EP1382796B1 - Hydraulic rotating motor with cable duct and vehicle with such a motor - Google Patents

Abstract

The hydraulic rotary motor has working pressure chambers (27) supplied with a hydraulic fluid for providing rotation of an output shaft (26) for rotation of an electrical load, e.g. an electromagnet, supplied via electrical leads (19,20) fed through the stationary head (9) of the motor, with a slip-ring device (2,3,4,5,6,7,8) between the stationary head and the output shaft. An independent claim for a mobile vehicle with a hydraulic rotary motor for rotation of an electrical load is also included.

Description

The invention relates to a hydraulic rotary motor with cable bushing and a Excavator or crane or an envelope machine with such a rotary motor.

Cranes, excavators or transhipment machines, in particular mobile such vehicles / Machines are used in the most diverse areas in the area of goods handling, handling of scrap metal, wood, recycled materials, demolition or construction industry used. For such vehicles / machines, which are not insignificant Acquisition costs mean for the operator, for as many diverse tasks as possible can be used, at the arms often several different Work tools or even multifunction heads attachable. These work tools or the multi-purpose heads must be for the different tasks be rotatable arm of the crane. For this purpose, hydraulic rotary motors are used, which have, for example, circulating working pressure chambers, which in Circumferential direction by means of a distributor in succession with a hydraulic fluid be fed, so that in this pressurization of the Arbeitskammem with Hydraulic fluid creates a rotational movement, which on the rotor and consequently is transmitted to the working tools connected to the rotor. A rotary motor This type (toothed ring construction) is described for example in DE 42 02 466 C2.

In an environment such as cargo handling, recycling, construction or at scrap yards, extremely rugged operating conditions exist. These are the hydraulic lines in the arm of the vehicle / machine up to laid the rotary motor and also continued to work tools, so that both the rotational movement and the movement of the working tool, for example for Opening and closing of blades can be realized hydraulically. There are also a number of work tools, in which in addition to the hydraulic supply and additional Cables are required for supply with drive current or with control current. Both known rotary motors and known vehicles, cranes or machines, in which Such rotary motors are used, there is an external separation between hydraulic drive and electrical supply. For example, at one Work tool in the form of an electromagnet power cable around the spin motor outside around to the electromagnet, which is below the rotary motor on the crane arm located, guided. In the tough conditions of use is damage to a external power cable can not be excluded. An external power cable that is in the rugged use is damaged, however, poses a strong threat to the For example, in the field of a junkyard working people.

The invention is therefore based on the object, a hydraulic rotary motor for Propulsion of work tools on a vehicle, crane, a machine as well Vehicle, crane, a machine with such a hydraulic rotary motor create in which the supply lines for electric drives or controls protected by additional units or for special functions of the working tools are that they can not be damaged even under tough conditions, so that hazards are avoided, for example due to electric shock.

This object is achieved with a hydraulic rotary motor with the features according to Claim 1 and with a vehicle having the features of claim 10. Expedient developments for the hydraulic rotary motor according to the invention are defined in the dependent claims.

The rotary motor according to the invention for driving work tools is used in particular also for driving the movement of a on a vehicle / a machine / a crane, preferably on a mobile vehicle, attached electrical consumer, such as for example, an electromagnet. The rotary motor has a known type Working pressure chambers, which pressurizes with a hydraulic fluid be, so that thereby an output shaft is placed in a circulating motion. The Output shaft is mechanically connected to the work tools, so that their Rotary motion is transmitted to the working tool. The electrical supply for one electrical consumer or for a working tool with an electrical Consumer is done by a designated from the outside in a power housing as well Head of the rotary motor introduced and through the interior of the rotary motor to the Consumer led supply line. This supply line is relatively easy in the head of the Rotary motor can be introduced if according to a first embodiment, the head of the Rotary motor is stationary. The interior of the rotary motor is opposite to the Hydraulic circuit insulated so that even in the event of a cable break, for example in the Supply line under-current setting of the entire motor can be avoided. from stationary head of the rotary motor is preferably via a brush-slip ring device the power supply through the interior of the rotary motor, preferably by The output shaft is guided, leaving a live cable centrally from the output shaft can exit at the side facing away from the head of the rotary motor and thus is connectable to the electrical load. On the one hand it is possible that one direct power supply for an electrical consumer or for certain Functions on a working tool, which advantageously by means of electric motors are executable, can be performed by the rotary motor. It is, on the other hand, too possible that lines for transmitting a control signal or control current for corresponding actuators, for example, on a multi-function head through the Rotary be performed. This ensures that even in robust use live lines, and even those which only for the transmission of Control currents or control signals are used, are protected inside the rotary motor.

