CA2010736A1 - Pivoting device for excavators or similar heavy equipment - Google Patents
Pivoting device for excavators or similar heavy equipmentInfo
- Publication number
- CA2010736A1 CA2010736A1 CA002010736A CA2010736A CA2010736A1 CA 2010736 A1 CA2010736 A1 CA 2010736A1 CA 002010736 A CA002010736 A CA 002010736A CA 2010736 A CA2010736 A CA 2010736A CA 2010736 A1 CA2010736 A1 CA 2010736A1
- Authority
- CA
- Canada
- Prior art keywords
- ring gear
- pivoting device
- engagement
- toothed segment
- relevant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000033001 locomotion Effects 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract 1
- 241000282472 Canis lupus familiaris Species 0.000 description 2
- 230000002844 continuous effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
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
Landscapes
- 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)
Abstract
ABSTRACT
The invention relates to a pivoting device for excavators or similar heavy equipment, and in particular, to a loading conveyor support with a pivoting device for a bucket-wheel excavator. The pivoting movement is effected by means of a ring gear and a drive, the drive being in the form of at least two toothed segments, preferably facing each other, which are adapted to be engaged and disengaged radially and to execute translatory movements in the tangential direction. The engaging and disengaging procedures and the translatory movements are effected by means of hydraulic cylinders.
The invention relates to a pivoting device for excavators or similar heavy equipment, and in particular, to a loading conveyor support with a pivoting device for a bucket-wheel excavator. The pivoting movement is effected by means of a ring gear and a drive, the drive being in the form of at least two toothed segments, preferably facing each other, which are adapted to be engaged and disengaged radially and to execute translatory movements in the tangential direction. The engaging and disengaging procedures and the translatory movements are effected by means of hydraulic cylinders.
Description
2Q~73i~'i ~ he invention relates to a pivoting device for excavators or similar heavy equipment, and in particular, to a loading conveyor support with pivoting device for bucket-wheel excavators, having a ring gear arranged upon a turntable which i8 mounted to pivot in a peripheral direction about a vertical axi~ and i~ adapted to be driven by mean~ of a pinion.
A drive for pivoting excavator~ i6 known from German Patent 885 679. The drive relate6 to both the main slewing ring and to the conveyor loading support.
The latter i6 in the form of a ring gear adapted to rotate about a vertical axi6 and adapted to be driven peripherally by a ~ingle pinion engaging therewith from the outside.
One difiadvantage of thi6 design i~ that when gear6 (pinion) are used to drive the ring gear, only one tooth of the plnion is in engagement with the ring gear and that thi6 loade to a relatively con6iderable amount of wear. In addition, a high-impact torque may damage the pinion by breaking a tooth. This type of drive 1B, therefore, not ~ultable for hea~y equipment.
German AS 11 12 462 disclo~e~ a device for pivoting part of a piece of heavy equipment in relation to a stationary part which support~ the pivotable part. One part of the piece of equipment, for example the ~uperstructure, carrie6 a ~eries of pins arranged concentrically with the centre about which the other part pivote. Several dogs are connected sd/jc -1~
A drive for pivoting excavator~ i6 known from German Patent 885 679. The drive relate6 to both the main slewing ring and to the conveyor loading support.
The latter i6 in the form of a ring gear adapted to rotate about a vertical axi6 and adapted to be driven peripherally by a ~ingle pinion engaging therewith from the outside.
One difiadvantage of thi6 design i~ that when gear6 (pinion) are used to drive the ring gear, only one tooth of the plnion is in engagement with the ring gear and that thi6 loade to a relatively con6iderable amount of wear. In addition, a high-impact torque may damage the pinion by breaking a tooth. This type of drive 1B, therefore, not ~ultable for hea~y equipment.
