Classifications

• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N35/00—Magnetostrictive devices
  • H10N35/80—Constructional details
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N35/00—Magnetostrictive devices

Definitions

• the present invention relates to an actuator device according to the preamble of the main claim.
• MSM magnetic shape memory alloy material
• an MSM (FGL) crystal body typically made on the basis of a NiMnGa alloy
• the MSM crystal body as the expansion unit, performs an expansion movement, the stroke of which usually runs in a direction perpendicular to the direction of flux with the magnetic flux.
• This expansion movement then acts on a plunger which adjoins the end along the direction of expansion or adjustment and which, in turn, interacts with a suitable setting partner in accordance with a respective setting task.
• actuators based on MSM have the advantage of fast switching times and high switching cycles (so-called switching cycle number, which can include more than 400 million expansion processes).
• switching cycle number used for actuators and in response to the initiated magnetic flux expandable MSM expansion units allow a typical expansion stroke in the order of about 4% to 6% based on the Stellient. Expansion direction (in the unexpanded state), wherein the usually elongated crystal body in this direction for maximum Hubausisch on its opposite the ram unit Stirnsei- te is supported or fixed there and receives the magnetic flux introduced on the shell side of flux.
• FIG. 2 for the schematically represented known state of the art illustrates a problem resulting from this mode of action: an MSM crystal body 10 as an expansion unit, suitably supported on the bottom side, is connected via a pair of flux-conducting bodies 12, 14 acting on the shell side (in the plane of the figure) transverse and thus perpendicular to the longitudinal axis extending) magnetic flux H applied to the expansion. Since in practice a completely homogeneous magnetic flux entry into the expansion body 12 is rarely possible and, in order to enable an efficient expansion, it has to be guided playfully within the flux guide structure 12, 14, an inclination or tilting of the expansion crystal 10 occurs as shown schematically in FIG. 2.
• the effect also has a disadvantageous and increasing effect on the current that the oblique position shown promotes an oblique field line course (namely in the plane of the figure from top left to bottom right) and thus a field component in an oblique direction, since the magnetic resistance depends on the friction or contact points is lowered, and thus the air gap between the expansion unit and the surrounding flow-guiding structure is bridged.
• the MSM expansion unit is guided in a lateral guide (typically realized by means of a groove), the groove lying in a neutral, geometrically non-changing plane.
• a lateral guide typically realized by means of a groove
• the MSM unit is held in its defined by the groove position, but will see friction between the expansion unit and the not prevented with this cooperating flux guide, but this friction is applied to the groove area of the MSM expansion unit.
• wear occurs here, which in turn, especially critical in this relatively delicate mechanical design, significantly shortening the life.
• the technology described in EP 1 760 796 B1 is also susceptible to tolerances because of the prevention of tilting or the like. Blocking behavior, the shape and position of the grooves (in cooperation with the outer guide partner) must be precisely manufactured.
• the actuator device having the features of the main claim; advantageous developments of the invention are described in the subclaims. Protection in the context of the present invention is further claimed for the development of claim 7, which is intended to provide equal protection independently, as well as for the variant of independent claim 8. Protection in the context of the present invention. the invention is further intended for an MSM expansion unit for use in the actuator devices according to the invention, in particular if it is the result of a manufacturing process which after the steps of crystal preparation, the crystal division (and possibly the upstream crystal measurement for identification of the expansion axis (s)) the formation of a profiled end face or end face provides, as it allows the functionality according to the invention and produced during manufacture by electropolishing and / or pulling out of an electrolyte bath.
• the transition region between the expansion unit and the plunger unit is formed by suitably profiled configuration of the respective end portions so that along the longitudinal axis in the transition region results in a form and / or adhesion (transverse to the longitudinal axis) causing overlap;
