US3677604A - Hydraulic control for hydraulic bucket having reciprocating teeth - Google Patents

Hydraulic control for hydraulic bucket having reciprocating teeth Download PDF

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Publication number
US3677604A
US3677604A US74568A US3677604DA US3677604A US 3677604 A US3677604 A US 3677604A US 74568 A US74568 A US 74568A US 3677604D A US3677604D A US 3677604DA US 3677604 A US3677604 A US 3677604A
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US
United States
Prior art keywords
bucket
hydraulic
jack
hammer
teeth
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Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US74568A
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English (en)
Inventor
Pierre J Leyrat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Poclain SA
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Poclain SA
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Publication date
Application filed by Poclain SA filed Critical Poclain SA
Application granted granted Critical
Publication of US3677604A publication Critical patent/US3677604A/en
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    • 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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/402—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors
    • E02F3/405—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors using vibrating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S37/00—Excavating
    • Y10S37/904—Vibration means for excavating tool

Definitions

  • ABSTRACT This invention relates to a device for the hydraulic control of a Sept. 29, 1969 France ..6933171 bucket in public works machines provided with at least one movable tooth coupled to a hydraulic hammer, comprising at [52] U.S.
  • the present invention relates to a device for the hydraulic control of a bucket in public works machines.
  • Such a bucket has the advantage of having a good penetration, which is always an asset, more particularly for the work to be carried out in hard materials such as rocks, for example.
  • the principle of such a bucket is attractive, the known embodiments do not lead to a good efficiency.
  • the cause of this state of affairs resides in the hydraulic controls of the bucket and of the vibrating tooth, which are not combined to automatically obtain the greatest force of penetration possible.
  • the invention proposes a new hydraulic control device which automatically combines into a single control the control of movement of the bucket and that of the actuation of the vibrating tooth or teeth.
  • the invention therefore has for its subject a device for hydraulically controlling a bucket for public works machines provided with at least one movable tooth coupled to a hydraulic hammer and comprising at least one hydraulic double-action jack coupled between the bucket and the structural element on which said bucket is mounted to oscillate.
  • the feed conduits and the delivery conduits of the jack and hydraulic hammers coupled respectively to the bucket and to each of the movable teeth are respectively connected in parallel.
  • a non-return valve is advantageously arranged on the delivery conduit of each of the hydraulic hammers and enables the fluid to escape from the chambers of said hydraulic hammers connected to said delivery conduits.
  • a single non-return valve is preferably provided in the delivery circuit of the hydraulic hammers and is arranged on the common part of the delivery conduits of said hammers.
  • Two variant embodiments are also advantageous, one consisting in that at least one hydraulic hammer is coupled to each movable tooth, the other in that on the contrary there is only one hydraulic hammer coupled to the movable teeth.
  • the feed of the double-action jack coupled with the bucket by the feed conduit corresponds to the penetration phase of said bucket into the material to be displaced.
  • FIG. 1 is an elevational view with part section of a bucket provided with a vibrating tooth actuated by a device according to the invention
  • FIGS. 2 and 3 are schematic views of two variants of a control device according to the invention.
  • FIG. 1 shows a bucket 1 mounted to oscillate at the end of the balance beam 2 of a public works machine about an axis 3.
  • a double action jack 4 is coupled between the balance beam 2 and a connection assembly 5, of the rocking lever type for example, this assembly itself being coupled to the bucket 1 for controlling its movement.
  • the bucket 1 itself is noteworthy in that it comprises a double base constituted by an inner base 6 and by an outer base 7 between which a cavity is made. At least one tooth 8 is mounted to slide in the cavity and opens into the front face of the bucket 1. A stop 9, unitary with the bucket 1, may cooperate with a shoulder of the tooth 8 in order to ensure its connection with said bucket 1.
  • a hydraulic hammer l0 opposite the tooth 8 which is made unitary with the bucket 1 by a fixing means 11.
  • teeth 8 are generally mounted on the same bucket.
  • each of them is actuated by at least one hydraulic hammer, similar to hammer 10.
  • Each hammer is referenced 10a, 10b, 100, as in FIG. 2.
  • the different teeth 8 are actuated by a'single hammer.
  • a feed conduit such as conduits 12a, 12b, 12c relative to the hammers 10a, 10b, 10c, and through a delivery conduit 13a, 13b, 130.
