JPH0314933Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is based on extremely thin conductors that constitute stators of rotating electric machines, especially stator coils of small electric motors.
This invention relates to an improvement in a conductor connection section for connecting to a relatively thick conductor on the power supply side.

[Prior art] Conventionally, the connection between the extremely thin conductor of the stator coil of this type of small electric motor and the relatively thick conductor on the power supply side was difficult to automate and was done manually. Automation has become possible by interposing a terminal piece supported by a terminal block between the conductor and the conductor.

Figures 1 and 2 show conventional examples of this type of conductor connection device. In the figures, 1 indicates a stator core, 2
is a stator coil wound around the stator core 1, 3 is a conductor constituting the stator coil 2, 4 is fixed to the end face 1a of the stator core 1 via the leg portion 4a, and the axial direction of the coil end 2a is A terminal block 5 made of an arc-shaped insulator supported so as to cover the outer end face is radially fixed to the axial outer end face of the terminal block 4, and has a hook for hanging the coil conductor 3 on the radial outer end. Stop part 5
a, and a terminal piece 7 having a convex portion 5b for connecting the power supply side conductor 6 at the radially inner end thereof;
is provided on the axially outer side of the terminal block 4 to face it, and is a hole for holding the power supply side conductor 6 on the axially inner surface and for connecting the convex portion 5b of the terminal piece 5 and the power supply side conductor 6. It is an arc-shaped end plate made of an insulator with a shape 7a formed thereon.

As configured above, the hooking portion 5a of the terminal piece 5
The coil conductor 3 is hooked onto the terminal piece 5, the hooking portion 5a is sandwiched between electrodes, and the coil conductor 3 is welded to the terminal piece 5 by applying current and heating. By the way, in order to facilitate the above work, the terminal piece 5 protrudes from the outer periphery of the terminal block 4, but in order to reduce the external dimensions of the motor, after connecting the coil conductor 3 to the terminal piece 5, the terminal piece 5 is Bend it at right angles inward in the axial direction along the outer periphery of the terminal block 4. As a result, there is a risk that the coil end 2a and the terminal piece 5 will come close to each other, causing an insulation problem, and the protruding part of the terminal piece 5 is usually covered with an insulating sleeve 8 before the terminal piece 5 is bent. .
Next, the end plate 7 shown in FIG. 2 is turned over, the position of the hole 7a of the end plate 7 is aligned with the position of the convex part 5b of the terminal piece 5, the end plate 7 is fixed on the terminal block 4, and soldered. Connect the power supply side conductor 6 to the convex portion 5b of the terminal piece 5 by using the above method.

As described above, the connection between the coil conductor 3 and the power supply side conductor 6 can be automated via the terminal piece 5 fixed to the terminal block 4.

[Problem to be solved by the invention] Since the conductor connection part of the stator of the conventional small electric motor is configured as described above, the external dimensions are extremely limited depending on the application, so it is difficult to The distance between the outer covering of the frame, bracket, etc. and the internal electrical parts becomes closer, and the bent part 5c of the terminal piece 5 bent at the outer periphery of the terminal block is exposed from between the terminal block 4 and the end plate 7. However, there was a problem that the insulation distance between the terminal piece 5 and the outer cover of the motor might be insufficient.

This invention was made to solve the above-mentioned problems, and its purpose is to obtain a stator for a rotating electric machine having a conductor connection portion with high insulation reliability.

[Means for Solving the Problems] A stator for a rotating electric machine according to the present invention is characterized in that an axially inward protrusion is provided on the outer periphery of the end plate to cover the radially outer side of the bent portion of the terminal piece. That is.

[Function] In the stator of a rotating electric machine according to this invention, the axially inward protrusion provided on the outer periphery of the end plate covers the radially outer side of the bent portion of the terminal piece and separates it from the bare live part of the terminal piece. Increase the insulation distance between the motor and the outer sheath.

[Example] An example of this invention will be described below with reference to FIGS. 1 and 3. In FIG. 3, the same reference numerals as those in FIG. 2 indicate the same or corresponding parts, and 7b is provided on the outer circumferential portion of the end plate 7 and extends axially inward to cover the radially outer portion of the bent portion 5c of the terminal piece 5. It is a protrusion.

By fixing the end plate 7 configured as described above to a predetermined position of the terminal block 4, the bent portion 5 of the terminal piece 5 exposed from between the terminal block 4 and the end plate 7 is fixed.
It can cover c.

[Effects of the invention] As described above, according to this invention, the end plate is provided with a protrusion that covers the bent part of the terminal piece fixed to the terminal block, so that the bare live part of the terminal piece can be sufficiently covered. This has the effect that a highly reliable rotor of a rotating electrical machine with high insulation properties at the conductor connection portion can be obtained at low cost.

[Brief explanation of the drawing]

Figures 1 and 2 show conventional examples, Figure 1 is a perspective view showing the state in which the terminal piece is attached to the terminal block, Figure 2 is a rear perspective view of the end plate, and Figure 3 is one example of this invention. FIG. 7 is a rear perspective view of an end plate, showing an example. In the figures, the same reference numerals indicate the same or equivalent parts, 2 is a stator coil, 2a is a coil end,
3 is a coil conductor, 4 is a terminal block, 5 is a terminal piece, 5c
is a bent portion, 6 is a power supply side conductor, 7 is an end plate, and 7b is a protrusion.

Claims (1)

[Scope of utility model registration request] A terminal block 4 made of an insulator is supported so as to cover the axially outer end face of the coil end 2a, and is radially fixed to the axially outer end face of this terminal block 4, so that the terminal conductor 3 of the stator coil 2 is radially fixed to the axially outer end face of the terminal block 4. A terminal piece 5 that is connected to the outer end and whose radially outer end located outside the outer periphery of the terminal block 4 is bent inward in the axial direction along the outer periphery of the terminal block 4.
and facing the terminal block 4 on the outside in the axial direction,
It is made of an insulator that has a hole 7a for connection work at a position facing the radially outer end of the terminal piece 5, and holds the power supply side conductor 6 at a position facing this hole 7a on the axially inner surface side. In the stator of a rotating electric machine having an end plate 7, the terminal piece 5 is provided on the outer periphery of the end plate 7.
A stator for a rotating electric machine, characterized in that a stator for a rotating electrical machine is provided with an axially inward protrusion 7b that covers the radially outer side of the bent portion 5c.