German AS 11 12 462 disclo~e~ a device for pivoting part of a piece of heavy equipment in relation to a stationary part which support~ the pivotable part. One part of the piece of equipment, for example the ~uperstructure, carrie6 a ~eries of pins arranged concentrically with the centre about which the other part pivote. Several dogs are connected sd/jc -1~
2~ 073~
by gearing to a ~tationary point on the fir~t part of the piece of equipment in 6uch a nlanner that, by actuating the gearing, they can be moved in relation to the stationary point and the pin6, 80 that one dog engages one of the pin~ and cau6es it to move in relation to the ~tationary point or cauRes the stationary point to move in relation to the pin along a circular path defined by the movement of the pivotable part. The pivotable part i~, therefore, pivoted mechanically in relation to the stationary part.
1~ Thus, alternating or Rimultaneous actuation of the dog6 provide~ continuou~ or intermittent pivoting of the pivotable part of the piece of equipment. The disadvantage of this prior art is mainly the complex hydro-mechanical control Continuous operation would also appear to ral~e problem~
~ince the pivotable part mu~t ~top to allow a pin to be engaged, ~o that further plvoting through a predetermined angle may be carried out.
Based upon German Patent 885 679, it is the purpo~e of the lnventlon to develop a pivoting device for oxcavator~ or ~imilar heavy equipment, and in particular, to a loading conveyor support w th a pivoting device for a bucket-wheel excavator, which ie simple in de~ign and ha~ the highest possible degree of reliability.
Accordingly there is provided a pivoting device of the type described above having a ring gear arranged upon a turntable which is mounted to pivot ln a peripheral sdtjc -2-. . .
2~736 direction about a vertical axis and is adapted to be driven by mean~ of a pinion. The drive for the ring gear is in the form of at least two toothed segments which are adapted to be engaged and disengaged radially and to carry out a sub~tantially translatory movement in the tangential direction.
Further advantageous developments of the object according to the invention may be gathered from the ~ub-claims.
The use of rack-like segment~, equipped with a plurality of teeth, en~ures that when the ring gear 18 operated, not just one tooth, as in the ca6e of a plnion, but several teeth, are in engagement. Thls reduces to a minimum the danger of teeth being damaged by high torque load8 and, at the same time, the load carrying capacity i~ subetantially increased in comparieon with a pinion.
A tooth pro~ecting radially by about half the -~
poripheral hèight of the rolevant toothed segment serves, : ln thi8 ca80, a8 an engagement àid slnce, in the absence of optlmal alignmont during engagement of the 8egment wlth the ring gear, the ap0x of the relevant segment positions it in relation to the ring gear.
; :
~ The engagement of the toothed ~egment, and the ~ ~ 8u ~ ence eubetantially translatory dieplacement thereof, ie preferably effected by meane of hydraulic cylinders actuated by ~prings. In the case of ongagement/ti~engagement of the r¢levant toothed segment, the feed motion of the ' ' , ~ sdll~ 3 : . . . : ~ - . :
. ~: .;, .
: :.
.
, ~
7~
~egment toward~ the ring gear iB effected by a compre~sion ~ipring. The force of this 6pring i6 6uch that, in the event of failure of the hydraulic syfitem or ~y6tems, the ring gear is locked in relation to the toothed ~iegment, thus preventing any further rotation in the peripheral direction. The arrangement of a plurality of toothed segmenti~ around the periphery o~ the ring gear increases reliability ~till further on the one hand and allows pivoting in both directions on the other hand. In order to provide for continuou~ pivoting of the ring gear, the toothed segment or ~egment~ not yet in engagement ~ith the ring gear may be brought into engagement therewith before the substantially translatory movement of the eegment or ~egment~
i8 completed. This pre~ents no problem~ 6ince, on the one hand, the plvoting motion i6 ufiually carried out relatively slowly and, on the other hand, an engagement aid in the form of pro~ectlng tooth i6 provided allowing damage-free engagement of the 6egment or 6egment~.
Although the preferred form of operation i6 with hydraulic cylinders, the invention le, of cour~e, not restrictod thereto, It i~ al60 po~ible to u~e conventional mechanical component~, 6uch as ~pindles or the like, in order to move the toothed ~egment or fiegment~. Cam~ or tho like may also be used to produce this motion.
The invention i~ described herelnbelow in conjunction with the example of embodiment illustrated in the drawing sd/~ _4 .. . .
