CN1152811A

CN1152811A - Method for making ring of commutator and commutator using it

Info

Publication number: CN1152811A
Application number: CN96114580A
Authority: CN
Inventors: M·施威尔德特勒; F·贝伦斯; H·戴尔林; S·奥森科佩
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 1995-11-25
Filing date: 1996-11-25
Publication date: 1997-06-25
Anticipated expiration: 2016-11-25
Also published as: GB9623259D0; CN1068979C; KR100407878B1; GB2307599A; FR2741753B1; KR970031175A; IT1286061B1; DE19543998B4; JPH09161941A; FR2741753A1; GB2307599B; ITMI962242A1; DE19543998A1

Abstract

The invention relates to a process for manufacturing a commutator ring for a commutator in an electrical machine, in which process the segments of the commutator ring and fastening means for the segments are shaped out of a strip material, and a selectable number of segments are then closed to form the commutator ring. Provision is made for the fastening means to be constructed as an interrupted dovetail profile extending in the axial direction of the segments.

Description

Make the method for commutator ring and adopt the commutator of this commutator ring

The present invention relates to a kind of method of making the commutator ring of commutator, in insulator, form the thin slice of commutator ring and the securing member of thin slice with band, the thin slice of then selecting some surrounds commutator ring, also relates to a kind of commutator that this commutator ring is housed.

As everyone knows, commutator ring is made by the band of the compacting of an annular commutator special use of what is called, sometimes this is a kind of endless belt without a head of shaping, its final width is consistent with the axial length of commutator, utilize forming tool to form groove, so each thin slice only interconnects by boss perpendicular to the activity direction of belt.Correspondingly, the correlated measure of the thin slice of the thin slice quantity of commutator ring and the continuous band that has been shaped is out of gear mesh, and commutator ring is a closed loop.For the isolation between stable and each the unit thin slice that guarantees commutator ring, on commutator ring, should imbed the metal wheel hub made from insulating material at least.

The finished product of commutator should prevent moving axially of these thin slices, and for this reason, people adopt the thin slice securing member that embeds in the insulating material.

DE-AS12 18053 as an existing case introduction a kind of commutator that has commutator ring, wherein on thin slice, shear and form contrary hook.The defective of making is like this, the strip intensity of the commutator ring of the Shear Cut Pin of contrary hook is weak trough of belt.

US-PS5204574 also discloses a kind of commutator ring, and it has the axially extended swallow-tail form cross section along thin slice.By this known swallow-tail form section, guaranteed the reliability of each thin slice of making progress in the footpath of commutator, can not get rid of the existence of commutator offset phenomena vertically.

The superiority that method of the present invention is brought is, except keeping enough tab strength, can also guarantee the secure fixation of thin slice in insulation.In the present invention, securing member is made the swallow-tail form section formula along the axially extended interruption of thin slice, but can adopt the method step of single simple realization that wafer processes is shaped like this, can guarantee that simultaneously these thin slices have in the opposing insulation radially and/or the characteristic of the reliable location of axial force.The swallow-tail form section of be interrupted arranging vertically especially can help to stop because the axial displacement that the cutting force that produces vertically between the securing member of thin slice and insulating material produces thin slice.

Useful design indicates of the present invention is in the listed feature of dependent claims, and the present invention also comprises the commutator that the commutator ring that adopts the inventive method manufacturing is housed.

Further specify embodiments of the invention below with reference to the accompanying drawings.

Accompanying drawing is:

Fig. 1: the cross section view of commutator ring;

Fig. 2: the vertical view of commutator ring end face;

Fig. 3: the enlarged partial view of commutator ring;

Fig. 4: the forming machine of making securing member of the present invention;

Fig. 5: the production process schematic diagram of securing member of the present invention;

Fig. 6: the commutator that the commutator ring of Fig. 1 is housed.

