Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
  • H02K41/02—Linear motors; Sectional motors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C29/00—Bearings for parts moving only linearly
  • F16C29/001—Bearings for parts moving only linearly adjustable for alignment or positioning
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C29/00—Bearings for parts moving only linearly
  • F16C29/008—Systems with a plurality of bearings, e.g. four carriages supporting a slide on two parallel rails
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C29/00—Bearings for parts moving only linearly
  • F16C29/12—Arrangements for adjusting play
  • F16C29/123—Arrangements for adjusting play using elastic means
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
  • H02K2213/09—Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators

Definitions

• the invention relates to a device for connecting a linear motor rotor to a linear guide, in particular in ei ⁇ ner placement device for equipping substrates with construction ⁇ elements.
• Such a device is shown for example in DE-19842384.
• the device consists of a carriage on which two guide carriages are directly attached, which are supported on corresponding, provided in a stationary guide housing guide rails, and a Linearmotorläu ⁇ fer, which is attached directly to the carriage between the carriage.
• a Linearmotorsta ⁇ gate is provided, which faces the linear motor rotor.
• the mobile mounting part is pivotable on one side via a compensating element of the first type and resiliently (or displaceably) transversely to the direction of movement and on the other side via a compensating element of the second type pivotally and laterally fixed to the guide elements.
• the compensating element of the first type therefore absorbs both side forces and moments (in particular rolling moments, but also tamping and yawing moments), the compensating element of the second kind only moments.
• the lateral forces, stresses and moments caused by thermal expansion or thermal distortion of the mounting part and by the high magnetic forces between the elements of the linear motor, which act on the bearings of the linear guide are considerably reduced.
• the mounting member Since the mounting member is resiliently supported only on one side transversely to the direction of movement and laterally firmly supported on the other side, the mounting member is prevented from swinging transversely to the direction of movement due to the inertial forces during acceleration and deceleration. A swinging of the mounting part in a direction perpendicular to the plane of movement determined by rails of the linear guide is prevented by the high magnetic force acting between the rotor and the stator of the linear motor.
• the pivotal bearings are resiliently removablest ⁇ taltet, whereby the mounting member is held more stable in its position.
• the spring stiffness can be adjusted to the requirement and the forces acting.
• the compensation elements are arranged so that the guide elements associated with the compensation elements can be brought into engagement with two parallel rails of the linear guide, so that the device can be moved along the two rails.
• a total of four compensating elements are provided, wherein in each case a pair of Aus ⁇ equal elements of the same kind, ie the same construction and bearing properties, and each compensating element is associated with a respective guide element.
• the support plate via a pair of balancing elements of the first type is pivotally and elastically mounted transversely to the direction of movement and only pivotally about a further pair of balancing elements of the second kind.
• the compensating elements are arranged so that the carrier plate is each assigned a pair of equalizing elements on the side of each rail.
• the support plate on a rail side via a pair Aus ⁇ equal elements of the first kind pivotally and laterally resiliently (ie transversely to the direction of resiliently displaceable), and on the other rail side via a pair of Ausretemen ⁇ te second type pivotally mounted and laterally fixed Torque and lateral forces are safely absorbed, however, the lateral support is stiff enough to prevent the mounting part from swinging up.
• the compensation elements are provided on the side surfaces of the mounting part.
• the entire surface of the mounting part can be used for fastening further parts to be moved, for example a mounting head, without parts of the surface being stressed by the compensating elements.
• recesses are provided in the mobile mounting part into which the compensating elements can be inserted. This embodiment is particularly advantageous when attaching the compensating elements on the soflä ⁇ chen space reasons is not possible.
• the compensation elements and the mounting part are made in one piece, e.g. by milling or pouring. This is especially useful when the compensating elements are provided on the side surfaces of the mounting part.
• the compensating elements on a base, with which they are attached to the guide elements. This prevents the forces from being introduced punctiformly into the guide elements and thus resulting in excessive surface pressures.
• FIG. 1 is a schematic cross-sectional view of a first embodiment of the present invention
