Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
  • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
  • E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
  • E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
  • E01C19/286—Vibration or impact-imparting means; Arrangement, mounting or adjustment thereof; Construction or mounting of the rolling elements, transmission or drive thereto, e.g. to vibrator mounted inside the roll

Definitions

• This invention concerns an arrangement of a vibratory roller drum, provided with a vibratory mechanism with directed vibration.
• the housing of the vibratory exciter is provided with a pair of shafts with eccentric weights in its lower part, while there is another shaft located in the upper part.
• This third shaft drives - either in concurrent or opposite direction - the above-mentioned shafts with eccentric weights.
• Such arrangement of the vibratory exciter of a compaction machine makes possible to adjust higher or lower amplitude of vibration.
• the disadvantage is, that the level of amplitude adjustment is quite inaccurate, as this solution does not enable exact positioning of "the two shafts with the eccentric weights against the third driving shaft. This inaccurateness causes problems at compaction works.
• a vibratory roller drum provided with a vibratory mechanism with directed vibration, which consists of a drum, on whose axis there is located a motor fixed to a gearbox and connected to a vibratory box of a vibratory mechanism with directed vibration
• the gearbox consists of a cage containing bearings which hold gears and pinions and a vibratory box containing bearings with eccentric shafts, while such shafts are mutually connected via gears, and whose principal consists in that the gearbox is movably connected to the vibratory box, which is fixed to the shell of the drum, through a bearing.
• the vibratory box of the drum which contains the vibratory mechanism with directed vibration, has the central shaft with eccentric weight and two counter-rotating shafts, both with eccentric weights as well. These shafts generate centrifugal forces that are transferred to the drum shell via bearings, which the said shafts are hold in.
• the position of the cage, which is hold in the gearbox, can be changed by a movement of the driven shaft towards the segment, which is fixed to the cage.
• Such change of position of the cage is independent on the position of the vibratory box.
• the advantage of this design is, that it enables to turn the cage into various positions around its axis, as well as smooth stepless alternation of the direction of vibration force vector, within the 0° to 180° range.
• Another advantage of this arrangement is, that the cage is turned in the same direction, as the vibration force vector of the vibratory mechanism, which is generated by the eccentrics.
• the cage arrangement within the gearbox enables a coaxial output of counter-rotating independent shafts, namely the shaft 17 and the hollow shaft 18. These shafts connect the gearbox with the vibratory box.
• the direction of the vibration force vector of the vibratory drum with the mechanism with directed vibration is turned by the same angle, as the angle of the gearbox. Therefore the direction of the vibration force vector can be adjusted in required direction from vertical direction up to horizontal one.
• the direction of the vibration force vector is independent on the position of the vibratory box and it is controlled by the rotary-mounted cage, while the position of the cage is independent on the position of the vibratory box.
• Fig.l includes a schematic general view of the vibratory roller drum containing the vibratory mechanism with directed vibration.
• Fig. 2 brings the view of the general arrangement of the gearbox.
• Fig. 3 illustrates in more detail the arrangement of the gearbox cage. Examples of Implementation of the Invention
• the vibratory roller drum which contains the vibratory mechanism with directed vibration, consists of the drum 29, on whose axis 30 there is mounted the motor 16, the gearbox 32 and the vibratory box 31.
• the motor 16 is fixed to the gearbox 32, which is then rotary connected to the vibratory box 31 via the bearing 35. Torque from the motor 16 (a hydromotor being the most convenient choice) is transferred through the coupling 33 to inside of the gearbox 32.
• the gearbox 32 consists of the moving cage 34, which holds the gears 10, 13, the pinions 11, 12 and the shafts 17, 18.
• the cage 34 is supported on the bearings 41A and 41B, which enable its easy turning towards the gearbox 32.
• the vibratory box 31 consists of the eccentrics 22, 23, 24, the shafts 19, 20, 21, the layshaft 40, the gears 25, 26, 27, 28 and the bearings 37A, 37B, 38A, 38B, 39A and 39B.
• the other part of the torque is transferred from the left gear 10 through the inserted pinions ⁇ and 12 onto the right gear 13 and then to the hollow shaft 18 to inside of the vibratory box 31 . .
• the hollow shaft 18 is then connected to the left shaft 19.
• the left shaft 19 holds the left eccentric 22 and the gear 25, which mesh with the gear 26.
• the gear 26 is fixed to the gear 27 via the layshaft 40; the gear 27 is in mesh with the gear 28.
• This gear 28 is fixed on the right shaft 21 , which holds the right eccentric 24.
• the layshaft 40 is located out of the drum 39 axis 30, the torque can be transferred from the left shaft 19 onto the co-rotating right shaft 21, while bypassing the counter-rotating central shaft 20, which is located in the axis 30 of the drum 29.
• the left gear 10 located in the gearbox 34 5 which is fixed to the shaft 17, is in mesh with gearing of the left pinion 11, while the left pinion 11 is in mesh with the right pinion 12.
• the right pinion 12 is in mesh with the right gear 13, fixed to the hollow shaft 18.
• This arrangement of the cage 34 with gears 10, 13 and pinions H, 12 inside the gearbox 31 enables the co-axial output of counter-rotating independent shafts 17 and 18.
• the counter- rotating output of the two independent shafts 17 and 18 is based on the shaft 17 fixed to the left gear 10 and the hollow shaft fixed to the right gear 13, while the off number of meshing pairs of gears changes the sense of rotation.
• the opposite sense of rotation of the central eccentric 23 against the eccentrics 22 and 24 - all of them being mounted together in the vibratory box 31 - causes directioning of the vibratory force vector into the selected direction, normal to the axis 30 of the drum 29.
• the direction of the vibratory force vector of the vibratory mechanism of the compaction roller with directed vibration, generated by eccentrics 22, 23 and 24 can be turned by the same angle as the cage 34 of the gearbox 32.
• This compaction roller drum containing the vibratory mechanism with directed vibration, as according to this invention, can be used for all compaction machines with both one-part and split drum that are required to generate directed vibration (with regards to the compaction job, etc.).

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Road Paving Machines (AREA)
• Apparatuses For Generation Of Mechanical Vibrations (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=29430781

Family Applications (1)

Country Status (3)

Cited By (10)

Citations (2)

• 2002
  • 2002-05-15 CZ CZ20021680A patent/CZ20021680A3/cs not_active IP Right Cessation
• 2003
  • 2003-05-07 AU AU2003270203A patent/AU2003270203A1/en not_active Withdrawn
  • 2003-05-07 WO PCT/CZ2003/000027 patent/WO2003097940A1/en active Application Filing

Patent Citations (2)

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