NL2014748B1 - Cutter head with a replaceable adapter. - Google Patents

Cutter head with a replaceable adapter. Download PDF

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Publication number
NL2014748B1
NL2014748B1 NL2014748A NL2014748A NL2014748B1 NL 2014748 B1 NL2014748 B1 NL 2014748B1 NL 2014748 A NL2014748 A NL 2014748A NL 2014748 A NL2014748 A NL 2014748A NL 2014748 B1 NL2014748 B1 NL 2014748B1
Authority
NL
Netherlands
Prior art keywords
tool
recess
blade
head
cutting head
Prior art date
Application number
NL2014748A
Other languages
Dutch (nl)
Other versions
NL2014748A (en
Inventor
Geert Wijma Klaas
Martinus Petrus Wempe Cornelis
Bahramian Paul
Original Assignee
Leo Dynamische Investering B V
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 Leo Dynamische Investering B V filed Critical Leo Dynamische Investering B V
Priority to NL2014748A priority Critical patent/NL2014748B1/en
Priority to EP16733735.1A priority patent/EP3289144A1/en
Priority to PCT/NL2016/050300 priority patent/WO2016178562A1/en
Publication of NL2014748A publication Critical patent/NL2014748A/en
Application granted granted Critical
Publication of NL2014748B1 publication Critical patent/NL2014748B1/en

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Classifications

    • 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
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements
    • 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
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2825—Mountings therefor using adapters
    • 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
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2833—Retaining means, e.g. pins
    • E02F9/2841—Retaining means, e.g. pins resilient

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Milling Processes (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

The invention relates to a cutter head (1) for an excavating device comprising a blade (10-10"). The blade has a recess (12-12") and around the recess an axial supporting surface (19, 19'). A tool holder (13-13 ") carrying a tool (14-14") has a holder shaft (15) that is seated in the recess (12-12"). A transverse head (16) of the tool holder engages with the axial supporting surface (19, 19'). The tool holder is attached to the blade via a clamping device (20) attached to the blade (10-10") at or near the axial supporting surface (19,19') and clampingly engages with the transverse head (16) to press the contact surface ( 18, 18') of the transverse head ( 16) against the axial supporting surface (19, 19'). The shaft (15) is pressed against radial liners (31,31 ') and via a bush (33) against a lower end (32) of the recess (12), which may be tapered.