• connection between the units acting at right angles to the movement longitudinal axis, at least in this engaged state ensures that the guide (or lateral support) of the tappet unit, which further development and preferably within the scope of the invention at several points or continuously along its longitudinal extent is realized on or in the associated housing section, is transferred to the MSM expansion unit and this prevents from tilting.
• this temporary positive and / or (acting in the transverse direction) frictional connection only temporarily to design, so provide them in mutually dissolved or detachable units only for the state in which by expansion of the expansion unit, the ram unit is driven.
• the invention it is provided and provided by the invention to provide a permanent connection between the expansion unit and the ram unit, so that the guide according to the invention, which prevents deflection or tilting of the ram unit, is permanently transferred to the expansion unit in the associated housing section, and these along the ( Ideal) longitudinal axis fixed, thus effectively preventing the adverse tilting.
• the profiling according to the invention which allows the form or force fit according to the invention, can be realized in various ways.
• This transition does not have to be form-fitting in each case, in particular, it can also be designed to accommodate play or (significantly reduced) to enable tilting angles.
• the invention in other preferred embodiments of the invention to provide a tongue and groove implementation, in turn alternatively assign one of the partners end a cone, conical section or cylindrical projection, which then recorded in a suitable recording of the counterparty.
• the achievable positive locking ensures a particularly stable transition and thus a particularly effective transmission of the tilting tendency of the expansion unit preventing guide force by the plunger unit.
• the associated receptacle in manufacturing technology particularly favorable manner and in design of the projection as (preferably centric) cylinder, it is again preferred, the associated receptacle as a bore or the like. (Further preferred continuous) to provide opening, for reasons of ease of manufacturability, this is preferably carried out in the expansion unit, the inventive development is not limited to this variant.
• Such a development of the invention advantageously makes it possible to simplify the manufacture of the ram or expansion unit, in particular to prevent machining of the (potentially brittle and mechanically difficult to handle) engaging end of the expansion unit in the transitional area, in that this (in an ideal cylindrical or cuboid contour) in the offered by the connecting element receiving portion for producing the transition according to the invention engages.
• the magnetic flux input means the Flußleitabitese in the MSM expansion unit with the omission of this connecting element done (or this, again alternatively, be designed to be suitable magnetic flux-conducting).
• the transition region between the expansion unit and the ram unit firmly (especially kippfest) and unsolvable design, provides in principle any bonding techniques, the gluing, soldering or (welding) of these units are preferred variants.
• It is on the one hand of the invention comprises, in the development of the inventive idea of the profiled design of the transition region to connect these (corresponding profiled) ends of the units together inextricably.
• a comparable effect is achieved by the supplementary or alternatively providable shell-side supporting or erecting means which, suitably as a buffer, flexing or spring means, engage on the shell side and support the expansion unit in the direction of the ideal longitudinal axis (both metallic or polymeric) spring means , as well as other elastomeric body, even selectively attacking, can realize this advantageous effect, so that also foams or the like. are to be counted among these further education advantageous instruments.
• these buffer, Walk- and spring means are implemented in any embodiments, magnetically conductive, which facilitates the shell-side flow entry into the MSM expansion unit and optimized (since so far the expansion unit then coat side support against the flux would be and too large an air gap here the flow entry and thus adversely affect the efficiency of the overall device).
• FIG. 2 shows a view in perspective analogous to FIG. 1 for clarifying the starting position from the prior art and the associated disadvantages;
• FIG. 3 shows a variant of Figure 1 as a second embodiment ..
• Fig. 4 a variant of Figure 1 as a third embodiment.
• Fig. 7 a fifth embodiment of the present invention.
• Fig. 8 a sixth embodiment of the present invention.
• Fig. 1 a ninth embodiment of the present invention.
• FIG. 1 shows that the plunger unit 16a is not supported only at one end or end (there in the case of FIG. 2 on the housing 20), as is the case in the prior art, but a second one adjacent to the flux guide sections 10, 12 Support 21 in the form of a (solid) housing strut or the like. having an engagement end 17a of the plunger unit 16a leading breakthrough.