  • the jack 4 is connected to the pressurized fluid feed circuit by a feed conduit 14 and by a delivery conduit 15, and said conduits 14 and 15 may moreover be selectively placed in communication with a source of pressurized fluid and with a discharge tank.
  • the feed conduit 14 is in fact so named because, when it is placed in communication with the pressurized fluid source, the bucket 1 is actuated in the direction of its penetration into the material to be displaced. In the present case of a back-acter bucket, this latter is actuated in the direction of the extension of the jack 4 or of the powerful abutment of the tooth 8 in the material.
  • the delivery conduits 13a, 13b, 13c are connected to a single conduit 16, which in fact is the common part of said conduits.
  • the delivery conduit. 15 of the jack 4 is itself connected to the conduit 16, downstream of the connections of the conduits 13a, 13b, 13c, whilst a non-return valve 17 is arranged on the conduit 16 between the connections of the conduits 13a, 13b, 13c to said conduit 16 and the connection of the conduit 15 to conduit 16.
  • the non-return valve 17 enables the fluid escaping from the hydraulic hammers 10a, 10b, 10c, through conduits 13a, 13b, 130, to return to the discharge tank, when the conduits 12a, 12b, 12c and conduit 14, which are connected in parallel to a single conduit 18, are placed in communication with the source of pressurized fluid by connection of said conduit 18 with said source.
  • the nonreturn valve 17 isolates the conduits 13a, 13b, 130 from the pressurized fluid feed.
  • a variant according to the invention consists in arranging a non-return valve 17a, 17b, 17c on each of the conduits 13a, 13b, 130 (FIG. 3), by eliminating the preceding valve 17.
  • the feed circuit of the hydraulic hammers is designed so that the teeth 8 are actuated by said hammers 10a, 10b, 10c, when the feed conduits 1201, 1211, are placed in communication with the source of pressurized fluid by means of the conduit 18.
  • the conduits 16 and 18 may be placed in selective communication with the source of pressurized fluid and with the discharge tank by means of a single control, for example a slide valve.
  • conduit 18 When the bucket 1 is actuated during a penetration phase, the conduit 18 is placed in communication with the source of pressurized fluid.
  • the pressurized fluid is therefore sent concomittantly into conduit 14, this having for its effect to bring the bucket 1 into abutment on the material to be displaced with contact of the teeth 8 on the material and to tend to dig out the material, and into conduits 12a, 12b, 12c, this having for its effect to actuate the teeth 8 and to facilitate their penetration and that of the whole bucket 1 into the material.
  • the fluid escaping from jack 4 through conduit 15 and from the hydraulic hammers a, 10b, 10c through conduits 13a, 13b, 13c returns to the discharge tank through conduit 16.
  • conduit 18 in communication with the source of pressurized fluid, but is not yet in contact with the material and if the teeth 8 are therefore directed downwards, the hammers 10a, 10b, 100 are always actuated, but no longer reach the teeth 8 which have come out completely.
  • This arrangement is advantageous, as it limits the periods of shocks of the hammers on the teeth to the periods of penetration only.
  • the bucket 1 When the conduit 16 is finally connected with the source of pressurized fluid, and the conduit 18 with the discharge tank, the bucket 1 is maneuvered in reverse direction by isolating, by the non-return valve 17 or by the valves 17a, 17b, 170, the hammers 10a, 10b, 10c, from the pressurized fluid feed, thus by actuating none of said hammers, this being advantageous since the bucket l is then in discharge phase for example and not in penetration phase.
  • the hydraulic control device increases very substantially the performances of a given machine, the power of the machine remaining practically unchanged or having to be only very slightly increased, since the penetration is obtained by shocks of the hydraulic hammers on the teeth.
  • an hydraulic bucket comprising a bucket pivotally mounted to a structural member, and at least one double-action hydraulic jack coupled between said bucket and said structural member to pivot said bucket, the improvement which comprises:
  • feed conduit means connecting in parallel said jack and hammer to provide hydraulic fluid thereto;
  • delivery conduit means connecting in parallel said hammer and said jack for return of said hydraulic fluid; and non-return valve means positioned on said delivery conduit means downstream of said hammer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Earth Drilling (AREA)
  • Shovels (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Fluid-Pressure Circuits (AREA)
US74568A 1969-09-29 1970-09-23 Hydraulic control for hydraulic bucket having reciprocating teeth Expired - Lifetime US3677604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6933171A FR2058834A5 (enrdf_load_stackoverflow) 1969-09-29 1969-09-29

Publications (1)

Publication Number Publication Date
US3677604A true US3677604A (en) 1972-07-18

Family

ID=9040761

Family Applications (1)

Application Number Title Priority Date Filing Date
US74568A Expired - Lifetime US3677604A (en) 1969-09-29 1970-09-23 Hydraulic control for hydraulic bucket having reciprocating teeth

Country Status (6)

