IT1319478B1 - HYDRAULIC GROUP WITH AUTOMATIC REGENERATIVE SYSTEM TYPICALLY FOR WOOD SPLITTERS OPERATED BY A SINGLE-ACTING JACK - Google Patents

HYDRAULIC GROUP WITH AUTOMATIC REGENERATIVE SYSTEM TYPICALLY FOR WOOD SPLITTERS OPERATED BY A SINGLE-ACTING JACK

Info

Publication number
IT1319478B1
IT1319478B1 IT2000RE000125A ITRE20000125A IT1319478B1 IT 1319478 B1 IT1319478 B1 IT 1319478B1 IT 2000RE000125 A IT2000RE000125 A IT 2000RE000125A IT RE20000125 A ITRE20000125 A IT RE20000125A IT 1319478 B1 IT1319478 B1 IT 1319478B1
Authority
IT
Italy
Prior art keywords
piston
operated
cylinder
system typically
regenerative system
Prior art date
Application number
IT2000RE000125A
Other languages
Italian (it)
Inventor
Elio Magnani
Original Assignee
Bell Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bell Srl filed Critical Bell Srl
Priority to IT2000RE000125A priority Critical patent/IT1319478B1/en
Publication of ITRE20000125A0 publication Critical patent/ITRE20000125A0/en
Priority to NO20015478A priority patent/NO319360B1/en
Priority to DE60114347T priority patent/DE60114347T2/en
Priority to AT01204395T priority patent/ATE307980T1/en
Priority to EP01204395A priority patent/EP1213486B1/en
Priority to DK01204395T priority patent/DK1213486T3/en
Priority to ES01204395T priority patent/ES2248225T3/en
Publication of ITRE20000125A1 publication Critical patent/ITRE20000125A1/en
Application granted granted Critical
Publication of IT1319478B1 publication Critical patent/IT1319478B1/en

Links

Classifications

    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L7/00—Arrangements for splitting wood
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F15B2011/0243—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits the regenerative circuit being activated or deactivated automatically
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3058—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3122—Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
    • F15B2211/3133—Regenerative position connecting the working ports or connecting the working ports to the pump, e.g. for high-speed approach stroke
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7716—Control of direction of movement of the output member with automatic return
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/775—Combined control, e.g. control of speed and force for providing a high speed approach stroke with low force followed by a low speed working stroke with high force, e.g. for a hydraulic press

Abstract

A hydraulic operating system for a tool, typically for a log splitting machine, comprising a single acting hydraulic cylinder-piston unit (9), a motor-driven pump (1) and a hydraulic distributor (5) arranged to selectively connect the piston chamber (90) of said cylinder-piston unit (9) to the pump delivery (4) or to discharge (15), in which the piston rod chamber (91) of the cylinder-piston unit (9) is connected to the piston chamber (90) by a conduit (13) comprising a unidirectional valve (130) which prevents oil transfer towards the piston rod chamber (91), and to the oil reservoir (3) by a discharge conduit (12) closed by a preset overpressure valve (120) sensitive to the pump delivery pressure and by a separate suction conduit (14) provided with a unidirectional valve (140) which prevents oil flow towards the reservoir (3). <IMAGE>
IT2000RE000125A 2000-12-05 2000-12-05 HYDRAULIC GROUP WITH AUTOMATIC REGENERATIVE SYSTEM TYPICALLY FOR WOOD SPLITTERS OPERATED BY A SINGLE-ACTING JACK IT1319478B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
IT2000RE000125A IT1319478B1 (en) 2000-12-05 2000-12-05 HYDRAULIC GROUP WITH AUTOMATIC REGENERATIVE SYSTEM TYPICALLY FOR WOOD SPLITTERS OPERATED BY A SINGLE-ACTING JACK
NO20015478A NO319360B1 (en) 2000-12-05 2001-11-08 A log splitting
DE60114347T DE60114347T2 (en) 2000-12-05 2001-11-16 Wood splitter with a differential circuit of a single-acting hydraulic cylinder
AT01204395T ATE307980T1 (en) 2000-12-05 2001-11-16 WOOD SPLITTING DEVICE WITH A DIFFERENTIAL CIRCUIT OF A SINGLE-ACTING HYDRAULIC CYLINDER
EP01204395A EP1213486B1 (en) 2000-12-05 2001-11-16 A log splitting machine with automatic regenerative system of a single-acting hydraulic cylinder
DK01204395T DK1213486T3 (en) 2000-12-05 2001-11-16 Wood split machine with automatic regenerative system for a single acting hydraulic cylinder
ES01204395T ES2248225T3 (en) 2000-12-05 2001-11-16 TRUNK MACHINE WITH AUTOMATIC REGENERATION SYSTEM OF A SINGLE EFFECT HYDRAULIC CYLINDER.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2000RE000125A IT1319478B1 (en) 2000-12-05 2000-12-05 HYDRAULIC GROUP WITH AUTOMATIC REGENERATIVE SYSTEM TYPICALLY FOR WOOD SPLITTERS OPERATED BY A SINGLE-ACTING JACK