• FIG. 3 shows an alternative embodiment of the engagement region on the MSM expansion body.
• This expansion unit 10b in Fig. 3 now has a truncated cone-shaped portion 1 1 b, which, with improved positive engagement, can engage in the hollow cone 17a at the engagement-side end of the plunger unit 16a.
• the embodiment of Fig. 3 advantageously realizes the transfer of a righting or lateral guiding moment to the expansion unit 10b.
• FIGS. 4 to 6 show further variants, here for the realization of a positive connection between ram unit and MSM expansion unit in the transition region.
• Fig. 4 illustrates either a transversely extending tongue and groove combination with pointed inlet ( Figure 5, however, a corresponding tongue and groove configuration with querrough- lie rectangular course);
• the variants of FIGS. 4 and 5 would also reveal conical (FIG. 4) or cylindrical (FIG. 5) projections, which are axially centered in respectively associated recesses (centered).
• Fig. 7 shows an embodiment of the invention, a variant in which a plunger unit 16d with a flat transverse surface 17d fixed and permanently mounted on a correspondingly flat and parallel end face 1 1 d of the associated MSM expansion unit 10d.
• FIG. 8 illustrates a further embodiment of the invention, in which case the ram unit 16 and the expansion unit 10 may remain in their unprofiled form and the invention advantageous, the tilting of the expansion unit preventing effect is realized by a connecting element 30, which in the shown Embodiment (eg by gluing) indissoluble on the front side rests on the plunger unit and, in the longitudinal sectional view of FIG. 8 illustrated by a pair of longitudinal webs 32, a receptacle for the transition-side end of the MSM expansion unit 10 offers.
• this element is realized as a subassembly section of the ram unit 16, seated integrally on it. In this way, in particular a cutting or otherwise profiling treatment can be advantageous.
• the transition-side end portion of the units in particular the expansion unit
• Have indentations or formations wherein, for example, the connection assembly 32 may be designed suitably magnetically conductive), so that so far along the entire length of the entry into the MSM expansion unit a homogeneous magnetic flux entry is possible.
• FIGS. 9 to 11 illustrate variants of the invention in which means acting on the side of the MSM expansion unit 10 are supported and prevented from disadvantageous tilting (FIG. 2); These variants are just as possible as isolated embodiments of the invention, as well as advantageous developments of the above-described variants of the invention or exemplary embodiments.
• FIG. 9 shows a middle side of the expansion unit to the flow guide 12, 14 supporting spring 34, which may be suitably implemented as spring steel or beryllium copper.
• a variant of the spring form of Fig. 9 shows the embodiment of FIG. 10 with an alternative, wavy cross-section designed spring contour 36. Again, the embodiment of FIG.
• FIG. 11 illustrates preferably magnetically conductive realized E- loadomers 38, which along the extension length and distributed in the scope or to the shell side opposite Flußleitbaugrup- 12, 14 realize the support effect of the invention (in all these embodiments, in principle, a loose coupling of expansion unit 10 and ram unit 16 allows, as well as the variant of the solid, permanent connection by gluing, Welding or the like is conceivable).
• the e., astomeric support members are configured to receive a flexing movement (caused by a local expansion or the like of a molded element of the MSM member 10).
• foam-like materials in accordance with further development, in turn, suitably designed to be magnetically conductive), which can suitably buffer local relative movement and / or pick it up in a walking manner.
• the present invention is not limited to these embodiments of the invention, but rather almost any paths, according to a respective environment of use, a necessary geometry or the like. to effect the support according to the invention or the transmission of the transverse support of the plunger unit to the expansion unit by power transmission at the transition region.

Landscapes

• Electromagnets (AREA)
• General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
• Prostheses (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51390095

Family Applications (1)

Country Status (6)

Families Citing this family (4)

Citations (3)

Family Cites Families (14)

• 2013
  • 2013-09-17 DE DE102013110253.0A patent/DE102013110253A1/de not_active Withdrawn
• 2014
  • 2014-07-18 EP EP14753218.8A patent/EP2875533B1/de active Active
  • 2014-07-18 CN CN201480051227.7A patent/CN105612627B/zh active Active
  • 2014-07-18 WO PCT/EP2014/065565 patent/WO2015039784A1/de not_active Ceased
  • 2014-07-18 US US15/022,473 patent/US10424717B2/en active Active
  • 2014-07-18 JP JP2016543338A patent/JP6495924B2/ja active Active

Patent Citations (3)

Also Published As

Similar Documents

Legal Events