DE2612904A1 - DEVICE FOR PLACING COILS AND METHOD OF SETTING UP THE DEVICE FOR PLACING COILS IN CORES WITH DIFFERENT AXIAL LENGTHS - Google Patents

Description

Kaiserstr. 41 Πγ rar nnf Hr »r«; t «v-hnl ^ r 6 Frankfurt / Main 1, March 25, 1976

Ur. rer. nar. riorsr ocnuier «κομ« *** »vo / rf PATENT ADVERTISER _{phone {0611)}

2 61 2 9 ü 4 ^Telex: ο ⁴ - ^{16759 m} ° p ^{at d}

Postal check account: 282420-602 Frankfurt / M.

Bank account: 225/0389

Deutsche Bank AG, Frankfurt / M.

3842-O3-AO-4557

GENERAL ELECTRIC COMPANY

1 River Road
SCHENECTADY, NY / USA

Apparatus for arranging coils and a method of setting up the apparatus for arranging coils in cores of different sizes axial lengths

The invention relates generally to new and improved devices for placing coils in axially extending grooves of cores with different chosen axial lengths. The invention also relates to a method for setting up or Conditioning such a device.

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Machines for axially arranging coils along axially extending Magnetic core slots are mainly used in small and very small induction motors with distributed turns. There are a number of different patents showing and describing details of bobbin pulling devices. An example For this purpose, US Pat. No. 3,328,536. US Pat and 3,829,953 describing advances in this regard. they describe inter alia, devices by which rapid setups can be carried out, with coils wound along grooves of cores with different package heights can be arranged. In US-PS 3 5 ^ 5 721 the desire is already indicated that long and labor-intensive facilities should be avoided.

While the devices of US Patents 3,69β and 3,029,953 are extremely useful and valuable in practice, there remains a desire to have methods and devices . create, through which existing bobbin retraction devices can be converted to achieve reduced set-up times, even if not all of the advantages of the devices described in the aforementioned patents can be achieved. It would further be desirable to provide means and methods that can be used in connection with relatively simple and straightforward coil pulling devices.

U.S. Patent 3,505,721 is an example of an effort that was made to be a specific way of modifying coil pulling devices to create for different core package heights. However, the solutions described so far would be relatively complex and require and would continue to require expensive equipment tools make it necessary that axially extending fingers or blades of the insertion tools machined in a large number of operations will.

With the axial pulling-in of wire windings (for example Coils) in the grooves of magnetic cores, numerous wire segments are moved along axially extending columns, which are

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bearded leaves or fingers are formed. It is known that During such a process, relatively large frictional forces both on the wire segments and on those forming the gap leaves are exercised. These forces are exerted on the blades in a direction that the blades would have to move in the axial direction. As a result, it is desirable to keep the blades from unwanted axial movement to lock firmly and securely relative to each other and relative to the blade holding means during normal machine operation and still allow axial movement of the sheets in a sheet package during a set-up process.

In one of the aforementioned known solutions, a locking pin pretensioned by a spring is provided with a sliding seat in one of numerous locking holes taken along with a blade or finger. It should be noted, however, that such a sliding seat may result in a somewhat loose connection between such sheets and the means for holding them Leaves could contribute. Ultimately, there could be an undesired movement or displacement of these sheets during machine operation appear. In addition, if slide-fit locking pins are used it is necessary to lock the pins with a the correct size to be sure to avoid accidentally shearing off the pins.

As a result, it would be desirable to have new and improved ones Spool retraction devices and methods for changing the geometrical To create relationships between parts of such devices, through which an inadvertent relative movement of these Parts can be avoided. In particular, it would be desirable to provide an arrangement through which these parts are securely locked in position relative to one another during the installation of the device. Furthermore, an improved one would be Coil pulling device useful in which column-forming elements, such as leaves or fingers, in relation to one another Frame or a base of a drawing machine can be adjusted quickly and easily in a simple manner, preferably with

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a simple set-up or adjustment tool, so that coils in slots of magnetic cores with different predetermined Package heights can be arranged.