Preferably, the rotary motor in a per se known design revolving Working pressure chambers and is designed in toothed ring construction. One with the Output shaft existing rotor meshes with a rotor ring and forms between the Working pressure chambers, with rotor and rotor ring held between distributor plates are, via which the supply of the working pressure chambers with hydraulic fluid.

The working pressure chambers are successively in the circumferential direction with hydraulic fluid provided.

In stationary arranged, the current housing of the rotary motor forming head is as Insulator formed cable holder, over which the current from the brush-slip ring device is passed through the engine. In principle, it is possible that the brushes are located at the head of the rotary motor, whereas the slip ring or the Slip rings on a region of the output shaft guided in the area of the head are arranged. Of course, the reversal is possible, that is the Slip rings are arranged on the stationary head of the rotary motor, whereas the Brushes arranged on the output shaft or connected to a part of the output shaft are. Of course, for the immediate power supply as well as for the Transmission of control currents or signals different parts of such Brush-slip ring device or more even different such devices intended.

Preferably, the output shaft, which is preferably designed as a flange shaft, centrally provided with a bore for easy connection of the work tools, through which the current-carrying lead is guided. However, it is also possible to separate Provide channels in the central region of the output shaft of the rotary motor, so that the current-carrying leads, for example, in such a channel or in several Channels is or are, whereas the lines for control signals or for Control currents can be performed in different channels. It is understood that in the event of the leakage of cables outside the immediate central area Output shaft is required on the opposite side of the head of the rotary motor, also preferably to provide a brush slip ring device. This depends However, of the respective construction of the working tool or the electrical Consumer.

Particularly preferred is the use of a hydraulic according to the invention Rotary motor in a vehicle, a machine, a crane, which or a Electromagnet has, that is, a vehicle which, for example, in Scrap area is used. In such a vehicle with an inventive Hydraulic rotary motor, a so-called electric motor, and an electromagnet as Work tool, it is particularly advantageous because of the extremely rough Operating conditions the magnetic cable completely protected by the rotary motor pass therethrough.

Further advantages, features and applications of the invention will now be Reference to an embodiment with reference to the accompanying drawings explained in detail.

Figur 1 einen Längsschnitt durch einen hydraulischen Drehmotor gemäß der Erfindung;

Figur 2 eine Draufsicht auf einen geöffneten Kopf des Drehmotors gemäß Figur 1.

In the drawing show:

Figure 1 shows a longitudinal section through a hydraulic rotary motor according to the invention;

FIG. 2 shows a plan view of an opened head of the rotary motor according to FIG. 1.

FIG. 1 shows a longitudinal section through a rotary motor according to the invention. This rotary motor has a trained as a power housing head 9, an engine head 25, a rotor housing 23, a motor housing 21 and designed as a flange shaft Output shaft 26 from. Compared to a conventional, not as an electric motor trained rotary motor, the rotary motor according to the invention therefore has a two-part Upper part, namely designed as a power housing head 9 and the engine head 25th The head 9 is in a conventional manner to the motor head 25 with bolts at the Outside circumference bolted. An unspecified additional pin ensures that at the mounting of the head 9 on the engine head 25 always the correct positioning is guaranteed.

Trained as the output shaft 26 flange threshold includes on the one hand down to the Motor off and offers a support ring 18, the possibility of connecting hydraulic tools to be supplied hydraulically. The output shaft 26 is through the Interior of the engine, d. H. through the motor housing 21, through the rotor housing 23 and through the motor head 25 into the trained as a power housing head 9. By the entire length of the output shaft 26 is guided a central bore 30. Am in the Head 9 projecting end of the output shaft 26 is an attached to this end, d. H. placed over the end, in cross-section U-shaped holder arranged. This holder 12 is located by means of a located on this end of the output shaft 26 Placed tooth assembly, wherein it is equally possible, the holder 12 on the Screw on the end of the output shaft 26.

On the outside of the holder slip rings 2, 3 are arranged, which in particular from Brass are formed. The holder 12 for the slip rings 2, 3 is thus removable. The holder 12 for the slip rings 2, 3 is thus rotationally fixed to the output shaft 26th connected.

On the slip ring 2 is a screw 5 as a terminal for a first cable 19th provided, whereas on the slip ring 3, a screw 4 as a terminal for a second cable 20 is provided. The cables 19, 20 are from the terminals the slip rings 2, 3 passed through the central bore 30 of the output shaft 26 and exit in the central region of the output shaft 26. Thus, the inside of the Rotary motor guided cable designed as supply lines for an electrical Consumers are fully protected to the outside and can from the central exit point be performed from the output shaft 26 directly in the electrical load without the Cable accessible from the outside for damage due to a rugged or rough use is.

The supply line of the power supply or control power supply in the as an electric motor trained rotary motor takes place in the head 9 by laterally mounted holes, through which a first power cable 10 and a second power cable 11 are guided. Both Power cables 10, 11 are connected to a first double brush holder 6 and a second Double brush holder 7 out. Both the double brush holder 6 and the Double brush holder 7 are attached to a trained as a bolt 8 centering. Everyone Double brush holder 6, 7 carries at each end in each case a brush 28, 29 (see Figure 2). The brushes 28, 29 of the double brush holder 6, which with current through the power cable 10th be supplied, are in contact with the slip ring 2, whereas the brushes of the Double brush holder 7, which are powered by the power cable 11 with Storm, are in contact with the slip ring 3. Thus, the external power supply through the Power cable 10 via the first double brush holder 6, the brushes or coals 28, 29, ensures the slip ring 2 and the cable 19 to a first consumer. About the Power cable 11, the double brush holder 7 and its brushes and the slip ring 3 and the cable 20, the supply of another consumer is possible. However, it is also possible that only a single power line is guided by the rotary motor. The Central bore 30 through the output shaft 26 may be formed so that also even more example, control cables can be passed through. The of the respective slip rings 2, 3 connected cables 19 and 20 are connected via a Cable holder 1, which may be formed as an insulator, in the interior of the output shaft 26, d. H. guided in the central bore 30.

The rotary motor itself has in a conventional manner a rotor 14 A, which on the output shaft 26 is either fixed or sitting by means of a tooth connection. This rotor is designed as a toothed rotor, wherein at the, trained on its outside Gearing a rotor ring 14 B engages. Between the rotor 14 A and the rotor ring 14th B form working pressure chambers 27 during rotation of the rotor, wherein the Rotor ring with a toothing located in its outer side in the rotor housing 23 supported. Above and below the rotor 14 A and the rotor ring 14 B are Distributor plates 13, 15 arranged. About the distributor plates are the Working pressure chambers 27 in the circumferential direction successively with pressurized Hydraulic fluid is fed, so that the pressure energy of the hydraulic fluid in rotational energy can be converted and the output shaft 26 via the rotor 14 A in one Rotation movement can be offset. The hydraulic fluid is doing over a Terminal 31 via the distributor plate 13 to the working pressure chambers 27 fed. Above and below the respective distributor plates 13 and 15 are corresponding Rolling arranged. The rolling bearings are tapered roller bearings 24 and tapered roller bearings 17 trained. Between the tapered roller bearing 17 and the lower distributor plate 15 is Furthermore, a shaft nut for clamping or centering of the output shaft 26 in Interior of the rotary motor provided. The shaft nut 22 is at this Embodiment preferably directly on the inner race of the tapered roller bearing 17 braced.

At the lower end of the motor housing 21 is on the outer circumference of the support ring 18th provided, which is on the outside of the flange of the flange shaft trained output shaft 26 is supported. The support ring 18 is the screw with a working tool to be rotated by the rotary motor.

