WO2013029677A1 - Collar apparatus for a segmented electrical machine - Google Patents

Abstract

The aim is to be able to assemble a segmented electrical machine in a simpler manner. A collar apparatus having a plurality of collar elements (1, 2) which each have a hook (8, 9) at their ends is proposed for this purpose. The plurality of collar elements (1, 2) are assembled to form a closed ring by a pin (3) being arranged between in each case two adjacent collar elements, the hooks (8, 9) of the two adjacent collar elements (1, 2) engaging around said pin so that the collar elements 1 and 2 are connected to one another in an interlocking manner in the circumferential direction of the ring.

Description

description

Cuff device for a segmented electrical machine Ma ^¬

The present invention relates to a sleeve device for a segmented electric machine. In towards ^¬ of the present invention relates to a entspre ^¬ sponding segmented electrical machine.

A trend in electrical engineering is asking that as new materials for motors, various soft magnetic material ^¬ lien as SMC (soft magnetic composite soft magnetic

Plastics) and soft ferrites, some of which are already in use. The advantages lie in the simple processing of these materials (eg injection molding technology, compression molding) and in the high electrical resistance, which allows a high supply frequency and thus high speeds, since eddy currents are effectively suppressed. In addition, new forms can be implemented with the mentioned magnetic materials.

Another trend is the segmentation of the stator of electrical machines. In the small machine area this serves the simplified assembly. The yoke is subdivided into several segments. If the machine has teeth, the yoke is split so that each segment has a proportional yoke segment. In particular motors made of SMC and ferrite are suitable for this technique. The teeth can be easily fitted with a single-toothed winding ("toothed coil technique") After the winding has been applied, the individual segments can be joined together to form a complete motor stand (stator) The segments can be pressed together in various ways: Tubes , Housing, Bandage, etc. The slight disadvantages in the operating behavior due to the production-related air gaps between the adjacent surfaces is accepted in favor of the very easy and cost-effective production in purchasing. The individual segments must be joined to a stator. This should add, with minimum work done Kings ^¬ nen. Segment motors of low power are today combined with plastic / metal pipes or housings to complete engines. For plastic tubes are thermal problems arise in metal pipes unwanted eddy current losses ^¬. In addition, the tubes must still have flanges or similar constructive details to connect "the tube" to the design environment, but also the production of the bearing seat is problematic, and the tubes can also be used only to a limited extent for the purposes of compression are quite brittle and can not be forced at high Drue ^¬ CKEN into a tube with a smaller diameter.

Classic motor housing offer the advantage that the bearing seats ^¬ and the connections ( "terminal box") already exist. However, the housings are costly.

Also conceivable are bandages made of glass fiber fabric or similar materials. Here, the clamping force can be adjusted very well via the preload. The disadvantage is the lack of mounting points for connecting the stator to the environment.

The object of the present invention is thus to propose a structurally simple mounting device for segmented electrical machines.

According to the invention this object is achieved by a Man ^¬ schettenvorrichtung for a segmented electrical machine with

 a plurality of cuff parts, each having a hook at their ends, wherein

 the plurality of cuff parts are joined together to form a closed ring by

between each two adjacent sleeve parts a bolt is arranged around which grip the hooks of the two adjacent sleeve parts, so that the sleeve parts in the circumferential direction of the ring positively ^{miteinan ¬} are connected.

Advantageously, the cuff device thus only has a plurality of cuff parts and bolts, which the

Hold cuff parts together. This simple construction is possible, since the sleeve parts have hooks at their ends, with which they allow the bolts to join together to form a closed ring.

Preferably, all parts of the collar of the ring are the same ^¬ formed. So if all parts of the sleeve have an identical shape, they are cheaper to manufacture and also have advantages in logistics.

The number of cuff parts forming the closed ring can be two. This is especially for small machines advantage, as can the electric Ma ^¬ machine installed with a few simple steps.

Advantageously, the bolt has a tool holder at one of its ends. This may for example be a Schrau ^¬ benkopf or a hexagon socket, so that the bolt can be reliably turned on with the tool play as ^¬.

In addition, the bolt may have a thread or a bayonet closure element or the like. This has the advantage that the bolt can be fastened to a mounting surface, or that another component can be fastened to it with simple rotary motion.

Furthermore, the bolt may have a chamfer at one of its ends. This leads to the advantage that the bolt can be easily inserted during assembly in the interstices, which are formed by the hooks of two adjacent mounting parts. In addition, the bolt may have a groove or a waisted area. The groove and the waisted area allow a positive fixation on the sleeve parts.

