JPS6022782Y2 - rotating electrical machine terminals - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a terminal in a terminal box of a rotating electric machine, particularly a small electric motor.

As shown in FIG. 7, the conventional terminal of this type has an internal lead wire 1 drawn out from the winding end by a terminal screw 21 screwed into one end of a terminal fitting 20 embedded in a terminal block 19.
A terminal screw 8 for connecting a lead wire from an external power source was screwed into the other end of the terminal fitting through a washer 9.

Therefore, the number of parts is large, and the space for the terminals is also large.

Another disadvantage is that it is troublesome and expensive to embed the terminal fittings in the terminal block.

In consideration of this point, this proposal uses a terminal fitting that has a crimp part protruding from one end for crimping the end of the internal lead wire, and a terminal screw for connecting the external lead wire is screwed into the other end, and this terminal fitting is fitted. The device is characterized in that it can be attached to a terminal block in a formal manner.

Next, details of the present invention will be explained with reference to the embodiments shown in the figures.

Reference numeral 1 denotes an internal lead wire formed by extending the conductor of a stator winding (not shown) as it is, and is covered with an insulating tube 2.

Reference numeral 3 denotes a terminal fitting, as shown in FIG. 5, two pairs of claws 4 and 4' are provided on both sides at one end, spaced apart in the longitudinal direction, and an internal lead wire crimping part 5 is protruded from the other end. A punched screw 66 for connecting an external lead wire is provided at the crimping part 5 side, and cut and raised pieces 7 that open toward the crimping part 5 side are provided on both sides of the crimping part 5 side.
It is cut and raised in the same direction as the launch direction.

The tip of the internal lead wire 1 and the tip of the insulating tube 2 are crimped to the crimp portion 5 of this terminal fitting by caulking both claws 4, 4', and the terminal screw 8 is attached to the punched screw 60. is screwed in through washer 9.

10 is a terminal block that supports the terminal fitting 3, which is the third
As shown in FIG. 4 and FIG. 4, a slot 11 with one end closed is provided in the center of the surface on which the terminal fitting 3 is placed, and the slot 11 is closed at one end to escape the protruding edge of the punched screw hole 6 of the terminal fitting. A hole 12 is provided at the bottom of the end to allow the tip of the terminal screw 8 to escape.

In addition, terminal fittings 3 are provided on both sides of the above surface in parallel with the slot 11.
An insulating partition wall 13 is provided to sandwich the terminals in the width direction, and a hole 14 is provided on the open end side of the slot 11 on the surface between the partition wall and the slot 11, into which the cut and raised piece 7 of the terminal fitting engages. It is a provision.

Further, the insulating partition walls 12 on both sides are provided with protruding walls 15 facing the holes 14 and suppressing the protrusion of the terminal fittings 3.

To attach the terminal fitting 3 to the terminal block 10, first crimp the internal lead wire 1 to the crimp part 5 of the terminal fitting, and with the terminal screw 8 removed, insert the terminal fitting 3 into the slot 11.
It is inserted from the open end side between the terminal block surface and the insulating partition wall 13 and projecting wall 15 on both sides.

If the cut-and-raised piece 7 of the terminal fitting rises up on the surface of the terminal block in the middle, the upper surface of the terminal fitting will be pressed against the protruding wall 15, making insertion difficult. By pressing strongly against the resistance, the cut and raised piece 7 elastically engages with the hole 14 of the terminal block, and at the same time, the protruding edge of the punched screw hole 6 of the terminal fitting hits the closed end of the slot 11 and is installed. complete.

In this way, the terminal fitting 3 is prevented from slipping in the insertion direction by the protruding edge of the punched screw hole 6 touching the closed end of the slot 11, and the tip of the cut and raised piece 7 is prevented from slipping in the opposite direction by touching the closed end of the slot 11. This is done at the edge of 14.

