KR970006108B1 - Armature - Google Patents

Abstract

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Description

Armature

1 is a perspective view of a commutator piece and a commutator support in one embodiment of the armature according to the invention.

2 is a partial plan view of the assembled armature partially cut to illustrate the construction of the housing of the commutator support.

3 is a development plan view of the commutator piece and the terminal in FIG.

4 is an enlarged partial view of the terminal shown in FIG.

5 is a developed plan view of the other commutator pieces and the terminal coupled state.

FIG. 6 is a perspective view of the commutator piece when the deployment form of FIG. 5 is bent. FIG.

7 is an exploded plan view of another commutator piece and a terminal in a coupled state.

* Explanation of symbols for main parts of the drawings

8: armature thin film layer 10: body

12: axis 14: commutator support

16 spacer 18 housing

19: sleeve part 20: side wall

22: end wall 24: cover

25: wing 26: opening

28: boss 30, 48: slot

34: commutator 36: terminal

42,43: protrusion 44: latch

45, 52: arm 46: cutting part

50: locking jaw 54: center

62: cutter 64: cutting blade

66: round part 68: narrow part

70: recess

The present invention relates to an armature for use in an electrical device. It is generally practiced to use a commutator that cooperates with a brush gear to connect the armature of the electrical device to an external circuit. In the manufacture of such an armature, it is necessary to provide an electrical connection between the coil armature coil and the commutator.

In British Patent No. 2,128,818B, thermal adaptation is avoided influencing the connection, and by inserting a coil with an insulating cover into a slot narrower than the coil diameter, a metal-to-metal contact can be established between the terminals of the coil and the armature termination. It describes the connection between the armature coil and the armature termination using the principle of Insulation Displacement.

The commutator described in British patent 2,128,818B includes a barrel type, ie a partially cylindrical commutator piece that is attached onto a cylinder commutator base.

When using high energy magnets, it is possible to reduce the frame side area of an electrical device, for example an electric motor, without reducing the power output.

Brush gears used in barrel-type commutators are generally attached to the commutator either radially or tangentially. Brush brushes therefore become a limiting factor in reducing frame size.

The present invention has been made in view of the above, and an object of the present invention is to reduce the lateral area of a motor without a decrease in power output when using a high energy magnet in an electric motor, and also between the armature coil and the commutator. The connection is simple and inexpensive, and furthermore, by not using heat, it provides an armature that does not twist the body.

In the armature comprising a coil having a connecting portion coated with an insulating material, a commutator support, and three or more commutator pieces respectively positioned on the commutator support and connected to the connecting portion of the coil, the commutator The support supports the commutator pieces in a single plane perpendicular to the armature axis, each commutator piece comprising a full-chain terminal with slots having two legs open and a slot for sandwiching the connection therebetween, wherein the slot is connected. It has two cutting edges for cutting the insulation of the connecting part to make electrical contact between the part and the terminal, and the slot has two legs and the connecting part is sandwiched between the connecting part and the terminal. It is characterized by an armature arranged to maintain electrical contact.

Brushes of this arrangement can be axially supported above the commutator and supported in a cage at one end of the motor. Therefore, brush gears are not forced to reduce the frame side area of the electrical device.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The armature shown in FIG. 1 thru | or FIG. 4 has the armature thin film 8 attached to the armature thin film layer 8 and the shaft 12 firmly. The body 10 is integrally molded with plastic and may be formed of aluminum coated with a protective film. The five housings are disposed at equal intervals around the commutator support 14, the spacer portion 16, and the commutator support 14. And 18, the sleeve portion 19.

Spacers 16 allow the housing 18 to be spaced apart from the armature thin film layer 8, each housing 18 being used to create a connection between each part of the armature coil and one of the five commutator pieces. The commutator support 14 has a flat commutator support surface in a plane perpendicular to the axis of the armature.

2 shows a cross section of the housing 18. The housing 18 has a side wall 20, an end wall 22, and a cover 24. The end wall 22 is adjacent to the spacer 16, and an opening 26 facing away from the spacer end of the body 10 is formed by the walls 20, 22 and the cover 24. The side wall is parallel to the longitudinal axis of the body 10. Wings 25 protrude radially from housing 18 to neutralize the flow of air that intersects the armature.

The boss 28 protrudes from the inner surface of the end wall 22 to the center and extends about half the length of the side wall 20 toward the housing 18 end. The boss 28 extends parallel to the longitudinal axis of the body 10 and is connected to the body 10 by an end wall 22.

Each side wall 20 of the housing 18 has a slot 30 in which rectification of the housing 18 extends parallel from the end to the body 10 to a length ending with the free end level of the boss 28. . A portion 32 of the armature coil passes through the slot 30 of the housing 18 and lies at the end of the boss 28.

The outer surface of the side wall 20 may be inclined to allow the coil portion 32 to easily enter into the slot 30.

The commutator piece 34 and terminal 36 combined in FIGS. 1 and 3 are well illustrated.

3 shows the state of engagement as a development. The commutator piece 34 is in an annular piece shape and has two edges 38 and 39 and a radially extending edge 40 and 41 which are defined by concentric arcs.

The reduced width protrusion 42 protrudes forward from the edge 39, and the two protrusions 43 protrude radially from the edge 38. Each protruding piece 42 and 43 has a latch 44.

At the rear end, the commutator piece 34 is connected to the terminal 36 by an arm 45. The terminal 36 is a rectangular shape, which is a shaft in which a line which bisects the commutator piece 34 and an axis corresponding to the longitudinal axis of the arm 45 are caught. The terminal 36 has a central cutout 46, which is symmetrical about the long and short axes of the terminal 36.

The cut portion 46 is reduced from the widest width of the center of the terminal to a slot 46 in the form of a key hole forming both ends of the cut portion 46. The triangular engaging jaw 50 is formed on both sides of the short axis of the terminal 36 along the edge farthest from the commutator piece 34.

As shown in FIG. 1, the commutator piece 34 is bent 90 ° with respect to the arm 45. The protruding pieces 42 and 43 protrude at right angles to the commutator piece 34 and extend in a direction parallel to the longitudinal axis of the arm 45. The terminal 36 is erected and bent straight against the arm 45 and bent 90 ° with respect to the central portion 54 of the terminal of the arm 52 of the terminal 36 including each keyhole slot 48. All.

Thus, the arms 52 extend parallel to each other and to the longitudinal length of the arm 45 and extend along its length.

Although not shown, the free ends of the terminals 36 may be bent to be inclined toward each other when the arms 52 are bent to be parallel to each other.

4 shows an enlarged half of the terminal 46 of FIG. The portion 58 indicates that bending occurs between the central portion 54 and the arm 52. Site 60 also indicates that there may be bending between arm 52 and far end 56. However, the main purpose of FIG. 4 is to describe the detailed configuration of the keyhole slot 48.

This is a picture to ensure contact with the armature coil part 32. The decrease in width from the center of the cut portion 46 to the beginning of the keyhole slot 48 provides a funnel to guide the arm 52 over the coil portion 32.

Two cutters 62 are located with cutting edges 64 protruding into the slot 48 at a short distance into the keyhole slot 48. The cutter 62 is formed away from the arm 52, but may also partially diverge from one another such that the cutting blade 64 is resilient into the slot 48.

The back side of the cutters 62 narrower along the slot 48. The rounded end 66 of the slot 48 allows the edge of the slot 48 to have some resilience to isolation by the connection 32.

2 shows the commutator piece 34 and the terminal 36 positioned on the body 10. Terminal 36 enters housing 18 and passes boss 28 to central portion 54 of terminal 36.

Coil portion 32 is guided into keyhole slot 48. As the terminal 36 passes through the coil 32, the cutting blade of the cutter 62 cuts the insulation of the coil 32, and as the terminal 36 enters further, the narrow portion of the slot 48 ( 68) Coil 32 is pushed into it.