.. . - .- ~ ~
: :
attached hereto, wherein:
Fig. 1 is a ~ide elevation of the pivoting drive according to the invention for the loading conveyor of a bucket-wheel excavator;
Fig. 2 is a plan view according to Fig. l;
Fig. 3 i8 a diagrammatical representatioD of Fig. 2 with a toothed segment in the disengaged condition.
- Fig. 1 shows, in side elevation, the movement of a loading conveyor support for a bucket-wheel excavator, not shown. Loading conveyor 1 rests upon an appropriate support 2. The loading conveyor i8 adapted to pivot about a horizontal axifi 3 and to rotate in the peripheral direction about a vertical axis 4. The pivoting motlon about horizontal axls 3 is effected by means of hydraulic cylinders, not shown. The peripheral pivoting motion about vertical axi~ 4 ufies a plaln pivot bearing 5 consisting of the following componentss a ring gear 13 and toothed segment~ 7 facing each other at the outer periphery of the ring gear 13 and adapted to be brought into en8agement therewith (only one ~ide ~hown). Toothed ~egments 7 are brought into engagement with relevant ring gear 13 by means of hydraulic cylinders 3, the cylinders being hingod at 9 to a component 10 which i~ not adapted to rotate with ring gear 13 and being hinged at 11 to the relevant toothed segment 7.
An additional hydraulic cylinder 12, not shown, cau~e~
.. ; ~
sdl~ -5-:': . . . ' ' ' ' ' -. . ' ' ~ , . . .
æ~07~6 toothed segment or ~egments 7 to carry out a ~ub~tantially tran61atory movement in the tangential direction, in order to allo~ loading conveyor 1 to be pivoted.
Fig. 2 i~ a plan view according to Fig. 1.
Shown here are: a turntable 6 accommodating rin8 gear 13, a ~upport 14 for relevant toothed ~e8ment 7, and hydraulic cylinder~ 8 and 12. As already indicated, hydraulic cylinder 8 i8 hinged at 9 to component 10 and i~ hinged at ll to relevant toothed ~egment 7. Hydraulic cylinder 12 is also hinged at 15 to support 14 and i~ hinged at 16 to relevant toothed segment 7. The segment 7 i8 engaged and di~engaged by means of hydraulic cylinder 8 and is moved back and forth by hydraulic cylinder 12, the return being effected with the toothed segment in the disengaged condition.
Fig, 3 i~ a diagrammatical repreflontation of L
pi~oting device 5, showing ring gear 13, turntable 16, ~upport 14, toothed segment 7, and hydraulic cylinders 8 and 12, The ~egment 7 comprlses flattened teeth 17, several of which engage with corresponding teeth 18 of ring gear 13 in the engaged condition. Segment 7 i~ equipped with an engagement aid in the form of a single tooth 19 pro~ecting radially beyond flattened teeth 17, If, during the engagement of ~egment 7, teeth 17and 18 are not in alignment, engagement aid 19 ensures the engagement of the teeth 17 and 18 by mating with a pair of corre~ponding sd/\;r -6-. ~ ,, : ' .
20~0736 teeth 18. At this time, segment 7 rests upon surface 20 of support 14.
The movement pattern of pivoting device 5 is approximately as follows:
if ring gear 13 is to be pivoted in the peripheral direction, piston 21 of cylinder 8 is extended by the force of a compression spring 22 and the toothed segment 7, and teeth 17 thereof, are brought into engagement with teeth 18 of ring gear 13. In this case, engagement aid 19 ensures that this engagement can be carried out without any difficulty, even if ring gear 13 is still pivoting since, at the same moment, a toothed segment, not shown, on the opposite side of ring gear 13, is still in engagement therewith. Hydraulic exteneion of piston rod 23 of cylinder 12 cau~es toothed segment 7 to carry out a substantially translatory movement tangentially to ring gear 13. As ~oon as the engagement of the toothed segment 7 is approaching completion, the toothed segment on the opposite side, engages with the ring gear 13, thus ensuring smooth, continuous pivoting in the peripheral direction. Intermittent pivoting 1~, of course, possible if required. Upon completion of the translatory movement of toothed segment 7, pi6ton 21 of cylinder 8 retracts again~t the force of spring 22 and disengage~ segment 7 from teeth 18 of ring gear 13. The force of tension spring 24 returns piston 23, ; and thus toothed segment 7, to their starting positions.
