EP2460758A1 - Hydraulic rotation drive - Google Patents

Abstract

The hydraulic rotary drive (1) has a shaft (10) and a fastening element (11) for connecting the shaft with the load receiving element or a crane arm. A shaft bearing (20) has another fastening element (21) for connecting the shaft bearing with the crane arm. The shaft or the shaft bearing has a recess (5) is provided, in which the sliding contacts device (2) is partially accommodated.

Description

The invention relates to a hydraulic rotary drive for rotating a load-receiving means relative to a crane arm, according to the preamble of claim 1.

Furthermore, the invention relates to a crane with a rotary drive according to the invention and a harvester with a crane with a rotary drive according to the invention.

Generic rotational drives, such as with an attached gripper as a load-handling device, find application in numerous fields. Often it is the moving load to bulky items such as logs or pipes or the like. Particularly preferred such rotary drives are used in cranes, which are mounted on vehicles such as in Holzvollerntern, taken from English also called Harvester. Likewise, such rotary drives are also used stationary, such as in waste incineration plants or in the construction industry. The hydraulic rotary drive is operated via a hydraulic device, which usually leads from a crane arm to the rotary drive.

So shows about the EP 1 889 808 B1 20 February 2008, a crane arm with a mounting device for tools, said fastening device along a vertical axis spaced rotary joints with a crane arm side hinge and a work equipment side pivot, said crane arm hose lines lead to terminals in a arranged between the implement and the implement side rotary joint hydraulic rotary drive. This rotary drive is limited in its applicability to such load-carrying devices that are not dependent on an electrical supply.

The object of the invention is to provide an improved hydraulic rotary drive for rotating a lifting device relative to a crane arm, which is characterized by a broader usability.

This is solved by the features of claim 1.

This therefore means that a recess is provided in the shaft and / or in the shaft bearing, in which the Gleitkontaktiervorrichtung is at least partially received. By means of the hydraulic rotary drive according to the invention, it is also possible to use those load-carrying devices which require an electrical supply.

The Gleitkontaktiervorrichtung is at least partially not disposed outside of the shaft or the shaft bearing and thereby contributes to smaller dimensions of the hydraulic rotary drive, resulting in a more compact design of a hydraulic rotary drive.

It is also achieved that the Gleitkontaktiervorrichtung is protected against external forces, since the shaft or the shaft bearing, the Gleitkontaktiervorrichtung protectively surrounds.

Further advantageous embodiments are defined in the dependent claims.

It has proven to be particularly advantageous if the sliding contact device is received substantially completely in the recess. By completely introducing the Gleitkontaktiervorrichtung in the recess of the shaft or the shaft bearing an even more compact design for a hydraulic rotary drive can be achieved.

According to a preferred embodiment it can be provided that the power supply to Gleitkontaktiervorrichtung substantially axially in the shaft and / or runs substantially radially in the shaft bearing or vice versa. As a result, a particularly protected installation of the power supply can be achieved.

Furthermore, it can preferably be provided that a protective housing for the - preferably axial - power supply and / or the current discharge is provided. Due to the design of a protective housing damage to the power supply during operation can be prevented.

It has proved to be particularly advantageous if the shaft projects beyond the shaft bearing at an end of the rotary drive facing the load receiving means. This makes it possible on the one hand, the load-receiving means can be attached to one of the fastening means in a simple manner and on the other hand, that the current discharge from the Gleitkontaktiervorrichtung can be made directly through the shaft.

Particularly preferably, it may be provided that the current discharge from the Gleitkontaktiervorrichtung is formed on the load receiving means facing the end of the rotary drive and leads away laterally from the rotary drive. Due to the lateral routing of the current discharge, this can take place independently of a load-receiving means attached to the first fastening means.

It has proven to be particularly advantageous if the lateral current discharge from the Gleitkontaktiervorrichtung leads away substantially radially or obliquely in the direction of the load receiving means facing the end of the rotary drive.

According to a preferred embodiment it can be provided that the Gleitkontaktiervorrichtung is formed on the load receiving means facing the end of the shaft. This can be achieved that the Gleitkontaktiervorrichtung - such as for maintenance purposes - is easily accessible.

It has also proven to be advantageous if the shaft is designed as a rotor and the shaft bearing as a stator.

It has proved to be advantageous if the Gleitkontaktiervorrichtung has at least one - preferably four - slip ring (s) and at least one - preferably four - sliding contact (s). The formation of a Gleitkontaktiervorrichtung with slip ring and sliding contacts is particularly stable and easy to manufacture.

Preferably, it may further be provided that the - preferably the four - slip ring (s) is (are) attached to a bearing of the protective housing and that the - Preferably, the four - sliding contact (s) is attached to the shaft (are). The arrangement of the slip ring on the stationary part of the rotary drive and on the other hand by the arrangement of the sliding contact on the rotating part of the rotary drive lower moving masses can be achieved.

