Classifications

• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F5/00—Dredgers or soil-shifting machines for special purposes
  • E02F5/30—Auxiliary apparatus, e.g. for thawing, cracking, blowing-up, or other preparatory treatment of the soil
  • E02F5/32—Rippers
  • E02F5/323—Percussion-type rippers
• • 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
  • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
  • E02F3/966—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of hammer-type tools
• • 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
  • E02F9/22—Hydraulic or pneumatic drives
  • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels

Definitions

• the object of the present invention is a hydraulic hammer-type device (ripper), which is embodied as an implement for an excavator that hits and tears stone, concrete, asphalt, or any other type of soil and which consists essentially of in a hydraulic motor that receives pressure and oil flow from the excavator and is responsible for driving a series of elements that percuss the grate, printing a striking motion on the ground.
• ripper hydraulic hammer-type device
• hydraulic hammers are well known in the field of public works. These, generally, are composed of an essentially cylindrical body, which houses inside a piston configured to hit a spike, which floating on at least one bush, is responsible for attacking the ground.
• the pica has a vertical path.
• the operation of the hammer essentially, has as its origin the reception of oil from the excavator, putting pressure on the piston, so that it goes down very fast and hits the pit, and this, in turn, to the ground.
• the piston rises, the piston returns the oil to the excavator and loads a nitrogen chamber, so that the pressure of the nitrogen pushes the piston strongly, hitting the pit, and consequently to the ground.
• Operation may vary in certain details depending on the manufacturer, but the basic principle of operation is that already described.
• the present invention relates to a hydraulic hammer device for excavating machines comprising at least one grating and an energy accumulator where the energy accumulator is jointly connected to said grating and located in the longitudinal axis thereof, being on said axis where the attack on the ground between the folded and unfolded positions of the grating is carried out and characterized in that it comprises a cylinder that is integrally connected to the grating and housed therein, being longitudinally aligned with the said longitudinal axis of the grid.
• it comprises at least two cylinders, integral to the grille and housed therein, forming an angle to each other whose vertex coincides with the axis of attack on the ground; and where said cylinders each comprise an energy chamber, the energy chambers of the cylinders communicating with each other, said cylinders being configured for alternate movement.
• the pressure chamber in the upper part of the cylinder is understood to be compressed due to the rise of the piston (caused in turn by the injection of oil from the excavator) and which is responsible for the thrust of said plunger in its descent due to the accumulated pressure.
• the energy chamber is filled with nitrogen and / or in general, any compressible fluid.
• Another advantage to highlight is the use of energy and increased performance compared to the hammers described in the prior art. Indeed, when the first cylinder goes down, the second cylinder goes up and vice versa. However, keep in mind that the cylinder that goes down always goes down faster than the one that goes up. In normal operation, the oil coming from the machine goes up a first cylinder, while the second cylinder goes down due to nitrogen pressure. At the end of the climb, the first cylinder commands a signal for the second cylinder to start rising as well, causing the first cylinder to fall. The cylinder that goes down, since the descent is faster than the climb, impacts and waits to receive the signal from the other cylinder. Therefore, the actual hitting frequency is approximately double that of a traditional hammer, and the oil is always used by one of the two cylinders, without the need for return or oil accumulation chambers, improving the overall performance of the machine .
• a piston does not have the same thrust at the start of the race as at the end.
• the energy chambers of both cylinders are communicated.
• the pressure in both chambers would be approximately equal, therefore, the pressure would remain constant in the stroke of both cylinders.
• the pressure in both chambers is not going to be 100% constant since, as we have said, the cylinder that goes down makes it faster than the one that goes up. Even so, the pressure fluctuation is minimal, which significantly improves the performance compared to traditional hammers, without changing the pressure coming from the machine and without sending the oil to the return tank.
• the hit in the body of the grid generates an upward reaction force.
• This force accumulates in the energy accumulator, preferably a pneumatic element, although other elements of similar characteristics are not discarded.
• the reaction to the beating compresses the accumulator, that is, it charges it, while at the time of striking, the accumulator is discharged, that is, it is decompressed, adding the accumulated force to that of the beating itself due to the cylinders , since the accumulator is aligned with the axis of attack, as indicated.
• the accumulator dampens the transmission of vibrations to the rest of the machine.
• the device object of the invention improves the performance of known hydraulic or pneumatic hammers working in especially hard terrain, further improving their useful life.
• Another advantage is that the combination of a grating and a hammer allows both the ground to be chopped (by the effect of the cylinder) and to tear off the ground (by the effect of the grating) which is impossible to date.
• FIG. 1 shows a schematic view of the device object of the invention in a practical embodiment with two cylinders (2,3).
• FIG. 2 is a view of the grate (1) that forms part of the invention, and of the arrangement of the cylinders (2,3) inside it.
• FIG. 3 shows a perspective view of the device object of the invention, where the arrangement of the cylinders (2,3) in relation to the device assembly is shown, while FIG. 4 shows a complete view of the assembly. , except the external protections of the grate (1).
• FIG. 5 shows a schematic view of the device object of the invention in a practical embodiment with a single cylinder.
• the hydraulic firing device for excavating machines, object of the present invention is used to hit and tear extremely hard terrain, such as stone (granite) and the like.
• the device essentially comprises a recess (1) proper, at whose lower end a tooth (1 1) is attached to the body of the repository (1) by means of a bolt (12) or the like, such that said tooth (1 1) is replaceable in case of wear.
• two cylinders (2,3) are housed in solidarity with the body of the grating (1) and arranged with each other in such a way that the vector of force (F2, F3) of both cylinders (2,3) is oriented towards the same point coinciding with the ground attack vector of the grille (F1) and which in this embodiment coincides with the point of attachment (12) of the tooth (1 1) with the grate (1).
• each cylinder (2,3) in its upper part comprises an energy chamber (21, 31) filled with nitrogen (in general, a compressible fluid) such that when the piston of the cylinder rises as a result of the oil injection coming from the excavator machine (not shown in the attached figures) the fluid (i.e. nitrogen) is compressed and when the oil stops being injected by the machine, the pressure in said energy chambers (21, 31) is Push the cylinder (2,3) down, knocking on the body of the grate (1) in an impact region (14).
• nitrogen in general, a compressible fluid
• Said impact region (14) in another practical embodiment may be embodied as a grille attached to the grille (1) and replaceable in case of deformation.
• both chambers (21, 31) To maintain a quasi-constant pressure in both chambers (21, 31), they are communicated with each other (22), which facilitates the alternative movement of both cylinders (2,3) since when the first cylinder (2) falls, the Second cylinder (3) goes up and vice versa. Since the one that goes down is always faster, when the second cylinder (3) rises and reaches the end, it sends a signal to a valve so that the first cylinder (2), which was waiting, starts to rise as well. Thus, the alternative movement between both cylinders (2,3) involves the injection of oil into one or the other cylinder, without return to the machine.
• the striking speed in another particular embodiment, is adjustable through the injection of oil (more or less oil) into the cylinders (2,3) depending on the hardness of the ground.
• the regulating element may be a stopcock, a valve or the like.
• FIG. 5 it is shown how the device comprises a recess (1) proper, at the lower end of which a tooth (11) is attached to the body of the recess (1) by means of a bolt (12) or the like, such that said tooth (1 1) is replaceable in case of wear.
• a cylinder (2) is housed in solidarity with the body of the grate (1) and arranged together so that the force vector (F2) of the cylinder (2) is aligned with the ground attack vector of the grating (F1) and which in this embodiment coincides with the point of attachment (12) of the tooth (1 1) with the grating (1).
• the cylinder strikes against an impact region (14), where said impact region (14) in another practical embodiment can be embodied as a grille attached to the grille (1) and replaceable in case of deformation.
• the striking speed in another particular embodiment, is adjustable through the injection of oil (more or less oil) into the cylinder (2) depending on the hardness of the ground.
• the regulating element may be a stopcock, a valve or the like.