In Fig. 1 and 2, with the whole commutator ring of label 10 representatives.Commutator ring is made of a plurality of thin slices that are circular layout 12, and these thin slices have L shaped section.The lateral surface of the long leg 14 of thin slice 12 constitutes the acting surface of commutator ring 10.The short-leg 16 of thin slice 12 stretches out from thin slice 12.The securing member 18 that has thin slice 12 on the inboard of supporting leg 14 utilizes these securing members that insulating part shown in Figure 6 11 is fixing, and insulator also can be used as the wheel hub of commutator ring 10 simultaneously.As shown in Figure 6, so the commutator 13 that forms is installed on the rotor shaft of motor, then contacts with the winding of rotor.

In Fig. 3, showed commutator ring with the cutaway perspective form of having amplified.Supporting leg 16 as connecting terminal here omits, because also will thoroughly discuss about the fabrication portion of securing member 18 afterwards: can be known by Fig. 3 and to find out that securing member 18 is made with supporting leg 14 integral body of thin slice 12.The section of securing member 18 is the dovetail shape that radially inwardly stretch into.From the Fig. 3 that amplifies, each thin slice 12 layouts that be spaced from each other, and not directly contact each other, insulator 11 fillings that its gap 20 adopts insulating material to make have electric insulation each other with assurance thin slice 12.Securing member 18 also embeds and claim swallow-tail form part 22 in the insulating material simultaneously, these swallow-tail form parts 22 along thin slice 12 vertically, just commutator ring 10 axially on be interrupted.The swallow-tail form part 22 of these interruptions along thin slice 12 vertically on alternately arrange by segmentation 24 with swallow-tail form part 22 and the segmentation 26 that do not have swallow-tail form part 22, the selection of these

segmentations

24 and 26 number is relevant with the length of thin slice 12.According to first embodiment, each thin slice 12 comprises a segmentation 24 and segmentation 26, and among another embodiment, then alternately arranges a plurality of segmentations 24 and 26.In yet another embodiment, on the end regions of the supporting leg 14 of each thin slice 12, respectively form a segmentation 24 that has swallow-tail form part 22, and between this end regions stage casing, form segmentation 26 (see figure 5)s.

Thin slice 12 forms axial end 28 by segmentation 24 alternately and 26 transition positions at them, and this end face is the part of securing member 18.

Because the acting in conjunction of swallow-tail form part 22 and axial end 28 has realized the secure fixation of thin slice 12 in insulating material.The back section (Hinterschnitt) of swallow-tail form part 22 upwards provides support for the footpath of commutator ring 10, end face 28 for commutator ring 10 axially on support is provided.

To further introduce the manufacturing of commutator ring 10 according to Fig. 4 and Fig. 5 below.Fig. 5 represents each manufacturing step of thin slice 12.For the sake of simplicity, in Fig. 5, only show the supporting leg 14 of thin slice 12.

Thin slice 12 is by type band 30 press formings, and this type band is generally copper strips.In the first step of this method, utilize a forming machine to produce some breach 32 perpendicular to type band 30, these breach 32 of arranging that are spaced from each other are the blank 34 of thin slice 12.These blanks 34 only interconnect by boss 36.Utilize forming machine processing to obtain breach 32, and the section of blank 34 is trapezoidal, so its side 38 has a selectable angle.In Fig. 5, only adopt the forming machine 40 of an arrow representative vertically to clamp type band 30.

In next method step, on blank 34, suppress swallow-tail form part 22.Here (promptly in the side 38) gone up and placed tooth jaw type stamping machine 42 on the both sides at the back side of blank 34.As can be seen from Figure 5, extrude such profile along the length (being on the width of type band 30) of thin slice 12, promptly produce the segmentation 26 that has the segmentation 24 of swallow-tail form part 22 and do not have the swallow-tail form part with the represented stamping machine 42 of arrow.Stamping machine 42 can have a relevant pitch, and it has the jaw 46 that side 38 in clamping, and these jaws layout that is spaced from each other is laid with respect to two sides 38 of thin slice 12 simultaneously.Corresponding to the pitch and the spacing of jaw, segmentation 24 that replaces and 26 dimension adjustable.After punching course finishes, the thin slice 12 (particularly supporting leg 14) that obtains having Fig. 2 and 3 described structures, wherein the same parts of representing with same label no longer is repeated in this description here.