It is, therefore, an object of the present invention to provide new and improved bobbin insertion devices which are fast and can be easily arranged to fit coils in slots of cores with different predetermined package heights, i.e. H. axial Lengths to be arranged.

Furthermore, such devices and methods are to be created for their establishment, with column-forming elements in predetermined axial positions locked relative to each other securely and held in such a locked state are, while axially slid to various positions, around magnetic cores having predetermined various package heights to record.

Another object of the present invention is to provide an improved To provide a method for adjusting the axial position of numerous gap-forming parts of the coil drawing machine, by sliding a means for holding the parts into predetermined, mutually relatively fixed, axial positions.

According to the invention, a method is created for setting the axial position of numerous column-forming parts of the Spuleneinziehmas chine relative to another part of the machine (e.g. the base or the frame) by placing a number of the column-forming parts against movement or displacement is firmly locked relative to each other. While the parts are locked in this way and while the desired reciprocal If axial relations are maintained therebetween, the interlocked parts are then moved by desired amounts in the axial direction shifted before the coils are drawn into cores of predetermined package heights. Preferably the parts with a Sheet holding device locked, and then this device axially displaced.

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According to a preferred embodiment, the device contains a threaded bushing for holding the numerous crevice-forming parts in locked relation which is normally prevented from axial movement by a second part threadedly engaged therewith and is also prevented from axial movement. Rotation of the second threaded part then causes the threaded bushing to be axial is displaced, and due to the interlocking between the bushing and the parts forming the gaps, these parts become moved relative to the machine frame in the axial direction. In the one illustrated embodiment of the device prevent the engagement relations between the gaps forming Parts and other axially extending parts (for example wedge guides) so that the parts forming the gaps rotate, but they allow axial movement of the parts forming the gaps.

In the embodiment described here, contains a coil drawing machine a base or frame, numerous elongated axially extending leaves that at least partially form numerous gaps for receiving turns, a sheet holder, which is locked with numerous sheets, and one the blade holder actuating device which is used to displace the blade holder (together with the blades) axially relative to the Frame is usable. The blade holder has one threaded surface that is connected to another with a Threaded surface is engaged, which is prevented from axial movement relative to the frame, but still is free to rotate relative to the frame. The blade holder is free to move axially relative to the frame, but it is on prevented from rotating relative to the other threaded surface. The other threaded surface can be an outer surface of a socket be.

The invention will now be based on further features and advantages explained in more detail in the following description and the drawings of various exemplary embodiments.

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FIG. 1 is an exploded perspective view of FIG Parts of the apparatus embodying the present invention in a preferred embodiment and the can be used to carry out the invention in another preferred embodiment.

FIG. 2 is a side view with parts shown in section and partly omitted of the device, the tooling according to the figure 1 contains.

Figure 3 is a sectional view taken along line 3-3 in Figure 2, assuming Figure 2 is a complete apparatus represents.

Figure 4 is a mechanical, somewhat schematic view of the device, which contains the structure according to FIG.

Figure 5 is a side view, partially in section and partially omitted parts of a tool that is used to set up the structure according to FIG can be used.

Figure 6 is a side view, partially in section and partially omitted parts of the device according to FIG. 2, parts of a magnetic core and parts of turns to be arranged in the hats of the magnetic core.

In Figures 1-3 are portions of the improved apparatus 10 for inserting turn side portions of wound electrical Coils shown in predetermined axially extending grooves of a magnetic core. The device 10 can, if desired, for Insertion of insulators (e.g. wedges) of suitable length can be used when placing the wound coils in the core will. In FIG. 6, parts of a core and of coils are shown, which will be discussed in more detail below.

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The device 1Ü comprises a machine frame or a base, the one carrier plate 11, a part of which is shown in FIG

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and a wedge guide housing assembly 127. The wedge guide housing assembly 12 includes an adjustment plate 13, which by numerous screws 14 attached to a wedge guide housing 16 is.

As shown in Figure 1, the key guide housing contains l6 numerous recesses 17 and a number of countersunk holes 18. Wedge guides 19 can slide along the recesses 17 and then be fastened to the wedge guide housing by suitable fastening means, for example screws 21.

