DE7009627U - CONTROL DEVICE ON A REVERSIBLE, PRESSURE-ACTUATED DRIVE FOR A WORK EQUIPMENT - Google Patents

Description

Control device on a reversible »pressure medium-operated drive for an implement

The invention relates to a device on an irreversible, pressure-medium-operated drive for an implement with a housing having a handle for receiving a reversible fluid motor to which one line for supplying pressurized fluid is connected. being inside the handle and in the fluid line there are arranged controls for the fluid, which consist of an ON / OFF control valve for the fluid flow for actuation of the drive or motor and a diverter valve for Change in the path of the fluid through the engine

The object of the invention is to create a control device which can only be operated by one hand needs·

Accounts: Pautoche Bank AG, CoMo no. 20 / '4 009 Poihdwckt MOnchen 600 60-807

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This is achieved according to the invention in the control device explained in more detail at the outset by providing a control handle for the valves which can be operated by a single pinger and which is connected to a slide that slides in the handle in order to change the direction of movement of the Motown w> v is guided that the control valve in a first position the lines for the OFF state, in a second position for the ΕΓΝ state and the forward rotation of the reversing valve and in a third position / the reverse; Rotation of the connecting TJmsteuerventils with simultaneous retention ■ the control valve in the EIU state and the loading - ^ dienungsgriff is provided with a means for it on pressure drop automatically into the first position brings f. |

According to a preferred embodiment of the invention are Means are 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 is made known to the operator, with the resistance can be overcome in a simple manner by a greater force exerted by hand. The resistance level can for example be generated by the force that is necessary to oppose the reversing valve the fluid pressure acting on it or the spring means acting on it or with respect to both to move.

The reversing valve can also work indirectly ^ by:

the fluid pressure applied to a relay valve | controls, the latter in turn controlling the path of jf

Fluid flow through the engine changes. ^s

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In the drawing, an embodiment of the invention is shown based on a rotary work device is explained in more detail. It shows:

Pig. 1 a section along the line C-C in Fig. 4, i.e. a section through the drive and Control part of the tool in "ATJS" status;

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

Pig. 3 is a section along line BB in Pig x 6, the drive and control part being shown in the ⁿ ON ⁿ state for reverse rotation;

Pig. 4 shows a section along the line R-R in Pig. 3;

Pig · 5 a section along the line P-P in Pig · 2;

Pig. 6 shows a section along the line Y-Y in Pig. 3;

Pig 7 shows a section along the line X-X in Pig. 2;

Pig · 8 a cut corresponding to Big. 1, through the whole tool with a putter for a tap.

In the present exemplary embodiment, the drive belongs for air-operated multi-cell or sliding wing design If you make this type of drive or motor reversible, then only about 180 ° of the cylinder will be used for propulsion in each of the directions, and

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it is imperative that one for the air that is here as Purge air is designated, provides an outlet; otherwise the air would flow through the blades in the cylinder half züaasquoteurüökt that at the moment not for the drive is being used. This air is normally exhausted through an outlet for the air inlet provided when the cylinder half is used as a drive.

In Fig. 1, the tool is 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 control means or control devices arranged therein for the engine.

The control device for the engine has a two-part Piston valve 30 which is arranged in a bore 31 provided in the housing 17. The piston valve 30 has a tubular sleeve which is guided in a fluid-tight manner in the bore 31 in a sliding manner in the axial direction is, further within the sleeve 5, a plunger 32 is arranged to slide axially. The sleeve 5 has a cutout 33 into which a pin 34 arranged in the housing 17 extends to the axial To limit sliding movement of the sleeve 5 ring seals 35 ensure that the parts of the valve 30 flow fit together medium-tight.

The plunger 32 has a slidably disposed in the bore of the sleeve 5 and for part of its length a gap having Sohaft 2 with a widened head 36, which with the adjacent end of the

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Sleeve 5 adjacent to the closed end of the "bore is engageable. At its other end, the shaft has an outside of the housing 17, of Hand operated control handle *

The closed end (of the bore 31 forms a chamber 1a which communicates with a channel 1 through which working air is supplied to the tool. The plunger 32 cooperates with the sleeve to form an IN / ATJS valve; the around the Part of the space surrounding the shaft adjacent to the head 36 is brought into communication or not with the chamber 1a, namely when the head 36 is lifted from the end of the sleeve 5 or rests on it. The · ... · J ^- . Adjacent to the head 36 lying around around the shaft 2 with a space is provided in the housing outlet 10 in communication, and zvev ;. via a suitable cut-out in the sleeve Z.

