JPH0445418Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Purpose of invention] (Industrial application field) The present invention relates to a terminal structure for a rotating electric machine.

(Prior art) Conventionally, the terminal structure of a motor has either been a direct lead wire type as shown in Figure 12, or a terminal box with lead wires and a terminal block housed inside as shown in Figure 13. The terminal box method is often used.

In the twelfth part, 1 is a lead wire connected to the coil inside the motor, and bushing 2
The crimp terminal 3 is attached to the tip. In FIG. 13, 4 is a terminal box, inside which a lead wire or a terminal block is housed and is connected to a power source.

However, in order to connect the power supply with either method, it was necessary to fasten the power supply using nuts, bolts, or the like.

Therefore, it takes a considerable amount of time to set up and connect power to a large number of machines, and there is a risk that the phase order of the power supplies may be incorrect.

Therefore, as a way to shorten the connection time and prevent the wrong direction of rotation, for agricultural motors etc.
In recent years, a method of using plug-in connectors as motor terminals has begun to be adopted.

An example of this plug-in type connector is the Molex Connector manufactured by Nippon Molex Co., Ltd., which has a pair of protrusions and recesses that perform the connection function, and the polarity of the connector is fixed to the plastic housing to prevent mating. It is set in. For agricultural motors, a method has become widespread in which one end of such a connector is attached to the tip of a cab tire cable or lead wire to serve as a terminal for power connection.

(Problems to be Solved by the Invention) However, when installing an agricultural motor in a limited space such as a rice huller or dryer, various lead wires become complicated and complicated. For this reason, there has been an especially increasing demand recently for attaching (one side of) a connector directly to the motor without providing a lead wire to the motor.

However, this type of connector is not originally intended to be firmly fixed, but rather is attached to a panel board using the ears provided on both sides of the plastic housing, or is left floating while still mated (dangleable). used in the state).

Therefore, the shape is simple, there is no way to securely attach it to the motor frame or similar parts, and there is no suitable terminal structure that can meet the demands for agricultural use.

The present invention was made to solve the above-mentioned problems, and aims to provide a terminal structure that securely fixes a connector using a simple method.

[Structure of the invention] (Means for solving the problem) The present invention is a connector having a plastic housing, and the lower edge of the connector is placed between a panel plate and a retaining plate having a plurality of protrusions around the periphery. A terminal for a rotating electrical machine characterized by being clamped and attached to the intermediate seat of the rotating electrical machine.

(Function) With this structure, the connector is firmly fixed to the intermediate seat of the rotating electric machine, with the lower edge of the connector firmly secured by the panel plate and the retainer plate, and without falling down due to the protrusion of the retainer plate.

(Example) An example of the present invention will be described below with reference to the drawings.

3 to 5 show the main points of the structure of one embodiment of the present invention. In FIG. 3, reference numeral 5 designates a panel board, which has a rectangular hole 5a through which a lead wire 7 of a connector 6 (to be described later) passes, an embossed screw hole 5b into which a retaining plate 9 is screwed, and an intermediate seat for the motor 20 or the terminal box of the motor 20. 13, and is manufactured by punching a steel plate with a certain strength.

Figure 4 shows the connector 6 with lead wires 7 and terminals 8 attached.The housing of the connector 6 is made of plastic such as Nine, and the terminal insertion part is designed to prevent incorrect mating with the mating connector. shape and front protrusion 6a
It has a polarity that has been carefully devised.

Furthermore, a rim (flange) is integrally molded at the lower part to make the connector 6 sit better. (The thickness of the edge is A.) Figure 5 shows a holding plate 9, which has a rectangular hole 9a for connector penetration and a mounting hole 9b, and is made of a steel plate with a certain strength like the panel 5. Manufactured by stamping. 9c is a small circular protrusion made by extrusion, which is one of the key points of the present invention. The dimension of this projection 9c is slightly smaller than the thickness dimension A of the edge (flange) of the connector 6. (In FIG. 5, the number of protrusions is 6 in total, 3 on each side.) Furthermore, the protrusions 9c may be of a bent shape.