• FIG. 2 is a schematic plan view of the first embodiment of the present invention of FIG. 1;
• FIG. 3 is a schematic cross-sectional view of a first type of compensating element of the first embodiment of the present invention;
• FIG. 4 is a schematic cross-sectional view of a first type of compensating element of the second embodiment of the present invention.
• FIG. 5 is a schematic cross-sectional view of a second embodiment of the present invention.
• FIG. 6 is a schematic plan view of the second embodiment of the present invention shown in FIG. 5; FIG.
• Fig. 7 is a schematic cross-sectional view of a second
• Type of compensating element of the first kind of the present invention represents, and
• Fig. 8 is a schematic cross-sectional view of a second type of compensating element of the second embodiment of the present invention.
• FIGS. 1 and 2 A first advantageous embodiment of the device according to the invention is shown in FIGS. 1 and 2 shown.
• a linear motor rotor (1) is on the underside of a mobile mounting part (2), here a rectangular support plate (2), be ⁇ consolidates.
• a mobile mounting part (2) for example, a support arm or a placement head is conceivable.
• the support plate (2) is connected in the region of its corners via a first type of compensating elements (3) of the first type and a first type of compensating elements (4) of the second type with four guide elements (5) or guide carriages (5).
• the carriages (5) are parallel rails (6) of a linear guide in Engagement to be moved along a direction of movement shown in Fig. 2 Darge by an arrow.
• the rails (6) are fastened on a rail base (7), which is formed by a metal plate.
• the linear guide consists of the rails (6) and the rail base (7).
• the linear motor rotor (1) is opposed to a linear motor stator (not shown) integrated in the rail base (7) in a small distance.
• FIGS. 1 and 2 recesses are provided in the carrier plate (2) into which the four equalizing elements (3, 4) of the first and second type are inserted and there on the carrier plate (2) by a welded or screwed connection are attached.
• a pair of similar compensation elements (3) are provided on the sides of each rail (in FIGS. 1 and 2 on the left and right of the linear motor rotor (1)).
• the compensation elements (3, 4) have a base with which they are located be bolted or welded to the carriage (5). The structure and mode of operation of these two types of compensating elements will be described below with reference to FIGS. 3 and 4 explained in more detail.
• a first type of compensating element (3) of the first kind which in Figs. 1 and 2 corresponds to the pair of compensating elements provided on the left side of the carrier plate (2), is shown schematically in FIG.
• This first type of Aus ⁇ same element (3) of the first type has the shape of a double "T" in cross section, in which two transverse bars are connected to each other in the middle via a vertical bar Guide carriage dar. At the ends of the legs of the upper crossbar each downwardly facing overhangs can be seen before ⁇ , where the first type of compensation element (3) first type to the support plate (2) is mounted.
• the top bar corresponds to a resilient pivot (represented by arrows in FIG. 3), the pivot point corresponding to the crossing point of the vertical bar with the upper transverse bar.
• the vertical beam is designed to be relatively narrow (for example 5 mm) and thus has a low lateral stiffness, so that the upper transverse bar is resiliently displaceable transversely to the direction of movement relative to the mounting base in the directions represented by arrows in FIG.
• the support plate (2) via the first type of compensating element (3) of the first kind shown in Fig. 3 spring-hinged and laterally ver ⁇ pushed pushed, so that both side forces and moments can be absorbed by this compensating element (3) ,
• a first type of compensating element (4) of the second kind which in Figs. 1 and 2 corresponds to the pair of compensating elements provided on the right side of the support plate (2), is shown schematically in FIG.
• This first type of compensating element (4) of the second kind has in cross-section We ⁇ sentlichen the shape of a double "T ⁇ .
• the vertical bar is designed to be short (for example 2 mm) and wide (for example 10 mm) and thus has a high lateral stiffness, so that the upper transverse bar is relative to the lower transverse bar, which here also represents the base for mounting on the guide carriage , can not be moved laterally.
• the upper transverse bar on whose lateral end faces the carrier plate (2) is fastened, is relatively long (for example 34 mm) and thin (for example 5 mm).
• the upper transverse bar corresponds to a resilient Drehge ⁇ steering (in Fig. 4 by arrows), wherein the Dreh ⁇ point the crossing point of the vertical bar with the obe- ren crossbeam corresponds.
• the support plate (2) is resiliently pivotally mounted on the first type of compensating element (4) of the second type shown in Fig. 4 and laterally fixed so that only moments, but no lateral forces can be absorbed by this compensating element (4).
