Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25D—PERCUSSIVE TOOLS
  • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
  • B25D9/14—Control devices for the reciprocating piston
  • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
  • F15B1/02—Installations or systems with accumulators
  • F15B1/04—Accumulators
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25D—PERCUSSIVE TOOLS
  • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
  • B25D2209/002—Pressure accumulators
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25D—PERCUSSIVE TOOLS
  • B25D2222/00—Materials of the tool or the workpiece
  • B25D2222/72—Stone, rock or concrete
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25D—PERCUSSIVE TOOLS
  • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
  • B25D2250/365—Use of seals
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
  • F15B1/02—Installations or systems with accumulators
  • F15B1/04—Accumulators
  • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
  • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
  • F15B1/12—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery
  • F15B1/125—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery characterised by the attachment means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
  • F15B15/08—Characterised by the construction of the motor unit
  • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B2201/00—Accumulators
  • F15B2201/20—Accumulator cushioning means
  • F15B2201/205—Accumulator cushioning means using gas
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B2201/00—Accumulators
  • F15B2201/30—Accumulator separating means
  • F15B2201/315—Accumulator separating means having flexible separating means
  • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B2201/00—Accumulators
  • F15B2201/30—Accumulator separating means
  • F15B2201/315—Accumulator separating means having flexible separating means
  • F15B2201/3156—Accumulator separating means having flexible separating means characterised by their attachment

Definitions

• the invention further relates to a rock breaking machine provided with a pressure accumulator for storing pressure energy during operation of the machine and its reciprocating percussion piston. Moreover, the invention relates to a method for storing pressure energy.
• the casing of the accumulator is pro vided with a feed port for feeding pre-filling gas into the gas space, whereas the hydraulic space is connectable to operating hydraulic system of the hy draulic rock breaking machine.
• outer side surfaces of the sleeve-like support portion of the flange element are curved at least at their distal end por tions.
• the curved surfaces are gentle to the membrane.
• number of the pressure channels is at least 12, but may be up to 24.
• the membrane is made of other poly mer or plastic material than polyurethane.
• the solution relates to a hydraulic rock breaking machine, which may be a hydraulic breaking hammer or a rock drill ing machine.
• the machine is provided with a percussion device or an impact device comprising a frame and a piston arranged inside the frame.
• the piston is configured to perform reciprocating longitudinal movement due to pressure of hydraulic fluid fed to the percussion device.
• a breaking tool or a drilling tool may be connected to the percussion device and may receive impact pulses from the percussion device.
• the percussion device has a hydraulic system comprising a feed port for feeding hydraulic pressure fluid into the percussion device and a discharge port for discharging the pressure fluid out of the per cussion device.
• the flange element may comprise a sleeve-like protrusion extending from the rear end of the percussion device towards the front end of the percussion device. Then the sleeve-like protrusion and the basic body of the percussion device may have an overlapping connec tion.
• the protrusion may provide support surfaces for a control valve of the percussion device.
• Figure 2 discloses a rear end 7 or upper end portion of a breaking hammer 1.
• a hydraulic accumulator 8 is located at an extension of a percus sion device 4, which comprises a piston 9 movable in impact direction A and return direction B.
• the piston 9 has executed its striking movement and is located in its lowermost position.
• the accumulator 8 comprises a casing 10 which is mounted against an axial mounting surface 11 of a body 12.
• the accumulator 8 further comprises a flange element 13, which may be pressed by means of fastening screws of the casing 10 against the mounting surface 11.
• Inside the accumulator 8 is an elastic membrane 16, edges of which are mounted between the casing 10 and the flange element 13.
• Reciprocating movement of the piston 9 is controlled by means of a sleeve-like control valve 24 arranged around the piston 9 and pro vided with control surfaces for controlling hydraulic pressure affecting on work ing pressure surfaces of the piston 9.
• a first working pressure surface (not shown) is continuously pressurized and moves the piston 9 towards the return direction B.
• Hydraulic pressure affecting on a second working pressure surface and a third working pressure surface is controlled by means of the control valve 24.
• Working pressure surfaces are subjected selectively to hydraulic fluid flow of a high pressure circuit and tank pressure circuit.
• the top end 22 of the piston 9 is subjected continuously to low pressure since the accumulator 8 is connected to a low pressure circuit.
• Figure 2 further discloses that the flange element 13 may comprise a sleeve-like portion 28 protruding towards the front end and surrounds the control valve 24. Then the flange element 13 is capable of providing support for the control valve 24 and is also provided with pressure channels. Thanks to the sleeve-like portion 28 of the flange element 13 the structure of the basic body 12 may be simple. Different collars, fittings and pressure channels are easier to form to the separate component 13 than to the large-sized body 12.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Earth Drilling (AREA)
• Percussive Tools And Related Accessories (AREA)
• Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
• Disintegrating Or Milling (AREA)
• Drilling And Exploitation, And Mining Machines And Methods (AREA)
• Crushing And Grinding (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=69467343

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Citations (5)

Family Cites Families (9)

• 2020
  • 2020-01-31 EP EP20155036.5A patent/EP3858550A1/en active Pending
• 2021
  • 2021-01-29 WO PCT/EP2021/052121 patent/WO2021152098A1/en not_active Ceased
  • 2021-01-29 JP JP2022545836A patent/JP7773984B2/ja active Active
  • 2021-01-29 US US17/796,336 patent/US12083663B2/en active Active
  • 2021-01-29 KR KR1020227024219A patent/KR102853463B1/ko active Active
  • 2021-01-29 CN CN202180011257.5A patent/CN115038551B/zh active Active

Patent Citations (5)

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