,~ , ~ sd/~ ~7~
': . ' . ' ' , ' ' ' :
,~
, : , :': - - . .
. . , ' :.. ' ' - ' . ' ' . ' ' :
by gearing to a ~tationary point on the fir~t part of the piece of equipment in 6uch a nlanner that, by actuating the gearing, they can be moved in relation to the stationary point and the pin6, 80 that one dog engages one of the pin~ and cau6es it to move in relation to the ~tationary point or cauRes the stationary point to move in relation to the pin along a circular path defined by the movement of the pivotable part. The pivotable part i~, therefore, pivoted mechanically in relation to the stationary part.
1~ Thus, alternating or Rimultaneous actuation of the dog6 provide~ continuou~ or intermittent pivoting of the pivotable part of the piece of equipment. The disadvantage of this prior art is mainly the complex hydro-mechanical control Continuous operation would also appear to ral~e problem~
~ince the pivotable part mu~t ~top to allow a pin to be engaged, ~o that further plvoting through a predetermined angle may be carried out.
Based upon German Patent 885 679, it is the purpo~e of the lnventlon to develop a pivoting device for oxcavator~ or ~imilar heavy equipment, and in particular, to a loading conveyor support w th a pivoting device for a bucket-wheel excavator, which ie simple in de~ign and ha~ the highest possible degree of reliability.
Accordingly there is provided a pivoting device of the type described above having a ring gear arranged upon a turntable which is mounted to pivot ln a peripheral sdtjc -2-. . .
2~736 direction about a vertical axis and is adapted to be driven by mean~ of a pinion. The drive for the ring gear is in the form of at least two toothed segments which are adapted to be engaged and disengaged radially and to carry out a sub~tantially translatory movement in the tangential direction.
Further advantageous developments of the object according to the invention may be gathered from the ~ub-claims.
The use of rack-like segment~, equipped with a plurality of teeth, en~ures that when the ring gear 18 operated, not just one tooth, as in the ca6e of a plnion, but several teeth, are in engagement. Thls reduces to a minimum the danger of teeth being damaged by high torque load8 and, at the same time, the load carrying capacity i~ subetantially increased in comparieon with a pinion.
A tooth pro~ecting radially by about half the -~
poripheral hèight of the rolevant toothed segment serves, : ln thi8 ca80, a8 an engagement àid slnce, in the absence of optlmal alignmont during engagement of the 8egment wlth the ring gear, the ap0x of the relevant segment positions it in relation to the ring gear.
; :
~ The engagement of the toothed ~egment, and the ~ ~ 8u ~ ence eubetantially translatory dieplacement thereof, ie preferably effected by meane of hydraulic cylinders actuated by ~prings. In the case of ongagement/ti~engagement of the r¢levant toothed segment, the feed motion of the ' ' , ~ sdll~ 3 : . . . : ~ - . :
. ~: .;, .
: :.
.
, ~
7~
~egment toward~ the ring gear iB effected by a compre~sion ~ipring. The force of this 6pring i6 6uch that, in the event of failure of the hydraulic syfitem or ~y6tems, the ring gear is locked in relation to the toothed ~iegment, thus preventing any further rotation in the peripheral direction. The arrangement of a plurality of toothed segmenti~ around the periphery o~ the ring gear increases reliability ~till further on the one hand and allows pivoting in both directions on the other hand. In order to provide for continuou~ pivoting of the ring gear, the toothed segment or ~egment~ not yet in engagement ~ith the ring gear may be brought into engagement therewith before the substantially translatory movement of the eegment or ~egment~
i8 completed. This pre~ents no problem~ 6ince, on the one hand, the plvoting motion i6 ufiually carried out relatively slowly and, on the other hand, an engagement aid in the form of pro~ectlng tooth i6 provided allowing damage-free engagement of the 6egment or 6egment~.
