FR2703309A1 - Drive device for selectively moving equipment items forming part of a motor vehicle. - Google Patents

Abstract

a) Drive device for the selective movement of items of equipment of a motor vehicle. b) Device characterized in that the positioning device (18) comprises a plurality of excitation coils (26, 28) which are coordinated with the number of equipment elements (72, 76), which are arranged one behind the others, seen in the direction of the axis of rotation of the motor armature, and which can be activated selectively according to their polarity, and the coupling means (44, 46 or 56, 58) are connected to a reaction (32) which forces them, as a function of the instantaneous excitation of the excitation coils, into an operational position associated with this excitation.

Description

"Drive device for the selective displacement of elements

  equipment forming part of a motor vehicle "

PRIOR ART

  The present invention relates to a drive device for the selective displacement of equipment elements forming part of a motor vehicle, having an electric drive motor which comprises coupling means displaceable in the direction the axis of rotation of the armature of the engine between operating positions, and coupled in a fast pivoting manner to the armature of the engine, in which the means

  of coupling cooperate with countermeasures

  coupling which are operatively connected at each instant to a piece of equipment, and the driving device comprising a positioning device

  for the displacement of the coupling means in their po-

operational position.

  Such a training device is already

  commercially available, in which the

  sitionnement presents an electromagnet which must move the entire armature of the engine, which carries the coupling means, against the force of a return spring, in order to pass from a first position of

  operation to a second operating position

  In this case, the holding force must also be overcome by the magnets of the drive motor, which

  must be excited in the usual way by a permanent magnet.

  As a result, the electromagnet should be selected with appropriate force; this leads to a large volume drive device which can hardly be put in place because of the pre-existing limitation of the space available for such devices

  In addition, this known device presents only

  a stable operating position, whereas the

  other operating positions can not be maintained

  only when the coils are energized.

ADVANTAGES OF THE INVENTION

  According to the invention, the drive device is particularly remarkable in that the positioning device comprises a plurality of coils

  which are coordinated with the number of

  equipment, which are arranged one behind the other, in the direction of the axis of rotation of the armature of the engine, and which are selectively activatable

  according to their polarity, and the coupling means are con-

  connected to a reaction element which forces them, according to the instantaneous excitation of the excitation coils, in

  an operational position associated with this excitation.

  The drive device according to the invention thus has the advantage that at each position

  of operation is associated an excitation coil re-

  latively small, which coils move the means

  unsolicited coupling up to the po-

  required, in a simple way, and keep them in place without the need for energy input.

  According to other developments, it is particularly

  advantageously that the coupling means of the motor armature are arranged on a carrier element

  which penetrates in its axis of reinforcement in the direction lon-

  the fact that the excitation coils must not be

  then move that carrier element.

DRAWING

  Embodiments of the invention are shown by way of example in the drawings and explained

  in more detail in the description which follows.

  In the drawings: Figure 1 shows a basic representation, not at

  the scale of a training device which is

  longitudinally sectioned and which is connected, in operation, on one side to a longitudinal displacement device of a motor vehicle seat, and on the other side to an inclination change device for the seat back the driving device being situated in an operating position, FIG. 2 represents the driving device according to FIG. 1 in a second operating position, FIG. 3 represents the circuit for implementing the two excitation coils. which are connected in series and which are part of the driving device, in two different switching positions, Figure 4 shows a basic representation, in section,

  of a positioning device forming part of the

  positive drive, with the shape of the bobbin field

  In accordance with a first embodiment of the invention, FIG. 5 shows a basic representation of the arrangement according to FIG. 4, with the profile of the field.

  of a permanent magnet forming part of the po-

  FIG. 6 shows a basic representation according to FIG. 4, with the field profile of the excitation coils according to another embodiment of the invention, FIG. 7 shows a basic representation of the profile of the field of the permanent magnet which forms part of the arrangement of FIG. 6,

  Figure 8 shows the armature of the motor completely as-

  seemed, with the sectional shaft ends in section,

  FIG. 9 shows a plan view of a guiding element.

  10 is a sectional view of the guide element along line XX of FIG. 9, FIG. 11 is a sectional view of the guide element. along line XI-XI of FIG. 9, FIG. 12 represents an end of the reinforcement axis in enlarged view, and FIG. 13 represents an elevational view of the reinforcement axis, represented in FIG. direction of the arrow

XIII of Figure 12.

  DESCRIPTION OF EMBODIMENTS AS EXAMPLES

  A drive device 10 shown in FIG. 1 comprises an electric drive motor 12 arranged in a motor casing 14, seen in the extension of the axis of rotation of the armature axis 16 of the motor 12, is arranged on an end face of the crankcase 14 a positioning device 18 similarly mounted in a housing 20 consisting essentially of a ferromagnetic material At the other end of the crankcase 14 of the electric motor 12 is fixed a carrier member 22 which has In addition, it is evident from FIG. 1 that the armature pin 16, which is a hollow shaft of the electric drive motor 12, is penetrated by a bar-shaped bearer element 24 in the form of a bar. the longitudinal direction The carrier element 24 exits at its two ends outside the armature axis The mounting of the carrier element 24 in the longitudinal bore

  of the reinforcement axis 16 is such that it is longitudinally movable

  nally in the armature axis 16 On the other hand, means are provided to provide rotational drive

  of the carrier element 24 when the armature axis 16 rotates.

  This can for example be obtained by a surface provided on the carrier element 24 serving as a rotary drive and which is associated with a corresponding anti-rotation drive on the reinforcement axis 16 A construction

  particularly advantageous and economical of such training.

  in rotation is explained in more detail below.

  One end of the bar-shaped carrier member 24 extends into the housing 20 of the positioning device 18, while the other end of the carrier element 24

  extends into the housing-shaped carrier member 22.

  Two excitation coils 26 and 28 are arranged in the housing 20 of the positioning device 18 so that they lie one behind the other, views

  in the direction of the axis of rotation of the armature of the

  The two excitation coils 26 and 28 are

  one behind the other in an implementation circuit 30, which is shown in FIG. 3 A reaction piece 32 is attached to the end of the carrier element

  24 which extends into the housing 20 of the positioning device

  This reaction piece is constituted in two parts in the embodiment shown It comprises an annular permanent magnet 34 whose bore bears on the foot 36 of a fastener 38 which is non-ferromagnetic and which has the mushroom shape

  sectional view The diameter of the permanent magnet 34 is greater than

  The outer diameter of the mushroom head 36 has a central bore 37 into which one end of the carrier member 24 penetrates. The outer diameter of the permanent magnet 34 is dimensioned such that he enters between the two

  excitation coils 26 and 28 resting on the wall

  the view of the axis of rotation of the armature pin 16, the reaction piece 32 is movable by an amount which is obtained by a spacing 40 between the two excitation coils 26 and 28 However, the axial thickness 42 of the annular cheek 39 must be subtracted from this spacing (Figure 5). In addition, the reaction piece 32 in the embodiment according to Figure 1 the fastener 38 is provided with positive attachment coupling means

  44 to which the counter-coupling means 46 are

  The counter-coupling means 46 are arranged

  on a sleeve-shaped component 48 which is rotatably mounted

  in a housing cover 50 forming part of the

  20 and extending by a flange 52 into the

  housing 20 of the positioning device 18 The composition

  The sleeve-shaped shaft 48 is arranged so that its axis is aligned with the axis of rotation of the motor armature 16 and consequently with the axis of rotation of the carrier element 24. A holding ring 54 connected to the housing ensures that the sleeve-shaped component 48 can not

  not leave its bore bore in the lid of the

  50 in an axial direction. On its side facing

  with respect to the reaction piece 32, the flange 52 is

  equipped with counter-coupling means which can cooperate

  With the coupling means of the fastener 32 in a positive locking mode at the other end of the carrier element 24, coupling means 56 are arranged similarly to these coupling means 56 which operate in a manner similar to the positive locking mode, are associated corresponding counter-coupling means 58 which are arranged on the end face of a flange 60 vis-à-vis the coupling means, which collar is part A component 62 is rotatably mounted in a cover 64, which is part of the carrier member 22. The axis of rotation of the sleeve portion 62 is similarly aligned with the rotation axis of

  the armature axis 16 or respectively with the rotational axis

  According to a preferred embodiment, the coupling means 44, 56 and the counter-coupling means 46, 58 are constituted as protruding jaws in the axial direction of the axis of rotation. In this case, the device is arranged so that permanently only a jaw coupling 44, 46 or 56, 58 can switch on and if it is the case, the other jaw coupling is then not in operation The two excitation coils 26 and 28 surrounding the axis of rotation of the motor armature 16 are traversed by sense excitation currents.

  opposite and, as shown in Figure 3, their polarity

  The magnetic field which is developed when the current passes through the excitation coils 26, 28 is represented by the switch 66.

in Figure 4.

  In FIGS. 4 to 7, the reaction piece of the magnet armatures 32 is represented substantially as a

  ring disc for simplicity, without

  In particular, neither the coupling means 44 nor the counter-coupling means 46

  In addition, the carrier member 24 is shown

  presented only in a simple way and differs in its

  arrangement of the embodiment shown in FIGS.

  1 and 2 Field lines 33 show how the

  bake is closed when the switch 66 (Fig. 3) is moved from its normal neutral position, shown in FIG.

  dashed line, to one of its switching positions.

  It is clear that when switching the switch 66 to its other switching position, also represented on the

  FIG. 3, the field lines 33 close in the direction

  Opposite Figure 4 shows the flow direction

  in one of the switching positions.

  The magnetization of the permanent magnet 34 of

  the magnetized armature 32 is represented in FIG.

  This magnetization is such that two different magnetic poles are formed on the two end faces of the ring-shaped cheek 38, so that the field increases, the field lines 39 closing according to FIG. such magnetization, we also make

  to axial magnetization. It is furthermore

  that the position of the reaction piece 32 in the

  FIGS. 4 to 7 do not correspond to any functional position.

  occurring during the operation of the drive device This intermediate position has been selected

  only for the purpose of a better and clearer

  During the operation of the device

  drive, the reaction piece 32 is constantly

  in one of the two operating positions shown in Figures 1 and 2, however, this is dependent on the direction in which the switch

  66 was maneuvered before placing it in its neutral position.

  3 in the case of a brief excitation of the excitation coils 26, 28 in such a way that the magnetic field represented on FIG.

  FIG. 4 increases, the reaction piece 32 and, simultaneously,

  together with it, the carrier element 24, are pushed back by the field of the excitation coil 26 and attracted by the field of the excitation coil 28 Naturally, this

  action is further assisted by the magnetic field.

  that of the permanent magnet 34 whose field lines are represented by 39 in FIG. 5 As a result, an operating position of the driving device, which is shown in FIG. 2, is shown. In this operating position, the means on the head of the mushroom come into contact with the counter-coupling means 46 of the sleeve 48. Even after the disappearance of the magnetic field of the excitation coils 26 and 28, this situation remains permanently maintained.

  since the field of the permanent magnet 38 ensures a hand

  By this position (stopping force) If the electric motor 12 is now activated, the sleeve-type component 48 pivots and transmits this pivoting movement,

  via means designated 70 in FIG.

  longitudinal displacement system, not shown with

  many details, a motor vehicle seat, the-

  which carries the reference numeral 71.

  Depending on the direction of rotation of the

  12, the seat can be moved in the direction of the double arrow 72 However, if by means of the switch 66 the two excitation coils 26 and 28 are excited in the other direction, and if the excitation magnetic field is directed in the direction opposite to that shown in FIG. 4, the reaction piece 32 is pushed back by the excitation coil 28 and attracted by the excitation coil 26; in this case, the tilting movement that occurs is aided by the constant magnetic field of

  the permanent magnet 34 The coupling means 56 come from

  are now in contact with the means of

  coupling 58, so that the sleeve 62 is rapidly pivotally coupled to the electric drive motor 12 A line 74 in Fig. 1 indicates transmission means operably connected to a displacement device which is not shown with much detail and which controls the inclination of the backrest 76 of the seat of the motor vehicle 71 in the direction of the

  double arrow 78 It follows from all this that with the

  According to the invention, two different pieces of equipment of a motor vehicle can

  ordered, although only a single model is used

  However, the use described for the longitudinal displacement and the change of inclination of the backrest of a motor vehicle seat is not the only possible use of the device.