After fitting the terminal fitting 3 into the terminal block 10 as described above, insert the terminal screw 8 into the punched screw hole 6 of the terminal fitting with the washer 9.
Screw it in through.

Note that the bottom of the hole 12 in the terminal block through which the tip of the terminal screw 8 escapes is closed as shown in FIG. If this is done, the terminal fitting 3 will be pressed against the projecting wall 15 by the spring 16, thereby eliminating wobbling of the terminal fitting.

This also prevents the terminal screw 8 from loosening.

Reference numeral 17 denotes a terminal box that accommodates the above-mentioned parts, and is screwed together with the terminal block 10 to the peripheral edge of the outlet hole of the machine frame 18.

As mentioned above, this method connects the tip of the internal lead wire by crimping it to one end of the terminal fitting, so it requires fewer parts than the conventional method that connects by tightening screws. , the terminal space can be reduced, and there is no risk of the connection coming loose.

In particular, in this case, if the internal lead wire is formed by extending the winding conductor, it can be connected without removing the insulation coating from the tip of the lead wire, and even if two wires are connected in parallel, connection can be made easily. .

Furthermore, since the terminal fittings are attached to the terminal block in a fitting manner, there is no need for the trouble of implanting them in conventional terminal blocks, and costs can be reduced.

Moreover, in this proposal, the slippage of the terminal fitting in the insertion direction is prevented by bringing the protruding edge of the punched screw hole of the terminal fitting into contact with the closed end of the relief groove of the terminal block, and the slipping in the opposite direction is also performed. Since the ends of the cut and raised pieces provided on both sides of the slip stopper and the terminal fitting are in contact with the hole edge of the terminal block, the bent part formed at the tip of the terminal fitting can be attached to the protrusion provided on the terminal block. This has the advantage that the length of the terminal fitting can be shortened, and the space for the terminal can be reduced accordingly, compared to the case where the terminal fitting is engaged with a portion or a recessed portion.

[Brief explanation of drawings]

FIG. 1 is a cutaway side view showing the terminal of the rotating electric machine according to the present invention;
Fig. 2 is a view in the direction of the arrow in Fig. 1, Fig. 3 is a plan view showing the terminal block taken out, Fig. 4 is a cross-sectional view taken along line A-A in Fig. 3,
Figure 5 is a perspective view showing the terminal fittings removed, and Figure 6 is the perspective view of the terminal fittings.
A drawing showing another embodiment corresponding to the above figure, and FIG. 7 is a drawing showing a conventional one. 1; Internal lead wire, 3; Terminal fitting, 5; Crimp part, 6; Hammered screw hole, 7; Cut and raised piece, 8; Terminal screw, 9; Washer,
10: Terminal block, 11: Relief groove, 13: Partition wall, 14: Cut and raised piece engagement hole, 15: Projecting wall, 16: Spring.

Claims (1)

[Scope of utility model registration request] A crimping part for crimping the end of the internal lead wire pulled out from the winding end is provided protrudingly at one end, a punched screw hole is provided at the other end, and a crimping part side is provided on both sides of the end on the crimping part side. A terminal fitting is formed with a cut-and-raised piece that opens at the center of the surface on which the terminal fitting is placed, and the protruding edge of the punched screw hole of the terminal fitting hits the closed end, and the terminal fitting is punched in this direction. It has an relief groove with the other end open to stop the terminal fitting, and partition walls are formed on both sides of the surface parallel to this groove to sandwich the terminal fitting in the width direction, and on the surface between the partition wall and the groove, the terminal fitting is The tip of the cut-and-raised piece touches the edge and has a notch to prevent the terminal fitting from being pulled out in the opposite direction, and projecting walls are provided on both sides of the partition wall to oppose this hole and suppress the protrusion of the terminal fitting. terminal block,
A terminal for a rotating electrical machine, comprising a terminal screw for connecting an external lead wire that is screwed into the punched screw hole of the terminal fitting through a washer.