According to a possible embodiment it can be provided that a connection of the current discharge to the Gleitkontaktiervorrichtung is provided, wherein the connection of the current discharge is formed in the recess. The direct connection of the current discharge to the Gleitkontaktiervorrichtung located in the recess also lower moving masses can be achieved because you can do without a plug or the like on the moving part of the rotary drive.

Protection is also desired for a crane having a hydraulic rotary drive for rotating a load-bearing means relative to a crane arm, wherein a crane arm is connected to the second fastening means of the hydraulic rotary drive.

Specifically, protection is desired for a harvester with a crane according to claim 13.

Fig. 1

eine Seitenansicht eines Harvesters

Fig. 2

eine perspektivische Ansicht eines hydraulischen Rotationsantriebes an einem Kranarm

Fig. 3

eine perspektivische Ansicht eines hydraulischen Rotationsantriebs

Fig. 4

ein Schnitt durch eine Vorderansicht eines hydraulischen Rotationsantriebs

Fig. 5

eine Untersicht des Rotationsantriebes von Fig. 4

Fig.6

eine Schnitt durch eine Vorderansicht eines weiteren Ausführungsbeispieles eines hydraulischen Rotationsantriebs.

Fig. 7

eine perspektivische Explosionsdarstellung eines hydraulischen Rotationsantriebs wie in Fig. 3

Fig. 8

eine perspektivische Explosionsdarstellung einer Welle

Fig. 9

eine Schnittdarstellung einer Welle im Wellenlager

Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawing. Show:

Fig. 1

a side view of a harvester

Fig. 2

a perspective view of a hydraulic rotary drive on a crane arm

Fig. 3

a perspective view of a hydraulic rotary drive

Fig. 4

a section through a front view of a hydraulic rotary drive

Fig. 5

a bottom view of the rotary drive of Fig. 4

Figure 6

a section through a front view of another embodiment of a hydraulic rotary drive.

Fig. 7

an exploded perspective view of a hydraulic rotary drive as in Fig. 3

Fig. 8

an exploded perspective view of a shaft

Fig. 9

a sectional view of a shaft in the shaft bearing

FIG. 1 shows the side view of a harvester 100 also known as wood harvesters. This harvester 100 has a crane 101. The crane 101, in turn, has a crane arm 102 to which, via a rotary joint arrangement 103, the load-receiving means 104, in this embodiment a woodworking device for cutting and trimming trees, is fastened. Between the rotary joint arrangement 103 and the load receiving means 104 of the hydraulic rotary drive 1 for rotating the load receiving means 104 is arranged relative to the crane arm 102.

FIG. 2 shows a crane arm 102, on which a rotary joint assembly 103 is arranged. Above the second fastening means 21 of the hydraulic rotary drive 1, this rotary drive 1 is connected to the crane arm 102. Here, the second fastening means 21 are formed as spaced-apart, double tabs, between each of which a crane arm 102 arranged on the counterpart piece can be inserted and rotatably connected by a bolt. As a result, the rotary joint assembly 103 is formed. In the embodiment shown, the rotary joint 103 is formed as a split pivot joint 103, so that there is a free space between the tabs. Of course, this would not have to be this way. Also conceivable would be, for example, a continuous bolt.

The hydraulic rotary drive 1 has a shaft bearing 20, in whose interior a shaft 10 is formed. The shaft 10 has first attachment means 11, via which the load-receiving means 104, not shown, can be fastened to the shaft 10.

In the interior of the shaft 10, the recess 5, not shown here, and the sliding contacting device 2 arranged therein are formed in this preferred embodiment (see in this regard FIG. 4 and FIG. 5 ).

On the one hand, the power supply 3 and on the other hand, the current dissipation 4 leads to the Gleitkontaktiervorrichtung not visible here (see Figure description of the FIG. 4 ).

FIG. 3 shows a perspective view of a hydraulic rotary drive 1, as just in FIG. 2 described. From this view, it is further clear that the hydraulic connections 51 and 52 are arranged on the shaft 10 for the supply of the load-receiving means 104, not shown. Otherwise, the under FIG. 2 With regard to the rotary drive 1 mentioned.

FIG. 4 shows a hydraulic rotary drive 1 for rotating a load-receiving means 104, not shown here (see FIG. 1 ) relative to a crane arm 102, not shown here (see FIG. 2 ) with a shaft 10 and a shaft bearing 20, first fastening means 11, on the load receiving means 104 facing the end 7 of the shaft 10 for connecting the shaft 10 to the load receiving means 104, and second fastening means 21, which are formed on the shaft bearing 20, for connecting the Shaft bearing 20 with the crane arm 102. In the shaft 10 wings 12 are arranged, which are acted upon to transmit a torque to the shaft 10 via an oil supply and oil removal with oil, as is well known in the art. The Gleitkontaktiervorrichtung 2 is electrically contacted with a power supply 3 and a current drain 4, wherein in this preferred embodiment, the Gleitkontaktiervorrichtung 2 in the recess 5 of the shaft 10 is substantially completely absorbed.

The recess 5 is completely encased in this preferred embodiment of the shaft 10 and thus also the Gleitkontaktiervorrichtung 2 is completely encased by the shaft 10.

For maintenance purposes, the Gleitkontaktiervorrichtung 2 is freely accessible from below, it is also conceivable that you can attach a cover here to close the recess 5 also down.

The power supply 3 extends in this preferred embodiment, first substantially radially to the shaft bearing 20 and then substantially axially in the shaft 10 to Gleitkontaktiervorrichtung 2. Preferably, a protective housing 6 is provided for the axial power supply 3. Of course, a corresponding protective housing for the radial power supply is possible, but not considered in this embodiment.

The shaft 10 is in this preferred embodiment on the load receiving means 104 facing the end 7 of the rotary drive 1 on the shaft bearing 20 addition. It can thereby be achieved that the first fastening means 11 are easily accessible in order to establish a connection of the load-receiving means 104 and the shaft 10.

In this case, the load-receiving means 104 is fastened via the fastening means 11 directly below the shaft 10 on the shaft 10.

The current discharge 4 of the Gleitkontaktiervorrichtung is formed in this preferred embodiment of the load receiving means 104 facing the end 7 of the rotary drive 1 and leads of this rotary drive 1 side 8 away. Here, the lateral path guide 8 of the current outlet 4 here at an angle of 30 to 60 ° to the longitudinal axis L of the shaft 10.

In this embodiment, the Gleitkontaktiervorrichtung 2 is formed on the load receiving means 104 facing the end 7 of the shaft 10, as well as it is of course conceivable - as in the FIG. 6 In practice, it has been found, however, that the preferred construction is such that the Gleitkontaktiervorrichtung 2 at the lower end of the shaft 10th is placed in the recess 5. In that in this FIG. 4 illustrated embodiment as well as in the in the FIG. 6 illustrated embodiment, the Gleitkontaktiervorrichtung 2 four slip rings 31 and 32 and also corresponding thereto sliding contacts 41 and 42. The slip rings 31 and 32 are fixed to a bearing 9 of the protective housing 6 and thus do not rotate with the shaft 10, the sliding contacts 41st and 42 are fixed to the shaft 10 and thus rotate with this. Of course, this could also be done the other way around.

The connection 43 of the current drain 4 takes place here in the interior of the recess 5 of the shaft 10 and not via a connector outside the shaft 10th

Particularly preferred is the hydraulic rotary drive 1 shown here in a Holzvollemter 100 - as in the FIG. 1 shown - used. Here, the hydraulic rotary drive 1 is arranged on a crane 101 for rotating the load receiving means 104 relative to the crane arm 102, wherein the crane arm 102 via the second fastening means 21 (see FIG. 2 ) is connected to the hydraulic rotary drive 1.

FIG. 5 shows the bottom view of the hydraulic rotary drive 1, just as in the at FIG. 4 illustrated embodiment.

From this view, it can be clearly seen that the Gleitkontaktiervorrichtung 2 is surrounded by the shaft 10 of the rotary drive 1 around. In this case, the Gleitkontaktiervorrichtung 2 and all its components, such as the slip rings 31 and 32 and the sliding contacts 41 and 42 disposed in the recess 5 of the shaft 10 and are enclosed by the shaft 10 and protrude preferably not on the lower end. 7 (please refer FIG. 4 ) of the shaft 10 and the rotary drive 1 addition.

FIG. 6 shows an alternative variant for a hydraulic rotary drive 1 for rotating a load-receiving means 104, not shown here relative to a crane arm 102, not shown here, as just in the FIG. 4 and 5 explained.

In this sectional view, it can be clearly seen that although the sliding contacting device 2 is likewise formed in a recess 5 of the rotary drive 1, this recess 5 is not arranged in the shaft 10 in this variant, but in the shaft bearing 20.

Thus, the Gleitkontaktiervorrichtung 2 is not accessible from the load side medium, but from the crane arm side.

This arrangement results in that the power supply 3 to the Gleitkontaktiervorrichtung 2 takes place radially, the current discharge 4, however, takes place in this embodiment, first axially protected by a protective housing 6 and then - as well as in the embodiment in FIG. 4 and 5 shown - laterally 8 away from the shaft 10. Of course, it would also be conceivable that the current discharge 4 is not laterally 8, but at the lower end 7 of the shaft 10. Otherwise also applies to this embodiment - as in the FIG. 6 represented - mutatis mutandis regarding the in FIG. 4 Illustrated embodiment mentioned. Unlike in FIG. 6 shown, the Gleitkontaktiervorrichtung 2 can also be arranged closer to the crankshaft end of the rotary drive 1, for example, between the tabs of the split formed pivot 103 (see also the description of FIG. 2 ).