Although the preferred form of operation i6 with hydraulic cylinders, the invention le, of cour~e, not restrictod thereto, It i~ al60 po~ible to u~e conventional mechanical component~, 6uch as ~pindles or the like, in order to move the toothed ~egment or fiegment~. Cam~ or tho like may also be used to produce this motion.
The invention i~ described herelnbelow in conjunction with the example of embodiment illustrated in the drawing sd/~ _4 .. . .
.. . - .- ~ ~
: :
attached hereto, wherein:
Fig. 1 is a ~ide elevation of the pivoting drive according to the invention for the loading conveyor of a bucket-wheel excavator;
Fig. 2 is a plan view according to Fig. l;
Fig. 3 i8 a diagrammatical representatioD of Fig. 2 with a toothed segment in the disengaged condition.
- Fig. 1 shows, in side elevation, the movement of a loading conveyor support for a bucket-wheel excavator, not shown. Loading conveyor 1 rests upon an appropriate support 2. The loading conveyor i8 adapted to pivot about a horizontal axifi 3 and to rotate in the peripheral direction about a vertical axis 4. The pivoting motlon about horizontal axls 3 is effected by means of hydraulic cylinders, not shown. The peripheral pivoting motion about vertical axi~ 4 ufies a plaln pivot bearing 5 consisting of the following componentss a ring gear 13 and toothed segment~ 7 facing each other at the outer periphery of the ring gear 13 and adapted to be brought into en8agement therewith (only one ~ide ~hown). Toothed ~egments 7 are brought into engagement with relevant ring gear 13 by means of hydraulic cylinders 3, the cylinders being hingod at 9 to a component 10 which i~ not adapted to rotate with ring gear 13 and being hinged at 11 to the relevant toothed segment 7.
An additional hydraulic cylinder 12, not shown, cau~e~
.. ; ~
sdl~ -5-:': . . . ' ' ' ' ' -. . ' ' ~ , . . .
æ~07~6 toothed segment or ~egments 7 to carry out a ~ub~tantially tran61atory movement in the tangential direction, in order to allo~ loading conveyor 1 to be pivoted.
Fig. 2 i~ a plan view according to Fig. 1.
Shown here are: a turntable 6 accommodating rin8 gear 13, a ~upport 14 for relevant toothed ~e8ment 7, and hydraulic cylinder~ 8 and 12. As already indicated, hydraulic cylinder 8 i8 hinged at 9 to component 10 and i~ hinged at ll to relevant toothed ~egment 7. Hydraulic cylinder 12 is also hinged at 15 to support 14 and i~ hinged at 16 to relevant toothed segment 7. The segment 7 i8 engaged and di~engaged by means of hydraulic cylinder 8 and is moved back and forth by hydraulic cylinder 12, the return being effected with the toothed segment in the disengaged condition.
Fig, 3 i~ a diagrammatical repreflontation of L
pi~oting device 5, showing ring gear 13, turntable 16, ~upport 14, toothed segment 7, and hydraulic cylinders 8 and 12, The ~egment 7 comprlses flattened teeth 17, several of which engage with corresponding teeth 18 of ring gear 13 in the engaged condition. Segment 7 i~ equipped with an engagement aid in the form of a single tooth 19 pro~ecting radially beyond flattened teeth 17, If, during the engagement of ~egment 7, teeth 17and 18 are not in alignment, engagement aid 19 ensures the engagement of the teeth 17 and 18 by mating with a pair of corre~ponding sd/\;r -6-. ~ ,, : ' .
20~0736 teeth 18. At this time, segment 7 rests upon surface 20 of support 14.
The movement pattern of pivoting device 5 is approximately as follows:
if ring gear 13 is to be pivoted in the peripheral direction, piston 21 of cylinder 8 is extended by the force of a compression spring 22 and the toothed segment 7, and teeth 17 thereof, are brought into engagement with teeth 18 of ring gear 13. In this case, engagement aid 19 ensures that this engagement can be carried out without any difficulty, even if ring gear 13 is still pivoting since, at the same moment, a toothed segment, not shown, on the opposite side of ring gear 13, is still in engagement therewith. Hydraulic exteneion of piston rod 23 of cylinder 12 cau~es toothed segment 7 to carry out a substantially translatory movement tangentially to ring gear 13. As ~oon as the engagement of the toothed segment 7 is approaching completion, the toothed segment on the opposite side, engages with the ring gear 13, thus ensuring smooth, continuous pivoting in the peripheral direction. Intermittent pivoting 1~, of course, possible if required. Upon completion of the translatory movement of toothed segment 7, pi6ton 21 of cylinder 8 retracts again~t the force of spring 22 and disengage~ segment 7 from teeth 18 of ring gear 13. The force of tension spring 24 returns piston 23, ; and thus toothed segment 7, to their starting positions.
,~ , ~ sd/~ ~7~
': . ' . ' ' , ' ' ' :
,~
, : , :': - - . .
. . , ' :.. ' ' - ' . ' ' . ' ' :
Claims (13)
1. A pivoting device for excavators or similar heavy equipment, and more particularly a loading conveyor support with a pivoting device for a bucket-wheel excavator, having a ring gear arranged upon a turntable which is mounted to pivot in a peripheral direction about a vertical axis and is adapted to be driven by means of a pinion, characterized in that the drive for the ring gear is in the form of at least two toothed segments (7) designed to be engaged and disengaged in the radial direction and to carry out substantially translatory movements in the tangential direction.
2. A pivoting device according to claim 1, characterized in that, two toothed segments (7) arranged to face each other at the periphery of the ring gear are used for the purpose of causing said ring gear to be pivoted, at least one toothed segment (7) being in engagement with said ring gear at any one time.
3. A pivoting device according to claim 1, characterized in that if more than two toothed segments (7) are used, they are distributed uniformly around the periphery of the ring gear (13), and at least one toothed segment (7) being in engagement with said ring gear at any one time in order to produce the pivoting motion.
4. A pivoting device according to one of claims 1 to 3, characterized in that each toothed segment (7) is designed with flattened teeth (17) and is provided with an engagement aid in the form of a single, substantially complete tooth (19) projecting radially beyond said flattened teeth.
5. A pivoting device according to one of claims 1 to 3, characterized in that the engagement aid (19) is arranged at about half the peripheral height of the relevant toothed segment (7).
6. A pivoting device according to one of claims 1 to 5, characterized in that the device for engaging and disengaging the relevant toothed segment, or segments, (7) comprises at least one hydraulic cylinder (8) adapted to be acted upon by the force of a spring, said cylinder being hinged (9), on the one hand, to a component (10) which is stationary in relation to the ring gear (13), and being hinged (11), on the other hand, to the relevant toothed segment (7).
7. A pivoting device according to claim 6, characterized in that disengagement of the relevant toothed segment (7) is effected hydraulically and the engagement thereof is effected by the force of at least one compression spring (22).
8. A pivoting device according to claim 6 or 7, characterized in that the selected spring force is such that, in the event of failure of the hydraulic system or systems (8,12), it leads to locking of the ring gear (13) in that the toothed segment or segments (7), not yet in engagement, are caused to engage with the ring gear (13).
9. A pivoting device according to one of claims 1 to 8, characterized in that the substantially translatory tangential movement component of the relevant toothed segment (7) is brought about by at least one hydraulic cylinder (12) adapted to be acted upon by the force of a spring, said cylinder being hinged (15), on the one hand, to a component (14) which is stationary in relation to the ring gear (13), and is hinged (16), on the other hand, to the relevant toothed segment (7).
10. A pivoting device according to claim 9, characterized in that the pivoting motion of the ring gear (13) is effected hydraulically while the return of the hydraulic cylinder (12) to its starting position, after disengagement of the relevant toothed segment (7), is effected by the force of at least one tension spring (24).
11. A pivoting device according to one of claims 1 to 10, characterized in that the hinge point (11) of the relevant hydraulic cylinder (8), for engagement and disengagement, is arranged approximately facing said engagement aid (19), while the hinge point (16) of the relevant hydraulic cylinder (12), for the substantially translatory tangential movement, is arranged substantially on the face of the relevant toothed segment (7).