Due to the light elasticity formed by the rounded portion 66 and the relative size of the coil and the portion 68, the arm 52 is coil 32 with an extra spring tension that maintains high contact pressures to ensure reliable long-term connection. It can continue to support.

The locking jaw 50 holds the terminal 36 in the housing 18 by engaging the cover 24 of the housing 18. Additional holding force is provided by the contact between the central portion 54 of the terminal 36 and the boss 28.

The arm 52 of the terminal 36 is bent at an angle slightly less than 90 ° from the central portion 54 to provide the holding force of the terminal 36 against the side wall 20 of the housing 18. Better maintenance is achieved when the width of the terminal 36 fits snugly into the internal dimensions of the housing 18.

The plate commutator support 14 is formed with a recess 70 for receiving the protruding pieces 42 and 43 when the terminal 36 enters the housing 18. The latch 44 of the protruding pieces 42 and 43 is inserted into the body 10 so that the protruding pieces 42 and 43 remain firmly caught in the recess 70.

The commutator piece 34 rests on the support 14 by the interaction of the terminal 36 with the housing 18 and the interaction in the recess 70 between the protrusions 42, 43 and the catch 44. Stay tight. Since the commutator piece 34 is firmly held on the support 14, there is no fear of separation even at a high speed of acceleration.

In the assembly of the armature, the body 10 lies on an armature shaft 12 having a spacer 16 with respect to the base of the thin film layer 8. The lead wire of the armature coil is inserted into the housing 18 by placing the end of the coil 32 in the slot 30 formed in the side wall 20 of the housing 18. The coil 32 is drawn into the housing 18 until it is placed in the boss 28.

To this point, the first armature coil is wound. When the first coil winding is finished, the armature is indexed, and the coil 32 is placed in the same manner in the next housing 18 without breaking.

This process is repeated until all coils have been wound, with the ends of the coils placed in the slots 30 of the first housing 18 until the coil windings are adjacent to the end of the leader line placed on the boss 28 at the beginning of the operation. Is pushed. The coil 32 is then broken and the armature is removed from the coiling machine.

The body 10 has a wound portion 32 comprising an insulated coil that lies in each housing 18. Each wound portion 32 is tensioned and pulled firmly against each boss 28.

Each coupled commutator piece 34 and terminal 36 are provided for insertion into the body 10. The commutator piece 34 then moves toward the support 14 in a direction parallel to the armature, so that the terminal 36 is inserted into each housing 18 and the protruding pieces 42 and 43 are provided with respective recesses ( 70).

When the terminal 36 approaches the wound portion 32 retained in the housing 18, the slot 48 moves over the wire 32. The cutting blade of the cutter 62 cuts the insulation of the coil 32 which deforms when the slot moves over the coil 32. Thus, a close contact of metal to metal is made between the oil 32 and the terminal 36. The arm 52 of the terminal 36 acts as these two cantilever springs, exerting a constant pressure on the coil 32.

The face commutator under these conditions is axially supported above the commutator and is used by contact by a brush supported in a cage at one end of the device. This is especially true for microhorsepower P.M.D.C. This is useful for motors and to reduce the motor aspect for the same power output when using high energy magnets.

The connection between the armature coil and the commutator is simple and inexpensive. There is no need to adapt the heat and there is no risk of the body 10 being warped by the heat.

The wound coil does not deteriorate and oxidation problems can be avoided. Since no solvent is used, there is no chemical reaction or corrosion caused by the connection.

The coil of the armature is a single successive coil in which the wound coil connected to each coil is broken so that there is no risk of loosely drawing and affecting the connection of each coil. Thus, the risk of wearing the armature's coil when the motor is running is greatly reduced.

The commutator piece 34 is guided after the coil winding of the armature is completely completed, thereby greatly reducing the risk of the coil being accidentally peeled off due to corrosion in the metal component while the coil is wound.

The commutator pieces shown in FIG. 5 and FIG. 6 are different from those in the above embodiment, and are connected to mutually opposite edges of the arm 45, as can be seen in FIG. It has two integral terminals 36a and 36b having a longitudinal axis parallel to the longitudinal length of the < RTI ID = 0.0 >

Terminals 36a and 36b can be bent in the form shown in FIG. 6, which is arranged just below commutator piece 34. As shown in FIG. In this case, a housing that accepts the terminal should be formed in the commutator support 14.

By doing so, it is possible to bring about an effect of reducing the appetizer diameter of the body (10).

Moreover, the coils are bifurcated and sandwiched in all directions to ensure good electrical contact between the coils and the commutator pieces.

In some instances, it is desirable for the armature coil to assemble the commutator before winding. In this case, as represented in FIG. 7, the combined commutator piece 34 'and the terminal 36' can be reused.

In this case, the slot 48 is replaced by the slot 48 'opposite the end of the terminal 36', and the boss 28 in the housing 18 is omitted. Terminal 36 'is inserted into housing 18, and wire 32 is then drawn into slot 48', preferably during the armature coil winding process. The slot 30 in the housing ends shortly at the round end of the slot 48 'to protect the coil 32 from being drawn into the round end.

This arrangement allows the commutator to be preassembled prior to coil winding, and the commutator piece can be insulated from the armature thin film layer and grounded flat.

In this arrangement, in practice, some support for the terminal 36 'is desired but all housings 18 may be omitted.

Various modifications are possible without departing from the scope of the invention as defined in the claims.

For example, the commutator piece may be attached to the support 14, and the spacer 16 may include a configuration that cooperates with each other as a complementary configuration on the coil stack, thereby preventing the angle change between the body 10 and the armature stack. It becomes possible.

The coiled armature coil's wire can be formed of a metal such as aluminum instead of copper, and the various sizes of the wire can be adjusted according to the change in the allowable diameter of the wire along the slot of the terminal arm 52.

In addition, teeth may be formed at the edge of the slot 48 instead of the cutter 62. The terminal 36 may have only a single arm, and the locking jaw may be formed at the edges of the protrusions 42 and 45 to improve the fit between the protrusions and the support 14.

Finally, an annular varistor or resistor element may be attached over the housing 18 for electrical connection to the terminal 36.

Claims (9)

In an armature comprising a coil having a connection portion coated with an insulator, a commutator support, and three or more commutator pieces situated on the commutator support and connected to the connection portion of the coil, respectively, the commutator support being the armature shaft. A commutator piece supporting a commutator piece in a single plane perpendicular to the cross section, each commutator piece comprising a full-chain terminal with two legs open and a slot for sandwiching the connection therebetween, wherein the slot is between the connection part and the terminal. It has two cutting blades for cutting the insulation of the connecting part to make electrical contact with the slot. The slot has two legs and the connecting part is sandwiched between them to maintain the electrical contact between the connecting part and the terminal. Armature arranged to 2. The armature of claim 1, wherein the terminal has two parallel arms, each arm having two legs apart and a slot for sandwiching the connection therebetween. 3. The armature of claim 2 wherein the two arms are arranged in parallel and are connected in cross sections. The armature according to any one of claims 1 to 3, wherein the armature includes three or more housings each formed with housing recesses for receiving the terminals of the commutator pieces. 5. The armature of claim 4, wherein a locking jaw is formed in the terminal for holding the terminal firmly in the housing. A support according to claim 4, wherein each housing has a means for positioning said connecting portion of said coil with respect to a housing recess, each commutator piece being arranged so that it can be positioned on said commutator support in a single translational movement, said commutator piece being a support. Guided overcoming against, and at the same time the cutting edge cuts off the insulation of the connection located in relation to the housing, the slot being two legs apart and connected to maintain electrical contact between the connection and the terminal. Armature sandwiching the part between. The armature of claim 1 wherein each commutator piece has at least one protrusion piece that cooperates with the protrusion piece recess in the commutator support such that the commutator piece is positioned and held above the armature. 8. The armature of claim 7, wherein each commutator piece has at least three said protruding pieces at two places on the outer edge and one on the inner edge. 10. The armature of claim 9, wherein the protruding piece or each protruding piece protrudes perpendicularly or approximately perpendicularly to the single surface.

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