Classifications

• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
  • E02F9/08—Superstructures; Supports for superstructures
  • E02F9/0841—Articulated frame, i.e. having at least one pivot point between two travelling gear units
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F3/00—Dredgers; Soil-shifting machines
  • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
  • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
  • E02F3/22—Component parts
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
  • E02F9/20—Drives; Control devices
  • E02F9/202—Mechanical transmission, e.g. clutches, gears

Definitions

• the invention relates to a swivel device for excavators or similarly heavy devices, in particular loading belt support with swivel device for bucket wheel excavators, with a toothed ring arranged on a turntable, which is pivotally mounted in the circumferential direction about a vertical axis and can be driven by means of a pinion.
• the slew drive affects both the main slewing ring and the loading belt support.
• the loading belt support is formed here by a toothed ring which can be rotated about a vertical axis and can be driven in the circumferential direction by means of a single pinion engaging radially from the outside.
• a disadvantage of this construction is that when using gears (pinions) as the drive element for the ring gear, only one tooth of the pinion is in engagement with the ring gear, so that there is a relatively high degree of wear.
• gears pinions
• damage to the pinion as a result of tooth breakage can occur in the event of sudden higher torques. This type of drive cannot be used for larger devices.
• DE-AS 11 12462 discloses a device for excavators or similar heavy devices for pivoting a heavy device part relative to a fixed device part supporting this device part. On one part of the device, for. B. on the device superstructure, a series of bolts are arranged concentrically to the pivot center of the pivotable device part.
• the invention is based on the object of developing the swivel device described in the generic part of the first claim so that it can be operated with a high degree of safety with a simple construction effort.
• the drive of the gearwheel is formed by at least two tooth segments which can be engaged and disengaged in the radial direction and are essentially translationally movable in the tangential direction. "" ⁇ ;
• the radially protruding tooth which is arranged approximately at half the circumferential height of the respective toothed segment, serves as an insertion aid, with the tip of the respective toothed segment securely positioning the respective toothed segment relative to the toothed ring if the arrangement is not optimally aligned during the engagement of the toothed segment into the toothed ring poses.
• the indentation of the tooth segment or the subsequent, essentially translatory displacement thereof is preferred accomplished by means of hydraulic cylinders, both of which are spring-loaded. If the respective toothed segment is engaged / disengaged, the infeed movement of the toothed segment in the direction of the toothed ring is realized by a compression spring, the force of which is so great that the toothed ring is locked against the toothed segment in the event of failure of the hydraulic system or systems. A further rotation in the circumferential direction is thus excluded.
• the invention is of course not restricted to this, but there is alternatively the possibility of using common mechanical components such as spindles or the like for moving the tooth segment (s).
• common mechanical components such as spindles or the like for moving the tooth segment (s).
• cam disks or similar articulated drives are also available to enable this movement.
• FIG. 1 side view of the swivel drive according to the invention for the loading belt of a bucket wheel excavator
• FIG. 2 top view of FIG. 1st Fig. 3 - schematic representation of FIG. 2 with a toothed segment in the disengaged state
• Fig. 1 shows a side view of the displacement of an only indicated loading belt support of a bucket wheel excavator, also not shown.
• the loading belt 1 is shown, which rests on a corresponding support 2.
• the loading belt 1 is pivotable about the horizontal pivot axis 3 and rotatable about the vertical axis 4 in the circumferential direction.
• the pivoting movement about the horizontal axis 3 is carried out by means of hydraulic cylinders (not shown further).
• a swivel bearing 5 with sliding bearings is provided, which is formed from the following components:
• the toothed segments 7 are brought into engagement with the respective toothed segments 6 via hydraulic cylinders 8, the hydraulic cylinders 8 being articulated 9 on the one hand with a component 10 which cannot be rotated with the ring gear 6 and articulated 11 on the other hand with the respective toothed segment 7
• Hydraulic cylinder 12 (FIG. 2) is used for the essentially translational movement of the tooth segment (s) 7 in the tangential direction, so that the pivoting movement of the loading belt 1 can be brought about.
• Fig. 2 shows the top view acc. 1 shows the turntable 13 receiving the ring gear 6, a support 14 for receiving the respective toothed segment 7 and the hydraulic cylinders 8 and 12.
• the hydraulic cylinder 8 is articulated 9 on the one hand with the component 10 and articulated on the other hand 11 connected to the respective tooth segment 7.
• the hydraulic cylinder 12 is also articulated 15 on the support 14 and articulated 16 on the respective tooth segment 7.
• the toothed segment 7 shown here is engaged and disengaged by means of the hydraulic cylinder 8 and is moved back and forth essentially translationally by means of the hydraulic cylinder 12, the return movement taking place in the disengaged state of the toothed segment 7.
• Fig. 3 shows a schematic representation of the swivel device 5 again in plan view.
• the toothed ring 13, the turntable 6, the receptacle 14, the toothed segment 7, the hydraulic cylinders 8 and 12 can be seen.
• the toothed segment 7 is designed with flattened teeth 17, several of which, in the engaged state, engage with the corresponding teeth 18 of the ring gear 13 are.
• the toothed segment 7 is provided with an engagement aid in the form of a single tooth 19 projecting radially beyond the flattened teeth 17. If the teeth 17 and 18 are not aligned when the tooth segment 7 is engaged, the engagement aid 19 threads the remaining teeth 17 of the tooth segment 7 by flank contact with the corresponding teeth 18.
• the toothed segment 7 is supported on the surface 20 of the support 14.
• the movement sequence of the swivel device 5 is roughly as follows:
• the engagement aid 19 ensures in this case that the procedure of the intervention can be carried out without problems even with the pivoting movement of the ring gear 13 still going on, since at the same moment a toothed segment (not shown here) is still engaged on the opposite side of the ring gear 13 with the same.

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• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Earth Drilling (AREA)
• Transmission Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6378549

Family Applications (1)

Country Status (8)

Family Cites Families (10)

• 1989
  • 1989-04-13 DE DE3912065A patent/DE3912065C1/de not_active Expired - Lifetime
• 1990
  • 1990-01-16 WO PCT/EP1990/000083 patent/WO1990012161A1/de not_active Application Discontinuation
  • 1990-01-16 EP EP90901782A patent/EP0534946A1/de not_active Withdrawn
  • 1990-01-16 AU AU48484/90A patent/AU620490B2/en not_active Ceased
  • 1990-02-14 ZA ZA901120A patent/ZA901120B/xx unknown
  • 1990-02-22 CA CA002010736A patent/CA2010736A1/en not_active Abandoned
  • 1990-04-11 NZ NZ233287A patent/NZ233287A/xx unknown
  • 1990-11-26 OA OA59904A patent/OA09274A/xx unknown

Non-Patent Citations (1)

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