It should be noted that the devices and methods according to the invention with a device in which wedge guides are not provided or can be carried out with a device, which is essentially like the one described here, in which a wedge (or isolator) introductory passage is not carried out will. Thus, the description relating to the wedges, wedge guides, etc. is for illustrative purposes only of what is presently referred to as the preferred or best mode for carrying out the invention is maintained.

The tooling, parts of which are shown as an example in FIG . In the illustrated embodiment, all of the sheets 22 are normally interlocked with a sheet holder 3I ₅ to prevent relative axial movement therebetween. However, the present invention can also be practiced with an arrangement in which selected blades 22 are attached to structure other than blade holder 31 for movement relative to other selected blades 22.

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A number of the parts shown in Figure 1 are threaded with internal or external surfaces. Some of these Parts are bolted together while others take up with a mutual sliding fit. For example, the Outer diameter of a bushing 24 with a sliding fit along the inner surface 26 of the blade adjustment nut 27 received. on the other hand is the externally threaded portion 28 of the blade adjustment nut-27 with the inner threaded portion (or Surface) 29 of the blade holder 31 screwed. The pitch nut 27 is substantially on its entire outer surface axial length and the blade holder is along its inner surface for substantially the entire axial expansion provided with a thread.

The socket 24, on the other hand, need only be threaded on its upper end for engagement with a locking nut to allow. Then, after the parts have been assembled, as shown in FIG. 2, a washer 32 is placed over the arranged free end of the socket 24, and a clamping nut 33 is screwed to the blade adjustment nut 27 between the Include washer 32 and a shoulder 34 of bushing 24, whereby movement of the blade adjustment nut 27 in the axial direction relative to the bushing 24 is prevented.

The blade adjustment nut 27 is up to a first assembly step screwed into the blade holder 31. The sheets 22 are then advantageously through with the sheet holder 31 Screws 36 mounted.

It should be noted that although round, the fasteners receiving holes 37, 38 are shown in the sheets 22 and the holder 31, but that also elongated slots instead of the round holes in the blades may be provided so that an initial axial adjustment of the blades relative to each other and to the sheet holder 31 can be carried out. When the sheets are in the desired manner relative to the holder 31 are arranged, in each case the leaves are locked in

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th axial positions relative to each other and to the blade holder 31 held.

The wedge guides 19 can be on the wedge guide housing l6 or attached to the housing 16 after the blade holder 31, blades 22, bushing 24 and blade adjustment nut 27 are assembled (for example with screws 21).

The bush 24 is thereby assembled with the wedge guide housing 16, that it is inserted from the underside of the housing (see Figure 2) until a splash 39 of the socket against a matching one Surface 41 of the adjustment plate 13 presses. Then fasteners for screws 42 (only one shown) inserted through holes 43 in the socket flange and in the adjustment plate 13 screwed to fasten the adjustment plate 13 and the socket 24 to one another. It is thus clear that the Screws 14 hold the plate 13 and the housing 16 in their assembled position.

The assembled blade holders 31, blades 22 and blade adjusting nut 27 are pushed into the middle of the wedge guide housing 16, the inner surface of the blade adjusting nut 27 at the slides along the outer surface of the bushing 24 until the end 44 of the blade adjustment nut abuts against the shoulder 34 of the bushing 24. During this assembly step, the grooves or depressions 46 of the blades 22 are aligned with the depressions 17 of the housing 16 aligned in order to provide a desired aligned relationship with a corresponding wedge guide 19. the Washer 32 is then placed over the free end of bushing 24 and locknut 33 is on threaded portion 47 of the Bushing 24 tightened so as to turn the sheet adjusting nut 27 into one to maintain a fixed axial position relative to the bushing 24, the adjusting plate 13 and the frame part or the plate 11 of the machine and lock.

The relationship between the assembled parts is best understood from FIGS. It should be noted that with the

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Bushing 24 two bronze sleeves 48, 49 are mounted which are pressed into it are. Before the assembled tool equipment according to FIG. 1 is arranged on the machine frame plate 11, a guide tube 51 attached to the base plate 52 by a Opening 53 in the base plate is inserted until a shoulder 54 formed thereon rests on the bottom of the plate 52. A retaining nut 56 is then placed on the guide tube 51 screwed in order to lock the guide tube in a fixed position on the plate 52. The tool setup according to Figure 1 is arranged axially along the guide tube 51, the outer diameter of the guide tube along the bronze sleeves 48, 49 slides.