After punching press formed thin slice 12, these thin slices respectively were connected by boss 36, select the quantity of required thin slice 12 from finished parts, and it is cut down from type band 30, surround a commutator ring 10.The thin slice 12 that will have securing member 18 (foregoing structure) embeds insulating material.Then thin slice 12 is tightened operational example such as transition by one and reverses and be separated from each other from the outside, removes to connect boss 36.So far obtain commutator as shown in Figure 6.

In Fig. 4, adopt the punching press of the stamping machine 42 of Fig. 4 to obtain swallow-tail form part 22.This specification will not be described in detail for stamping machine 42 mechanical connecting element and driver parts own.Stamping machine 42 has a feeder 44, and the type band 30 that has breach 32 is in advance sent into the stamping machine from feeder.Stamping machine 42 has the jaw 46 that can swing installation, and they are with the interlocking in the side 38 of blank 34 simultaneously of the schematic diagram shown in Fig. 5.The swing of the jaw 46 of the common feed of teeth formula is adjustable, thereby makes the swallow-tail form part 22 with swallow-tail form section.

Adopt manufacture method of the present invention can produce commutator ring 10, the thin slice 12 of commutator ring 10 particularly, the section of these thin slices 12 does not affect adversely because of the shaping of securing member 18.Form swallow-tail form part 22 by punching press, this process only material is squeezed, and can't cause adverse effect to the entire profile intensity.Simultaneously can adopt a simple actual procedure of processing to make securing member, it can guarantee simultaneously from radial and axial each thin slice of fixing.Because thin slice 12 has the

segmentation

24 and 26 of mutual arranged alternate, thereby has guaranteed the intensity of thin slice 12, allow crooked and curl to make desired commutator ring 10.

Claims

1. make the method for the commutator ring of engine commutator, in insulator, form the thin slice of commutator ring and the securing member of thin slice with band, the thin slice of then selecting some surrounds commutator ring, it is characterized in that described securing member (18) is made into the swallow-tail form part (22) that separates along the interruption of the axial stretching, extension of thin slice (12).

2. according to the method for claim 1, it is characterized in that discontinuous swallow-tail form part (22) is formed on the thin slice (12) in the course of processing.

3. according to the method for one of aforementioned claim, it is characterized in that swallow-tail form part (22) is made from the forming machine (42) that side direction contacts the side (38) of thin slice (12) by at least one.

4. according to the method for one of aforementioned claim, it is characterized in that forming machine (42) contacts simultaneously on the two relative side (38) of a thin slice (12).

5. according to the method for one of aforementioned claim, it is characterized in that, make the tooth-like coacting jaw (46) of at least two forming machines (42) head on described side (38) by a leverage and move.

6. according to the method for one of aforementioned claim, it is characterized in that a plurality of jaws (46) are along the layout that axially is spaced from each other of thin slice (12), move the side (38) that heads on thin slice (12) simultaneously.

7. according to the method for one of aforementioned claim, it is characterized in that, utilize the adjusting of the axial spacing of jaw (46), adjust the interruption degree of swallow-tail form part (22).

8. the commutator that has the motor of commutator ring, this commutator ring is made of the thin slice of adjacent arrangement on the circumference, and these thin slices are fixed in the insulator (11) by a securing member, it is characterized in that, and securing member (18) is to be interrupted the swallow-tail form part (22) that is shaped.

9. commutator according to Claim 8 is characterized in that, the securing member (18) of each thin slice (12) has at least one segmentation that has swallow-tail form part (22) (24) and a segmentation (26) that does not have swallow-tail form part (22).

10. according to the commutator of one of aforementioned claim, it is characterized in that the segmentation of thin slice (12) (24 and 26) is staggered separately transition on axial end (28).