As has already been indicated, it is particularly advantageous to produce a segmented electric machine whose segments are clamped in an abovementioned sleeve device. The segments may be parts of a segmented engine. In principle, not only the stator but also, for example, the external rotor of an electrical machine can be segmented and held together by the sleeve device. In a preferred embodiment, the segmented electric machine with the bolt or the bolt is attached to a carrier. So that the bolts have not only the radio ^¬ tion of holding together the cuff device, but also the function of fixing the electrical machine to another component.

Furthermore, a bearing, a frequency converter, a sensor or an encoder, etc. may be attached to the bolt or to the bolt. This additionally gives the bolt the functionality of holding another component, which is necessary for the operation of the electric machine.

The present invention will now be explained in more detail with reference to the accompanying drawings, in which:

1 shows the basic structure of the Verriegelungsmechanis ^¬ mechanism of a sleeve device.

2 shows a concrete embodiment of a sleeve device with two identical sleeve parts and

3 shows a concrete embodiment of a bolt. The embodiments described in more detail below represent preferred embodiments of the present invention. Segmented electrical machines have numerous advantages in the production and in particular also in the winding of individual coils of the magnetic active parts. The following embodiments may refer to any types of such segmented electrical machines (particularly motors as well as generators).

For textile spindles (eg ring spinning machines), the rotor can only be stored on one side, as it must be possible to pull the rotor at any time. The axis is perpendicular to these spindles. Price pressure in textile machinery is very high. Therefore, highly efficient and made of low-cost materials SMC / ferrite motors are particularly suitable. Accordingly, the mounting of the stand must also be installed quickly and be very cost-effective.

For this purpose, the segments of the electric machine, in particular stator According to the invention packaged to complete Aktivtei ^¬ len or complete stators. This is realized by a multi-part sleeve device (see FIG. 2). The bolt (s) for closing the sleeve device preferably serve as attachment to the surrounding structure at the same time. With such a sleeve device can be a solid packaging, for example, the stator segments of a Mo ^¬ gate reach. The tensile strength of the bracket around the Seg ^¬ ments can be easily and accurately by the

Adjust the diameter of the bolts. The screws / bolts integrated in the sleeve device can be designed to be captive and used to fasten the stator to a construction. Over the length of the bolt can then be the distance between, for example, the stator and set a mounting surface. In addition, there are possibilities for the inclusion of, for example, a small frequency converter or an opti ^¬ onalen encoder via the integrated bolts, as shown in more detail below. The cuff device can also be used to realize efficient heat dissipation by choosing suitable materials.

The sleeve device has according to the schematic diagram of FIG. 1 at least two sleeve parts 1, 2. FIG. 1, however, shows only a section of the ^{collar device} forming a closed ring in the region of a connecting section whose central element is a bolt 3.

For larger diameters of the motors as many cuff parts 1, 2 can be strung together. Each part has bent-over ends 4, 5, each having a hook bil ^¬. The sleeve parts are placed, for example, around the stator to be molded for mounting the motor segments. In this case, the sleeve portions 1, 2 together so that the hook at ^¬ bent ends into each other according to Fig. 1 For this purpose, the bent-over ends 4, 5 each surround the bolt 3. The bolt 3 clamps the two adjacent sleeve parts against the stator. Due to the diameter of the bolt, the tensile force F can be adjusted.

The bolt 3 may additionally, as mentioned, serve as a fastening element for fastening, for example, the stator on a carrier or a mounting surface. On top of the bolt 3 can have a form-fitting tool holder (z. B. Allen, hexagonal bolt head, etc.) Availability checked ^¬ gene, which is explained below in connection with FIG 3 in greater detail. The underside of the bolt should have a thread, a Baj onettverschluss or a similar Vor ^¬ direction for attachment. This device engages in the design environment in a corresponding counterpart. For example, need when using threaded bolts in the mounting surface threaded holes may be present. To facilitate "threading" of the bolts in the holes or clearances between the bent ends 4, 5, the bolts 3 can be provided with a chamfer and / or countersunk the holes.

In order to better grasp the stator segments or segments of the electric machine, the material of the sleeve must either be sufficiently flexible (thin sheet metal, plastic, reinforced textile tape) or the segments must be approximated to the radius of the finished motor. A concrete embodiment is shown in FIG. Here ent ^¬ speaks the shape of the sleeve parts 1, 2 the Außendurchmes ^¬ ser of the assembled stator. The connecting section 6 in the region of the bolt 3 is designed here such that the finished assembled sleeve device has a circular inner contour 7. For this purpose, one man ^¬ schettenteil 1 has a fork-like shape with two teeth 7 and 8. The inner tooth 7 extends in the circumferential direction of the cuff device approximately to the middle of the bolt 3. It forms the inner contour of the sleeve device. The outer tooth 8 surrounds the bolt 3 in about half its circumference.