  In accordance with the invention, instead of the pos-

  described possibilities we can also order any

  other part of the equipment or apparatus of a

  motorized vehicle such as sliding windows.

  the sunroof, the mirrors, the headrests, etc. It is clear that the coupling means 44 must be disengaged from the counter-coupling means 46 when the coupling means 56 engage with

  the counter-coupling means 58 Consequently, the

  their race, obtained from the value 40 minus

  the value 42, for the armature of the magnet 32 between its

  operating conditions, should be somewhat more

  great that the depth of penetration seen in the direction

  axial direction or in the direction of displacement of the carrier member 24, between the coupling means and the coupling counting means Of course, this applies in exactly the same way by means of

  coupling 44 and by means of counter-coupling 46.

  An arrangement of the invention may be characterized

  in that the positioning device 18 has

  a plurality of excitation coils 26, 28 which are

  binned with the number of pieces of equipment (eg

  two in the exemplary embodiment), which are dis-

  placed one behind the other, seen in the direction of the axis of rotation of the motor armature, and which are selectively operable according to their polarity, the means

  coupling 44, 56 being connected to the reaction piece

  32, which forces them, as a result of the excitation

  instantaneous excitation coils 26, 28, in the position

  operating mode respectively associated with the excitation and wherein the coupling means 44 and 56 respectively pass respectively in contact with the counter-coupling means 46 and 58 associated therewith. According to another embodiment of the invention, which embodiment will be explained with reference to FIGS. 6 and 7, the two excitation coils 126 and 128 have electric currents which pass through them in the same direction, so that the magnetic field

  shown in Figure 6 increases when the two bobbins

  126, 128 are excited in the same direction. In this embodiment, the field lines have been provided with reference numeral 133. However, in this case the magnet

  of the reaction piece 132 (FIG. 7) must

  a magnetization different from that of the permanent magnet 34 of the reaction piece 32 of FIG.

  magnetization must be carried out in such a way that two poles

  Different magnets are formed on the outer casing surface 33 and the bore casing surface 35 of the ring-shaped cheek. This means that the magnetization of the permanent member must be

  radial magnetization So this again provides the ef-

  already explained with reference to Figures 4 and 5 or

  the corresponding interaction between magnetic fields

  of the excitation coils 126, 128 and the magnetic field

  from the reaction room 132, as well as the

  function in both operating positions

  positioning device.

  In the text that follows, details are now

  FIG. 8 shows the armature 13 of the motor 12 in its finished state, assembled and ready for operation; in this case, both ends of

  the armature shaft 16 are severed.

  Guiding elements 100 are mounted on both ends of the frame axis 16 which is a hollow axis; these guide elements will be described with more

  detailed with reference to Figures 9 to 11

  shown in FIGS. 12 and 13, the reinforcement axis 16

  at both ends, in each case, an annular groove 102. In addition, transverse grooves 104 are machined in the end surfaces of the reinforcement axis 16. According to FIGS.

  guide has a wall 106 provided for approximating

  In the marginal area of an end face 108 of the wall 106, the shape of a disk having a diameter somewhat larger than the diameter of the armature axis 106 has been formed thereon. , in the embodiment presented here, four holding hooks 110 which deviate from the end face 108 of the wall 106 on a part of the envelope surface of the armature pin 16 Their length is dimensioned so that the teeth

  112 formed on their free ends penetrates

  undertight in the annular groove 102, while the wall 106 is supported, by its end face 108, against the end face of the end surface 114 of

  the reinforcement axis 16 so that it intersects the longitudinal axis

  In addition, a shoulder 116 protruding in the direction of the extension of the hooks,

  is formed on the wall 106 of the guiding element 100

  bristled from an elastic plastic material, which shoulder fits snugly into the groove 104 of the armature pin 16 when the guide member 100 has

  mounted on the armature pin 16 in the manner

shown in Figure 8.

  As is still shown in the figure

  8, the carrier element 124 passes through the walls 106 of the elements

  100 and out their end zones outside the guide elements 100, of a certain

  quantity such that the coupling means 44 and 56 can

  These ends are shown in Figure 8.

  that the carrier element 124 is chosen, in the mode of

  embodiment described here, as a bar with a square profile.

  Figures 9 to 11 clearly show that the extremities

  of the carrier element 124 pass through the walls 106 of the elements

  100 in the passages 118 whose section

  cross-section is adapted to the cross-section of the

  square spun In this case, the matching between passages

  118 and the square profile is adjusted so that a drive

  Reliable rotation is obtained between the square section and the guide element 110, while maintaining the longitudinal mobility of the carrier element 124 The shoulder 116 of the guide element 100, which shoulder enters the transverse groove 104 of the armature shaft 16, provides a reliable rotational drive between the armature pin 16 and the guide member 100 The holding hooks

  , 112 ensure that the guide elements 100 can not

  may not be inadvertently detached from the armature axis 16.

Claims (16)

R E V E N D I C A T IO N S   1) Training device for moving   selective use of equipment elements forming part of a   motor vehicle having an electric drive motor   which comprises coupling means displaceable in the direction of the axis of rotation of the armature of the engine between operating positions, and coupled with a   fast pivoting way to the armature of the motor, in the-   which the coupling means cooperate with coupling means which are operatively connected at each instant to an item of equipment, and the drive comprising a positioning device   for the displacement of the coupling means in their po-   operational arrangement, characterized in that the positioning device (18) has a plurality of excitation coils (26, 28 or 126, 128) which are coordinated with   the number of items of equipment (72, 76), which are   placed one behind the other, seen in the direction of the axis of rotation of the armature of the motor, and which are selectively activatable according to their polarity, and the means   (44, 46 or 56, 58) are connected to an element   reaction (32) which forces them, depending on the instantaneous excitation of the excitation coils, in a   operational position associated with this excitation.   2) Training device according to the   cation 1, characterized in that the coupling means (44 or 56) of the armature of the motor are arranged on the ends of a carrier element (24) which penetrates in its armature axis (16) in the direction longitudinal, is   longitudinally displaceable and is pivotally coupled   fast voting to the frame axis (16).   3) Training device according to the   cation 2, characterized in that the carrier element (24) is designed as a bar with a rotational drive, and in that rotational counter-drive is associated on the armature shaft (16) with the rotational drive of the bar (24).   4) Training device according to one of   2 or 3, characterized in that the two former   trenches of the carrier element (24) are arranged as coupling means.   ) Training device according to one of   Claims 2 to 4, characterized in that a means   coupling (44, 56) is respectively arranged   one of the two ends of the carrier element (24) which   outside of the armature shaft (16), with which coupling means (46, 58) operatively connected to a piece of equipment (72, 76) are associated at each instant, in that annular excitation coils (26, 28 or 126, 128) forming part of   two operating positions, surround the prolongation   of the axis of rotation of the armature, and in that a reaction element (32) associated with the excitation coils is arranged at the end of the carrier element (24) which   exits outside the armature axis.   6) Training device according to the   cation 5, characterized in that the two excitation coils (26, 28 or 126, 128) which are arranged at a distance from one another are traversed by currents of opposite direction and are connected in series. with their polarity reversible, in that the element of   reaction is immersed with an annular permanent magnet (34)   the two excitation coils, in which case the thickness of the ring (42) is smaller than the distance (40) between the two excitation coils (26, 28), and in that   the permanent magnet (24) is magnetized so that two poles   the different magnetic forms are formed on both sides end -   7) Training device according to the   cation 5, characterized in that the two excitation coils (26, 28 or 126, 128) arranged at a distance from one another and traversed by currents of   same meaning, are connected in series with their polarity   to be reversed, in that the reaction element (32) is immersed with an annular permanent magnet (34) between the two excitation coils, in which case the thickness of the ring (42) is smaller than the distance (40) between   the two excitation coils, and in that the permanent magnet   (132) is magnetized so that magnetic poles   different shapes are formed on the surface of the outer envelope   (33) and the bore surface of the bore   (35) of the ring-shaped magnet (34) (magnetization ra-   Diale). 