DE102010006496A1 - Swivel rotator for work machine i.e. hydraulic excavator, has swiveling device including hydraulic cylinder designed as drive unit, where cylinder has cylinder pipe that is hydraulically shiftable on two rods fixed in side walls of housing - Google Patents

Abstract

The rotator has a hydraulically operatable rotator part and a hydraulically operatable swiveling device, which are provided between an upper excavator attachment parts and lower tool attachment parts. The swiveling device has a hydraulic cylinder (1) that is designed as a drive unit. The hydraulic cylinder includes two rods (7) that are fixed in side walls (12) of a swivel rotator housing. The hydraulic cylinder has a cylinder pipe (2) that is hydraulically shiftable on the rods. Synchronization elements (3) e.g. pins, recesses and sliding carriages, are arranged outside of the cylinder pipe.

Description

The invention relates to a Schwenkrotator for work machines, such as hydraulic excavators.

Schwenkrotatoren for hydraulic excavators are also in the EP 0142479 , in the WO 87/02727 , in the WO 93/20292 and in the DE 10115529 described.

The swing rotator for hydraulic excavators is a well-known and useful excavator attachment; it is mounted with upper excavator attachments on a backhoe, articulated handle-diverter unit. The tilting rotator has lower tool attachments on which any excavating tools, such as grave spoons, pallet fork, compactor or rock cutter are mounted. Between the upper excavator attachment parts and the lower tool attachment parts are the two actual main components of the Schwenkrotators, namely a pivoting device with a maximum Verschwenkungsmöglichkeit of 180 °, and a rotator with endless rotation possibility. Attached to hydraulic excavators Schwenkrotatoren offer the excavator driver, except the excavator existing excavator Werkzeugverschwenkung by the stem-diverter unit, two additional, hydraulically actuated excavator tool movements, namely a pivoting and a rotary. For well-gifted excavator operators, these additional dredger tool movement options are helpful work-related simplifications for difficult construction site operations.

Here, tilt rotators are particularly advantageous if they have compact dimensions, and do not need much space.

Disadvantageously, conventional Schwenkrotatoren are not built very compact, since in particular prove the conventional drive means of the pivoting device as disturbing placed components. Usually find as drive means in addition to high-pitched helical motors, wide hydraulic cylinder application.

The object of the invention is to improve the compactness of Schwenkrotatoren by compactly constructed hydraulic cylinders are proposed as a drive means for the pivoting device, which make do with a small space requirement, and are integrated as possible in compact built Schwenkrotatorgehäusen.

The object is solved by the claims.

Accordingly, a Schwenkrotator is proposed in which at least one hydraulic cylinder is used as the drive means for the pivoting device, which has two, fixed to Schwenkrotatorgehäuseteilen rods, and a hydraulically displaceable cylinder tube.

The interior of the cylinder tube delimits two pressure-tight separated Fluidhubräume. The fluid supply to the Zylinderhubräume done either by rod side provided fluid channels, or provided by pipe side fluid lines.

On slidable cylinder tube suitable entrainment elements, such as pins, recesses, gears, side walls or sliding mounted, which are either toothed directly with driving elements of the pivoting part lever in a force-transmitting manner, or which indirectly, by means of movable spacers such as sliding block, coupling rod, rope or chain in force-transmitting manner.

Advantageously, the proposed double-acting hydraulic cylinder even with compact dimensions offers large strokes, as well as the driving elements, which are located on the outside of the cylinder tube, do not require additional hydraulic cylinder length. Based on this, it is proposed that at least one hydraulic cylinder is integrated integrated in the Schwenkrotatorgehäuse.

It is provided that the hydraulic cylinder, at least in the zero position of the pivoting device has a largely installed position. In this case, the two outer rod ends of the hydraulic cylinder are fixed on opposite sides of the Schwenkrotators. The rods may also be tubular. The hydraulic cylinder can be installed on the lower or upper pivoting part. The hydraulic cylinder is best located in the lower pivoting part, namely on the front or rear side of the rotator. This mounting position allows a flat Schwenkrotatorbauweise, as rotator and hydraulic cylinder at the same height level, use a common construction height.

The invention will be described in more detail with reference to FIGS.

The 1 shows, on average,
a very compact hydraulic cylinder ( 1 ), which on two opposite side walls ( 12 ) of a Schwenkrotatorgehäuses ( 16 ) with its two rods ( 7 ). A pressure medium filling of the first fluid space ( 10 ) or the second fluid space ( 11 ) causes a linear movement (ZRB) of the cylinder tube ( 2 ). This cylinder tube movement is used as a working stroke, while the Outer of the cylinder tube ( 2 ) Entrainment elements ( 3 ), here in the form of a guide carriage ( 4 ) with two internal sliding surfaces ( 37 ), wherein a not shown sliding block ( 29 ) can walk up and down.

The fluid spaces ( 10 ) and ( 11 ) are by a rod-side partition ( 14 ) separated from each other. Pipe-side fluid lines ( 9 ) allow pressurizing the fluid spaces. The fluid spaces are sealed by means of sealing and guiding elements ( 13 ) pressure tight.

The 2 also shows a compact hydraulic cylinder ( 1 ) in section, wherein the displaceable cylinder tube ( 2 ) Entrainment elements ( 3 ) in the form of cones ( 5 ) are arranged, which not shown coupling rods ( 30 ) as a force-transmitting movable intermediate pieces ( 28 ) be able to record.

The cylinder tube ( 2 ) has an inner partition ( 14 ) for separating the fluid spaces ( 10 ) and ( 11 ). The partition here contains two pressure relief valves ( 15 ), which in each case open at an impermissible pressure exceeding a fluid chamber, on the other fluid space. The cylinder tube ( 2 ) experiences an advantageous, yielding displacement, and is protected against overpressure damage.

Two spaced bars ( 7 ) are located on the two opposite side walls ( 12 ) of the Schwenkrotatorgehäuses, and include respective fluid channels ( 8th ) with which the two fluid spaces ( 10 ) and ( 11 ) can be supplied with pressure medium. Sealing and guiding elements ( 13 ) seal the fluid spaces pressure-tight.

The 3 to 5 show possible intermediate pieces ( 28 ) which are movable so that they the working force of the linear cylinder displacement (ZRB) on a part-circular pivotal movement (SB) of the pivoting part lever ( 26 ) can transmit.

The 3 shows a sliding block ( 29 ), with a bearing bore ( 38 ) and two sliding surfaces ( 37 ). The sliding surfaces of the sliding block correspond slidably with the sliding surfaces of a guide carriage ( 4 ) on the cylinder tube ( 2 ) while the bearing bore ( 38 ) a pin-shaped driving element on the pivoting part lever ( 26 ) is associated articulated.

The 4 shows a coupling rod ( 30 ), with two spaced bearing bores ( 38 ). This coupling rod requires in each case a journal bearing on the cylinder tube ( 2 ) and on the swivel part lever ( 26 ), as a force-transmitting movable intermediate piece ( 28 ) to act between linear cylinder tube movement, and part-circular Schwenkteilhebelbewegung.

The 5 shows a rope ( 31 ) which also serves as a movable force-transmitting intermediate piece ( 28 ) can serve. Here are on the cylinder tube ( 2 ) and on the swivel part lever ( 26 ) correspondingly suitable guiding and fastening means ( 40 ) intended.

The 6 shows, on average, how a common carrier element ( 3 ) of two hydraulic cylinders ( 1 ) with a swivel part lever ( 26 ) is directly connected in a force-transmitting manner, in that bilateral toothings ( 6 ) intermesh. Since the upper pivoting part ( 23 ) with its excavator attachments ( 18 ) is fixed to the handle-diverter unit of the hydraulic excavator, pivots in a hydraulically actuated displacement of the cylinder tubes ( 2 ) the not shown lower pivot part together with the included drive means ( 1 ) and the entrainment elements ( 3 ), in the pivot axis ( 22 ).

The 7 shows, in side view, a Schwenkrotator invention ( 16 ) with its upper excavator attachments ( 18 ) of the stalk-diverter unit ( 32 ) is assigned to a hydraulic excavator.

An excavator tool ( 25 ), in the form of a grave spoon is shown below it, it is intended for attachment to the Schwenkrotator. The attachment is made by lower tool attachment parts ( 19 ), here by a practical quick-change device ( 34 ), with manually or hydraulically actuated locking bolt ( 39 ).

