DE2326349A1 - ADJUSTMENT AND POSITIONING DEVICE FOR ONE MACHINE PART - Google Patents

Description

F 6683 DIPL. ING. DIETRICH LEWALD

PATENTASVf ALT

8 MUNICH 40

BIBKMJER STBASSE 6

COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS

CIT-ALCATEL 12, rue de la Baume, 75008 PARIS, (France)

ADJUSTMENT AND POSITIONING DEVICE FOR A

MACHINE PART

The invention relates to an adjusting and positioning device for a machine part.

The classic devices for adjusting and positioning a machine part consist of a hydraulic device, to which two elements belong. One is formed from a hollow body, the second is a piston, which is the inside of the Hollow body divided into two chambers, into each of which an outlet line of a control valve opens »One Clement the hydraulic device is firmly connected to the machine organ to be moved and is movable.

According to the current state of the art, the control valve "includes Technique a first and a second outlet line for a pressurized liquid ^ a supply line for

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the liquid and a first and a second return line for the liquid, a slide controlled by electromagnets and return springs and two working and can take a rest position. If the slide is in the rest position, no liquid will enter the outlet lines calmly. If the electromagnets are under voltage, the slide can be in one or the other working position after which of the two output lines is connected to the supply line, take. As soon as the machine organ has reached an end position, the electromagnets are automatically switched off.

The known device has several disadvantages First of all, it is difficult to control the speed of the movable element of the hydraulic device.

In addition, the sequence of movements is at the beginning (switching on the electromagnet) and at the end (switching off the Electromagnet) of the adjustment path is too brutal, which is not conducive to the proper functioning of the machine.

When the solenoid is switched off, the hydraulic device is not blocked, and an adjustment can occur of the machine organ.

The adjustment and positioning device for a machine part, which does not have these compartment parts, has a Control valve with a first and a second outlet line for the pressurized liquid ^ a supply line

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for the supply of hydraulic fluid and a first and second return line and a hydraulic device two elements, one of which is movable with respect to the other. One element consists of a hollow body, the second is a piston that divides the interior of the hollow body into two chambers, into each of which one of the outlet lines of the control valve opens. The moving element the hydraulic device is firmly connected to the machine part to be adjusted and positioned. The invention Device i, st characterized in that for hydraulic control valve

- a cylindrical sleeve in which a cylindrical slide slides between two extreme positions, the shoulders has, which divides the interior of the socket into several chambers 5 between a first and second shoulder is a Distribution chamber into which the feed line for the hydraulic fluid opens. A first reflux chamber lies between this first shoulder and a third; the first return line opens into this chamber. A second reflux chamber lies between the second and a fourth shoulder? the second return line opens into this chamber "

- A first and second cylindrical bore in the wall of the socket, the openings of which on the inside of the socket through the first or second shoulder, the width of which corresponds approximately to the diameter of these openings, can be closed; the first and second outlet line for the hydraulic

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liquid flow into these first and second bores; the The liquid pressure in the outlet lines then depends on the extent to which the openings of the bores are closed are; -

- two control chambers, the hydraulic oil content of which changes when there is movement of the slide changes in opposite directions *

- two control lines leading to a hydraulic control circuit belong and each lead in one of the tax chambers.

The adjusting and positioning device is further characterized in that the slide of the control valve is connected to the movable element of the hydraulic device via connecting parts.

In this way, the adjustment speed of the slide can be adjusted in both directions by appropriate dosing the fluid pressure in one or the other control line can be regulated very precisely.

With the help of the control valve, the hydraulic device braked at the end of the adjusting member, and any deviation from its end position releases forces that the Return the hydraulic device to its correct position.

Furthermore, the operation of the control valve can be controlled by changing the flow in the control lines be achieved and so above all that the starting movement the hydraulic device is not abrupt.

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The description of an exemplary embodiment of the invention follows with reference to the accompanying drawings.

1 shows the hydraulic control valve as it is in the adjusting and positioning device according to the invention is used for a machine part.

Fig. 2 shows the inventive adjustment and Position ionizing device.

