DE2343887C3 - Device for optional remote or local control of the working cylinders of a hydraulically operated crane, in particular a mobile crane - Google Patents

Description

The invention relates to a device for the optional remote or local control of each with a hydraulic Valve-connected working cylinder of a hydraulically operated crane, in particular a mobile stuff, in which each valve can be operated from a transportable actuator via an on Adjusting means acting connecting line is remotely controllable, and in which the valves for local control are each controllable directly by hand by means of an adjusting lever, the valves in each case according to an adjustment process automatically returned to its neutral starting position by a return means will.

For example, lifting, lowering, rotating as well

transmission means (22) from electrically operated coupling 25, if necessary, the buckling and buckling of the boom.

the extension and retraction of the telescopic section of the boom and the supporting effect a crane, especially a mobile crane, can be from the driver's seat and / or from the area of the Crane foot can be operated from, the latter having the advantage that the operator a sufficient Has an overview of the given situation, which is generally not the case from the driver's seat.

In addition, it is often desirable, especially in the case of mobile cranes, to also remove the working cylinder from to be able to remotely control a point from or within an area that is a not inconsiderable distance from the crane base. Such remote control is particularly necessary when the crane should be operated by a single person.

Such a device is known from US Pat. No. 3,559,817. In this known device the working cylinders of the crane can be connected to the valve of a working cylinder by actuating one

(16, 17, 18, 19) can optionally be coupled to the relevant linkage (11). and that in itself more familiar Way, the actual value achieved in each case of the adjustment of the control member (2) for the relevant Valve (1) is automatically compared with a setpoint that can be set on a setpoint generator and the shaft (3) coupled to the linkage (11) until the setpoint of the adjustment is reached is rotated automatically.

2. Device according to claim 1, characterized in that one associated with each valve (1) Linkage (II) is designed as a parallel linkage (13, 14, 12), the free end portion in each case the one parallel link (13) engages the coupling (16) for the relevant valve (1) and the free one End section of the other parallel link (12) with the control element (2) of the relevant valve (1) connected is.

3. Set up according to one or both of the

Claims, characterized in that 45 ordered hand levers are closely controlled. For the purpose of

that the couplings (16) each have a coupling bolt (17) which is in the uncoupled state is held by a spring (19) at a distance from the shaft (3), and in the coupled state against the force of the spring (19) from an electromagnet to be actuated by the actuating means (22) (18) into one of the valve (1) in question and running transversely to the longitudinal axis of the shaft (3) Bore (21) is inserted in the shaft (3).

4. Device according to one or more of the preceding claims, characterized in that that the transportable actuating means (22) is designed as a one-hand switch with which it is actuated a first handle (27) of an electrical multi-way switch, the electrical connection to the coupling (16) of the remotely controlled valve (1) for the selected working cylinder can be produced and the coupling (16) can be coupled which has a second handle (28) for adjusting the dem Adjustment path of the relevant control element (2) has the corresponding setpoint on the setpoint generator, and the one with a third handle (32) in the manner of remote control can be a remote control device to the Local control device are coupled. In this known remote control device, the adjustment means for the valves of the working cylinders as auxiliary hydraulic devices formed, with each working cylinder or valve such an auxiliary hydraulic device assigned. The auxiliary hydraulic equipment exist it consists of a cylinder with a manually operated working piston, which is connected via hydraulic lines and a pressure reservoir connected in a line to a second hydraulic component with a corresponding structure acts, which controls the valve of the working cylinder in question via levers.

This known control device is extraordinary laborious. In addition, it is designed in the manner of a belly-shaped control panel and is transportable Actuating means is very difficult and accordingly hampers the operator. This handicap is further enlarged by the fact that the connecting line emanating from the actuating means at several working cylinders consists of a larger number of hydraulic lines, so that the connecting line is not very flexible. In addition, the-

Direction very sluggish.

I of the DT-AS 1176813 and the DT-PS 1249483

• d therefore already electrohydraulic remote control ^units ! ⁿ . " _{En become} known, in which the remote control

Her hydraulic throttle slide for the valves ^ working cylinder takes place electrically, so that the operator is not hindered in such a way as this is in ker control device according to US-PS 35 59 817 of C ¹ H. These known control Einrichtunger, shall in any Ah not only relatively expensive, but they Γ- "also pn only for certain control devices" mission to find and are therefore not, for example,

Set without any noteworthy remodeling effort afterfSch to be attached to a crane that previously

nrh is not provided with a remote control. " ⁰ P ^ eTleS" hydraulic control for a winch

• , Z of the journal »Schiffbautechnik«, 1968, No. 9, c ? £ 2 became known. In this known Steuerfig one remote control can be the only one

on triggering (local) control lever of m transportable actuating means are carried out via a Su pre-control circuit, with an elek-Se Signal via an amplifier to a reversing • electric motor is given, which is a hydraulic sen il steer which on with the operation * - EeI connected maneuver valve is effective. Real the operating lever on the transport «-

. _{5 is} automatically compared with a target value that can be set on a setpoint generator and the value sent to the linkage

The coupled shaft is automatically rotated until the adjustment setpoint is reached.