It can clearly be seen that hydraulic excavators can do without the use of tilt rotators when the excavator tool ( 25 ) directly to the handle-diverter unit ( 32 ) is grown. However, the hydraulic excavator then has only one Verschwenkungsmöglichkeit the excavator tool ( 25 ) in the stem pivot axis ( 33 ), whereby a part-circular spoon movement (LB) is given.

The use of a swivel rotator, however, allows two more excavator tool movements, namely a rotative (RB) in the Rotatotdrehachse ( 35 ) and a pivoting (SB) in the pivot axis ( 22 ).

So is in the range of the lower pivoting part ( 24 ) a rotator ( 20 ), which by means of a rotator drive ( 27 ) a turntable ( 36 ) can move endlessly (RB). On the turntable suitable tool attachments ( 19 ) attached which various excavator tools ( 25 ) be able to record.

The pivoting movement (SB) takes place in the pivot axis ( 22 ), here are two hydraulic cylinders ( 1 ) provided as a drive means. The hydraulic cylinders ( 1 ) are in Schwenkrotatorgehäuse ( 16 ), with their rods ( 7 ) on the Schwenkrotatorseitenwänden ( 12 ) of the lower pivoting part ( 24 ). An entrainment element ( 3 ), here a plate with tooth-shaped recesses ( 6 ) is the two cylinder tubes ( 2 ) and transmits the linear stroke of the cylinder tube movement (ZRB) on the part-circular toothed pivoting part lever ( 26 ) of the upper pivoting part ( 23 ). The pivoting takes place in the pivot axis ( 22 ) instead of.

For all hydraulically operating components of the Schwenkrotators suitable, not shown hydraulic lines are provided which ensure necessary fluid supplies even with sufficient pressure. Additionally required hydraulic lines for hydraulically operated excavator tools ( 25 ), as for rock cutters, are not shown but provided; The hydraulic lines can be performed by means of rotary unions through the rotator.

Between upper ( 23 ) and lower pivoting part ( 24 ) is enough space to accommodate not shown, necessary electrical or hydraulic components.

Hydraulic cylinder ( 1 ) and rotator ( 20 ) are at the same height level, and advantageously require only a common construction height.

The 8th shows, partially in section, the rear or front view of a Schwenkrotators invention ( 16 ), wherein between the cylinder tube ( 2 ) and the swivel part lever ( 26 ) a force-transmitting, movable intermediate piece ( 28 ) in the form of a coupling rod ( 30 ) is installed. The coupling rod ( 30 ) on the one hand, the linear cylinder tube movement (ZRB), and on the other hand perform the part-circular pivoting part movement (SB) force transmitting, by respective peg-shaped driving elements ( 3 . 5 ) on the cylinder tube ( 2 ) and on the swivel part lever ( 26 ) the bearing bores ( 38 ) absorb the coupling rod articulated.

The compact hydraulic cylinder ( 1 ) is between side walls ( 12 ) lying, and thus integrated protected in the Schwenkrotatorgehäuse. At the same height level where the illustrated hydraulic cylinder ( 1 ) is also the unillustrated rotator ( 20 ) with rotator drive ( 27 ).

The lower tool attachments ( 19 ) are used as a quick-change device ( 34 ) educated; the two locking bolts ( 39 ) can be operated manually or hydraulically.

The 9 shows one between the side walls ( 12 ) of the Schwenkrotatorgehäuses ( 16 ), very compact hydraulic cylinders ( 1 ), wherein the entrainment element ( 3 ) as a guide carriage ( 4 ) with inner sliding surfaces ( 37 ) is designed. The guide carriage ( 4 ) contains a sliding block ( 29 ) which by means of matching sliding surfaces ( 37 ) is movable in the guide carriage. The sliding block has a bearing bore ( 38 ) which an intended pin-shaped driving element ( 3 . 5 ) on the pivoting part lever ( 26 ) is associated articulated.

The rods ( 7 ) of the hydraulic cylinder ( 1 ) are by means of any fastening means ( 40 ), such as a welded joint, in the side walls ( 12 ).

LIST OF REFERENCE NUMBERS

1

Drive means, hydraulic cylinders in a compact design

2

cylinder tube

3

driving element

4

guide carriage

5

Cones, holes

6

Teeth, rack, plate with recesses

7

Pole, fixed, also tubular

8th

Rod-side fluid channels

9

Pipe side fluid lines

10

First fluid space

11

Second fluid space

12

Side, side walls of the Schwenkrotatorgehäuses

13

Sealing and guiding elements, also scrapers

14

partition wall

15

Overpressure relief valve

16

Tilting rotator, tilting rotator housing

17

hydraulic excavators

18

Upper excavator attachments

19

Lower tool attachments

20

rotator

21

Pivot means

22

swivel axis

23

Upper swivel part

24

Lower swivel part

25

Excavator tool, such as grave bucket, compactor, rock cutter

26

Pivoting part lever

27

Rotatorantrieb

28

Power transmitting movable spacer

29

slide

30

coupling rod

31

Rope, chain

32

Stem-diverter unit of the hydraulic excavator

33

Swivel axis in the excavator handle

34

Quick change device

35

Rotatordrehachse

36

turntable

37

sliding surfaces

38

bearing bores

39

locking bolt

40

fastener

ZRB

linear cylinder tube movement

SB

part-circular pivoting movement

RB

rotating movement

LB

part-circular spoon movement

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0142479 [0002]
• WO 87/02727 [0002]
• WO 93/20292 [0002]
• DE 10115529 [0002]

Claims (10)

Tilting Rotator ( 16 ) for working machines, such as hydraulic excavators, whereby between upper excavator attachments ( 18 ) and lower tool attachments ( 19 ), a hydraulically actuated rotator ( 20 ) and a hydraulically actuated pivoting device ( 21 ) is located. The pivoting device ( 21 ) has as drive means at least one compact hydraulic cylinder ( 1 ), which is characteristically two, in pages ( 12 ) of the Schwenkrotatorgehäuses ( 16 ) fixed rods ( 7 ), and a hydraulically displaceable cylinder tube ( 2 ), having. Tilting Rotator ( 1 ) according to claim 1, characterized in that hydraulic cylinders ( 1 ) by means of two fluid spaces ( 10 and 11 ) have a double-acting function, and that on the outside of the cylinder tubes ( 2 ) Entrainment elements ( 3 ) are arranged. Tilting Rotator ( 16 ) according to claim 1 and 2, characterized in that hydraulic cylinders ( 1 ), at least in the zero position of the pivoting device ( 21 ), lying in Schwenkrotatorgehäuse ( 16 ) are installed. Tilting Rotator ( 16 ) according to claims 1 to 3, characterized in that hydraulic cylinders ( 1 ) in the lower pivoting part ( 24 ) are arranged, and largely at the height level of the rotator ( 20 ) are located. Tilting Rotator ( 16 ) according to claim 1 to 4, characterized in that the entrainment elements ( 3 ) of the hydraulic cylinders ( 1 ) in force-transmitting manner, directly by means of toothings ( 6 ) with swivel part lever ( 26 ) keep in touch. Tilting Rotator ( 16 ) according to claim 1 to 4, characterized in that between entrainment elements ( 3 ) of hydraulic cylinders ( 1 ) and entrainment elements ( 3 ) of pivoting part lever ( 26 ), correspondingly suitable force-transmitting, movable intermediate pieces ( 28 ) are located. Tilting Rotator ( 16 ) according to claim 1 to 4 and 6, characterized in that force-transmitting, movable intermediate pieces ( 28 ) as sliding blocks ( 29 ) are formed. Tilting Rotator ( 16 ) according to claim 1 to 4 and 6, characterized in that force-transmitting, movable intermediate pieces ( 28 ) as coupling rods ( 30 ) are formed. Tilting Rotator ( 16 ) according to claim 1 to 4 and 6, characterized in that force-transmitting, movable intermediate pieces ( 28 ) as ropes or chains ( 31 ) are formed. Tilting Rotator ( 16 ) according to claims 1 to 9, characterized in that the fluid spaces ( 10 and 11 ) of the hydraulic cylinders ( 1 ) by rod-side fluid channels ( 8th ) are supplied with fluid.

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