Publications (3)

Publication Number Publication Date
ITRE20000125A0 ITRE20000125A0 (en) 2000-12-05
ITRE20000125A1 ITRE20000125A1 (en) 2002-06-05
IT1319478B1 true IT1319478B1 (en) 2003-10-10

Family

ID=11454000

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2000RE000125A IT1319478B1 (en) 2000-12-05 2000-12-05 HYDRAULIC GROUP WITH AUTOMATIC REGENERATIVE SYSTEM TYPICALLY FOR WOOD SPLITTERS OPERATED BY A SINGLE-ACTING JACK

Country Status (7)

Country Link
EP (1) EP1213486B1 (en)
AT (1) ATE307980T1 (en)
DE (1) DE60114347T2 (en)
DK (1) DK1213486T3 (en)
ES (1) ES2248225T3 (en)
IT (1) IT1319478B1 (en)
NO (1) NO319360B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE523110C2 (en) 2002-07-15 2004-03-30 Stock Of Sweden Ab hydraulic System
SI22050B (en) * 2005-06-01 2009-04-30 Tajfun Planina Proizvodnja Strojev D.O.O. Driving and controlling unit of device for splitting firewood and controlling procedure for this kind of device
US8752372B2 (en) 2010-05-21 2014-06-17 Deere & Company Regenerative hydraulic circuit for dump truck bin lift cylinder

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800110A (en) * 1955-08-15 1957-07-23 Lake Erie Machinery Corp Hydraulic circuit for heavy duty presses and the like
US3077214A (en) * 1959-08-27 1963-02-12 Waco Aircraft Co Log splitter
FR2057287A5 (en) * 1969-08-08 1971-05-21 Luchaire Sa
US3640323A (en) * 1969-11-05 1972-02-08 Sawmill Hydraulics Inc Apparatus for splitting and chopping timber
FR2102291B1 (en) * 1970-08-17 1974-08-19 Amada Co Ltd
SE9200484L (en) * 1992-02-18 1993-08-19 Jerzy Janczak Hydraulic power tool
IT1287641B1 (en) * 1996-05-08 1998-08-06 Bell Srl HYDRAULIC SERVICE SYSTEM FOR SPLITTER MACHINES

Also Published As

Publication number Publication date
NO319360B1 (en) 2005-07-18
EP1213486A2 (en) 2002-06-12
EP1213486B1 (en) 2005-10-26
ITRE20000125A1 (en) 2002-06-05
EP1213486A3 (en) 2004-01-07
DE60114347D1 (en) 2005-12-01
DK1213486T3 (en) 2006-03-13
ITRE20000125A0 (en) 2000-12-05
DE60114347T2 (en) 2006-04-20
NO20015478D0 (en) 2001-11-08
ATE307980T1 (en) 2005-11-15
ES2248225T3 (en) 2006-03-16
NO20015478L (en) 2002-06-06

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