All actuators for the device 20 are not shown here in order to simplify the illustration; it should be noted, however, that details of such a structure can be found in, for example, U.S. Patents 3,698,063, 3,672,039, 3,829,953 and 3 722 u63 are described.

The tool device is clamped onto the carrier plate 11 with clamping arms 57 and clamping bolts. The housing l6 is relatively loose held, so as to allow an indexing rotary movement of the tool device when a toothed rack, not shown, with the ring gear 59 attached to the housing l6 engaged comes and drives this. Such an indexing movement would be carried out for the convenience of an operator and is not shown here in further detail. However, it is noted that short, held in the base 52 Pins with recesses or notches 6l, 62 (see Figure 1) of the plate 13 come into engagement, according to the tool device each indexing of 180 ° in a desired position.

FIG. 6 shows how turns 63, 64 are arranged along the leaves 22 and received in gaps 66 (see FIG. 3) between adjacent leaves 22. A stator core 67 is then placed over the extended ends 68 of the blade 22,

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is held in position with not shown clamps, and then the actuator is moved axially upwards to a device, such as a scraper with attached sliding blades or ribs 71, to drive around to move axially along the columns. As a result, the turns are in slots, for example slots 72, 73, of the stator core 67 used.

It can be seen from FIGS. 4 and 5 that a cylinder 76 fastened to the machine frame is actuated in order to displace the rod 77 during a bobbin insertion process. A driver, which may be in the form of a plate 78 to which numerous wedge slides 79 are connected, is attached to the rod 77. The cam slider move axially along guides, such as guides 81, which are formed by a carried by the machine frame guide plate 82, and then move upwardly through the guide holes 80 and into the base plate ¹ J 2 (see Figure 2). In this way, insulators or wedges can be slid axially upward between selected adjacent wedge guides during a coil insertion process.

In order to actuate or drive the scraper, the rod or the rod 77 moves upwards, so that an adjustable drive, shown as a screw or bolt 83 and carried at the end against the underside of the scraper 69 meets along the recess 84. With continued operation of the cylinder 76, the scraper 69 (see FIG. 2) with the driver 83 is then pushed upwards, and the windings (likewise on request the wedges) are arranged in the axially running grooves of a stator core. At the end of a drawing-in process the cylinder 76 is withdrawn so as to release the actuator, i. H. the rod 77 to retract to an initial rest position.

If the setup of the device 10 is to be changed, the blades 22 which are not carried by the scraper are removed are and are thus movable in the axial direction relative to

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Machine frame rearranged. A preferred way in which this can be done includes the scraper 69 of FIG dand taken (or using a suitable tool for this purpose) and off the center of the tooling device or the assembly 87 is pulled out. Then a tool such as the tool 86 shown in FIG. 5 is shown in FIG the tool device is used to engage the clamping nut 33, which is rotated at least a partial turn, thereby the leaf adjusting nut 27 can be rotated. Then another tool, similar to the tool shown in Figure 5, having three fingers 88 engaged in one of the span of the indentations 89 in the flange 90 of the blade adjustment nut 27 (see Figure 1) are arranged corresponding span, used for turning the blade adjustment nut 27. The blade adjustment nut 27 is rotated clockwise or counterclockwise depending on whether the sheet holder 31 is raised or lowered shall be. Due to its meshing engagement with the blade holder 31, the blade adjustment nut 27 moves the blade in the axial direction Up or down direction relative to the blade adjustment nut 27, the bushing 24 and the machine frame. The reciprocally engaging relation of blades 22 and the wedge guides 19 prevents the assembled blades 22 and the blade holder 31 rotate together with the blade adjustment nut 27.