In the FIGS. 7 . 8th and 9 will now be discussed in more detail on the drive of the hydraulic rotary drive 1, which is designed for transmitting a torque to the shaft (10) in the interior of the rotary drive 1.

FIG. 7 shows an exploded perspective view of the hydraulic rotary drive 1 as in the figure description of Figures 2 . 3 . 4 and 5 described. It applies that mentioned there.

Like in this one FIG. 7 is clearly visible, the shaft 10 is formed inside the shaft bearing 20 and inside the stator 50. On the shaft 10 eight wings 12 are formed in this preferred embodiment, as shown in the exploded view of FIG. 8 evident.

The wings 12 are spring-loaded (not shown) pushed out of the shaft 10 and extend to the inner wall 30 of the stator 50, wherein the inner wall 30 of the stator 50 has a deviating from the circular cross-section, as shown in the sectional view of FIG. 9 is apparent. As a result of the spring-loaded, axially movable design of the wings 12, a preferred guidance of the shaft 10 in the stator ring 50 can be achieved.

The wings 12 and thus the shaft 10 are driven by oil, which can flow pressurized in the interior 40 between the shaft 10 and the stator ring 50.

Thus, an extremely compact design of a hydraulic rotary drive 1 can be achieved.

Claims (14)

Hydraulic rotary drive (1) for rotating a load-receiving means (104) relative to a crane arm (102), with a shaft (10) having first fastening means (11) for connecting the shaft (10) to the load receiving means (104) or the crane arm (102), a shaft bearing (20) having second attachment means (21) for connecting the shaft bearing (20) to the crane arm (102) or the load receiving means (104), - in the shaft (10) arranged wings (12), which are acted upon for transmitting a torque to the shaft (10) via an oil supply and an oil removal with oil, a Gleitkontaktiervorrichtung (2) which is electrically contacted with a power supply (3) and a current discharge (4),
characterized in that in the shaft (10) andlor in the shaft bearing (20) has a recess (5) is provided, in which the Gleitkontaktiervorrichtung (2) is at least partially accommodated. Rotary drive according to claim 1, characterized in that the Gleitkontaktiervorrichtung (2) is substantially completely received in the recess (5). Rotary drive according to claim 1 or 2, characterized in that the power supply (3) for Gleitkontaktiervorrichtung (2) extends substantially axially in the shaft (10) and / or in the shaft bearing (20) extends substantially radially or vice versa. Rotary drive according to one of claims 1 to 3, characterized in that a protective housing (6) for the - preferably axial - power supply (3) and / or the current discharge (4) is provided. Rotary drive according to one of claims 1 to 4, characterized in that the shaft (10) on a load receiving means (104) facing the end (7) of the rotary drive (1) via the shaft bearing (20) protrudes. Rotary drive according to one of claims 1 to 5, characterized in that the current discharge (4) from the Gleitkontaktiervorrichtung (2) on the load receiving means (104) facing the end of the rotary drive (1) is formed and preferably by the rotary drive (1) laterally (8 ) leads away. Rotary drive according to claim 6, characterized in that the lateral (8) current discharge (4) of the Gleitkontaktiervorrichtung (2) leads away substantially radially or obliquely in the direction of the load receiving means (104) facing the end of the rotary drive (1). Rotary drive according to one of claims 1 to 7, characterized in that the Gleitkontaktiervorrichtung (2) on the load receiving means (104) facing the end (7) of the shaft (10) is formed. Rotary drive according to one of claims 1 to 8, characterized in that the shaft (10) is designed as a rotor and the shaft bearing (20) as a stator. Rotary drive according to one of claims 1 to 9, characterized in that the Gleitkontaktiervorrichtung (2) at least one - preferably four - slip ring (s) (31, 32) and at least one - preferably four - sliding contact (s) (41, 42) , Rotary drive according to claim 10, characterized in that the - preferably the four - slip ring (s) (31, 32) on a bearing (9) of the protective housing (6) is fixed (are) and that - preferably the four - sliding contact ( e) (41, 42) is secured to the shaft (10). Rotary drive according to one of claims 1 to 11, characterized in that a connection (43) of the current outlet (4) to the Gleitkontaktiervorrichtung (2) is provided, wherein the connection (43) of the current discharge (4) in the recess (5) is formed , A crane (101) having a hydraulic rotary drive (1) for rotating a load receiving means (104) relative to a crane arm (102) according to one of claims 1 to 12, wherein the crane arm (102) is connected to the second fastening means (21) of the hydraulic rotary drive (21). 1) is connected. Harvester (100) with a crane (101) according to claim 13.

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