The linkage trade assigned to each valve is preferably a parallel linkage, the free end section of the one parallel link engaging the coupling for the valve in question and the free end section of the other Faralie link being connected to the control element of the valve in question. In such a configuration are int fan an operator manually therefore in wesenthchen only the frictional forces in the joints of P. ^longside ^ ^stan _ß ge and the bearings of the shaft to overcome so that a direct local control is always carried out fe.nfuh strength. Due to the simple """h""^" components, with such a design not only a device that is considerably cheaper than known drives can be created, but also a device that is extremely robust and operationally reliable. .

The couplings are preferably each mn ^ e.nem

Coupling bolt provided, the m ^se '" ^ei T" ¹ ^ ^d ^ _s ^ _d Ie disengaged state by e.ner Feoer is kept at a distance from the shaft. and the in the coupled state against the force of the spring by an "by the" actuating means to be moved emf, jhcn Hek..0

^^ £ $ £ SSS Honoring in

Electric motor and causes the hydraulic valve 30 to be inserted into the shaft. , n its new ,, "* W ^ o ^". * - χ— ^

S, .uerei " _r ich, u" _g i _S , I »den here,

cause a corresponding failure-prone solution wur- 40 steue '' ^ 'produced tennis uf ^ _{of A.}

de, what for the relatively rough operation we er Welle e.nkuppe.bar ' ^st _z ^b _m ⁿ | ^z “ _which occurs with the adjustment in a mobile crane, to the greatest extent inappropriately

Seizure is based on the task of improving the control devices of the type described at the outset while avoiding their Nachte.le and to create such a device, de due to fewer, simpler and more elegant mechanical components auBerordentl.cn b.ll.g and is operationally safe. and as compact builds.nhe.i. without replacing the existing control valves or changing the setpoint, ^^ £? ^

nende dnt ^^^ _the arrangement so met-Scha er a sgeWdet _{only bd straight line}

fen .s. ^ez that d ^ ^e ^ ^e _{dhabe SWITCH ON} i _tba r and be.

S '^ ";" ^^ _driue n handle the shaft itselfNjhtbetaugen de dnt " _{u return} .

tat g '" ^lh " ^ ^eu <J ^, _da | _u ^ _{ommtn since} the one-ß Should m * ^m ™™ _{M [ch nerunler} fälll. that he-

should be possible. , iru.lisrhe Hebezeuetriebweike in which at Nichtbe-AIs solution to this problem is proposed erf.ndungsgem.B ^d ^ ^h _{e r} ^e ^ S5 _{abe the} control member in a load seen that for selectively remotely controlling the Vent.le ta ^l '8 ^{en ei} J ,, ^he _{is bracnt} are for. B. from the d "Adjusting means with a removable head : Nu We lung J

an »on

the,, ransporlablen Be.ä.igungsmmcl from ^{a drawing} "" ^{cr er} "

_des , ", attached _{to the crane}

F i g. Figure 2 is a side plan view of the device according to FIG. 1 in the direction of arrow II in FIG. 1,

F i g. 3 shows a plan view of the transportable actuating means, designed as a one-hand scarf in the manner of a handle switch, in the direction of arrow III in FIG. 4 and

4 shows a side view of the actuation means according to F i g. 3 in the direction of arrow IV in F i g. 3.

The drawing shows a device for optional remote or local control of each with a hydraulic Valve connected, not shown in the drawing, a hydraulic working cylinder also for the sake of simplicity not shown hydraulically operated mobile crane. Every working cylinder is a hydraulic valve connected to the hydraulic circuit, not shown for the sake of clarity 1 assigned to adjust the valve slide 2 serving as a control element by means of an adjusting means is.

The adjustment means consists of a hollow shaft 3. which is stored in bearings 4. The shaft 3 is driven by a direct current motor 6 via a gear 7 and a chain back gear 8 to rotate about its longitudinal axis 9.

To connect the shaft 3 to the valve slides 2 of the valves 1, a parallel linkage is provided for each valve 1 11 is provided, which consists of two parallel links 12 and 13 of a connecting rod 14, the end portions of which is articulated to the parallel links 12 and 13, respectively. The free end section of the parallel link 12 is connected to the valve slide 2 of the valve 1, while the free end portion of the parallel link 13 is connected to a coupling designated as a whole by 16, by means of which the shaft 3 must be coupled or uncoupled, as will be explained in more detail below.

Each coupling 16 has a coupling bolt 17. each of an electromagnet 18 against introduce the force of a spring 19 into a recess 21 running transversely to the longitudinal axis 9 of the shaft 3 is. The clutch 16 is by energizing the electromagnet 18 by a later reference on the F i g. 3 and 4 described actuation millels

22 electrically operated.

