserted into the outer frame 8 through the notch groove 8b of the outer frame 8 (FIG. 5). On this occasion,
The terminal block 1 can only be inserted into the notch 8a until the fitting protrusion 1d contacts the outer surface of the outer frame 8, but the retaining protrusion 1 can be inserted from the lower surface of the fitting protrusion 1d.
Since the top surface of f is at the bottom, the retaining protrusion 1f
can be placed completely within the outer frame. (The vertical distance between the lower surface of the fitting protrusion 1d and the upper surface of the retaining protrusion 1f is such that when the lower surface of the mating protrusion 1d touches the outer surface of the outer frame 8, the upper surface of the retaining protrusion 1f is completely connected to the outer frame 8. (This is the minimum size that is sufficient to fit inside the outer frame 8.) Next, as shown in FIG.
Move it in the direction of the arrow in Figure 5 until it reaches the position. After that, the terminal block 1 is further inserted into the notch 8a of the outer frame 8.
(See arrow in Figure 6). FIG. 7 is a diagram showing a state in which the terminal block 1 is completely attached to the outer frame 8.

Since the terminal block of the rotating electrical machine of the present invention is constructed as described above, even if the fitting of the fitting protrusion 1d becomes loose due to repeated disassembly and assembly, the retaining protrusion 1f
Since the terminal block 1 is prevented from coming out of the outer frame 8 by hitting the inner surface of the outer frame 8 of the rotating electrical machine, the internal leads 6 will not be pulled out and will not sag inside the rotating electrical machine. .

Note that the terminal block 1 can be removed until the top surface of the retaining protrusion 1f is on the inner surface of the outer frame 8, but this dimension is such that the inner lead 6 is in the lead storage area between the outer frame 8 and the stator winding end 9. Needless to say, the settings are set to such an extent that it will not slip out.

As described above, according to the present invention, the plate-shaped terminal electrically connects the internal lead of the stator winding disposed inside the outer frame of a rotating electric machine and the power supply lead disposed outside the outer frame. and a terminal block that is attached to cover a notch provided in the outer frame of the rotating electric machine,
Notch grooves are formed in the outer frame on both sides of the notch in the circumferential direction, and the terminal block is provided with protrusions that can be tightly fitted into the notch grooves when the terminal block is installed, and further below the protrusions on the terminal block. is provided with a retaining protrusion that protrudes outward in the circumferential direction of the outer frame and can be inserted into the notch groove by being deviated from the protrusion in the axial direction of the outer frame. Even if the fitting with the groove becomes loose, it is possible to prevent the terminal block from slipping out of the outer frame, prevent the internal leads from sagging, and have the effect of significantly improving safety and reliability. In addition, with this invention, it is only necessary to provide retaining protrusions on both sides of the lower part of the conventional terminal block, which does not require major design changes, maintains economic efficiency, and allows the power lead to be drawn into the terminal block as in the conventional terminal block. There is no need to provide a hole, and the terminal block can be positioned and mounted simply by fitting its protrusion into a notch provided in the outer frame of the rotating electric machine, so there is also the effect of good workability.

[Brief explanation of the drawing]

Figure 1 is a partial sectional view of a rotating electrical machine equipped with a conventional terminal block, Figure 2 is an exploded perspective view of the terminal block and lid of a conventional rotating electrical machine, and Figure 3 is a perspective view of the outer frame of the rotating electrical machine. , FIG. 4 is a perspective view of the terminal block of the rotating electrical machine of the present invention, and FIGS. 5, 6, and 7 are explanatory views showing the procedure for attaching the terminal block of the rotating electrical machine of the present invention to the outer frame, respectively. It is. In the figure, 1 is a terminal block of a rotating electric machine, 1d is a fitting protrusion, 1f is a retaining protrusion, 3 is a power lead, 4 is an L-shaped terminal (plate terminal), 6 is an internal lead, 7 is a lid, and 8 8a is a notch, 8b is a notch groove, and 9 is a stator winding. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] It has a plate-shaped terminal that electrically connects the internal lead of the stator winding arranged inside the outer frame of the rotating electrical machine and the power supply lead arranged outside the outer frame, and the terminal is attached to the outer frame of the rotating electrical machine. The terminal block is provided with a terminal block that is mounted over the provided notch, and the outer frame has cutout grooves formed on both sides of the notch in the circumferential direction, and can be tightly fitted into the notch groove when the terminal block is mounted. Further, below the protrusion on the terminal block, a retaining protrusion is provided, which is offset from the protrusion in the axial direction of the outer frame and protrudes outward in the circumferential direction of the outer frame so that it can be inserted into the notch groove. A terminal block for a rotating electrical machine characterized by the following: