JPS605710Y2 - Electric motor - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an electric motor with an improved structure for insulating and fixing the connecting portion between the stator winding and the Hiji wire.

[Technical background of the invention]

Conventionally, in electric motors, when insulating and fixing the connection part where the winding wound around the stator core and one end of the eyeliner that conducts current to this winding are connected, this connection part is covered with a varnish tube. The varnish tube is then tied and fixed to the so-called coil end portion of the winding wire using Tetoron thread or the like.

[Problems with background technology]

However, with this configuration, there is a problem that the varnish tube protrudes further outward than the coil end portion of the winding, increasing the outer diameter of the stator accordingly. After inserting the connecting portion, it is time-consuming and extremely troublesome to tie it to the coil end portion of the winding wire using the varnish tube ratetron thread or the like.

[Purpose of invention]

The present invention was devised in view of the above circumstances, and its purpose is to insulate and fix the connecting portion between the winding and the Hiji wire without increasing the outer diameter of the stator, and with simple work. In addition, it is an object of the present invention to provide a motor in which the connection portions can be reliably insulated.

[Summary of the idea]

In order to achieve the above object, the present invention forms a wedge hole made of insulating material that fixes the winding wire in the slot of the stator core with one end closed. The entire connecting part is placed in the insertion position.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a stator core of an electric motor, which is made of a large number of silicon steel plates laminated like a circumference, and a cavity 2 for accommodating a rotor (not shown) is formed in the center of the core.

Reference numeral 3 denotes a semi-closed slot having an opening 3a narrower than the slot width, and a predetermined number of these are formed around the cavity 2 of the stator core 1.

Both ends of this slot 3 in the axial direction are open (only one end is shown in FIG. 2).

An insulating paper 4 is placed in the slot 3 to provide slot insulation, and is impregnated with an insulating material such as varnish.

Reference numeral 5 denotes a winding housed in the slot 3, and as is well known, the so-called coil side of the winding 5 wound in a hexagonal shape is inserted into the opening 3.
It is accommodated by being inserted into the slot 3 from a.

A stator 6 is formed by the stator core 1 and the windings 5.

7 is a sunrise wire for energizing the winding 5.

Reference numeral 8 denotes a wedge made of an insulating material, which is made of an electrically insulating material such as a synthetic resin such as Bonnisdell material.

9 is a hole extending in the longitudinal direction of the wedge 8 (also a hole, one end of which is closed).

Then, this wedge 8 is inserted from one end of the slot 3 in the axial direction of the stator core 1, that is, in the A direction, and is further pushed inward while holding and holding the coil side of the winding 5. Therefore, the wedge 8 is press-fitted into the socket 3.

Therefore, the wedge 8 fixes the winding 5 within the thrower 3 and prevents the winding 5 from flying out.

10 is a connection part where the winding 5 and the first output wire 7 are connected, and when this is insulated and fixed, the connection part 10 is inserted into the hole of the wedge 8 as shown in FIG. It is inserted from the open end of hole 9 and positioned entirely within hole 9.

In this case, the connecting portion 10 comes into contact with the inner circumferential wall of the hole 9 and does not move easily.

As described above, according to this embodiment, the wedge 8 having the hole S with a closed end 7 is installed in the slot 3, and the winding 5 and the lead wire 7 are connected to the hole 9 of this wedge 8. Since the entire joined connection part 10 was inserted (and insulated and fixed with -), varnish tubes, Tetoron threads, etc. were no longer needed, unlike in the past, and the connection part 10 was inserted into the varnish duplex and Tetoron threads were inserted. There is no need to bind the stator 6 with a wire, etc., and therefore the outer diameter of the stator 6 can be reduced accordingly.

Moreover, the connection part 10 can be insulated and fixed by the simple operation of inserting the connection part 10 into the hole 9, improving workability.
7 advantages, and overall manufacturing costs can be reduced.

By the way, assuming a configuration in which the wedge 8 is formed with a hole that is open at both ends and the connecting portion 10 is inserted and fixed into this hole,
In this case, if the amount of insertion is made larger than necessary when inserting and fixing the connecting portion 10 into the hole, the tip of the connecting portion 10 will protrude from the hole and be exposed outside the wedge δ.
This poses a safety problem that may result in insulation of the connecting portion 10, and therefore, it is necessary to be careful about the amount of insertion of the connecting portion 10 when inserting the connecting portion 10.

However, in this embodiment, since one end of the hole 9 is closed, it is assumed that the amount of insertion of the connecting portion 10 into the hole 9 is increased by 1.
- Even if the connecting portion 10 is in contact with the closed end of the hole 9, the leading end of the connecting portion 10 is not exposed outside the wedge 8.

Therefore, the entire connecting portion 10 can be reliably positioned within the wedge 8 at all times, the insulation of the connecting portion 10 can be ensured, and there is no need to be so careful about the amount of insertion of the connecting portion 10 into the hole 9. However, it is only necessary to ensure that the entire connecting portion 10 is inserted into the hole 9, and the work of insulating and fixing the connecting portion 10 is extremely simple.

Note that unlike the rotor, the stator 6 is not subject to external forces such as centrifugal force due to rotation, so the connection portion 1 is inserted into the hole 9.
Even if the structure is as simple as inserting a 0, the connection part 10 will not come out from the hole 9, and it can withstand practical use.

[Effect of idea]

As described above, the present invention is to form a hole in which one end is closed and is made of an insulating material for fixing the winding in the stator core. Since the structure is such that the entire connecting part between the and the guide line is inserted into the insertion position, the connecting part can be insulated and fixed without increasing the outer diameter of the stator, and the outer diameter is smaller than that of conventional stators. The dimensions can be reduced, and the insulation and fixation of the connection part can be done with a simple operation, which improves workability and thereby reduces the manufacturing cost. An effective electric motor can be provided.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a side view of the stator, FIG. 2 is an enlarged perspective view of the main part, and FIG. 3 is a longitudinal sectional side view of the main part. In the drawing, 1 is a stator core, 3 is a slot, 5 is a winding, and 7 is a stator core.
8 indicates a sunrise line, 8 indicates a wedge, 9 indicates a hole, and 10 indicates a connecting portion.

Claims (1)

[Scope of utility model registration request] A wedge made of insulating material that fixes the winding in the slot of the stator core is formed with a hole with one end closed, and the entire connecting part between the winding and the eyeliner is inserted into this hole. consists of an electric motor.