G of F i. 2 it can be seen that the shaft 3 is optionally to be coupled to each coupling 16 and thus optionally to be connected indirectly to each valve slide 2 and thus to be actuated.

When the shaft 3 is rotated, when a coupling 16 is eiiigekuppelt, the parallel linkage 11 is pivoted by an angle

23 upwards or an angle 24 downwards from the rest position, the relevant valve slide 2 is adjusted, as shown in FIG. 1 can be seen

At the same time, a potentiometer firmly connected to shaft 3 is adjusted, which is used as the actual value The actual value taken from the potentiometer 26 is used for adjusting the valve slide 2 is by means of a known and therefore not shown and described in more detail circuit arrangement with a setpoint set on a setpoint generator that is not shown and described in more detail compared automatically, with the presence of a difference value between the actual value and the Setpoint automatically to a corresponding rotation of the shaft and thus an adjustment of the valve Slide 2 comes

3 and 4 show the transportable actuating means 22, which is designed as a one-hand switch in the manner of a handle switch. The actuating means 22 has a non-recognizable electrical multi-way switch with which an electrical connection to the relevant coupling 16 for the relevant valve 1 of the working cylinder to be selected can be established with a first handle designed as a switch button 27. In addition, there is a second handle 28, designed as a back-up switch, with which the setpoint determining the adjustment path of the valve slide 2 in question can be set on the setpoint generator, with actuation according to arrow 29 causing, for example, a rotation of the shaft 3 to the left, during which the working cylinder extends, and an actuation in the direction of arrow 30 a rotation of the shaft 3 to the right, in which the working cylinder retracts.

The switch button 27 works together with contacts 31, which are each assigned to a specific electromagnet 18, so that in this way the electrical Establish connection and to interrupt the other magnets 16 with certainty. through which is ensured. that only one working cylinder of the crane is operated at the same time.

The actuating means 22 finally has a third handle 32, which is in the form of a dead man's switch is trained. If this switch is operated, i. h .. the in F i g. 4 recognizable button pressed, so the second handle 28 can also be operated effectively. Becomes the button of the third handle 32 released, the shaft 3 will automatically move into its position in FIG. 1 starting position drawn with solid lines moved back.

The operation of the device according to the invention is as follows: Each working cylinder or each Valve slide 2 of a valve assigned to the respective working cylinder can be activated by actuating a Shift lever 33, which represents an extension of a parallel link 12, can be operated. Here is the Remote control as such out of order.

If, on the other hand, a working cylinder is to be used by means of the remote control are operated, the electrical connection to the electromagnet is made on the switch button 27 18 produced, whereby this is excited and the coupling pin 17 assigned to it against the force of the The spring 19 is inserted into the corresponding recess 21 in the shaft 3. The coupling in question is 16 positively connected to the shaft 3.

Now, by means of the second handle 28, the shaft 3 can be set in left or right rotation by the drive 6,7.8 , the rotation taking place until the setpoint given by the second handle 28 corresponds to the actual value displayed by the potentiometer 26 Shaft 3 stops in position. She has pivoted the parallel linkage 11 either by an angle 23 or an angle 24, which corresponds to a certain adjustment path of the valve slide 2 of the associated valve 1, which in turn specifies the operating speed of the associated working cylinder actuated If this dead man switch is released, the shaft automatically rotates back to its starting position, which can be done both in the coupled state and in the disengaged state.

In this way, all - in the given case six - valves 1 and thus the the working cylinder assigned to the valves 1 is actuated

will.

The particular advantage of the inventive execution is that this can easily be connected to existing hydraulic cranes in the shortest possible time can be connected without having to replace the hydraulic system. Farther The fact that the operator

by means of the actuating means, which is designed as a small handle switch 22 and the electrical one leading from it to the crane, which is extremely thin and flexible Connection line 34 is practically not obstructed. Another advantage is that an actuation the shift lever 33 is easily possible.

For this purpose 2 sheets of drawings

Claims (1)

Patent claims: 1. Device for optional remote or local control each of the working cylinders connected to a hydraulic valve of a hydraulic operated crane, especially a mobile crane. with each valve optionally from a transportable one Actuating means can be remotely controlled via a connecting line acting on an adjusting means is, and in which the valves for local control each by means of an adjusting lever directly are controllable by hand, the valves each after an adjustment process by a return means are automatically reset to their neutral starting position, characterized in that dall for optional remote control of the valves (1) an adjusting means (16,3, II) with one of a reversible electric motor (6, 7) driven, common shaft (3) is provided that the shaft (3) in each case via a linkage (11) assigned to each valve (1) with the control element (2) of the relevant valve (1) can be connected and each via one of the transportable actuators known dead-man switch is provided, the second handle (28) only at simultaneous actuation of the third handle (32) can be actuated and when the third is not actuated Handle (32) the shaft (3) automatically returns to its neutral starting position (FIG. 1).