FR2627571A1 - MULTIPLE POSITION VALVE - Google Patents

Abstract

It can be operated manually or mechanically. It is used in particular to control in an emergency, an automatic gear change for motor vehicles, comprising a housing with a pressurized medium supply inlet, an exhaust outlet and several use outlets, connected to the change. speed control, an electric switch enabling or disabling the automatic gearshift control. A valve element makes it possible to feed or purge the various outlets of use. The electric switch can be actuated in a first phase of axial control, by the valve element 52, 58 and, consequently, the automatic control of the automatic gear change disabled. The pressurized supply inlet 16 can be opened for the pressurized medium in a second phase of axial control. The selected use outlet 20 can be connected to the power inlet 16 by a rotational movement of the valve member.

Description

The present invention relates to a multi-position valve capable of

  be operated manually or mechanically, used in particular to control in an emergency, an automatic gear change for vehicles, comprising a housing with a supply inlet for pressurized medium, an exhaust outlet and several outlets for use connected to the gear change, an electric switch allowing to activate or deactivate the automatic gear change control, as well as a valve element allowing to supply or purge the different outputs

of use.

  Different manufacturers offer for motor vehicles

  electro-pneumatic or electronic-tire-speed changes

  stemless materials. It would be rational to equip this kind of gear change with an autonomous emergency control system, so that in case of damage or breakdown of the gear change, the vehicle can be brought back to the next garage without the help of others. The object of the invention is to improve a valve of the kind mentioned in the preamble, so that it can perform

several control functions.

  This object is achieved according to the invention because the electric switch can be actuated in a first axial control phase, by the valve element and consequently, the automatic speed change control deactivated, in that the pressurized medium supply inlet can be opened for the pressurized medium in a second axial control phase, and in that the selected use outlet can be connected to the supply inlet by a rotational movement of the element of

  valve around its longitudinal axis.

  Thus, the valve according to the invention initially makes it possible to actuate the electric switch of the automatic gear change and to put it out of service. It is possible to control several user outputs, which can be pressurized or purged. To this end, at least three control positions are possible, namely, purged use output and electrical switch in the starting position, purged use output and electrical switch in control position, as well as use output under pressure and electrical switch in control position. The assignment of control positions takes place by force. The valve element is usefully provided with a pusher, which actuates the electrical switch and then a control valve in the supply inlet; it also has a rotary drawer used to connect the various user outlets to the power inlet. The pusher usefully has a shoulder, by means of which the connection between the operating outlets and the exhaust outlet is interrupted before the opening of the control valve. According to an improvement of the invention, one of the use outputs is permanently connected to the supply inlet, behind the control valve, but in front of the rotary drawer. This output of use continually seeks to put the change of

  automatic speed in neutral position.

  The control valve can be a seat valve or a drawer. The rotary drawer is usefully provided with an axial hole, through which the push-button used to move the electrical switch and the control valve passes in a movable manner. The pusher and the rotary drawer can also advantageously be actuated by

  using only one operating lever.

  The rotary drawer is preferably provided with a training lug

  nement, which is held so as to resist rotation but axially movable in a hole in the actuating handle. The actuating handle usefully has a radial post, cooperating with interlocking surfaces of different axial heights, produced in the case, for the adjustment of the different control notches of the pusher. The rotary slide is advantageously axially supported against the shoemaker by means of balls and is radially centered in each of its respective control positions, by at least two

  ball / spring elements opposite one another.

  The actuating lever, the pusher, the rotary drawer, the control valve and the electric switch are from $

preferably on a single axis.

  By way of example, an embodiment of the invention is hereinafter explained in detail. In the drawing: FIG. 1 is a sectional view of the valve in the starting position. Figs. 2 and 3 are sectional views, the valve in a first and a second control position, FIG. 4 is a schematic view of the rotary drawer, La. FIG. 5 is a developed projection view of the engagement surfaces, in which the actuation handle can be

  engaged in the different control positions.

  Fig. 1 shows a multi-position valve comprising a housing 10, formed by a lower part 14 and an upper part

  12, interconnected by means of suitable screws.

  The housing 10 is provided with a pressure supply inlet 16, an exhaust outlet 18, three use outlets 20, only one of which is shown in FIGS. 1 to 3, and

of a suite of uses 21.

  A seat 22 is provided in the case, cooperating with an annular valve 24, for example made of plastic suitable for opening and closing the supply inlet of the pressurized medium 16 by means

  pressure, for example compressed air.

  -. The valve 24 is located in a cup 26, provided with an elongated rod 28, the lower end of which, looking at the drawing, rests on a disc 30, which is permanently recalled under the action of a compressed spring. 32, with the result that the cup 26 and, therefore, the valve 24 are applied against the valve seat 22, in

closing this one.

  The spring 32 rests on a plug 34, screwed into a threaded hole in the lower part 14 of the shoemaker and which already constitutes part of the automatic gear change, with which the valve shown cooperates. Between the supply inlet 16 and the exhaust outlet 18, a seal is provided by means of seals 38, 40, the seal ring 38 being located between the lower part 14 of the housing and a sleeve 42 , while the U-shaped lining is located between the sleeve 42 and the side wall of the rod 28 of

the cup 26.

  The cup 26 passes through the disc 30 and a ring 36

inserted in the case.

  The sleeve 42, the lower end of which also rests on

  the plug 34 surrounds the disc 30 and the spring 32.

  The sleeve 42 is provided with transverse holes 44, connecting the

  chamber 33 of the spring 32 at the exhaust outlet 18 via

  diary of an annular space 48 between the sleeve 42 and the shoemaker. Inside the plug 34, produced in the form of a hollow cylinder, is inserted an operating pin 50, which is entrusted to an electrical contact 92, which is schematically represented in FIGS. 2 and 3, and which is used to activate or deactivate the automatic speed change control, with which the valve shown cooperates. Through the cup 26 passes a pusher 52, the lower end of which rests in the starting position according to FIG. 1, just on the operating spindle 50. The inside diameter of the cup 26 is larger than the outside diameter of the part of the pusher 52, which passes through it so that between the pusher and the cup remains an annular space 46, which connects the chamber 33 of the spring to a space

  ring 72 located above the valve seat 22.

  The pusher 52 is provided with a shoulder 54, via

  diary of which, as described below, the valve 24 can be detached from the valve seat 22, which causes the opening of the arrival of the

  medium under pressure via inlet 16, towards the outlets for use.

  The pusher 52 is part of an actuating handle 56 which is connected. In the upper part 12 of the housing is provided a rotary drawer 58, with an axial central hole, through which extends the pusher 52. The rotary drawer 58 is provided with a drive pin 60 which hooks into a axial hole 62 of the actuating handle 56, the latter being able to be moved axially relative to the lug 60. In the upper part 12 of the case, the rotary drawer 58 is, at the top, supported axially by means of balls 64 , its lower face resting on the upper face of the lower part 14 of the shoemaker. The drawer 58 is, moreover, provided with at least two ball / spring elements 66, which center it in the housing. Each of these elements 66 consists of a ball, which is kept pushed radially outward against the inner wall of the part.

  upper 12 of the housing by means of a compressed spring.

  The rotary drawer 58 has, on its underside, a recess 68, having in plan the shape of a nose, (FIG. 4), which, on the one hand, is permanently connected to the annular space 72 and which, on the other hand, can be connected to the different outlets for use by rotating the drawer. as described below. To this end, each of the use outlets is provided with a channel 70, which opens into the upper face of the lower part 14 of the case, towards the interior of the zone over which the hollow 68 of the rotary drawer 58 passes, when

  it rotates around its longitudinal axis.

  A channel 74 goes from the annular space 72 to the outlet of use.

  tion 21, so that it is continuously connected to the space

ring finger 72.

  The recess 68, in the underside of the rotary drawer 58, is sealed upwards by a seal 76, surrounding the pusher 52, and laterally by a seal ring 78, which is housed in a groove of the underside of the rotary drawer 58 and which completely surrounds the chamber 68, as shown

in particular FIG. 4.

  - The rotary drawer 58 is, moreover, as shown in particular in FIG. 4, equipped with an exhaust chamber 80, which is located, all like the recess 68, on the underside of the rotary drawer 58 and surrounds the recess 68, as shown in FIG. 4, without however being linked to it. Room 80 is permanently connected to the outlet

exhaust 18 through a channel 82.

  The outlets of use 20, which are not subjected to the medium under pressure, open out via their respective channels 70 into the chamber 80 and are therefore, as described below, brought into the open air by channel 82 and sbrtie

exhaust 18.

  The actuating handle 56 is provided with a radial lug 84 cooperating with stops or interlocking surfaces 86, 88, 90, produced in the upper part 12 of the shoemaker and who.

  shown in projection developed in FIG. 5.

  The valve according to the invention operates in the following manner. a Fig. 1 shows the starting position of the valve. The valve seat 22 is closed and, consequently, the supply of the pressurized medium is cut off; the use output 20, shown in FIG. 1, is purged via the channel 70, the hollow 68, the annular spaces 72 and 46, the chamber 33, the transverse holes

  44 and the annular space 48, connected to the exhaust outlet 18.

  The other use outputs 20, not shown, are purged via the associated channel 70, the chamber 80 and the channel 82, connected to the deaeration output 18. The electrical switch 92

is not activated.

  As shown in Fig. 1, the pin 44 of the actuating handle 56 rests, in this position of the valve, against the interlocking surface 86, produced as shown in FIG. 5, under

form of a groove.

  When the lever 56 is pushed down, as shown in FIG. 2, the operating spindle 50 is also pushed down by the pusher 52 and, as a result, the electrical switch 92 is switched or open. The opening of the electric switch 92 deactivates the automatic gear change control, not shown, so that the gears can now be shifted manually. 2When we continue to press the lever 56 downwards, the passage between the cup 26 and the pusher 52, that is to say the annular space 46 is closed by the shoulder of the pusher 52, and the connection, between the annular space 72 and the exhaust outlet 18, is interrupted. while continuing to press the lever 56 and, consequently, the pusher 52 downwards, until it is at the height of the interlocking surface 90, as shown in FIG. 3, the valve seat 22 is opened by the shoulder 54 of the pusher and the pressurized medium can pass from the supply inlet 16 into the annular space 72 and from the latter into the use outlet 21, via channel 74. Thus, a corresponding cylinder of the associated gear change is pressurized, which places the

  gear change in neutral position.

  During these operations, the lever 56 is simply increasingly axially pushed down, while the rotary slide 58 has not yet been rotated. This and, consequently, the hollow 68 of its underside in the form of a developed nose, are in the starting position shown in FIG. 4, in which the hollow 68 is connected to none of the operating outlets 20. Only the outlet 21 is supplied, since with the valve seat 22 open, FIG. 3, the medium under pressure goes directly from the annular space 72 to the

  use output 21, via channel 74.

  When, in this axial position, as represented

  shown in Fig. 3, the lever 56 is rotated and, consequently, the rotary slide 58, around the median longitudinal axis of the valve, one of the

  use outputs is connected to the pressure supply.

  As regards the example described, three use outputs 20 are provided through which the first and the second can be passed, as well as the reverse gear change, not shown. The corresponding use outlet 20 is, for this purpose, supplied with pressure from the open valve seat, via the annular space 72, the hollow 68 in the rotary drawer and the corresponding hole 70. From this In this way, the three use outputs 20 can respectively be pressurized as a function of the position of the rotary drawer, which makes it possible to switch to second or first gear or reverse gear of the associated gear change. The use output 21, which is intended to put the gear change in neutral position, remains

always under pressure.

  Thus, it is possible to supply one of the three use outputs 20, while the other two are purged via the exhaust chamber 80 and the channel 82, connected to

the exhaust outlet 18.

  When one of the operating outputs 20 has been supplied, one of the speeds of the gear change, for example the first, the second

  or the reverse gear has been shifted.

  When the handle 56 is released, it returns to the position shown in FIG. 2, in which the pin 84 rests against the engagement surface 88. Such an engagement surface is provided for each of the three speeds; they are all made in the form of a groove, as shown in FIG. 5. The return of the handle 56 can take place using a spring (not shown), which applies for example a permanent pressure on the operating pin 50 in the direction of the pusher 52, so that the handle 56 is push in

  the position mentioned above, via the pusher 52.

  If necessary, it is also possible to provide a spring

  corresponding between the lever 56 and the rotary drawer 58.

  When the lever 56 returns, to the notch II, as shown in FIG. 2, the valve seat 22 is closed and the use outlet 21, as well as the use outlet 20, having been pressurized, are purged, the speed passed at the speed change, with which the valve cooperates represented,

staying in gear.

  This purge is performed so that the sprockets of the change of

  speed can center themselves.

  In order to disengage the gear shifted, the actuating lever 56 is pushed downwards in order to reset it to the notch III, as shown in FIG. 3, and the rotary slide 58 turned so that it returns to the starting position or the neutral position N (Fig. 4), provided between the first and the reverse gear. In this position of the rotary drawer 58, only the user output 21 is supplied, if

  although the gear change is returned to the neutral position.

  When the actuating handle 56 is released in the starting position, it returns to the notch I, as shown in FIG. 1. When, on the other hand, the rotary slide 58 is in the neutral position N (Fig. 4), the actuation lever 56 remains on the catch

  III, without any of the user connections 20 being supplied.

  In this position, the use output 21 is, on the other hand, supplied, which, as already indicated, puts the gear change back into

neutral position.

  The notch I corresponds to the engagement surface 86 or to the starting position, the notch II to the engagement surface 88 or to the two forward gears and to the reverse gear and the notch III to the surface

  switch 90 or in the neutral position.

  Thanks to the interlocking surfaces or associated grooves, in which the lug 84 of the actuation handle can be hooked, the different control positions of the handle

  actuation and, consequently, of the pusher 52 can be fixed.

  When the operating lever 56 returns to the position of

  start, in which the tenon 84 abuts against the enclosure surface

  chement 86, as shown in FIG. 1, the electrical switch 92 is closed, for example by the force of a spring and the automatic gear change control, not shown, is returned to service. Each of the usage outputs 20 and, consequently, each of the three speeds of the gear change are controlled or passed

  * in the same way as previously described.

Claims (11)

Claims   1. Multi-position valve that can be actuated manually or mechanically, used in particular to control in an emergency, an automatic gear change for motor vehicles, comprising a case with a supply inlet for pressurized medium, an outlet for exhaust and several outlets for use, linked to the gear change, an electric switch enabling the automatic gear change control to be switched on or off, as well as a valve element   used to supply or purge the various user outputs   tion, characterized in that the electric switch can be actuated in a first axial control phase, by the valve element (52, 58) and, consequently, the automatic control of the automatic gear change deactivated, in this that the pressurized supply inlet (16) can be opened for the pressurized medium in a second axial control phase, and that the selected use outlet (20) can be connected to the inlet feed (16) by a rotational movement of the element valve.   2. Valve according to claim 1, characterized in that the valve element comprises a pusher (52) which actuates the electrical switch (92) and then a control valve (22, 24) in the supply inlet ( 16), in that it is further provided with a rotary drawer (58), in order to 'connect the different   use outputs (20) at the power input (16).   3. Valve according to claim 2, characterized in that the pusher (52) is provided with a shoulder (54), by means of which the connection between the use outlets (20, 21) and the outlet exhaust (18) can be interrupted before the opening of the control valve (22, 24).   4. Valve according to one of claims 1, 2 or 3,   characterized in that one of the operating outlets (21) is permanently connected to the supply inlet (16) behind the valve   control (22, 24), but in front of the rotary drawer (58).   5. Valve according to one of claims 2 to 4, characterized   in that the control valve (22, 24) is a seat or slide valve.   6. Valve according to one of claims 2 to 5, characterized   in that the rotary drawer (58) is provided with an axial hole, through which moves displaceably, the pusher (52) serving to actuate   the electrical switch (92) and the control valve (22, 24).   7. Valve according to one of claims 2 to 6, characterized   in that the pusher (52) and the rotary drawer (58) can be   actuated by means of an actuating handle (56).   8. ' Valve according to claim 7, characterized in that the rotary slide (58) has a drive lug (60) which is held so as to resist rotation but which is axially movable   in a hole in the operating handle (56).   9. Valve according to one of claims 7 or 8, characterized   in that the actuation handle (56) is provided with a radial pin (84), cooperating with interlocking surfaces (86, 88, 90) of different axial heights, produced in the case, for the   adjustment of the different control notches of the pusher (52).   10. Valve according to one of claims 2 to 10, characterized   in that the rotary slide (58) is radially centered by ball / spring elements.   11. Valve according to one of claims 2 to 10, characterized   in that the operating handle (56), the pusher (52), the rotary slide (58), the control valve (22, 24) and the switch   electric (92) are on the same axis.