Furthermore, a valve 39 is fixed in the housing, which a reciprocating body 7 on. st, the between is movable in two positions in a cylinder formed in the housing. The reciprocating body 7 is provided with openings 9 and 22 extending through it; in each of the two positions see one or the other of these openings over one Channel 11 in connection with the opening or outlet 10, The openings 9 and 22 are arranged in such a way that they take the working or operating air from the duct 11 pass through further channels to the motor, so that the direction of rotation of the motor by the movement of the back and forth going body 7 is reversed from one position to the other. I.

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

Another channel 3 connects a chamber 4 on the right side of the body 7 with the chamber 1a through an opening 43 in the bore wall in the housing. the Sleeve 5 is arranged so that it closes the opening 43 of the chamber 1a when the sleeve (Figs. 2 and 3) is moved to the right; on the other hand, the sleeve brings the opening 43 into communication with the atmosphere, namely through channels 19 or 20 and 21 provided in the sleeve 5 or the shaft.

The working air enters through an opening 1 and runs into the chamber 1a behind the plunger 32. As a result the pressure of the working air acting on the head 36, the valve is kept closed and it can no air can get to the motor 13. The working air continues to flow through opening 43 to duct 3 the chamber 4. The resulting air pressure in this chamber moves the body 7 forward against the Force of the spring 8 and brings the openings 27 and 9 (see also FIGS. 2 and 5) into alignment. In this State, no pressure is exerted on the control trigger 6 by hand and the motor does not rotate.

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

the air through openings 9 and 27 into an opening 12, which leads directly to the air motor 13, causing it to rotate in the forward direction.

The purge air runs through openings 14 from the air motor into a chamber 25 (cf. Pig. 5) · From here it reaches the piston valve 7 and is passed near the front to to enter through the opening 28 into an expansion chamber 15, where it mixes with the expelled air of the air motor 13. From the chamber 15 the air is mixed Air directed to the outlet opening 16

If a greater force is applied to the operating handle 6, the valve sleeve 5 is opposite to it acting operating air pressure pressed tightly against the housing 17 (see · Pig. 3) · This movement separates the Operating air supply from the chamber 4 and brings opening 18 with opening 3 in alignment, whereby the Residual air in the chamber 4 is discharged through the openings 18, 19 and 21 to the outside to the atmosphere. As a result of the "es" pressure of the "Pedef" e '^ and T of the purge air pressure in chamber 15, the piston valve 7 moves to the rear and brings the openings 22 and 23 into alignment. The one that is still fed into the opening 11 Working air is now diverted into the chamber 25 through the opening 22. From here the air passes along the openings 26 to the air motor 13 and sets it in motion in the opposite direction.

The purge air coming from the air motor 13 now overflows Opening 12 into the piston valve 7 and through opening 24 (cf. Pig. 6) into the expansion chamber 15. Here meets

they together with the exhaust air of the air motor 13 and both types of air are directed to the outlet port 16.

When the operating handle 6 is released, press the working air pressure behind the head 36, both plunger 32 and sleeve 5 forward. This process closes the opening 3 from the outlet and opens it for the Working air, how a pressure is built up in chamber 4. When the necessary pressure is reached, the piston valve moves near the front into the forward rotation position and is ready for the next operation ready. Releasing the trigger 6 also switches off the air supply to the motor.

It has been found that the plunger 32 and the valve sleeve 5 act against the working air pressure to the Sustaining burden; However, this is not essential, rather these elements could also be opposite Springs or other means are loaded

Further modifications of the exemplary embodiment described above are possible. For example, could the air pressure acting on the body 7 is provided in this way to act on the other end; the motor would then run in forward direction if the body 7 is in the rear position, while it would run in the reverse direction if the body 7 is in a forward position.

- Protection claims -

Claims (1)

