JPS5825747Y2 - A device for inserting insulating materials into the slots of electrical machines. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for inserting an insulating member into a slot of a motor, generator, etc.

In the embodiment described below, a motor will be specifically described, but the invention can also be easily applied to a generator or a field force generator.

Slots in electric motors are usually formed at equal angles, but in order to improve intake characteristics, etc., they may be formed at uneven positions, and moreover, at positions deviating from the line toward the center.

Furthermore, the opening areas are also different.

This is commonly called a longage slot, and although its mechanical properties are greatly improved, the insertion of the insulating member cannot be automated, making it expensive.

In particular, the insulating parts are made of insulating paper, and the material cost is very low, but in Crazy Slots, it cannot be mechanized and has to be done by hand, making the product as a whole expensive. It is.

There are three main methods for insulating this type of electrical machinery:

Namely, (1) so-called F, which gels powdered resin by heating it and solidifies it by after-curing to form an insulating layer.

(2) the so-called molding method, which uses a slot insulator made of a molded product in which a liner is formed on the flange to insulate the slot;
3) In addition, there is a slot insulator insertion method described in the present invention.

Each of these methods has the following characteristics and drawbacks.

First, the F, B, and C methods (1) are often used to coat the armatures of automobile starters and micromotors, and the biggest advantage is that they can achieve the purpose of insulation without being affected by the thickness or shape of the core. Although it is a characteristic, it also has the following serious drawbacks.

(a) The materials are expensive.

(b) Unevenness occurs in the coating layer.

(C) Resin may adhere to the inner peripheral opening of the slot, interfering with the work when inserting the coil.

(d) Pinholes occur at the same time as unevenness occurs in the coach ink layer, which may reduce the pressure resistance life and cause pressure resistance failure.

(e) The scattering of powder does not have a positive effect on the human body.

(f) Requires large and expensive equipment;

(g) When a defect occurs, all cores become defective and must be discarded.

Next, the advantages of the slot insulation material insertion method will be explained in comparison with the mold method.

(a) Material costs are very low.

(b) The amount of loss when defects occur is small.

(C) Since this method has a proven track record, there are few technical considerations and it is possible to switch to another model in a short period of time.

(d) No expensive molds are required.

(e) There is flexibility in changing the core lamination of stators, etc.

(f) The molding method requires an automatic machine to automatically insert the stator into the stator.

(g) The slot insulator insertion machine can be used for other models at low cost.

In this explanation, all molding methods are inferior to slot insulation material insertion methods.

As is clear from the above explanation, the slot insulator insertion method is very advantageous compared to the other three methods, and even slots (usually all of this type) can be inserted with a simple automatic machine. be.

However, if so-called crazy slots are formed unevenly in order to improve electrical properties, the slot insulation insertion machine automatically becomes very complicated and expensive, and even though the material cost is low, the result is The final product becomes expensive.

Furthermore, the machine is dedicated to a specific model, and if the shape of the slot is different, another dedicated machine must be manufactured, which adds to the increase in price.

The present invention has been devised to address the above-mentioned problems and to provide a device that can easily insert slot insulators into crazy slots in order to improve electrical characteristics.

Furthermore, the device is very inexpensive and highly reliable.

Next, one embodiment of the present invention will be described based on the drawings.

For convenience, this embodiment will be described with reference to a case where a slot insulator is inserted into the stator core of an electric motor, but it goes without saying that the same applies to the case where an insulator is inserted into a slot in a generator or other electric machine.

Figure 1 shows a stator core that has been used in large quantities in the past.
is formed.

These slots 2 have the same size, and furthermore, the angle toward the center matches each adjacent slot by a degree.

3 indicates the dividing line of the slot, and 4 indicates the center of the stator 1.

When inserting the slot insulator into the equally divided and equally sized slots, the slot insulator could be easily inserted mechanically and there was no problem with separate installation.

FIG. 2 shows a stator core to which the present invention is applied, and is characterized in that the sizes of the slots and the directions of the slots are not the same.

This stake core has so-called crazy slots, and in this drawing there are four types of slots, 2-1.2-2.2-3 and 24.

The inner peripheries of the slots, that is, the entrance openings of the slots, are at the same angle β, but the angle toward the back does not coincide with the angle β, as shown by the slot center line 6.

In other words, the 2-1 slot is γ degrees, and the 2-2 slot is δ
The slots at 2-3 have a deviation of μ degrees, 2-4
The slots have a deviation amount of ε degrees and each size is different.

Slots with different sizes and directions in this way improve electrical characteristics, increase output, and reduce magnetism and noise, which is a favorable result in terms of characteristics. However, on the other hand, the slot insulator It would be very difficult to insert the stator by machine, and a special machine would be used only for that stake, making the stator product more expensive.