The control valve 1 according to FIG. 1 has a cylindrical socket 2 _S inside in which a likewise cylindrical slide 3 slides - which has eight shoulders 4, 5, 6, 7, 8, ^c , and 11 that form the inside of the socket 2 divide into seven annular chambers 12, 13, 14, 15, 16, 17 and 18. The distribution chamber 12 lying between the shoulders 4 and 5 is supplied with hydraulic oil via the feed line 19.

via two cylindrical bores 22 and 23 in the socket 2 is the chamber 12 with two outlet lines 20 and 21 in connection. The diameter of the holes is slightly larger than the width of shoulders 4 and 5. The distance between the bores 22 and 23 is exactly as large as that between the shoulders 4 and 5 »so that the latter simultaneously the middle part of the openings 24 and 25 of the bores 22 and 23 in the inner wall of the socket 2 can close.

The control valve 1 also includes two return lines and 27 for the hydraulic oil, each of which goes into one of the return flow chambers 13 and 14, which adjoin the distribution chamber 12, open.

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The actual controls for the position of the slide 3 consist of two control lines 28 and 29? the each in one of the main chambers 15 and 16 lead by the Shoulders 6 and 8 or 7 and 9 are limited.

The main chambers 15 and 16 are circular Opening 30 or 31 in the slide 3 with a cylindrical Bore 32 or 33 in connection, which leads along the longitudinal axis from the end of the slide 3 into this.

Each of these bores is equipped with a movable piston 34 or 35 which presses against a stop 36 or 37 presses. The two attacks are only with one each End of the socket 2 firmly connected. The two stops 36 and 37 also limit the movements of the slide 3 in both directions at the same time.

Attention should also be drawn to a plate 38 with one end of the slide 3 is firmly connected and extends out of the socket 2 »

Furthermore, reference should be made to two discharges 39 and 40, which open into the chambers 17 and 18, which through the Schulte · 8 and 10 or 9 and 11 can be limited.

In Fig. 2, the inventive adjustment and Positioning device for a machine part shows appear only the components necessary to understand the invention.

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The device mainly comprises the control valve 1,

that is mounted horizontally on a frame 41, and one Hydraulic device 42, the piston of which is rigidly connected to the frame 41 and the horizontally movable hollow body 44 of which is firmly connected to the machine part to be adjusted, for example with a tool holder (not shown).

The hollow body 44 of the hydraulic device 42 is rigidly connected to a carrier 44 'on which two adjustable Stops 45 and 46 are mounted, which determine the adjustment path of the tool holder.

At the end of the adjustment path, the stops 45 and 46 abut a driver 47, which is at the end of a rod 48 sits, which slides horizontally in a cylindrical path in the frame 41 and the other end 49 with the slide 3 of the Control valve mechanically, reference 50, is connected.

The mechanical connection 50 consists of a lever 51? which is mounted vertically and around its pivot axis is rotatable. The end 52 of the lever 51 is articulated with the end 4? connected to the rod 48, the other end carries a notch 53 'in the one with the plate 38, the one Is extension of the slide 3 of the control valve, firmly connected pin is sufficient.

The lever 51 is vertical by the springs 55 Position kept in equilibrium.

The outlet lines 20 and 21 of the control valve 1 309849/0559 ./.

each open into one of the chambers 5 ″ or 57 of the hydraulic device 42 a._ -

The adjusting and positioning device also includes hydraulic supply and hydraulic feeders connected to the control valve 1 Control devices.

The Dl that flows in the supply line 19 of the control valve 1 is supplied by a pump P, which Dl pumps from a container R, into which the Dlrückflußlinien

26 and 27 and the derivatives 39 and 40 open.

The control lines 28 and 29 of the control valve 1 are to the pump P and the tank R via a four-way control valve 58 connected, with which the flow direction of the DI is between these two lines can be reversed by changing the voltage of the electromagnets associated with this control valve.

Each of these control lines 28 and 29 has a throttle valve 59 and 60, respectively and the control valve 58 has a pressure reducing valve 61.

Finally, the oil return lines 26 and

27 after their union is provided with a throttle valve 62 which is bridged by a binary valve 63.

The device according to the invention works in a consequent manner

As long as there is no mechanical on the slide 3 from the lever 51 Pressure and no other hydraulic control pressure is exerted, it assumes its equilibrium position,

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once the shoulders. 4 and 5 the openings 24 and 25 of the Close bores 22 and 23 so that there is a passage same size-between the distribution chamber 12 and each the two holes 22 and 23 remains free.