I A * O * Protection claims 1 · Control device on a reversible, pressure-medium-operated drive for an implement with one Housing having handle for receiving a reversible fluid motor to which a line for feeding of pressurized fluid is connected »being within the handle and in the fluid line Control members for the fluid are arranged, which consist of an ON / OFF control valve for the fluid flow to operate the drive or motor and a reversing valve to change the path of the Flow means exist through the engine, characterized in that to change the direction of rotation of the Motors (13) just one of one? single finger operated Operating handle (6) for the valves (32, 5; 7) is provided, which is connected to a slide, which is slidably guided in the handle that the control valve (32, 5) in a first position the lines for the OFF state, in a second position for the ON state and the forward rotation of the reversing valve (7) and in a third position for the reverse rotation of the Urneteuerventils (7) while remaining at the same time of the control valve (32, 5) in the ON state, and understand the operating handle with a device, which automatically moves it to the first position when the bridge falls off. 2, control device according to claim 1, characterized in that that the control device has an Orgpn which when the second position is reached an increased Applying resistance to the operating handle (6), which can only be overcome with greater force. 'J-9 3 · controller according to claim 2 _t characterized in that the reverse control valve (7) can be subjected to the application of the increased resistance of the fluid pressure and / or a spring provided for this purpose (8). 4 · Control device according to one of claims 1 to 3, characterized in that the reversing valve (7) with another Y-valve (5) is connected for indirect control by the pressurized fluid, which can be controlled by the operating handle (6). 5 · Control device according to claims 1 to 4 _r characterized in that a two-position relay valve has a reciprocally herfeewegiichen body (7), applied in a cylinder at at opposite ends of fluid pressure differentials 3HT, ^> gen a 3ückhol £ - spring displaceably is, wherein the body (7) is designed so that it guides the fluid pressure into the motor (13) according to the desired direction of rotation in r ^ nen two Si hangings. 6 · Control device according to claim 5, characterized by> * irch, that in the handle a housing (17) with a bore (31) is formed which is open at one end and closed at the other end (1a), with an inlet port (1) at the closed end and two Openings (10, 18) are provided in the bore side wall} which at successive points between the Bore ends - viewed from the closed end are arranged, the two openings (10, 18) via channels to the side of the body (7) or on the one hand End of the body (7) are guided ■ · «P Nt »· Β ·· it tt 7. Control device according to claim 6, characterized in that that within the bore (31) a two-part piston valve member is axially bounded in a fluid-tight manner is movably guided and a lohr-shaped sleeve (5) and a plunger (32) arranged therein in a fluid-tight manner has, which is guided axially movable to a limited extent in the sleeve (5). 8ο Control device according to claim 7, characterized in that the plunger (32) at the end adjacent to the closed end of the bore (31) has an intermediate space within the sleeve (5) and an enlarged one. Has pigtail (36) which cooperates with the adjacent end of the sleeve (5) to form an IN / ATJS valve by which the gap is brought into communication with and separated from the closed end (1a) of the bore and the inlet port can, and that the other I end of the plunger (32) protrudes from the other end of the sleeve ■ 'and carries the operating handle (6). 9β control device according to claim 8, characterized in that that the sleeve (5) has in its wall an opening (38) starting from the mentioned space, with one of the openings (10) in the side wall of the bore (31) in all positions of the sliding movement the sleeve is aligned and thus the space mentioned in connection with one end of the relay valve holds that the sleeve (5) has a wide »opening (19) has, which in an end position of the sleeve movement with the other opening (18) in the side wall of the bore is aligned and brings the other end of the relay valve in communication with the external atmospheric pressure; and that 7-098271-7.74 -11 / - the sleeve (5) in its other end division the opening (18) in the side wall to the closed end of the bore (31) and thus opens towards the inlet (1). 10 · Control device according to claim 9 »characterized in that the plunger (32) and the sleeve (5) are in the Bore are arranged to one another in such a way that the applied to the closed end (1 a) of the bore (31) Fluid pressure pushes both the plunger and the sleeve out of the bore up to their stop, that the plunger (32) carries an enlarged head (36) which closes the gap from the inlet (1) »and that the exerted by the operating handle (6) on the plunger (32): pressure the plunger into the sleeve (5) to the limit of its Movement moves, with the enlarged head (36) lifting from the sleeve end and the fluid pressure from Inlet (1) both to the side and to one end dee Relay valve lets through and further pressure applied by the operating handle (6) both the plunger (32) and the sleeve (5) ^. ^ u ^^^ Xjff ^^ gf of one end of the relay valve vÖn ^ taiöBphäreateack. ^ bewjag.tj 11 β Control device according to claims 5 to 1O _9, characterized in that the relay valve cylinder closed at one end (4) is connected with an opening via a channel (3) to the bore (31) in order to move the body (7) admitting and discharging serving fluid pressure, said relay valve cylinder being open at the other end to discharge discharge and scavenging air from the engine (13) to the atmosphere via an outlet, the cylinder also being on different parts of the circumference in the same position has three openings along the cylinder »of which one is an inlet opening which communicates via a channel (11) with one (20) of the transverse openings in the bore side wall is connected, while the other two openings are outlet openings with two inlets of the motor (13) for its forward and reverse operation are connected, the reciprocating body (7) further having openings and internal channels (9, 22) which in one position of the body (7) connect the inlet opening to one of the outlet openings (25, 27), while the other outlet opening is in communication with the atmosphere, and in the other position of the Body (7) the connections to the outlet openings are reversed. 700862718.7.74