8) Training device according to one of   Claim 6 or 7, characterized in that the magnet   manent (34) is arranged to be substantially canceled.   in that the carrier element (24) penetrates at one of its ends into the central bore in the mushroom root (36) of a fastener (38) having   a mushroom shape in its longitudinal cross-section   tudinal, and in that an annular permanent magnet (34) is installed on the mushroom foot (36), the diameter   exterior of this permanent magnet being greater than the diameter head of the mushroom.   9) Training device according to the   cation 8, characterized in that the mushroom head   on its end face turned away from the magnetized ring (38), one of the two halves of a first   jaw coupling (44, 46).   10) Drive device according to one of   Claims 5 to 9, characterized in that the device   positioning device (18) is arranged in a housing (20) of a magnetically conductive material, which has a   tubular body (39) which rests, by one of its openings   res, on a housing member (14) of the electric drive motor (12), and the other opening   is closed by a housing cover (50).   11) Drive device according to the   10, characterized in that the excitation coils (26, 28 or 126, 128) bear on the inner wall of the tubular body (39).   12) Training device according to one of   10 or 11, characterized in that a first   drive bearing (48) is pivotally mounted in the   housing (50), which bearing extends by a collar   lerette (52) in the housing (20), and in that the other half of the first jaw coupling (44, 46) is disposed on the flange (52).   13) Drive device according to the   12, characterized in that the transmission means (70) for transmitting a rotational movement to a first equipment element (72) are connected to the first level drive (48).   14) Training device according to one of   claims 2 to 13, characterized in that the first   half of a second jaw coupling (56, 58) is located on the other end of the carrier member (24), which first half cooperates with another half of the second jaw coupling, which is disposed on a second drive bearing (62) pivotally mounted on a carrier (22) fixedly connected to the motor housing.   ) Training device according to the   cation 14, characterized in that transmission means (74) for transmitting a rotational movement to a second   piece of equipment (76) are connected to a second drive link (62).   16) Drive device according to the   cation 15, characterized in that a displacement stroke   of the carrier element (24) is obtained from the difference   between the value of the spacing (40) between the two excitation coils (26, 28 or 126, 128) and the thickness (42) of the annular cheek, this displacement stroke   being, when the jaw coupling (56, 58) is po-   in operation such that the other jaw coupling (46, 48) is out of operation (Fig. 1)   17) Drive device according to the   cation 2, characterized in that at both ends of the armature shaft (16), designed as a hollow shaft, the electric drive motor (12) is respectively provided for the carrier element (124). ), a guide member having a bar profile, which has a wall (106) which intersects the axis of the shaft, and in that the carrier member (124) penetrates at both ends into the wall (106). ) guide elements (100) according to a passage (118) whose profile cooperates with the profile of the carrier element (124)   18) Drive device according to the   cation 17, characterized in that the carrier element (124)   is designed as a square profile bar.   19) Drive device according to one of   claims 17 or 18, characterized in that a plurality   hooks (110, 112) are provided on the   king (106) of the guide member (100) prepared from a resilient plastic material, which hooks engage by gripping a portion of the surface of the envelope of the reinforcement axis (16), in a   annular groove (102) of the armature pin (16) with constraint.   ) Training device according to one of   claims 17 to 19, characterized in that at least one   shoulder (116) protruding in the direction of extension of the hooks, is formed on the wall (106) of the guide element (100), which shoulder co-operates with   a counter-shoulder of the armature pin (16), this counter-   shoulder associated with it, and the shoulder forming a drive in rotation between the armature axis and the guide element (100).