The hydraulic oil that got into the distribution chamber 12 is distributed evenly in two thin streams to the bores 22 and 23 »from where it flows in equal quantities into the reflux chambers 13 and 14 flows “so that the oil pressure into the Lines 20 and 21 remains constant and the hollow body 44 of the Hydraulic device 42 has not changed its position.

. When the control valve 58 assumes the position shown in Figure 2, the oil under pressure is passed through the control line 28 into the chamber 15 and S.qh cavity 32; It TTBT a pressure on the piston 34 from _r presses against the dash 36? the slide 3 then moves to the right until it hits the stop 37.

The pressurized oil of the distribution chamber 12 flows through the bore 23 and the line 21 into the chamber 57 of the hydraulic device 42? whereupon the body 44 this device moved to the right *

The oil in the chamber 56 of the hydraulic device flows through the line 20 and the bore 22 into the reflux chamber 13 back.

It is clear that it depends on the position of the slide 3 which positive or negative value the Oil pressure difference between lines 20 and 21 assumes.

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As long as the slide 3 by the hydraulic pressure remains in contact with the stop 37 in the cavity 32 is that Constant amount of oil flowing into the chamber 57 of the hydraulic device in a unit of time, and the hollow body of this device moves to the right at a steady speed, moving the stops 45 and 46 along with the ones before can be adjusted to the hydraulic body.

But if the stop 45 takes the finger 47 of the rod 48 with it, the rod moves to the right and in turn takes the end 52 of the lever 51 with it, so that the pin 54 of the plate 38 is pressed to the left through the right side of the notch 53 , whereby the slide 3 gradually returns to its equilibrium position, whereby the body of the hydraulic device at the end of the sequence of movements (position according to FIG. 2) is braked in an effective manner.

Any slight movement of the body 42 of the hydraulic device to the right has a slight movement of the Slide 3 out of its equilibrium result, and The pressure in the line 20 then exceeds the pressure in the line 21, so that oil enters the chamber 56 of the hydraulic device 42 arrives, which brings the body 56 of the hydraulic device 42 back into its stop position. The slide 3 then takes up its equilibrium position again under the action of the oil pressure in the chamber 15.

In the same way, a slight movement of the

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Body of the hydraulic device 42 to the left to release of the slide 3 * which moves to the right under the effect of the pressure prevailing in the chamber 15. The pressure ± n of the line 21 then exceeds the pressure in the line 20, so that the body of the hydraulic device follows again. moves to the right and resumes its stop position, the slide returning to its equilibrium position slides back.

Is the flow direction controlled with the help of control valve 5? conversely, the pressurized oil arrives into the control chamber 16 and the slide 3 moves to the left until it hits the left stop 36.

The oil pressure in line 20 is then greater than in line 2t, and the body of the. Hydraulic device moves to the left until the. Stop 46 hits finger 4-7. The rod 48 slides slightly to the left and thereby presses the end 52 of the lever to the left, so that the left side of the notch 53 presses on the pin 54, whereby the slide 3 returns to its equilibrium position. Any slight movement of the body of the hydraulic device out of its stop position has the consequence that a reaction that is the opposite of the case at hand leads the body of the hydraulic device back into its stop position.

With the throttle valves 59 and 60, the speed of the control valve slide 3 can be regulated in both directions will.

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The pressure reducing valve 61 allows the through the stops 45 and 46 to change the pressure exerted on the finger 47. It is important to put this pressure on one proper functioning to limit sufficient value, especially if the stops are rotatably mounted and are must rotate while touching with your finger.

With the aid of the throttle valve 62, the adjustment speed of the body of the hydraulic device can be regulated will. You have the option of using this throttle valve with the To bypass valve 63 when the body of the hydraulic device is to be adjusted quickly.

In the inventive device can with the Control valve with a constant, adjustable speed a machine part can be moved within certain limits with the help of adjustable stops.

Furthermore, the movement is smooth at the beginning, since the speed of movement of the control valve slide is corresponding can be regulated.

The control valve ensures that the body of the hydraulic device is effective and gradual is braked towards the end of the adjustment path.

The device according to the invention can be used for this be able to adjust and position the support or tool holder of copier and other lathes, or, in more general terms, for adjustment or positioning

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any machine part that is moved by a hydraulic device.

Depending on the application, certain data and shapes of the control valve can be changed, e.g. elliptical bores, Cast iron design, size of the bores, especially the diameter in the direction of the longitudinal axis of the control valve, which is shown in in certain cases equal to or approximately, s can be greater than the width of the shoulders.