Furthermore, due to the lack of machinery, most of the work had to be done by hand, making it extremely troublesome and expensive.

However, the requirements for crazy slots are high and a simple slot insulation insertion machine is desired.

The present invention meets this need by providing a very simple and reliable slot insulation insertion machine.

The basis of the present invention is the use of a block with twisted holes as shown in FIG.

This block is applied to the core of a stake, etc., and the slot insulating member is inserted into the slot of the core through the twisted groove of the block.

An embodiment of the present invention will be described below based on FIGS. 3 to 5.

In FIG. 3, 11 indicates the entire block, 12 indicates its front end surface, and 13 indicates its rear end surface.

14 is a reference slot, and 15, indicated by a dotted line, is its virtual projection slot.

1b is a crazy slot formed by the projection slot 15 of the reference slot 14 and twisted by an angle θ, and is shown by a solid line on the rear end surface.

The groove actually formed in this block 11 is formed by a line connecting the reference slot 14 and the crazy slot 16 in a straight line.

The crazy slot 16 is brought into contact with the end face of the core to be inserted, and corresponds to the crazy slot formed in this core.

A protruding rod insertion hole 17 is formed perpendicularly to the twisted groove formed in this manner so as to be perpendicular to the twisted groove.

The thrust rod insertion hole 17 is made wider than the twist groove width at the reference slot 14, crazy slot 16, or any position therebetween.

Furthermore, it is desirable that the hole be a straight hole (for guiding and inserting the protruding Azusa).

To summarize the shape of the block 11 described above, the front end face of the plate having a thickness of l is provided with a slot that coincides with the slot center line or the slot equal division line, and the rear end face is provided with a slot that matches the slot of the stator core to be inserted, for example, a crazy slot. A pattern of crazy slots is formed, a twisted groove is formed connecting the two, and a projecting rod insertion hole wider than this groove is formed perpendicular to the twisted groove.

Therefore, if an insulating paper such as Mylar cut to an appropriate length and width is inserted into the reference slot 14 and pushed in with a pusher, the insulating paper will be twisted sequentially along the twist groove and come out of the crazy slot 16. However, the end surface of this insulating paper is aligned with the crazy slot of the stator core, and can be easily inserted into the crazy slot of the stake core.

Next, an embodiment of the entire apparatus will be described based on FIG. 4.

When targeting a stator core with crazy slots as shown in Fig. 2, the slots are as shown in Fig. 2 < 2-
There are four types of slots: 1, 2-2, 2-3, and 2-4, and since the inclinations are different on the left and right sides, it is thought that there are eight types of slots.

However, it is easy to set eight types of outlet side crazy slots (corresponding to 16 in FIG. 3) of the twist groove, that is, the exit side of block 21 (corresponding to block 11 in FIG. 3) to match the crazy slots of the stator core. Insulating paper such as Mylar can be inserted.

In FIG. 4, reference numeral 21 denotes a block having twist grooves, which is fixedly supported by a center pole 22 integrally with a stator core 23 having crazy slots.

Reference numeral 24 denotes a feeding roller for insulating paper 25, for example, Mylar, which is fed as needed (actually, in synchronization with the pitch of the slots of the stator core).

) is sent by a certain width. Reference numeral 26 denotes a magazine which is formed so that the insulating paper 25 can be easily inserted into the slot, and has a forming groove 26-1 on the outer periphery which is as long as or slightly longer than the length of the insulating paper 25 in the axial direction.

Preferably, this groove is sized to fit the crazy slot.

Furthermore, it is effective to match the pitch and number to the number of crazy slots and the standard slot at the entrance of the block 21.

27 is a drive cam, and 28 is a link mechanism that transmits the force of the drive cam 27 to the cutter 29.

That is, when the drive cam 27 rotates once, the cutter 29 makes one reciprocation.

Further, the cutter 29 cuts the insulating paper 25 by a certain width and inserts the insulating paper 25 into the forming groove 26-1 of the forming magazine 26 from the circumferential direction to form the insulating paper 25 as a final insulating member as shown in 31.

Numeral 32 is a protrusion that serves to push up the insulating member 31 within the molding groove 26-1.

Reference numeral 33 denotes a twisted groove formed in the block 21, which receives and guides the insulating member 31 pushed up by the uplifting rod 32.

34 indicates a crazy slot of the stator 23.

A transmission gear 35 operates the center pole 22 and the forming magazine 26, and is configured to rotate periodically.

All operating elements of these devices are designed to operate synchronously.

To explain the overall operation flow, when the drive cam 27 rotates once, the feed roller 24 feeds the insulating paper 25 by a certain width, and at the same time, the cutter 29 enters the forming groove 26-1 of the forming magazine 26.

Therefore, the insulating paper 25 cut by a certain width is pressed into a certain forming groove 26-1 and formed.

At the same time, the uplifting rod 32 pushes up the insulating member 31 from below.

The insulating member 31 that has been further pushed up is inserted through the reference slot (FIG. 3, 14) of the block 21, twisted within the block 21, and inserted into the crazy slot 34 of the stator core 23.

Next, each is rotated by -pitch and the same operation is repeated.

FIG. 5 is a diagram illustrating and explaining only the essential parts of this operation, and shows a case where only one molding magazine 26 (for convenience's sake) is molded.

) The insulating paper 25 is inserted into the molding groove 261 and molded, and then the insulating member 31 is moved to the left using the thrusting rod 32.

To the left is the block 21, and the insulating member 31 is twisted in the twist groove 33 and inserted into the crazy slot 34 of the stake core 23.

Although it is shown horizontally in this drawing, it is natural that it is the same even if it is vertically arranged.

Furthermore, the projecting frame 32 has a forming magazine 26 and a block 21.
Penetrating both means that the insulating member 3 is inserted into the stator core 23.
It is natural considering that 1 is inserted.

It should be noted that there is also a protruding rod insertion hole 26-2 perpendicular to the forming groove 26-1 of the forming magazine 26.

Furthermore, it is natural that the width of the thrusting rod insertion hole 26-2 is larger than the width of the forming groove 26-1 because it is necessary to push up the insulating member 31.

Furthermore, since both ends of the insulating paper 25 need to be bent as shown by the dotted lines in FIG. 4, it is necessary to use other means, for example, provide another roller in addition to the feed roller, and use this roller to perform the bending. is also possible.

Well-known means are sufficient.

The above-mentioned configuration is especially effective when applied to a stator core with several types of crazy slots of different sizes and angles, but in the following cases, the molded macazin 26 can be omitted and it can be simply used. It can also be done using only blocks.

That is, firstly, there are slots of the same shape that differ only in angle, and secondly, several stations are arranged so as to selectively insert only into slots of the same shape, such as a transfer type and an index method.

The effects of implementing the present invention are listed below.

(1) It has become possible to automatically insert a slot insulating member into a stator core having so-called crazy slots having a plurality of types of slots of different sizes and angles, or into an electric machine having such slots.

(2) It was realized with a very simple configuration.

(3) A significant reduction in man-hours and therefore a significant reduction in depreciation can be expected compared to when the process was done manually.

(4) When used in combination with a molded magazine made of insulating material, automatic insertion into the crazy slot described in (1) becomes possible with a single device.

(5) An electric machine equipped with a crazy slot could be provided at a low cost.

(6) Since the configuration is very simple, manufacturing, maintenance, and inspection are easy.

(7) Since the mechanism is simple, the lifespan is long.

(8) It can be easily changed to other specifications by simply changing or replacing some components such as the molding magazine.

(9) Versatile.

(↑0) Combination with other automatic machines creates the possibility of complete automatic assembly.

Although the above configuration has been described for the case where an insulating member is inserted into the slot of the stator core of an electric machine, it is similarly applicable to other electric machines.

[Brief explanation of the drawing]

The drawings are provided to explain the present invention. Fig. 1 is a partial front view of a conventional common stake core, and Fig. 2 is a partial front view of a stator core to which the present invention is applied and is effective. 3 is a front view, FIG. 3 is an explanatory diagram of the twisting member, FIG. 4 is an explanatory diagram of the mechanism of the entire device, and FIG. 5 is an explanatory diagram of the operation of the main parts. 17...Protruding rod insertion hole, 21...Block, 22...Center pole, 23...
・Stake core, 24...Insulating paper, 25...
...Feed roller, 26...Forming magazine, 2
6-1...Molding groove, 27...Drive cam, 29...Cutter, 31...Insulating member, 32...Protrusion Frame, 33... twist groove, 34... crazy slot.

Claims (1)

[Scope of utility model registration request] A stator core having a plurality of slots whose center lines have different angles from each other, a cutter device that appropriately cuts the slots into which insulators are to be inserted into a width commensurate with the size of each slot, a cam device that drives the cutter device, and a molding device. A block having a twisting groove that gradually twists the insulating member so as to match the center line of each slot as the tip of the insulating member moves toward the tip, and a protruding azusa that presses and inserts the insulating member twisted by the twisting groove of the block into the slot of the stator. A device for inserting an insulating member into a slot of an electric machine, the outlet opening of each twisted groove of the block being aligned with a plurality of slots of the stator core to be inserted.