After the blades 22 have been adjusted to a desired height to correspond to a preselected or predetermined axial length of a stator core or a package height becomes a Tool (such as a wrench or screwdriver) inserted through the center of the guide tube 51 in order to to attack a control part 83 for the path of movement of the scraper. When the sheets 22 have been extended by one To match the longer core, an extra piece of squeegee will be required. In this case, the control part 83 becomes the The scraper path is rotated so that the scraper is more likely to move during the stroke of the cylinder 76. On the other hand, if the leaves 22 have been withdrawn relative to the wedge guide housing l6, the part 83 is screwed deeper into the connecting rod 91,

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so that a greater part of the stroke of the rod 77 passes before the screw 83 engages the actuator 84 and the scraper 69 moves relative to the leaves 22. After these settings in the device 10 (including the renewed Locking the clamping nut 33) have been made, the actuating rod 84 and the stripper 69 are back in their Arranged operating position as shown in FIG.

In more preferred arrangements that of the illustrated embodiment differ slightly, it is necessary to loosen the clamping nut 33 before adjusting the blade adjustment nut 27. In this preferred embodiment, the shoulder is 30 of the socket 24 at a height slightly above the upper surface of the flange 90 (as viewed in Figure 2). the Washer 32 is then provided with an inner diameter or a bore of a size so that it can be over the threaded end of the Bushing 24 can be pushed and presses against shoulder 30. The disk 32 is then at a distance from the flange 90, and the adjusting nut 27 can then be adjusted without loosening the clamping nut 33.

Using the preferred arrangement previously described, the only time the tension nut 33 would be loosened (and removed) that when a given packet of sheets (i.e., sheet holder 31 and sheets 22 attached thereto) would have to be taken out and to be exchanged for another, slightly different set of blades. This may for example for the reason happen that a specially sized and sized for a given wire size sheet package is to be used if Wire spools of such a wire are to be arranged in a grooved core.

In Figure 6, a stator core 67 is in solid lines with a first predetermined package height shown on the blades 22 before the winding of the coil 63, 64 in the core grooves is arranged. The blades 22 are arranged in such a way that they protrude slightly beyond the end face 9 of the stator core 67,

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after this is arranged on it. The size of such an extension is not critical, but in general it is for it is desirable that the blades protrude about 5-6.5 mm above the top surface 92 of the core.

Such a blade extension above or above the stator core in addition, it is desirable to ensure that the wire is not exposed to any during a coil pull-in operation Part of the stator tooth or the groove edges is exposed. Thus, the blade extensions actually protect the wire from the Statoreisen. In addition, the blade extension or height in conjunction with the scraper determines how far the coils are wound can be pulled through the core as would be readily understood by those skilled in the art.

Furthermore, FIG. 6 shows in dashed lines another core 93 with a greater package height than that of the core The sheets 22 are indicated by dashed lines 9 * J, 96 in that Position shown after a facility adjustment for cores with an axial length generally corresponding to that of core 93. Again be on it pointed out that the blades 22 are arranged so that they protrude about 5 - 6.5 mm from the end face 97 of the stator core 93.

US Pat. No. 3,505,721 mentioned at the beginning contains a discussion regarding the desired adjustability of blades so that different blades extend over different axial lengths extend. With the arrangement according to the invention these objects are achieved, in particular when the blades 22 (see Figure 1) are provided with axially extending slots instead of round holes, as shown at 37. When the sheets 22 under Using such slots are once arranged so that they extend over various desired axial lengths relative to the blade holder extend, the relative axial extensions of the blades are maintained by the screws 36 inserted into the blade holder 31 are screwed. Subsequently, for a given

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Slot arrangement of a stator core all of the normally stationary blades 22 are adjusted substantially simultaneously by the blade holder 31 is axially displaced in the manner described above. The arrangement described above, in which the Sheets 22 are slotted would only be useful if the sheets are relatively large as there is sufficient sheet material for one adequate strength must be retained, and since the heads of screws 36 are necessarily relatively small (and therefore relatively weak) if they were used to attach small sheets of paper to a sheet holder 31. As a result, many Leaf packets Changes in the height of the leaves for a given leaf pack by using leaves of different lengths can be achieved. Since it has not yet been mentioned, it should now be pointed out that the screws 21 are in countersunk holes 18 are received in the housing 16 and screwed into holes 20 in the wedge guides.