The panel plate 5, connector 6, and retaining plate 9 of FIGS. 3 to 5 constructed in this way are assembled using tightening screws 10 as shown in FIGS. 6 and 7. That is, the lead wire 7 is inserted into the through hole 5a of the panel board 5.
Place the connector 6 on the panel board 5 through the
After covering it with a retaining plate 9 and passing the connector 6 through the square connector penetration hole 9b, tighten the tightening screw 1.
0, tighten the holding plate 9 to the panel plate 5. As the tightening screws 10 are tightened, the retaining plate 9 is moved to the panel plate 5.
However, when the protrusion 9c of the holding plate 9 comes into contact with the panel plate 5, the holding plate 9 touches the connector 6.
The edge 6b of is pressed down. In this way, the connector 6 is held between the panel plate 5 and the holding plate 9, and is securely fixed by the tightening screws 10.

The terminal parts assembled as shown in FIGS. 6 and 7 are attached to an intermediate seat 13 which is previously welded to the steel plate frame 11 of the motor via a bushing 12, as shown in FIG. Tightened.
The lead wire 7 is connected to the coil end 15 of the motor 20, as in a general motor, to establish electrical continuity with the terminal 8 inside the connector. 1 and 2 are a front view and a side view showing one embodiment of the entire motor having the terminal structure constructed in this way, and show that the connector 6 is securely attached to the intermediate seat 13. It shows.

With the above-described configuration, it is possible to satisfy the demand that a commercially available connector required for an agricultural motor be directly and reliably and firmly attached to the motor 20. This makes it possible to prevent phase sequence errors when connecting the power supply, shorten motor set time and eliminate the frequency of wiring work, and provide a motor suitable for mass production that is advantageous in terms of transportation and transport. can.

(Other Embodiments) FIGS. 9 and 10 show examples in which the method of forming and processing the holding plate 9 is changed. In Fig. 9, a bending process 9d is applied to both sides in place of the protrusion in Fig. 5. FIG. 10 shows a thin groove 9e formed by extrusion molding, and it is clear from the figure that the same effect as the protrusion can be obtained.

Furthermore, although the explanation has been given with reference to an example of a motor made of a steel plate frame, which is often used as an agricultural motor, it can also be applied to a cast iron frame motor having a terminal box mounting seat 16 as shown in FIG. Of course.

[Effects of the invention] As described above, according to the invention, it has a simple structure and can be used as a motor terminal by directly attaching it to the motor using a commercially available connector. Since the polarity is matched by pairing with the connector, errors in phase order can be prevented and a motor with the correct rotation direction can be obtained. In addition, since the lead wires are not pulled out to the outside of the motor, the complexity associated with the lead wires when setting the motor can be eliminated, making it easier to integrate into the machine, and the handling of the motor, such as transporting it, is also easier. A motor that is suitable for mass production can be provided.

[Brief explanation of the drawing]

Fig. 1 is a front view of a motor with a terminal structure according to an embodiment of the present invention, Fig. 2 is a side view of the motor, Fig. 3 is a perspective view of a panel plate constituting the structure of the present invention, and Fig. 4 is a perspective view of a connector. Figure 5 is a perspective view of the retaining plate;
Figure 6 is a side view showing the area around the terminal of the present invention, Figure 7 is its front view, Figure 8 is an enlarged side view of the main parts of the motor showing the area around the terminal of the invention attached to the motor, and Figure 9. FIGS. 9 to 11 show other embodiments of the present invention, and FIGS. 9 and 10 are perspective views showing modified examples of the retaining plate, and FIG. 11 is a side view of a terminal box mounting seat of a cast iron motor. 12 and 13 are front views of motors according to the prior art.
The figure is a front view of a direct lead wire type, and FIG. 13 is a front view of a motor having a terminal box type terminal structure. 5...Panel board, 6...Connector, 6b...
Lower edge of connector, 9... Holding plate, 9c... Protrusion, 20... Rotating electric machine.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A rotating electrical machine characterized by a connector having a plastic housing, the lower edge of the connector being sandwiched between a panel plate and a retaining plate, and mounted on an intermediate seat of the rotating electrical machine. terminal. (2) The terminal for a rotating electric machine according to claim 1, wherein the holding plate is provided with a protrusion whose size is slightly smaller than the thickness of the edge of the connector.