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)
• Percussive Tools And Related Accessories (AREA)
• Fluid-Pressure Circuits (AREA)

Priority Applications (18)

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Publications (1)

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Citations (11)

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• 2013
  • 2013-09-30 CN CN201380051872.4A patent/CN104781475A/zh active Pending
  • 2013-09-30 US US14/433,343 patent/US20150275474A1/en not_active Abandoned
  • 2013-09-30 EA EA201590668A patent/EA201590668A1/ru unknown
  • 2013-09-30 BR BR112015006987A patent/BR112015006987A2/pt not_active IP Right Cessation
  • 2013-09-30 JP JP2015535070A patent/JP2015532370A/ja active Pending
  • 2013-09-30 EP EP13843264.6A patent/EP2910689A4/de not_active Withdrawn
  • 2013-09-30 MX MX2015003480A patent/MX2015003480A/es unknown
  • 2013-09-30 CA CA 2887378 patent/CA2887378A1/en not_active Abandoned
  • 2013-09-30 KR KR1020157008807A patent/KR20150063412A/ko not_active Application Discontinuation
  • 2013-09-30 SG SG11201502383YA patent/SG11201502383YA/en unknown
  • 2013-09-30 AU AU2013326422A patent/AU2013326422A1/en not_active Abandoned
  • 2013-09-30 WO PCT/ES2013/070672 patent/WO2014053686A1/es active Application Filing
  • 2013-09-30 PE PE2015000375A patent/PE20150588A1/es not_active Application Discontinuation
• 2015
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  • 2015-04-29 EC ECIEPI201517016U patent/ECSMU15017016U/es unknown
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  • 2015-12-16 HK HK15112363.7A patent/HK1211639A1/xx unknown

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