With the arrangements shown here, there is practically no risk that the individual leaves 22 inadvertently relative to one another be moved. In addition, all blades, which normally have a fixed position, can be quickly and easily axially adjusted to accommodate cores with different package heights. Even when the present invention is in conjunction has been shown and described with special embodiments, it can also be used together with another bobbin pull-in device than the one described here.

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Claims (1)

2 b 1 Δ d U A- - 16 - Expectations Spuleneinzugmaschine rait a machine frame, characterized by numerous elongated, axially extending, normally stationary blades (22), which at least partially form numerous turns receiving slots (66), a blade holder (3I) ₅ which connects the numerous blades (22) together, and actuating means for the sheet holder (31) for moving the sheet holder (31) and the sheets (22) connected to it in the axial direction relative to the machine frame. Coil drawing-in machine according to Claim 1, characterized in that the sheet holder (3D is a having a first threaded surface (29) having a second actuating means for the blade holder have a threaded surface (28) which is restrained from axial movement relative to the machine frame and the first and second threaded surfaces (29, 28) are arranged in a mating screw relationship. Coil drawing machine according to one or more of Claims 1 and 2, characterized in that the numerous axially extending blades (22) are arranged to form a generally circular arrangement of wire-receiving slots (66), a number of blades supplying turns in specific slots (66) are arranged and are axially displaceable relative to the slot-forming sheets (22), the sheet holder (31) is locked to each of the numerous slot-forming sheets (22) such that a relative movement between the slot-forming sheets (22) and the Blade holder (31) is prevented, first means (19) prevent the blade holder (3D and the blades (22) locked therewith from rotating relative to the blades feeding the turns and second means prevent the blade holder (31) and the blades (22) locked therewith while setting up the machine in predetermined «? axial f; π ρ s /. 1 / η ■ r,? Move positions relative to the machine frame axially and an axial movement of the blade holder (31) during the axial Prevent shifting of the coil feeding sheets during normal machine operation. 4. bobbin drawing machine according to claim 3, characterized characterized in that the first means (19) comprise a plurality of stationary wedge guides which are attached to the Slitting sheets (22) are adapted. 5. coil drawing machine according to claim 2, characterized characterized in that the second means comprises a threaded portion (27) adapted for rotational movement relative attached to the machine frame and against axial movement is held relative to the machine frame. 6. coil drawing machine according to claim 5 »thereby characterized in that the blade holder (3D is provided with a threaded hole (29) and the threaded part (27) is screwed into the threaded hole (29) of the blade holder (31). 7. bobbin drawing machine according to claim 6, characterized in that the threaded part (27) a blade adjustment nut having an outer axially extending threaded surface (28) and a flange (90) on one of it End is in which numerous recesses (89) are formed for receiving tools. 8. coil drawing machine according to claim 5j characterized in that furthermore a bushing (24) is stationary in axial relation to the machine frame (11, 12) is attached and the threaded part (27) is rotatably supported by the socket. 609841/0 9. Method of adjusting the axial position of numerous normally stationary slots forming and of one Sheet holder for supported parts of a coil drawing machine relative to the machine frame, thereby characterized in that a threaded bushing is rotated about its longitudinal axis while it is subject to axial movement relative to the machine frame and while engaged with a thread on the blade holder stands, and that thereby the blade holder and the parts forming slots carried by this axially relative to the bushing and the machine frame. 10. The method according to claim 9 _3, characterized in that guide parts for the wedges are held stationary relative to the machine frame and the blade holder is prevented from rotating with the socket. 11. A method of adjusting the axial position of a given number of axially extending slot-forming parts of a Coil drawing machine with a frame, numerous axially extending and slot-forming parts, which with each other are locked so as to prevent relative axial movement between them during normal circumstances, and with numerous turns feeding blades arranged in selected slots thereby characterized in that the turns feeding sheets pulled out of selected slots and then essentially simultaneously all sheets of the given number a preselected piece in the axial direction are shifted so that the axial length of the elongated portions of the numerous blades is generally the axial Length of a given magnetic core, and that the turns feeding sheets in slots between axially extending, slit-forming parts are arranged. 6098 4 1/0 3 G