12. A pivoting device according to one of claims 1 to 11, characterized in that in order to produce a continuous pivoting motion of the ring gear (13), the toothed segment or segments (7), not yet in engagement with the ring gear (13), are brought into engagement therewith when the substantially translatory movement of the toothed segment or segments (7), already in engagement, is not yet completely finished.
13. A pivoting device according to one of claims 1 to 12, characterized in that in order to produce a pivoting motion of the ring gear (13) in both peripheral directions, two pairs of toothed segments (7), arranged facing each other, are provided with hydraulic cylinders (8,12), the hinge points (15,16) of hydraulic cylinders (12), for the substantially tangential movement of the relevant toothed segments (7), being arranged in pairs on opposite faces of the toothed segments (7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3912065.1 | 1989-04-13 | ||
| DE3912065A DE3912065C1 (en) | 1989-04-13 | 1989-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2010736A1 true CA2010736A1 (en) | 1990-10-13 |
Family
ID=6378549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002010736A Abandoned CA2010736A1 (en) | 1989-04-13 | 1990-02-22 | Pivoting device for excavators or similar heavy equipment |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0534946A1 (en) |
| AU (1) | AU620490B2 (en) |
| CA (1) | CA2010736A1 (en) |
| DE (1) | DE3912065C1 (en) |
| NZ (1) | NZ233287A (en) |
| OA (1) | OA09274A (en) |
| WO (1) | WO1990012161A1 (en) |
| ZA (1) | ZA901120B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1978732A (en) * | 1934-10-30 | Trenching machine | ||
| US1808898A (en) * | 1929-10-17 | 1931-06-09 | Bay City Shovels Inc | Turntable lock |
| DE829277C (en) * | 1949-09-07 | 1952-01-24 | Fried Krupp Stahlbau Rheinhaus | Paddle wheel drive |
| DE885679C (en) * | 1951-11-20 | 1953-08-06 | Luebecker Maschb Ag | Swivel drive for swivel excavator |
| DE1112462B (en) * | 1957-04-05 | 1961-08-03 | Weserhuette Ag Eisenwerk | Device for excavators or similar heavy equipment for swiveling a heavy equipment part with respect to a stationary equipment part supporting this equipment part |
| GB844955A (en) * | 1957-07-30 | 1960-08-17 | Aveling Barford Ltd | Improvements in or relating to locking devices or sprags for gear wheels |
| US2996168A (en) * | 1957-08-12 | 1961-08-15 | Cleveland Trencher Co | Discharge mechanism |
| US4102461A (en) * | 1974-07-19 | 1978-07-25 | Ingebret Soyland | Excavator with low center of gravity |
| AT364321B (en) * | 1980-02-01 | 1981-10-12 | Voest Alpine Ag | ROTARY BUCKET WHEEL EXCAVATOR |
| DE3100561A1 (en) * | 1981-01-10 | 1982-08-12 | Fried. Krupp Gmbh, 4300 Essen | Bucket-wheel machine and method of operating it |
-
1989
- 1989-04-13 DE DE3912065A patent/DE3912065C1/de not_active Expired - Lifetime
-
1990
- 1990-01-16 WO PCT/EP1990/000083 patent/WO1990012161A1/en not_active Ceased
- 1990-01-16 EP EP90901782A patent/EP0534946A1/en not_active Withdrawn
- 1990-01-16 AU AU48484/90A patent/AU620490B2/en not_active Ceased
- 1990-02-14 ZA ZA901120A patent/ZA901120B/en unknown
- 1990-02-22 CA CA002010736A patent/CA2010736A1/en not_active Abandoned
- 1990-04-11 NZ NZ233287A patent/NZ233287A/en unknown
- 1990-11-26 OA OA59904A patent/OA09274A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE3912065C1 (en) | 1990-05-31 |
| WO1990012161A1 (en) | 1990-10-18 |
| NZ233287A (en) | 1991-11-26 |
| AU4848490A (en) | 1990-11-05 |
| OA09274A (en) | 1992-08-31 |
| EP0534946A1 (en) | 1993-04-07 |
| AU620490B2 (en) | 1992-02-20 |
| ZA901120B (en) | 1990-11-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |