Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/12—Stationary parts of the magnetic circuit
  • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
  • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/12—Stationary parts of the magnetic circuit

Definitions

• the invention relates to an electrical machine having a housing, in particular an electric motor, according to the preamble of claim 1.
• an electric machine which comprises a fixedly arranged in a housing stator stack in which a rotor is rotatably mounted, which is driven by generating an electromagnetic stator field.
• the stator pack is spring loaded
• Tensioning means clamped to the housing, fixed and positioned which are designed as clamping sleeves, of which a plurality of distributed over the circumference between outer circumferential surface of the stator and inner shell surface of the housing are arranged extending in the axial longitudinal direction.
• the clamping sleeves or pins are hollow cylindrical and made of spring steel, whereby a spring force is generated in the radial direction of the clamping sleeves, which is effective as a clamping force between the stator and the housing.
• the stator core can be constructed from a plurality of individual laminations, which are arranged axially one behind the other and form the package, the laminations being carriers of a stator winding.
• suitable clamping means the lamellae are held together axially.
• the invention has for its object to connect with simple constructive measures a composite of individual blades stator in an electrical machine with the housing of the machine with high mechanical strength and thermal resistance.
• the electric machine according to the invention which is in particular an electric motor, which is used for example in an accessory of a motor vehicle such as windscreen wipers, windows or the like, comprises a stator arranged in a housing and a rotatably mounted rotor, wherein the stator with a plurality is arranged in parallel and combined to form a stator lamellae.
• the fins serve as a support of a stator winding and also ensure a better
• the electrical machine is in particular an internal rotor motor.
• the lamellae which are part of the stator, are held together by a spring clip, which axially overlaps the disk set.
• a preferably semi or teilzylindrischer part of the spring clip radially supports the disk set on the inner wall of the housing.
• the spring clip thus has a dual function: on the one hand the lamellae of the lamella or stator packet are held together axially, on the other hand, the lamella packet is clamped by generating a radial force in the housing, so that the position of the package in the housing both in the axial direction and in Circumferential direction is set, wherein advantageously in the axial direction a Frictional connection and in the circumferential direction is a positive connection.
• the radial clamping force can be selected as well as the axial clamping force so that under the conditions typical for the particular application of the electrical machine, the package over the required minimum operating time is held securely in the housing.
• the axial and radial clamping force achieves the necessary mechanical strength and stability of the connection.
• the compound has a high quality and is also temperature-resistant, since temperature-induced elongations or shrinkages lead to no or at least no significant weakening of the required clamping force in the axial direction and in the radial direction. Force-displacement curves are designed according to actual requirements. Even mechanical effects such as shocks or vibrations do not weaken the connection. Compared to prior art designs, vibration and noise are significantly better damped.
• the forces acting in the axial direction on the one hand and the forces acting in the radial direction on the other hand via a corresponding structural design of the spring clip are independently adjustable. This is achieved, for example, by the fact that the spring clip has a spring back and also on opposite sides of the spring back at least one clamping foot, the opposite clamping feet axially hold the lamellae and the design of the spring back the radial clamping force against the housing is adjustable. By contrast, the clamping feet are not involved in the radial support or clamping of the stator packet relative to the housing.
• clamping feet has at least four clamping feet. These advantageously include an angle with the spring back and lie on the side surface of the respective end-side lamella in the stator. To assist and improve the axial clamping action, it may be advantageous to increase the number of clamping feet and optionally einzorraen in the clamping feet a contact curvature, which is in contact with the blade.
• the contact curvature allows a simplified radial mounting or insertion of the clamping feet on the disk set by the contact curvature on the side surface of the end-side fins slides radially until reaching the final position during assembly of the spring clip.
• a shoulder between the clamping feet and the spring back which is simulated, for example, the contour of a support ring, which radially overlaps the slats.
• On the outside of this support ring is the spring clip with the spring back, which rises radially relative to the outside.
• the spring back is expediently arched, wherein the curvature extends radially outward and projects radially relative to the lateral surface of the disk pack or the enclosing support ring.
• the buckle comes to the function of the radial spring element by the bulge is radially compressed during insertion of the stator in the housing, however, due to its inherent elasticity endeavors to take their starting position, whereby the radial clamping force is generated.
• the spring clip is advantageously made as a stamped and bent part of metal, in particular stainless steel for better corrosion resistance.
• Fig. 1 is a perspective view of a stator for an electric machine such as a
• stator is designed as a disk set with a plurality of individual parallel slats, which are overlapped by a support ring, with a spring clip which axially overlaps the disk set, wherein the spring back of the spring clip projects radially beyond the outer jacket of the support ring,
• FIG. 4 is a view of the outer surface of a stator with the spring clip in a modified embodiment
• FIG. 6 is a perspective view of the spring clip, which is used in the embodiment of FIGS. 4 and 5,
• FIG. 9 shows the spring clip in a further embodiment in two to eleven perspective views and in an end view.
• the stator 1 which is part of an electrical machine, in particular an electric motor or generator, of a stator 1, which comprises a plurality of individual and arranged in parallel, combined into a package slats 2, the are arranged transversely to the longitudinal axis of the stator and in each case a plurality of circumferentially distributed and radially inwardly extending lamellar teeth 4 have.
• the lamellae and lamellar teeth 4 are carriers of the stator winding, via which the electromagnetic and the rotor driving stator field is generated.
• the slats 2 are overlapped by a non-overextended or not punched-out support ring 3, which identifies a smaller axial length than the disk pack, so that between the end faces of the support ring 3 and the end faces of the disk pack each a paragraph 8 is formed.
• each spring clip 5 consists of a spring back 6 and a total of four clamping feet 9, which are integrally formed with the spring back 6, wherein in each case two clamping feet 9 are arranged on opposite axial sides of the spring back 6.
• the clamping feet 9 are angled relative to the plane of the extending in the axial direction spring back 6, in particular angled approximately 90 °, wherein the clamping feet are connected via a clamping shoulder 7 with the spring back 6.
• This clamping shoulder 7 is adapted to the geometry of the prepunched or wacky paragraph 8 between the end faces of the support ring 3 and the disk set of the slats 2.
• the spring back 6 is arched, wherein the curvature extends in the circumferential direction of the disk pack. Due to the curvature of the spring back 6 rises radially relative to the circumferential surface of the non-overextended or not punched ring 3. In the lateral surface of the ring 3, a corresponding, adapted to the spring back contour for receiving the spring back can be formed. In this case, the lateral portions of the spring back are received in the contour, whereas the central portion rises radially due to the curvature over the lateral surface.
• a plurality of spring clips 5 are arranged uniformly distributed over the circumference.
• the curvature of the spring back 6 is formed part-circular in section.
• different contours are distributed at different angular positions over the circumference, which are formed in the form of grooves 10 and serve to receive the lateral portions or the clamping shoulders 7 of the spring clip 5.
• stator 3 is shown in the installed position or shortly before reaching the final axial mounting position in the housing 11. Since the spring back 6 of the spring clips 5 projects radially beyond the lateral surface of the ring 3, in the installation position, a radial contact between the spring back 6 and the housing inner wall, whereby a clamping force is achieved, which fixes the stator 1 in both the axial direction and in the circumferential direction in the desired position.
• FIGS. 4 to 8 show a further exemplary embodiment which differs from the first exemplary embodiment according to FIGS. 1 to 3 by a slightly modified spring clip.
• the spring clip 5 has in its spring back 6 in the axial direction extending recess 12 in the form of a groove, which has a corresponding
• the recess 12 increases the spring action in the radial direction, so that a greater elasticity is given in the radial direction.
• the groove-shaped recess 12 can also be used for receiving or positioning a pin which is inserted into the recess 12 and rests in the installed position on the housing inner wall.
• Spring clip 5 rests against the side surface of the end-side fins.
• This contact curvature 13 facilitates the assembly process in that the clamping feet 9 can slide radially along the slat set with the contact curvature 13 on the outer side surface of the end-side slats 2 during radial sliding.
• the spring clip 5 is shown in a further embodiment.
• the spring clip 5 has a total of four clamping shoulders 7, of which there are two clamping shoulders on each end face.
• the clamping paragraphs 7 are designed as axially projecting, integrally formed with the main body of the spring clip 5 components.
• Each clamping shoulder 7 has two extending on each side of the clamping feet 9, which are also integrally formed with the clamping shoulder 7 and are in the
• Region of the free end face of each Spannabsatzes 7 are arranged in such a way that the clamping feet 9 laterally parallel to Extending clamping paragraph.
• Each clamping foot 9 has a downward curvature, which leads out of the plane of the clamping shoulder 7 and directed downwards and thus has a component in the direction of a perpendicular to the central plane of the spring clip.
• the free end face of each clamping foot 9 faces the end face of the spring clip 5.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Iron Core Of Rotating Electric Machines (AREA)
• Motor Or Generator Frames (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=40280783

Family Applications (1)

Country Status (5)

Families Citing this family (20)

Family Cites Families (26)

• 2007
  • 2007-12-03 DE DE102007058072A patent/DE102007058072A1/de not_active Withdrawn
• 2008
  • 2008-10-15 US US12/746,123 patent/US8203248B2/en active Active
  • 2008-10-15 EP EP08857173A patent/EP2229721A1/de not_active Withdrawn
  • 2008-10-15 WO PCT/EP2008/063826 patent/WO2009071374A1/de active Application Filing
  • 2008-10-15 CN CN200880118902.8A patent/CN101884155B/zh active Active

Non-Patent Citations (1)

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