The control valve can also be used if the function of the supply and return lines is reversed is, then a reflux chamber between two distribution chambers, would be.

Certain parts of the actuating and positioning device can be replaced by parts? the same or perform equivalent technical functions. In particular, a hydraulic device can be selected whose piston movable and firmly connected to the machine part to be adjusted, while the body maintains a fixed position and is firmly connected to the control valve.

-Patent claims-

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Claims (7)

PATENT CLAIMS \ 1J Adjusting and positioning device for a machine part, consisting of a control valve with a first and second outlet line for a pressurized fluid, a supply line for the fluid and a first and second return line for the hydraulic fluid, and a hydraulic device made of two elements, one of which is movable with respect to the other, one of the elements being a hollow body, the other being a piston which divides the interior of the hollow body into two chambers, into each of which one of the outlet lines of the control valve opens, and wherein the movable element is rigidly connected to the machine part to be adjusted and positioned, characterized in that the hydraulic control valve (1) has the following elements: - A cylindrical socket (2) in which between two end positions a cylindrical slide (3) slides, which has shoulders that divide the interior of the bushing into several chambers, of which a distribution chamber (12) into which the supply line (19) opens, between a first and second shoulder (4, 5), a first reflux chamber (13), iri the first Return line (26) opens between the first and one third shoulder (4, 6), a second reflux chamber (14) into which the second reflux line (27) opens, between the second and fourth shoulder (5, 7), 309849/0559 ' ^{/ m} - Furthermore in the wall of the socket (2) a first and second circular bore (22, 23), the openings (24, 25) in the Inner surface of the socket from the first and second shoulder (4, 5), the width of which is almost equal to the diameter of the openings (24, 25) can be closed, the first and second outlet lines (20, 21) for the pressurized Liquid open into the first and second bores (22, 23) and the liquid pressure depends on the degree of closure of the Openings (24, 25) of the bores (22, 23) depends, - two control chambers, the contents of which are inversely proportional change when the slide (3) moves, - And finally two control lines (28, 29) that are connected to one Control hydraulic circuit are connected and each open into one of the two control chambers, - and finally connecting elements that connect the slide (3) of the control valve (1) to the movable one. Element (44) of the hydraulic Connect device (42). 2. Adjusting and positioning device for a machine part according to claim 1, characterized in that that the connecting elements include two adjustable stops (45, 46), which on one with the movable Element (44) of the hydraulic device (42) firmly connected carrier (44 *) are mounted, as well as one in the longitudinal direction movable rod (48), one end (49) of which is mechanically connected to the slide (3) and the other of which End of a finger (47) bears that of one of the stops 309849/0559 (45, 46) is taken along when the machine part to be adjusted arrives at the end of the adjustment path. 3. Adjusting and positioning device according to one of the preceding claims, characterized in that each of the two control chambers of the control valve contains a main chamber (15, l6) of constant content, which is between two shoulders (6, 8 or 7, 9) of the slide ( 3) and is connected via a bore (30, 31) in the slide with the front of a cylinder (32, 33) drilled in the longitudinal direction of the slide (3), while a piston is located in the rear part of this cylinder (32, 33) is that in the cylinder (32, 33) slides and against one end face of the bushing fixed stop (2) connected (36, 37) presses, and _{characterized}} that the cylinders (32, 33) at opposite end faces of the slider (3) are attached. 4. Adjusting and positioning device according to one of the preceding claims, characterized in that that the control hydraulic circuit includes a control valve (58) that controls the direction of flow of the hydraulic fluid can reverse and that the control lines (28, 29) of the control valve (1) with the outlet of a liquid pump (P) and with a liquid container (R). 5. Adjusting and positioning device according to claim 4, characterized in that each control line (£ 8> 29) with an adjustable throttle valve (59j 60) is provided. 309849/0 55 9 6. Adjusting and positioning device according to claim 4, characterized in that in the line between the pump (P) and the control valve (59) a pressure reducing valve (6l) is installed. ' 7. Adjustment and positioning device according to Claims 1 to L, characterized in that that the supply line (19) of the control valve (1) are connected The outlet of the pump (P) is connected and that the return lines (26, 27) of the control valve (l) unite and in their common line part, which is in the fluid tank (R) opens, an adjustable throttle valve (62) is installed, which is short-circuited with a binary valve (63). 309.849 / 0559