Figure 2 shows a plan view of the invention shown above opened Rotary engine. The head 9 has a cover under conditions of use, which the Brush slip ring device (2, 3, 4, 5, 6, 7, 8, 28, 29) covers and thus the according to the invention, designed as an electric motor rotary motor closes upwards. By the head 9, the power cables 10, 11 are guided laterally into the interior of the rotary motor. in the Inside the rotary motor, the power cable 10 to the double brush holder 6 by means of a not designated terminal led. The double brush holder 6 is on as Centering trained bolt 8 centered and carries at its two arm-shaped formed ends each have a brush 28 and 29. By spring force, the brushes 28, 29 pressed against the slip ring 2, of which by means of the screw 5 in the form of Terminal led the cable 19 through the central bore of the output shaft 26 is.

Of course, it is readily possible, in the end region of the output shaft 26, which projects into the region of the head 9, the slip rings either directly on the To arrange output shaft, or to arrange circumferential brushes, which with Sliding contacts are in contact, which via a corresponding holder with the Power cables 10, 11, which are guided from the outside into the head 9, are in contact.

The current motor according to the invention thus offers the possibility, in addition a supply of hydraulic power units with hydraulic energy both a Rotary movement for the hydraulic accessories and a power supply provided by the hydraulic motor for electrical consumers. This is one compared to conventional rotary motors significantly more flexible usable novel Rotary engine provided, which in addition to the high flexibility and a new degree Reliability with regard to the complete avoidance of damage creates live cable.

List of reference numbers

1

cable holder

2

First slip ring

3

Second slip ring

4

Screw for supply / cable 20

5

Screw for cable / cable 19

6

First double brush holder

7

Second double brush holder

8th

Bolt for centering the double brush holder

9

head

10

Supply line / first power cable

11

Supply line / second power cable

12

Holder for the slip rings

13

distribution plate

14 A

rotor

14 B

rotor ring

15

distribution plate

17

Tapered roller bearings

18

support ring

19

Supply line / first cable (to a first working device)

20

Supply / second cable (to a second implement)

21

motor housing

22

shaft motor

23

rotor housing

24

Tapered roller bearings

25

motor head

26

output shaft

27

Working pressure chamber

28

brush

29

brush

30

Central drilling

31

Hydraulic fluid port

Claims (10)

1. A hydraulic rotating motor for the driving mechanism of tools, especially for the driving mechanism for moving an electricity consumer mounted at a vehicle, especial at a mobile vehicle , especially electromagnets, with working pressure chambers (27), which is pressure-acted upon by hydraulic fluid for producing rotational movement transferred to a driven shaft (26),
   characterized in that the electricity for said consumer is brought in by a lead (19,20) passed from the outside into a stationary head (9) of the rotating motor and is supplied through the interior of the rotating motor to the consumer.
2. The hydraulic rotating motor of claim 1, for which the working pressure chambers (27) revolve and are acted upon with the hydraulic fluid consecutively in the peripheral direction by means of a distributor, a rotor (14 A), which is connected to the driven shaft (26), and a rotor ring, which meshes with the rotor (14 A), between one another and two distributor plates, forming the working pressure chamber (27).
3. The rotating motor of claims 1 or 2, for which the lead between the head (9) and the driven shaft (26) has a brush-slip ring device (2, 3, 4, 5, 6, 7, 8, 28, 29).
4. The rotating motor of claim 3, for which the head (9) carries the brushes (28, 29) and the driven shaft (26) carries the slip rings (2, 3).
5. The rotating motor of claim 3, for which the head (9) carries the slip ring (2, 3) and the driven shaft (26) carries the brushes (28, 29).
6. The rotating motor of one of the claims 1 to 5, for which the lead (19, 20) is passed in the interior of the rotating motor through the driven shaft (26) and emerges essentially centrally on the side of the motor facing the consumer.
7. The rotating motor of claim 6, for which the driven shaft (26) is constructed as a flanged shaft.
8. The rotating motor of one of the claims 1 to 7, for which the lead (19, 20) is a magnet cable for supplying an electromagnet.
9. The rotating motor of one of the claims 1 to 8, for which the lead (19, 20) has at least one lead for control currents, especially for actuating and/or controlling actuators, especially multifunction heads.
10. A vehicle having a hydraulic rotating motor of claims 1 to 9 for driving a consumer of electricity, especially electromagnets or multifunction heads, for which leads, protected towards the outside, and supplying electricity, are passed within a radial arm into a head (9) of the rotating motor and, from there, through the interior of the rotating motor up to the consumer.

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