Not only the bolt 3, but also the curved end 9 of the second sleeve part 2 fits between the two teeth 7 and 8 of the first sleeve part 1. This bent end 9 likewise surrounds the bolt about its half circumference. The outer tooth 8 of the first sleeve part 1 is so ge ^¬ forms that results in a positive connection together with the bolt 3 in the circumferential direction of the sleeve device. The two sleeve parts 1 and 2 are thus coupled firmly together in the circumferential direction.

The two sleeve parts 1 and 2, for example, in the axial direction of the bolt 3, which also corresponds to the axial direction of the annular sleeve device and thus the axial direction of the electric machine, are joined together. Optionally, the bent ends 4, 5 or 9 together with the teeth 7, 8 shaped so that they can also be plugged into one another in the circumferential direction or can be screwed. The complete engine, ie the assembled segments with the sleeve device are usually not joined until the assembly of the textile machine, for example. The Mo ^¬ tor is instead made as an assembly before and ge provides ^¬. Therefore, it is important to make sure that the structure does not fall apart. This can be ensured by the bolt (s).

In Figure 3, a specific embodiment of a threaded bolt 3 is shown, as it can be used for a cuff device according to the invention. The bolt 3 has a head 10, which can be designed, for example, with an in-hex. At the other end, it has an external thread 11, which terminates at its outermost end in a chamfer 12. Between the head 10 and the thread 11 there is an area 13 of reduced cross-section, ie the pin 3 is fitted at this point, and the pin 3 is captive by this area 13 of reduced cross-section if the collar parts 1, 2 surround the pin 3 only in this area greatly exaggerated in FIG 3 for demonstration purposes.

Another way to secure the bolt would be a small circular groove on the bolt 3. When inserting the Bol ^¬ zens in the formed by the sleeve parts opening a specially provided plastic nose can there be snapped at one of the ^¬ schettenteile Man. Thus, the bolt 3 is gesi ^¬ chert and can still be rotated.

The head 10 is the point of application for tightening the screw. The thread 11 allows the attachment of the complete Sta ^¬ sector on a mounting surface. Over the length of the bolt 3, the distance between the stator and mounting surface can be adjusted. This is necessary to z. B. for the winding head, the Warehouse, a dealer, etc. to create space. The bearing can then be pressed either with the cuff or sleeve device, or it is, as indicated, clamped between Ak ^¬ tivteil and the design environment. A frequency converter and, if necessary, an encoder could also be attached with the same bolt 3.

Advantageously, the inventive Fas ^¬ sung the segments of the electric machine with the cuff ^¬ tenvorrichtung allows, for example, to assemble the entire stand safely. In addition, bearings, frequency converters, sensors, encoders or the like can also be attached to the sleeve device.

Reference sign list

1 cuff part

2 cuff part

3 bolts

 4 end

 5 end

 6 connecting section

7 teeth

 8 teeth

 9 end

 10 head

 11 threads

 12 chamfer

 13 area

Claims

claims 1. Cuff device for a segmented electric machine with - A plurality of sleeve parts (1, 2) having at their ends (4, 5) each have a hook, wherein the plurality of sleeve portions (1, 2) are joined to form a geschlosse ^¬ NEN ring by between each two adjacent sleeve parts a bolt (3) is arranged, around which the hooks of the two adjacent ^¬ cuff parts (1, 2) engage, so that the sleeve parts are connected formschlüs ^¬ sig in the circumferential direction of the ring. 2. Cuff device according to claim 1, wherein all sleeve parts of the ring are formed the same. 3. Cuff device according to claim 1 or 2, wherein the number of sleeve parts (1, 2) forming the closed ring is two. 4. Cuff device according to one of the preceding claims, wherein the bolt (3) has a tool holder at one of its ends. 5. Cuff device according to one of the preceding claims, wherein the bolt (3) has a thread (11) or a Bajo ^¬ nettverschlusselement. 6. Cuff device according to one of the preceding claims, wherein the bolt (3) at one of its ends a chamfer (12). 7. Cuff device according to one of the preceding claims, wherein the bolt (3) has a groove or a waisted region (13). 8. Segmented electrical machine whose segments are clamped with egg ^¬ ner sleeve device according to one of the preceding claims. 9. Segmented electrical machine according to claim 8, which is fastened to the bolt (3) on a support. 10. Segmented electrical machine according to claim 8 or 9, wherein on the bolt (3) has a bearing, a frequency converter, a sensor or a transmitter is attached.