Country Link
US (1) US3677604A (enrdf_load_stackoverflow)
JP (1) JPS497243B1 (enrdf_load_stackoverflow)
DE (1) DE2044059C3 (enrdf_load_stackoverflow)
ES (1) ES383484A1 (enrdf_load_stackoverflow)
FR (1) FR2058834A5 (enrdf_load_stackoverflow)
GB (1) GB1291318A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937162A (en) * 1972-04-12 1976-02-10 Kobe Steel Ltd. Device for use in demolishing a consolidated and hardened slurry body remaining in the hold of an iron-ore carrier
US4625438A (en) * 1985-09-20 1986-12-02 Mozer Daniel S Excavating bucket having power driven, individually controlled digging teeth
US4663868A (en) * 1984-07-21 1987-05-12 Mannesmann Ag Scoop wheel having oscillating impact cutters
US4848844A (en) * 1986-07-25 1989-07-18 Mannesmann Aktiengesellschaft Overburden excavator
WO1990000106A1 (en) * 1988-06-30 1990-01-11 Caterpillar Inc. Synchronized hydraulic hammer arrangement
US5787786A (en) * 1996-05-09 1998-08-04 Sauer-Sundstrand - Control Concepts Dual hydraulic oscillator for the reciprocating cutter of an agricultural machine
US6253470B1 (en) * 1997-02-21 2001-07-03 Douglas Dynamics Hydraulic and electrical control systems for use with vehicle accessory units
US6467199B1 (en) 1999-07-30 2002-10-22 M. J. Electric, Inc. Hand-control for V-plows
US20080201994A1 (en) * 2007-01-17 2008-08-28 Muncie Power Products, Inc. Electrohydraulic control system for a vehicle
US20080313934A1 (en) * 2007-06-19 2008-12-25 Doug Smoljo Earthworking implement
US11492776B1 (en) * 2020-03-17 2022-11-08 Ralph Antonelli Excavator bucket with retractable teeth

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8330052D0 (en) * 1983-11-10 1983-12-14 Priestman Bros Ltd Excavator bucket and knuckle assembly
GB2435653C (en) 2006-03-01 2019-03-20 John Thomas Gareth Excavator
ITCS20070020A1 (it) * 2007-04-21 2008-10-22 Evangelista Russo Dispositivo per benna di macchine movimento terra

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1464486A (en) * 1914-06-17 1923-08-07 Sullivan Machinery Co Drilling apparatus
US2228445A (en) * 1938-10-12 1941-01-14 Velbiss Charles Dudley De Excavating bucket
US2423787A (en) * 1944-11-01 1947-07-08 Aluminum Co Of America Crust breaking apparatus
US2606013A (en) * 1949-11-02 1952-08-05 Jr Bruce O Acker Excavating apparatus
US3065557A (en) * 1960-07-01 1962-11-27 Albritton Engineering Corp Power excavating device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1464486A (en) * 1914-06-17 1923-08-07 Sullivan Machinery Co Drilling apparatus
US2228445A (en) * 1938-10-12 1941-01-14 Velbiss Charles Dudley De Excavating bucket
US2423787A (en) * 1944-11-01 1947-07-08 Aluminum Co Of America Crust breaking apparatus
US2606013A (en) * 1949-11-02 1952-08-05 Jr Bruce O Acker Excavating apparatus
US3065557A (en) * 1960-07-01 1962-11-27 Albritton Engineering Corp Power excavating device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937162A (en) * 1972-04-12 1976-02-10 Kobe Steel Ltd. Device for use in demolishing a consolidated and hardened slurry body remaining in the hold of an iron-ore carrier
US4663868A (en) * 1984-07-21 1987-05-12 Mannesmann Ag Scoop wheel having oscillating impact cutters
US4625438A (en) * 1985-09-20 1986-12-02 Mozer Daniel S Excavating bucket having power driven, individually controlled digging teeth
US4848844A (en) * 1986-07-25 1989-07-18 Mannesmann Aktiengesellschaft Overburden excavator
WO1990000106A1 (en) * 1988-06-30 1990-01-11 Caterpillar Inc. Synchronized hydraulic hammer arrangement
US5787786A (en) * 1996-05-09 1998-08-04 Sauer-Sundstrand - Control Concepts Dual hydraulic oscillator for the reciprocating cutter of an agricultural machine
US6253470B1 (en) * 1997-02-21 2001-07-03 Douglas Dynamics Hydraulic and electrical control systems for use with vehicle accessory units
US6467199B1 (en) 1999-07-30 2002-10-22 M. J. Electric, Inc. Hand-control for V-plows
US20080201994A1 (en) * 2007-01-17 2008-08-28 Muncie Power Products, Inc. Electrohydraulic control system for a vehicle
US20080313934A1 (en) * 2007-06-19 2008-12-25 Doug Smoljo Earthworking implement
US7891121B2 (en) * 2007-06-19 2011-02-22 Doug Smoljo Earthworking implement
US11492776B1 (en) * 2020-03-17 2022-11-08 Ralph Antonelli Excavator bucket with retractable teeth

Also Published As

Publication number Publication date
DE2044059C3 (de) 1980-09-11
DE2044059B2 (de) 1980-01-17
JPS497243B1 (enrdf_load_stackoverflow) 1974-02-19
GB1291318A (en) 1972-10-04
ES383484A1 (es) 1973-03-01
DE2044059A1 (de) 1971-06-09
FR2058834A5 (enrdf_load_stackoverflow) 1971-05-28

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