• Compensating elements (3, 4) of the first and second type are clearly borrowed from those shown in FIGS. 1 and 2 support plate (2) shown pivotally mounted on the left side and transversely to theincis ⁇ direction and on the right side HFge ⁇ lenkig and laterally fixed. Side forces caused by thermal expansion of the carrier plate (2) are absorbed by the left compensating elements (3), whereby the bearings of the linear guide are relieved transversely to the direction of movement.
• the compensating elements (4) of the second type on the right side of the carrier plate (2) have a high lateral rigidity, the carrier plate (2) will swing up, as might occur if the plate is subjected to too soft lateral support , avoided.
• FIGS. 5 and 6 A second advantageous embodiment is described with reference to FIGS. 5 and 6 described. The same elements are provided with the same reference numerals.
• the in the Figs. 5 and 6 illustrated embodiment of the present invention comprises second types of Ausretesele- elements (3,4) of the first and second type.
• the compensating elements e (3, 4) are fastened to the side walls of the carrier plate (2) by a welded or screwed connection and extend in the direction of movement illustrated in FIG. 6 by an arrow over the entire length of the carrier plate (2).
• the full surface of the mobile assembly part (2) can be used to fasten a functional part to be moved, such as a placement head.
• two guide carriages are mounted, which are in engagement with rails (5) of the linear guide.
• the compensation elements (3,4) are described below with reference to FIGS. 7 and 8 described in more detail.
• FIG. 7 shows the cross section of the second type of compensating element (3) of the first type, which is shown in FIGS. 5 and 6 which corresponds to the left side of the support plate (2) provided compensating element (3).
• the second type compensating element (3) of the first type has a base for fastening to the carriage (5) and a narrow vertical beam (for example 5 mm) with low lateral rigidity. At one end of the horizontal leg may have a short vertical overhang, with which the compensation element (3) on the support plate (2) is attached.
• the second type compensating element (3) of the first kind can both moments and lateral forces are absorbed. Side forces, which occur when the carrier plate (2) expands, are absorbed by a lateral, resilient displacement of the horizontal leg relative to the base, as shown in FIG. 7 by an arrow. Moments are intercepted by rotation of the upper horizontal leg around the point of intersection with the vertical beam (also represented by an arrow in FIG. 7).
• the cross section shown in Fig. 8 of a second type of compensating element (4) of the second kind corresponds to that in Figs. 5 and 6 on the right side of the support plate (2) vorgesehe ⁇ NEN compensation element (4).
• This compensating element (4) has a base for attachment to the guide carriage, a short (for example 2 mm) and wide (for example 10 mm) designed vertical beam and an elongated waa ⁇ fair leg (for example, 17mm long and 5mm thick), at the Front side of the support plate (2) is fixed.
• the second type compensating element (4) of the second type can only absorb moments.
• the short and wide vertical bar has a high lateral stiffness, so that the carrier plate (2) is fixedly mounted in the lateral direction.
• the obe ⁇ re horizontal leg acts as a hinge. Moments that occur when heat distortion of the support plate (2), so also here by rotation of the horizontal leg technicallynom ⁇ men, as shown in Fig. 8 by arrow.
• the second type of compensating elements (3, 4) of the first and second types are provided laterally on the carrier plate (2), these compensating elements (3, 4) have a more compact structure and are easier to manufacture. Furthermore, the carrier plate (2) does not have to be used in an additional work step for receiving the Aüs GmbHs institute (3,4) (for example Recesses), as is necessary in the first type of compensating elements (3, 4). Finally, it is possible to manufacture the carrier plate (2) and the compensating elements (3, 4) of this second type from one piece (for example, casting or milling), so that no additional components are necessary. Also in the second types of compensation elements (3,4) of the first and second type, the spring stiffness of the movable beams or legs can be adjusted by appropriate dimensioning the requirements.
• the second exporting ⁇ approximately example shown has the support plate (2) via two From ⁇ equal elements (3,4) on which is provided in each case two carriages.
• the support plate (2) via two From ⁇ equal elements (3,4) on which is provided in each case two carriages.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Electromagnetism (AREA)
• Power Engineering (AREA)
• Linear Motors (AREA)
• Machine Tool Units (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=35197716

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• 2004
  • 2004-07-30 DE DE200410036992 patent/DE102004036992A1/de not_active Withdrawn
• 2005
  • 2005-07-20 CN CN2005800257768A patent/CN1993874B/zh not_active Expired - Fee Related
  • 2005-07-20 WO PCT/EP2005/053495 patent/WO2006013156A1/de active Application Filing
  • 2005-07-20 EP EP05776197A patent/EP1771933A1/de not_active Withdrawn

Non-Patent Citations (1)

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