DE2012382A1 - - Google Patents

Description

Dr. Ing.Jörgen Schmidt
Dr.rer.nat Bruno Reitzner

Patent attorneys

8 Munich 2 _t Hermann-Sack-Str. 2

16th Mara 1970

Our sign*
P 3712-1

Patent registration
for

BEOOH AND WADE LINITED,
High Wyoombe / Buckinghamshire (England)

concerning

Control devices for reversible fluid actuated

Drives

The invention relates to control means for reversible "pressure medium-operated motors or drives" and in particular
-but not exclusively'- on one motor for an *

drive device, as it is used, for example, to drive thread |

drill is used. ·

One aim of the invention is to be ί from just one hand

to provide actuated control means to the motor or the drive j

to stop and start and to stop the operation |

to change. I.

The control means provided according to the invention for 1η η ,

reversible fluid-actuated drive have the following I.

Elements on: an ON / OFF control valve for the dumbbell | fluQ to operate the motor5 a reversing valve for suspension
of the mean path ± m motor, and thus to change the

00985271424

Rotation of the motor] a single manually operable control device for the valves »whereby this control device from a first position, where calibrate the control valve in the OFF state let move to a second position where the Control valve is in the ON state and the Uasteuerventll is set for forward rotation, and where da · control valve then bring it to a third position, in which the U control valve is set for reverse rotation, while the control valve remains in the ON state.

OeaäB a preferred embodiment of the invention are means provided, which then generate a resistance level for the movement of the control device when the second position is reached In this way, this position of the operator becomes marked, whereby the resistance can be overcome in a simple manner by a greater force exerted by hand. The forest level can for example be generated by the force that is necessary to oppose the uncontrolled valve the fluid pressure acting on it or the spring means acting on it or move against both su.

The urn plate valve can also work indirectly, while it does the controls flow pressure applied to a relay valve, the latter in turn being the path of the fluid flow changes through the engine.

Further advantages and details of the invention result from the description of “Ines execution tool of a rotary drive tool based on the drawing; In the drawing shows

Fig. 1 is a section along the line C-C in Pig. 4, i.e. one Section through the drive and control part of the tool in the "OFF" state;

Flg. 2 shows a section along the line A-A in Pig. 5, where the Drive and control part of the tool is shown in the "EIH" state and with forward rotation;

009862/1424

Flg. 3 a section length of the line B-B in Flg. 6, where the

Drive * · and control section in "ON" state for reverse Rotation shown lit;

Fig. * A section length of the line R-R < in Fig. 3; Fig. 5 is a section along the line F-F in Flg. 2; 6 shows a section along the line Y-Y in FIG. 3l 7 shows a section along the line X-X in FIG. 2; Pig. θ is a section corresponding to FIG. 1, through the

whole tool old a chuck for a tap.

In the present exemplary embodiment, the drive belongs to the air-driven one Multi-cell or Öleitf3, wing design. If nan this Type of drive or motor designed to be reversible »so only about 18o ° of the cylinder are required for the drive in each of the Directions are used, and it is necessary to go for the air, which is sometimes referred to as purge air, in the outlet provides; otherwise the air would flow through the wings In the Half of the cylinder compressed, not for the moment the drive is being used. This air normally gets through an outlet is drained which is intended for the air inlet, when the cylinder half is used as a drive.

In Flg. 1 let- the tool shown in the "OFF" position and connected to the feed air line.

The tool has a housing 17 with a motor 13 as well as therein arranged control means or control devices for the engine on.

The control devices for the engine are two-part Piston valve 30, which is provided in a housing 17 in a

Bore 31 arranged 1st. The piston valve 30 has a tubular sleeve 5, which sits in a fluid-tight manner in the bore 31 so that it can slide in the axial direction, with a plunger 32 also being arranged in an axially sliding manner within the sleeve 5. The sleeve has a cutout 33 * 1b into which a pin 34 arranged in the housing 17 extends in order to limit the axial sliding movement of the sleeve 5. Ring seal «» 35 ensure that the parts of valve 30 fit together in terms of fluid flow *

The StOBeI 32 has a sliding in the bore of the HUlae 5

. arranged and for part of its length a space ι

having shaft 2 with a widened head 36, which with the adjacent end of the sleeve 5 adjacent to the closed The end of the bore is engageable. At its other end, the shaft has an outside of the housing 17 lying, manually operated shutter release 6.

The closed end of the bore 31 forms a chamber la which is in communication with a channel 1 through which working air is supplied to the tool. The plunger 32 operates an ON / OFF valve together with the \ Hulse to form; the part of the space lying around the shaft adjacent to the head 36 is brought into communication with the chamber 1 a or not, namely when the head 36 is lifted from the end of the sleeve 5 or rests on it. The space surrounding the shaft 2 adjacent to the head 36 is connected to an outlet 10 provided in the housing, specifically via a suitable cutout in the sleeves 5.

Furthermore, a valve 39 is attached in the housing, which welohea one has reciprocating body 7 between swei Positions Movable in a cylinder formed in the housing 1st. The reciprocating body 7 is with see through this extending openings 9 and 22 equipped; in each of the two Positions is one or the other of these openings

009852/1424

a channel 11 in connection with the opening or the outlet 10 The openings 9 and 22 are arranged in such a way that they dl Working or company air from duct 11 through other ducts lead to the rotor, so that the rotation of the motor is caused by dl Movement of the reciprocating body 7 is reversed from one position to the other *

A spring 8 is provided between the body 7 and the housing, to pretension the body 7 (in wing 1) to the right.

Another channel 3 connects a chamber 4 on the right Side of the body 7 with the chamber 1 a through an opening 43 in the wall of the bore in the housing. The sleeve 5 let arranged in such a way » that it closes the opening 43 of the chamber la when the sleeve (Pigg. 2 and 3) is moved to the right; on the other hand brings the sleeve, the opening 43 in communication with the atmosphere, and through channels provided in the sleeve 5 or the shaft 19 or 20 and 21.

The working air enters through an opening 1 and runs into the chamber la behind the stöflel 32. As a result of the upside down When the pressure of the working air is applied, the valve is kept closed and no air can reach the motor 13. The working air continues to flow through opening 43 and duct 3 into chamber 4. The resulting air pressure in this chamber verso pushes the body 7 forward against the force of the Spring 8 and brings the openings 27 and 9 (see also Flgg. 2 and 5) in alignment. In this state, the tax ^ trigger 6 no pressure exerted by hand and no « Rotation of the engine.

If you apply a slight pressure to the trigger 6, it remains the UmsteuerventllhUlse 5 because of the air pressure acting on it (see. Fig. 2) stationary, but air flows around the Head 36 around through openings 10 and 11 and to the piston valve 7 (see Fig. 5). This valve directs the air through openings

009 8 S 2/14 2 A

and 27 into an opening 12, which leads directly to the air motor 13, whereby this in Vorwerterlohtung is set in rotation.

The SpUXluft runs through openings Ik voa Luftaotor 13 in tine Kanter 25 (see. Flg. 5) · From here it arrives at the piston valve 7 and is directed to the front, including through the opening 28 to enter an expansion chamber 15, where it reaches the Auastofiluft of the air motor 13 is wrong. The mixed air is directed from the Kaaaer 15 to the AualsJuffnung 16.

If a greater force is applied to the trigger 6, the valve sleeve 5 is pressed against the operating air pressure acting on it close to the Oehluse 17 (see flg. 3) This movement separates the operating air supply from the Kaaaer k and brings opening 18 old Opening 3 In alignment, whereby the remaining air in the Kaaaer k through the openings 18, 19, 20 and 21 is vented towards the atmosphere. As a result of both the pressure of the spring 8 and the Spttlluftdruoke in Kaaaer 15, the piston valve 7 moves backwards and brings the openings 22 and 23 into alignment. The working air that is even more loosely fed into the opening 11 is now passed through the opening 22 into the Kaaaer 25. From here the air passes through the openings 26 to the air rotor 13 and sets it in motion in the opposite direction.

The purge air, which is capable of the LuftBotor 13, now runs through the opening into the piston valve T and through opening 2k (cf.flg. 6) into the expansionskaaaer 15 Here it meets the external air of the Luftaotor 13 and both types of air are directed into the Aualafl opening 16.

When the trigger 6 is released, the working air pressure behind the head 36 pushes both the StOBeI 32 and the sleeve 5 forwards. This process closes the opening 3 from the discharge and opens it for the working air, on which catfish In Kaaaer k a pressure is built up. When the necessary pressure is reached.

009852 / U24

moves the piston valve forwards into the forward rotation <· Division and let ready for the next work process «Om Letting go of the trigger 6 also stops the air supply for stop the engine. ' .

Ea was set up, that of the room 32 and the valve act against the working air pressure, including maintaining the load; However, this does not mean that much * very much could these elements also loaded against springs or other means be.

Further modifications of the above-mentioned explanatory note are also necessary. For example, the force acting on the body 7 of air pressure could be provided in such "he dal on the other end einwirktj the engine would then run in Vorwartsriohtung if check is body 7 is in the rear position, while it was" * Rlohtung imxSm in uagekehrt when cal the body 7 is in a forward position.

- Fatentansprttohe -

009152/1424

Claims (2)

The patient relaxes 1.! Control device for a reversible pressure medium-operated ^ - 'Drive, marked duroh the following. Elements: an IIN / OFF control valve (32; 5) for operating the actuator, for example. Motor (I3) t a reversing valve (7) to change the path of the control valve through the motor (13) and also to change the direction of rotation of the motor} a single, manually operable control (6) for the valves (32 , 5; 7), this control from a first position (Fig. I) ₀ where see that j Control valve (32, 5) i «OFF state is. In a «wide Position (Flg. 2) below move 1st, where »loh the control valve (32 »5) Ib EIM state is and the reversing valve (7) is set for forward rotation and the control valve is then brought into a third position (FIG. 3) see below • 1st in which the reversing valve (7) for reverse rotation ■ is set while the control valve (32, 5) i «EXV * ! State remains. y naoh claim X, - ! 2. Control device / gekennselehnet duroh Means, which is a level for the movement of the . Then generate control (6) when the swelte position errelohts 1st, whereby the operator knows this position and the resistance that occurs In simple catfish by which a greater force exerted by hand can be overcome 3. Control device according to Claim 2, characterized in that the resistance step is formed by the force that is necessary, including the key control valve against the flow pressure acting on it and / or spring means acting on it. H, control device according to one of claims 1 to 3 »daduroh 009852/1424 g eic enn ζ ei c h η e t that the Umeteuer vent U (7) is controlled indirectly by a fluid pressure that is applied to this valve by another valve (5) « which is operated by the manually operated control (6), 5 * Control device for a reversible fluid operated Motor, in particular according to one of the preceding claims, characterized by the following element a two-position relay valve, which has a body (7) that can be moved to and fro fluid pressure differences applied at opposite ends can be pushed against a return spring » wherein the body (7) eo is formed that.er in his the fluid pressure in the motor (12) in both positions directs to this in a corresponding manner in opposite To set directions in rotation, a housing (17) with a bore (31) * the ara one end open and closed at the other end (la), whereby a « Inlet opening (1) leads into the closed end and two openings (IQ, 18) are provided in the side wall of the bore are in consecutive places between the bore ends seen from the closed end, wherein the two openings (10, 18) via channels to the side of the Body (7) or to one end of the body (7) lead, a two-part piston valve member which is atrömungsmltteldicht fits into the bore (31) and a limited one therein can perform axial sliding movement, wherein the piston valve member has a tubular sleeve (5) and a etromungsmitteldioht has arranged therein plunger (32) which has a limited can perform axial sliding movement in it, wherein the plunger (32) at its end adjacent to the geeahloeetnett 00085271424 End of the bore (31) a gap within the HUI (5) and an enlarged head (36}, the old dta adjacent end of the HUlee (5) cooperates and a ON / OFF valve forms through which the aforementioned space nit the closed end (la) of the bore and the Inlet port can be communicated and disconnected from this, and wherein the anderttytade of the plunger (32) protrudes from the other end of the sleeve and aa open The end of the hole is accessible to a druok that has been created by hand at the end, furthermore the sleeve (5) in its wall one of dea mentioned Gap outgoing opening (38) has the old one of the openings (10) in the side wall of the bore (3L) is aligned in all positions of the sliding movement of the sleeve, and thus the mentioned space in connection with one end of the relay valve holds, wherein the sleeve (5) has a further opening (19) in a End position of the sleeve movement with the other opening (18) aligned in the rare wall of the bore and the other end of the relay valve in connection with the outside atmosphere brings phärendrucic, with the sleeve (5) in its other End position of this opening (18) in the rare wall to the closed The end of the bore (31) and thus opens towards the inlet (l), wherein the plunger (32) and sleeve (5) work together in the bore in such a way that that the fluid pressure applied to the closed end (la) of the bore (31): both the plunger as also the sleeve from the hole up to the crosses of it Expresses freedom of movement, with the enlarged head (36) closes the gap from the inlet (i) and being hand applied to the accessible end of the plunger (32) Pressure moves the plunger into the sleeve (5) to the limit of its movement, with the enlarged head (36) moving from the end of the sleeve 009852/1424 lifts off and the fluid pressure from inlet (I) both sur Side «as well as sub one end of the relay valve · durohläit, with further hand pressure applied to both StOIeI and Sleeve moves on top of each other, including the fluid pressure from one end of the relay valve and disconnect that end towards the AtBOSphKrendxuok tu Open, 6. Control device according to claim 5 * thereby g e k e η η s βίο h η e t, that the aa has one end (V) closed Relay vent U cylinder old of an opening via a channel (3) ait the bore Oi) is connected to the sur movement of the To let in the body's (?) • toflen, with this relay unit at the other end is open, exhaust and purge air from the motor (13) via a Release to the atmosphere * with the cylinder further at different Uafangsteile in the same position lung of the cylinder has three openings, of which the one is an inlet port opening through a said channel (11) old one (20) of the transverse openings in the rare wall of the borehole connected «while the other two openings There are outlet openings, the two inlets of the engine (IJ) do whose forward and backward operations are connected " the to-and-fro body (7) also has openings and inner channels (9, 22) which in a position of the Body (7) the inlet opening "with one of the outlet openings (25, 27) connect, the other outlet opening old the Atmosphere is related, and being in the other Position of the body (T) the connections to the outlets Openings are reversed. 00985 ι Α .. 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