Classifications

• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
  • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
  • E02D3/02—Improving by compacting
  • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil

Definitions

• a SOIL COMPACTING VIBRATOR The present invention concerns a soil compacting vibrator for hydraulic operation mounted for example on a digging machine.
• Soil compacting vibrators are known and can be utilized mounted for example on digging machines or other machines.
• the vibrators of the prior art are designed so as to comprise a vibrating device for example consisting of one or more eccentrics, and they arc intended to be carried by the digging machine or for example by a crane in the case that they are to be lowered into a pit.
• the vibrators may be hydraulically operated or operated by diesel or petrol.
• diesel or petrol operated vibrators have disadvantages which begin already in the plane of the ground and which thereafter increase with that dept under the plane of the ground at which operation is carried out, namely on the one hand that these machines, which generally are manually operated and self-propelled, deliver exhaust which fills the pit in which they operate, which comprises a health hazard to the operator, and on the other hand that the machines are heavy and therefore have to be lowered into the pit or at least be lifted up by a crane or alternatively by a digging machine.
• a soil compacting vibrator of conventional type is illustrated in Canadian Patent Specification No. 1 005 663, in which a frame which is intended to be suspended by the arm of a digging machine comprises an eccentric which is adapted to be operated by the hydraulic system of the digging machine, in addition to which the frame is interconnected to a soil compacting vibration plate via four elastomeric vibration attenuators which are located one at each corner of the frame. These attenuators interconnect the frame with the soil compacting vibratory plate and are mounted with their axes of symmetry in the transverse direction of the digging machine. The weakest direction of loading of the attenuators then becomes the same direction as that in which the forces of the digging machine become the greatest, i.e.
• the attenuators have to be mounted in a specific relationship to the vibratory unit which has been selected.
• the vibratory unit does not have a directional centrifugal force, i.e. the vibratory unit has equal centrifugal force around the whole revolution of the eccentric leftwards or rightwards. It would be more favourable if the centrifugal force were to be greater in a specific direction (the direction of operation) and smaller in another (exactly the opposite).
• the present invention has the object.of obviating the disadvantages mentioned above by disclosing a soil compacting vibrator of hitherto unknown type.
• the relevant soil compacting vibrator can be designated as a "diagonal assembly with a V-shaped profile".
• the vibrator has a lower portion in the form of a bottom plate which when vibrating is to engage the ground or the material which is to be vibrated, respectively.
• the bottom plate has two V-positioned ends, and the upper portion of the vibrator has two
• V-positioned end legs which are intended to cooperate with the ends of the bottom plate via vibration attenuators which for example may consist of rubber.
• the tips of the V-positioned ends can either face towards each other or away from each other. If the V-positioned ends have their end tips facing each other, i.e. have their convex parts facing the centre, a number of favourable and advantageous characteristics are achieved, particularly from the viewpoint that the soil compacting vibrator will have to stand up against the heavy stresses which are inevitable if it is to be utilized as an effective grading and levelling implement.
• the vibrator includes the mentioned vibration attenuators which are mounted diagonally with respect to the bottom plate of the vibrator.
• the soil compacting vibrator comprises an upper portion having a mount for a supporting arm, for example in a digging machine, wherein said arm, when being lifted, for example can extend in the longitudinal direction of said upper portion and the vibrator, and a lower portion comprising a bottom plate and the vibratory unit driven by a hydraulic motor, with vibration attenuators, for example of rubber, being disposed between the upper portion of the vibrator and its lower portion.
• the vibratory unit can be positioned diagonally on the vibrator and can comprise one or more motors having hydraulic couplings and hoses as well as an interconnecting unit protected by said upper portion and end plates.
• the bottom side of the upper portion can be configured as an engagement surface for engaging the end plates so as to stop the motion of the upper portion of the vibrator towards the lower portion so as to avoid too great a load on the vibration attenuators.
• 1 is the upper portion of the soil compacting vibrator
• 1B is an arbitrary type and model of implement mount which is connected to a plate 1C in the upper portion and which is adapted to the type of machine which is to be used as a carrier
• 2 are the end legs of the upper portion which are positioned in V-shape
• 3 are side plates which reinforce the end legs of the upper portion and which furthermore are intended to function as mounting points if for example a traction device is disposed for performing compacting while being pulled by an appropriate traction vehicle, for example a wheel loader
• 4 is an aperture in the upper portion 1 through which hydraulic hoses from the motor of the soil compacting vibrator are conducted to the top side of the upper portion and to a valve unit which is mounted there and is designated 5
• the designation 6 refers to an internal pair of hoses
• 7 is a hydraulic motor which is located in the lower portion 13 of the vibrator
• the designation 8 refers to a vibratory unit with directed action, for example twin eccentric wheels which are disposed such as to provide
• vibration attenuators there are four vibration attenuators in the illustrated embodiment, but additional vibration attenuators can exist, for example by doubling the present four vibration attenuators.
• the vibration attenuators are mounted on the insides of the bottom ends 9, but there is nothing to prevent mounting them on the outsides, i.e. the concave side in the relevant case or, if desired, both on the outsides and the insides.
• the V-shaped end plates 9 form a wedge-shaped space which increases outwards the closer towards the centre the end plates are welded or fastened by bolts.
• said space can never become too great.
• the end plates 9 are made as tall as possible.
• their upper portions are made to become engagement members against the projecting sections of the plate 1C in the upper portion 1 outside of the end legs 2 of the latter. In this manner a large volume of the compacting masses and relief of the vibration attenuators against heavy stresses in vertical directions become included in one and the same inventive concept.
• the difference in counterforce in the shearing direction and the compression direction, respectively, in one single vibration attenuator of a type which is used on a soil compacting machine of medium size is for example the following: In shear loading and a resilience distance of 25 millimetres 390 kilos;
• V-profiles of the end plates 9 and the end legs 2 in the mentioned example are secured to the bottom plate 11 and to the upper portion 1 at right angles and that it is possible and in certain cases can become necessary to have end plates 9 and end legs 2 sloping a specific number of degrees in one or the other direction instead.

Landscapes

• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Soil Sciences (AREA)
• Environmental & Geological Engineering (AREA)
• Agronomy & Crop Science (AREA)
• Mining & Mineral Resources (AREA)
• Paleontology (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Shovels (AREA)
• Soil Working Implements (AREA)
• Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
• Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20379357

Family Applications (1)

Country Status (4)

Cited By (1)

Citations (4)

• 1990
  • 1990-05-02 SE SE9001573A patent/SE466164B/sv not_active IP Right Cessation
• 1991
  • 1991-04-18 EP EP19910909187 patent/EP0528890A1/en not_active Withdrawn
  • 1991-04-18 WO PCT/SE1991/000278 patent/WO1991017322A1/en not_active Application Discontinuation
  • 1991-04-18 CA CA002081783A patent/CA2081783A1/en not_active Abandoned

Patent Citations (4)

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