JP2897913B2 - Commutator device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commutator device, and more particularly to a commutator device having an improved connection between a terminal of a winding and a commutator.

[0002]

2. Description of the Related Art Conventionally, the connection technology between a winding and a commutator has been described as follows.
After winding the coil on the terminal side of the winding to the riser of the commutator, the riser is swaged and the current is applied at the same time as crushing the kinked portion of the coil. The technology and the winding film are made of a film with lower heat resistance than solder, and the coil on the terminal side of the winding is tied to the riser of the commutator. And the like are known.

[0003] Also, the winding is sandwiched between the keyhole-shaped slots of the commutator,
With the sharp blade made in the keyhole type slot at the same time as sandwiching,
Break the coating of the winding and make a contact connection.
No. 0) is also known.

[0004]

In the prior art in which the terminal coil of the winding is wrapped around the riser of the commutator, since the riser must be provided in the segment, there is a disadvantage that the segment processing becomes complicated. .

In the fusing technique for joining the winding end and the riser, the welding portion is heated by heating, so that the commutator is apt to be deformed, the steps of the segments and the separation are easily generated, and the time required for welding is reduced. Therefore, there is a problem in production efficiency. In addition, there are also inconveniences that management items such as a pressing force, a current value, and an energizing time increase, and that it takes time to determine conditions. Further, since the welding electrode is severely worn, it is necessary to frequently replace the welding electrode, and there are also problems such as setup time and electrode maintenance.

[0006] The soldering technique for joining the winding end and the riser requires a pretreatment with a chemical or the like in order to peel off the coating of the winding before soldering. In addition, there are many management items such as temperature and amount at the time of soldering, and a time for melting and fixing the solder is required, which is disadvantageous in production efficiency. In addition, there is an inconvenience that the solder or the dirt adheres to the commutator segments, which tends to cause defects such as a layer and a brush sound.

In the technique proposed in Japanese Utility Model Laid-Open Publication No. 33580/1990, it is necessary to make a contact as a substitute for a riser of a commutator, so that the number of machining increases and machining becomes difficult. In addition, since the terminal coil of the winding must be engaged with the recess or slot, the diameter of the winding is limited to some extent, and a commutator that matches the winding diameter is required, and standardization to promote the use of common components And so on. The above is disadvantageous in that the cost is increased.

An object of the present invention is to provide a commutator device which eliminates a riser of a commutator, does not require fusing and soldering of a winding terminal, and can easily connect a coil of a winding terminal to a commutator. It is in.

Another object of the present invention is to provide a commutator device which can omit a previous step of commutator processing conventionally performed and can cope with a wide range of winding diameters. .

[0010]

According to a first aspect of the present invention, there is provided a commutator including a commutator having a segment having no riser provided on the outer periphery of a cylindrical portion, and a commutator having the commutator and a holder assembled. A holder, the holder comprising: a cylindrical portion; and a winding engaging portion provided around a part of the surface of the cylindrical portion, wherein the segment engages with the winding when the segment is mounted. A plurality of sharp small protrusions are formed on a surface that engages with the joining portion via the winding, and the winding is wound on the engaging portion of the winding, and the holder and the segment of the small protrusion forming portion are assembled. The winding film is destroyed by the small projections, and the segment and the winding are electrically connected.

In the commutator device according to a second aspect of the present invention, the engaging portion of the winding provided around a part of the surface of the cylindrical portion of the holder includes:
It is characterized by comprising concave portions formed at predetermined intervals formed in the upper portion of the cylindrical portion.

In the commutator device according to a third aspect of the present invention, the engaging portion of the winding provided around a part of the surface of the cylindrical portion of the holder includes:
A groove is formed in the outer periphery of the side surface of the cylindrical portion for engaging the winding in a loop, and the small protrusion formed on the segment is formed at a position matching the winding position of the winding in the groove. It is characterized by the following.

In the commutator device according to a fourth aspect of the present invention, the engaging portion of the winding provided around a part of the surface of the cylindrical portion of the holder includes:
It is characterized by comprising convex portions formed at an upper portion of the cylindrical portion at predetermined intervals, and grooves provided on both sides of the convex portion on the outer periphery of the side surface of the cylindrical portion to engage in a loop shape with windings.

[0014] The commutator device according to claim 5 of the present application is characterized in that the holder is connected to the shaft side by coupling means.

The commutator device according to claim 6 of the present application is characterized in that the holder is formed integrally with a rotating shaft constituting a rotor.

[0016]

In the commutator device according to the present invention, the holder has a cylindrical portion and a winding engaging portion provided around a part of the surface of the cylindrical portion. A plurality of sharp small protrusions are formed on the surface that engages with the wire engaging portion via the winding, and the winding is wound on the engaging portion of the winding, and the holder and the segment of the small protrusion forming portion are connected. Assemble,
Since the winding film is destroyed by the small protrusion and the segment and the winding are connected, the terminal of the winding can be connected to each segment. At this time, the winding film is broken by the small protrusion and the connection is made conductive. Therefore, processing such as soldering becomes unnecessary.

Further, since the operation is performed only by press-fitting, the time can be shortened, the production efficiency can be improved, and the yield can be improved at the time of manufacturing the commutator ring. Therefore, it is possible to significantly reduce costs. Furthermore, since no pressing force or heat is applied unlike fusing, deformation and cracks do not occur in the resin portion of the commutator, and stable quality can be obtained.

Since there is no need to provide a riser in the commutator, the outer diameter of the commutator can be reduced, and the size can be further reduced. When the commutator holder is integrally formed with the insulator, it is not necessary to form four grooves on the shaft or use an adhesive to fix the commutator.

[0019]

An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the present invention.

FIG. 1 shows a first embodiment of a commutator device according to the present invention, in which a perspective view for explaining the assembling of a holder and a commutator, and FIG. 2 shows a second embodiment of the present invention. FIG. 3 is a perspective view for explaining the assembling of the holder and the commutator, FIG. 3 is a perspective view for explaining the combination of the holder and the commutator of the embodiment shown in FIG. 2, and FIG. 4 is a third embodiment of the present invention. FIG. 5 is a perspective view illustrating an example of a combination of a holder and a commutator segment similar to FIG. 3, and FIG. 5 is a view illustrating a fourth embodiment of the present invention.
FIG. 6 is a perspective view illustrating a combination of a holder and a commutator segment similar to that of FIG. 6. FIG. 6 illustrates a fifth embodiment of the present invention, and illustrates a combination of a holder and a commutator segment similar to FIG. FIG. 7 shows a sixth embodiment of the present invention.
FIG. 4 is a perspective view illustrating an example and illustrating a combination of a holder and a commutator segment similar to FIG. 3.

FIG. 8 shows a seventh embodiment of the present invention and is a perspective view for explaining a combination of a holder and a commutator segment similar to FIG. FIG. 9 is a perspective view showing a state in which the holder and the shaft are integrally formed, and FIG.
Is a perspective view showing a state in which the holder and the shaft are assembled, FIG. 11 is a perspective view showing another embodiment showing a state in which the holder and the shaft are assembled, and FIG. 12 is a view showing a state in which the holder and the shaft are assembled. It is a perspective view showing other examples.

The commutator device S of this embodiment has a commutator 10 and a holder 20 as main components, and the commutator 10 of this embodiment has a segment 13 having no riser attached to the outer periphery of a cylindrical portion 11. Is formed.

The cylindrical portion 11 has a through hole 12 formed in the center of the shaft 30. Segments 13 are formed on the outer periphery of the cylindrical portion 11 at equal intervals. Each segment 1
An insulating part 15 is formed between the three.

The segment 13 of this embodiment is formed to be curved so as to match the outer peripheral surface of the cylindrical portion 11. The segment 13 of this example has a surface that engages with an engagement portion 22 of the holder 20 described below via the winding 40 when the segment is mounted,
For example, in the embodiment of FIG. 1, a plurality of sharp small projecting strips 14 are formed on the outer peripheral surface of the segment 13 on the holder 20 side.
Are formed. In addition, as a manufacturing method of the above-mentioned segment, it can be performed by pressing, punching, molding or other means.

The holder 20 of this embodiment has a shallow cylindrical portion 21 on its upper surface and a supporting portion 25 continuous with the shallow cylindrical portion 21, and a through hole 26 of a shaft 30 is formed at the center of the cylindrical portion 21 and the supporting portion 25. Have been. The inner diameter of the cylindrical portion 21 of this embodiment is slightly larger than the outer diameter of the commutator 10 so that the commutator 10 is fitted therein. In this example, the small gap formed between the inner diameter of the cylindrical portion 21 and the outer diameter of the commutator 10 is determined by the diameter of the wire 40 depending on the wire diameter of the winding 40.

A part of the surface of the cylindrical portion 21, in the embodiment shown in FIG.
2 are provided around. The engaging portion 22 engages with the winding 40, and in the embodiment shown in FIG.
24. In this example, the recesses 23 are formed to have the same width, but every other protrusion 24 is formed to have a different width in the outer peripheral direction. The number of the convex portions 24 is equal to the number of the insulating portions 15 of the commutator 10 so as to match the position of the insulating portions 15 formed between the segments 13 of the commutator 10.

On the opposite side of the engaging portion 22, a support portion 25 of the cylindrical portion 21 is formed. The support portion of the present example has a larger diameter than the shaft 30, but has a smaller diameter than the cylindrical portion 21.

Next, the assembling of the commutator device S having the above structure will be described. First, the holder 20 is press-fitted into the shaft 30 of the rotor (not shown), and the shaft 30 and the holder 20 are assembled together. Next, a winding operation of the rotor is performed. This winding operation is performed by a known means. The end of the winding 40 of the rotor is connected to the commutator 10. At this time, the end of the winding 40 wound around a predetermined rotor slot is connected to the irregularities 23, 24. Hook and wind to a predetermined position. Thus, the uneven portions 23 and 24
The ends of the predetermined winding 40 are hooked on all the concave portions 23.

Then, the commutator 10 is pressed into the shaft 30 and fitted into the cylindrical portion 21. This fixes the commutator 10 to the shaft 30 and at the same time
And is fixed together.

At the time of this press-fitting, the winding wire 40 hooked on the concave and convex portions 23 and 24 is pressed between the inside of the cylindrical portion 21 and the plurality of small projecting striations 14, and the striations 14 are wound. The wire coating is broken, and the segments 13 and the windings 4 of the commutator 10 are broken.
0 will be connected. That is, the terminal of the winding 40 is
The film of the winding 40 is broken by rubbing with the striations 14, and electrical conduction can be achieved. This completes the assembly of the commutator device S.

FIG. 2 shows a second embodiment of the present invention and is a perspective view for explaining the assembling of the holder and the commutator. In this embodiment, the same members as those of the embodiment shown in FIG.

In the commutator device S according to the present embodiment, a winding is formed around a part of the surface of the cylindrical portion 21 of the holder 20 as an engaging portion of the winding around the outer peripheral side surface of the cylindrical portion 21 constituting the holder 20. An engaging groove 27 for engaging the wire 40 in a loop shape is formed, and as a small projection formed on the segment 13, an extension 16 is formed.
7 is formed at a position matching the winding position of the winding 40.

That is, as shown in FIG.
Each of the segments 13 constituting the “0” has an extended portion 16 extending downward from the cylindrical portion 21, and small projections 17 are formed at both inner ends of the extended portion 16. The width of the extension 16 in this example is formed smaller than the width of the segment 13.

On the other hand, the holder 20 has an engaging groove 27 for engaging the winding 40 in a loop shape on the outer peripheral side surface of the cylindrical portion 21 at a position matching the extending portion 16. That is, as shown in FIG. 2, the engagement groove 27 is formed from two recesses 27 a and 27 b so as to match the position of the small projection 17 of the extension 16 of the segment 13. Engagement groove 27 of this example
Is a curved portion 27c having a curved upper portion between the two concave portions 27a and 27b. A partition 29 is formed between the adjacent engaging grooves 27.

In mounting the commutator device S in this embodiment, first, the holder 20 is press-fitted into a shaft 30 of a rotor (not shown), and the shaft 30 and the holder 20 are assembled integrally. Next, a winding operation of the rotor is performed. This winding operation is performed by a known means. The end of the winding 40 of the rotor is connected to the commutator 10. This point is shown in FIG.
This is the same as the embodiment shown in FIG. Then, at this time, the end of the winding 40 wound around the predetermined rotor slot is hooked on the two recesses 27a and 27b of the engagement groove 27 at the predetermined position and wound. Thus, the ends of the predetermined windings 40 are hooked on all the engagement grooves 27.

Then, the commutator 10 is pressed into the shaft 30 and the commutator 10 is inserted into the shaft 30 until the cylindrical portion 11 of the commutator 10 abuts against the cylindrical portion 21 of the holder 20.
Press-fit. As a result, the commutator 10 is
And at the same time, it is fixed integrally with the outer peripheral side surface of the holder 20.

At the time of this press-fitting, the winding 40 caught by the engaging groove 27 is covered by the extension 16 of the segment 13, but is wound by the plurality of small projections 17 formed on the extension 16. The film 40 is destroyed, and the segment 13 of the commutator 10 and the winding 40 are connected. That is, the terminal of the winding 40 is rubbed with the small protrusion 17 to break the film of the winding 40, thereby achieving electrical conduction. This completes the assembly of the commutator device S.

In the embodiment shown in FIGS. 3 to 8, it is a perspective view for explaining the combination of the holder 20 and the segment 13 of the commutator 10 in the embodiment shown in FIG. In the following embodiments, the same reference numerals are given to the arrangements, members, and the like, as in the above-described embodiments, and the description thereof is omitted.

The embodiment shown in FIG. 3 shows an example in which the small projections 17 formed on the extending portions 16 of the segments 13 are sharp projections facing inward in the circumferential direction. Of the holder 2 and the recess 2 of the holder 20
7 shows an example in which the width of each of 7a and 27b is increased. That is, in this example, when the commutator 10 is press-fitted into the shaft 30, the coating of the winding 40 wound around the holder 20 is rubbed by the small projections 17 facing the inside, and the coating of the winding 40 is broken. In addition, electrical conduction can be achieved, and the wire 40 having a large wire diameter can be used.

FIG. 4 shows a third embodiment of the present invention, and is a partial perspective view for explaining a combination of the holder 20 and the segment 13 of the commutator 10 similar to FIG. In each of the embodiments, the example in which the partition portion 29 is formed between the engaging groove 27 and each of the above-described embodiments has been described. However, the present example illustrates an example in which the partition portion 29 is not formed.

That is, the width of the extending portion 16 is set so that the adjacent extending portion 16 does not come into contact, and a notch recess 18 is formed within this width. 17 is formed. Therefore, the winding 40 wound in a loop around the outer peripheral side surface of the holder 20 is
Are pinched from both sides, and at this time, the small projections 17 are rubbed and the film of the winding 40 is broken, so that electrical conduction can be achieved.

FIG. 5 shows a fourth embodiment of the present invention, and is a perspective view for explaining a combination of the holder 20 and the segment 13 of the commutator 10 similar to FIG. 3, and shows the embodiment shown in FIG. In this embodiment, an engagement protrusion 28 is formed on the upper surface of the holder 20, and an engagement groove 27 that is continuous from the shaft side half circumference to the side surface of the engagement protrusion 28 is formed. In the present embodiment, the shape of the engagement groove 27 can be adapted to the wire diameter of the winding 40, and the terminal of the winding 40 is housed in the engagement groove 27.

FIG. 6 shows a fifth embodiment of the present invention, and is a partial perspective view for explaining a combination of the holder 20 and the segment 13 of the commutator 10 similar to FIG. This shows an example in which one small projection 17 is formed. That is, the holder 20 is formed with an engagement groove 27 which is aligned with the small protrusion 17 formed inside the extension 16, and the terminal of the winding 40 is arranged and assembled in the engagement groove 27. is there.

FIG. 7 shows a sixth embodiment of the present invention, and is a partial perspective view illustrating a combination of the holder 20 and the segments 13 of the commutator 10 similar to FIG. In this example, a small projection 17 facing the extension 16 itself is formed,
The coating of the winding 40 is broken by the opposed small projections 17 so that electrical conduction can be achieved.

That is, as shown in FIG. 7, a notch concave portion 18 having a predetermined width is formed in the extension portion 16, and a plurality of small protrusions are formed radially in a range on both sides of the notch concave portion 18. 17 are formed. Further, an L-shaped small projection opposing member 19 is formed so as to cover the cutout concave portion 18, and the small projection opposing member 19 is similarly formed with the small projection 17 facing the small projection 17. .

On the other hand, the holder 20 is formed with an engaging groove 27 for hooking the winding 40 in a loop shape as shown in FIGS. A groove 27d is formed between the engagement grooves 27.

According to this embodiment, when the commutator 10 is assembled, the winding 4
0 is a small protrusion 1 formed on the extension 16
7, the extension 16 is sandwiched from both sides,
At this time, the small projections 17 are rubbed and the film of the winding 40 is broken, so that electrical conduction can be achieved.

FIG. 8 shows a seventh embodiment of the present invention, and is a partial perspective view illustrating a combination of the holder 20 and the segments 13 of the commutator 10 similar to FIG. In the present embodiment, in addition to the embodiment shown in FIG. 2, a cut-and-raised portion 51 is formed inside the extended portion 16 and at the same time, the cut-and-raised portion 51 is formed.
The concave portion 52 on the outer peripheral side surface of the holder 20 is
It is formed between 7a and 27b. According to this example, the connection between the commutator 10 and the holder 20 can be further strengthened.

FIGS. 9 to 12 show various embodiments showing the connection between the holder 20 and the shaft 30. FIG. In these embodiments, the same reference numerals are given to the same arrangements and members as those in the above-described embodiments, and the description thereof will be omitted.

FIG. 9 is a perspective view showing a state in which the holder 20 and the shaft 30 are integrally formed. In each of the above-described embodiments, an example in which the holder 20 is press-fitted into the shaft 30 is shown. And the holder 20 can be integrally formed. When the holder 20 and the shaft 30 are integrally formed as in this example, the work of press-fitting the holder 20 can be omitted, and the working efficiency can be improved.

FIG. 10 is a perspective view showing a state in which the holder 20 and the shaft 30 are assembled. In this embodiment, engagement protrusions 31 are formed at predetermined intervals on the upper end of the shaft 30. An engagement recess (not shown) that fits with the engagement projection 31 of the shaft 30 is formed in the shaft 30. Then, the engagement protrusion 31 of the shaft 30 and the engagement recess of the holder 20 are engaged with each other and assembled.

FIG. 11 is a perspective view showing another embodiment showing a state in which the holder 20 and the shaft 30 are assembled. In this embodiment, an example in which connection unevenness is formed between the support portion and the shaft 30 is shown. It is shown.

FIG. 12 is a perspective view showing still another embodiment in which the holder 20 and the shaft 30 are assembled. This example shows an example in which a groove 30 is formed in the shaft 30.

With this configuration, various commutators 10 can be configured only by changing the segments 13, and the cylindrical portion 11 of the commutator 10 can be shared.

In the conventional welding welding process, it is necessary to perform welding for each slot or a plurality of slots. However, in the above-described embodiment, since only the press-fitting of the commutator 10 is required, the time can be reduced. For example, the joining time between the commutator 10 and the winding 40 can be reduced from the conventional 6 seconds to about 2 seconds, and the production efficiency can be improved.

Further, the yield can be improved when manufacturing the ring of the commutator 10. For example, when copper is used, there is no need for plating, and a significant cost reduction can be achieved. Further, since no pressing force or heat is applied unlike fusing, stable quality can be obtained without deformation or cracking of the resin portion of the commutator 10.

Since it is not necessary to provide a riser in the commutator 10, the length of the commutator 10 can be reduced and the outer diameter of the commutator can be reduced, so that the size can be further reduced.

[0058]

Since the present invention is constructed as described above, it is possible to eliminate the riser, fusing, soldering and the like of the commutator which have been conventionally required. And the number of steps can be reduced. In particular, since a riser is not required, the number of segment processing steps is reduced.

Since the width of the winding engaging recess can be formed from a wide state to a narrow state, it is not affected by the wire diameter of the winding.
A wide range of windings can be handled, and the number of conventional pre-processing steps can be reduced.

As described above, the commutator cylindrical portion can be shared regardless of the wire diameter, and troublesome soldering can be omitted.
The number of manufacturing steps can be reduced, and parts can be shared.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a commutator device according to the present invention, and is a perspective view illustrating assembling of a holder and a commutator.

FIG. 2 shows a second embodiment of the present invention, and is a perspective view illustrating the assembling of a holder and a commutator.

FIG. 3 is a partial perspective view illustrating a combination of a holder and a commutator segment according to the embodiment shown in FIG. 2;

FIG. 4 is a partial perspective view showing a third embodiment of the present invention and illustrating a combination of a holder and a commutator segment similar to FIG.

FIG. 5 is a partial perspective view showing a fourth embodiment of the present invention and illustrating a combination of a holder and a commutator segment similar to FIG. 3;

FIG. 6 is a partial perspective view showing a fifth embodiment of the present invention and illustrating the same combination of a holder and a commutator segment as in FIG. 3;

FIG. 7 is a partial perspective view showing a sixth embodiment of the present invention and illustrating a combination of a holder and a commutator segment similar to FIG. 3;

FIG. 8 is a partial perspective view showing a seventh embodiment of the present invention and illustrating a combination of a holder and a commutator segment similar to FIG. 3;

FIG. 9 is a perspective view showing a state where the holder and the shaft are integrally formed.

FIG. 10 is a perspective view showing a state where the holder and the shaft are assembled.

FIG. 11 is a perspective view showing a state where the holder and the shaft are assembled.

FIG. 12 is a perspective view showing a state where the holder and the shaft are assembled.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Commutator 11 Cylindrical part 12 Through-hole 13 Segment 14 Striation line 15 Insulation part 18 Notch recessed part 19 Small protrusion opposing member 20 Holder 21 Cylindrical part 22 Engagement part 23 Depression 24 Convex part 25 Support part 26 Through-hole 27 Engagement groove 27a, 27b Recess 27c Curve 27d Groove 28 Engagement projection 29 Partition 30 Shaft 31 Engagement projection 33 Groove processing 40 Winding 51 Cut-and-raised part 52 Recessed part S Commutator device

Claims (6)

(57) [Claims] 1. A commutator comprising a segment having no riser attached to an outer periphery of a cylindrical portion, and a commutator device comprising a combination of the commutator and a holder, wherein the holder comprises: a cylindrical portion; An engaging portion of a winding provided around a part of the surface of the portion, wherein the segment has a sharp surface that engages with the engaging portion of the winding via the winding when the segment is mounted. A plurality of small projections are formed, the winding is wound around the engaging portion of the winding, the holder and the segment of the small projection forming portion are assembled, the winding film is broken by the small projection, and the segment is wound. A commutator device characterized in that the wire is made conductive. 2. An engaging portion of a winding provided around a part of a surface of a cylindrical portion of the holder, the engaging portion comprising a concave portion formed at a predetermined interval in an upper portion of the cylindrical portion. The commutator device as described. 3. A groove for engaging a winding provided on an outer periphery of a side surface of the cylindrical portion with a loop is formed in an engaging portion of the winding provided around a part of the surface of the cylindrical portion of the holder. 2. The small projection formed on the segment is formed at a position matching the winding position of the winding of the groove.
The commutator device as described. 4. An engagement portion of a winding provided around a part of the surface of the cylindrical portion of the holder includes a convex portion formed at an upper portion of the cylindrical portion at a predetermined interval and a cylindrical portion from both sides of the convex portion. The commutator device according to claim 1, further comprising a groove provided on the outer periphery of the side surface of the first member to engage the winding in a loop shape. 5. The apparatus according to claim 1, wherein the holder is connected to the shaft by a connecting means.
5. The commutator device according to claim 4. 6. The apparatus according to claim 1, wherein the holder is formed integrally with a rotating shaft constituting a rotor.
The commutator device according to any one of claims 2, 3, and 4.