Description

Cutter head with a replaceable adapter Field of the invention
The invention relates to a cutter head for an excavating device comprising at least one blade with a recess, the blade comprising around the recess an a axial supporting surface, a tool holder and a tool, the tool holder engaging with the tool and having a holder shaft that is seated in the recess and a transverse head having a contact surface engaging with the axial supporting surface, the tool holder being removably attached to the blade via a connector member.
The invention also relates to a blade, a tool holder and a tool for use in such a cutter head.
Background of the invention
Such a cutter head is known from W02013/180615, in which a cutter head for a dredger is described having tool holders, or “adapters” carrying the teeth that can be easily released from the cutter head blades via a bolted connection of the lower end of the holder shaft. The bolted connection is accessible via an opening in the blades and needs to be disconnected and re-attached via a purpose-built tool.
The connection of the known adapters has as a disadvantage that fastening and unfastening of the adapters through the hole in the blades in difficult in view of the confined space and requires a dedicated hydraulic tool. Furthermore, the presence of a hole in the blades was found to weaken the strength of the blades.
Moreover, the bottom part of the known holder shaft was found to be subject to substantial wear due to the flexing of the adapters caused by high forces on the tools (teeth) when the cutter head is in operation. This flexing causes micro-movements between the different parts that in combination with water/sand mixtures result in accelerated wear.
It is therefore an object of the present invention to provide a cutter head having an adapter carrying the tool, which adapter, or tool holder, can be easily exchanged.
It is furthermore an object of the invention to provide a cutter head having improved strength.
It is also an object of the invention to provide a cutter head and an adapter that are subject to reduced wear.
Summary of the invention
Hereto the cutter head according to the invention is characterized in that the connector member comprises a clamping device that is fixedly attached to the blade at or near the axial supporting surface and clampingly engages with the transverse head such as to press the contact surface of the transverse head against the axial supporting surface.
Because the transverse head of the adapter according to the invention is clamped against the axial supporting surface of the blade near and inside the receiving cavity, the adapter is easily accessible for exchange, without requiring a hole in the blade. Hereby the strength of the blades is improved.
Furthermore, the clamping fastening at the top end of the adapter prevents micro movements of the shaft and hence reduces wear.
In a preferred embodiment of a cutter head according to the invention, the clamping device comprises a spring member pressing the contact surface of the transverse head against the axial supporting surface. In this manner a close and play-free contact between the adapter and the blade can be achieved. The clamping member may comprise an angled abutment surface and at least one spring-biased bolt, the transverse head comprising a complementary abutment surface, and at least one hole for receiving the spring-biased bolt.
The holder shaft may at a lower end be received with play in a bush that engages with its outer surface substantially without play with a lower part of the recess, no axial passage for access to the bush being provided in the blade. The reaction forces on the lower end of the holder shaft (the adapter) are now transferred to the blade through the bush-shaped liner. The shape of the bush is smooth and can be concave or convex and can have a circular, oval, rectangular triangular, or polygonal cross-section. The same applies to the cross-section of the holder shaft.
An axial liner may be provided between the axial supporting surface of the blade and the contact surface of the transverse head. The liner may be formed of a relatively wear resistant metal such as HARDOX® and is replaced upon wear. A liner may be provided in the recess near the clamping device.
In an embodiment of a cutter head according to the invention, the transverse head has a front lateral groove and a transverse groove, substantially transversely thereto that is near the clamping member provided with a tensioning device for releasably engaging with a middle part of the tool and pulling it in a rearward direction toward the clamping device such that a front transverse part of the tool engages with the front lateral groove. Via the tensioning device, the tools - such as teeth - can be easily connected and disconnected from the tool holder. Alternative tools may be used in combination with the inventive adapter, such as for instance teeth having a T-shaped cross-section but also other shaped cross-sections and comprising different materials depending on the material that is to be excavated.
The liner may be provided with an axial recess, the transverse head comprising an axially extending part that is received in the recess. In this manner axial rotation of the tool holder is prevented and wear is further reduced.
Brief description of the drawings
Some embodiments of a cutter head according to the invention will, by way of nonlimiting example, be explained in detail with reference to the accompanying drawings. In the drawings:
Fig. 1 shows a perspective view of a cutter head comprising easily releasable tool holders according to the invention,
Fig. 2. shows a partly cut-away view of a blade carrying a tool holder according to the invention,
Fig. 3 shows a cross-sectional view through the tool holder of fig. 2 and
Fig. 4 shows an exploded view of the clamping device and liners according to the invention.
Detailed description of the invention
In fig. 1 a cutter head 1 is shown for an excavating device, in this case a dredger. The cutter head 1 comprises a base ring 2 and a central hub 3 between which a number of blades 10,10’, 10” extend in a spiral-shaped form. Each blade 10-10” has a spine 11 and an edge surface 8 having multiple recesses 12,12’,12’ therein that extend into the blade in a direction perpendicular to the edge surface 8 and more or less parallel to the spine 11. Within each recess 12-12” a tool holder 13,13’, 13” is releasably received. The tool holders 13-13” each carry a tool, in this case a tooth 14,14’, 14”. The tools can have different shapes and hardness, depending on the environment and soil type with which they come into contact. The teeth 14-14” can be released from the tool holders 13-13” while the tool holders remain attached to the blades 10-10” via the recesses 12-12”. The rate of wear of the teeth 14-14”, and consequently the frequency of replacement, is higher than that of the tool holders 13-13” by for instance a factor 10.
Each tool holder 13 has a holder shaft 15 and a transverse head 16. The transverse heads 16 are provided with a transverse groove 17 in which the tooth 14 is received.
As can be seen from fig. 2, the transverse head 16 has a contact surface 18,18’ that rests on an axial supporting surface 19, 19’ of the blade 10, near the recess 12. A clamping device 20 is formed by a connector member 21 that is welded onto the blade 10. The connector member 21 has an angled abutment surface 22 against which a complementary surface 23 on the transverse head 16 is supported. Two spring-loaded bolts 24,25, each carrying a spring 26, 27, extend through aligned holes on the surfaces 22, 23 and clamp the transverse head 16 with its contact surfaces 18,18’ against the axial supporting surfaces 19,19’ of the blade 10, substantially without play, via an intermediate axial liner 30. By action of the clamping device 20, the holder shaft 15 is furthermore pressed into contact with radial liners 31,31’ that are provided inside the recess 12, and at a lower end 32 of the shaft 15, a bush 33 is pressed against the inside of the lower end of the recess 12. The recess 12 has a downwardly tapering shape.
As can be seen from fig. 3, the lower end 32 of the tool holder shaft 15 is received with play inside the bush 33, which may be smooth, concave or convex. The outside surface 34 of the bush 33 is pressed into contact with the inner surface of the recess 12. In order to prevent rotation of the tool holder 13, the transverse head 16 is provided with an axially extending part 35 that fits into a recess 36 in the axial liner 30, as can best be seen in fig. 4.
The tooth 14 that is shown in this embodiment, is provided with a front lateral part 40 that fits into a front lateral groove 41 in the transverse head 16. A central part 46 of the tooth extends in the transverse groove 17 in the head 16 and is at a rear end 42, near the clamping device 20, provided with a hook member 43. A complementary hook member 44 attached to the transverse head 16 via bolt connection 45 releasably pulls the tooth 14 with its front lateral 40 against the front lateral groove 41.

Claims (11)

1. Snijkop (1) voor een graafinrichting omvattende ten minste een blad (10-10”) met een uitsparing (12-12”), waarbij het blad omvat om de uitsparing een axiaal draagoppervlak (19, 19’), een gereedschaphouder (13-13”) en een gereedschap (14-14”), waarbij de gereedschaphouder het gereedschap aangrijpt en een houderas (15) heeft, die aangebracht is in de uitsparing (12-12”) en een dwarskop (16) met een raakoppervlak (18, 18’) dat het axiale draagoppervlak (19, 19’) aangrijpt, waarbij de gereedschaphouder (13, 13”) verwijderbaar bevestigd is aan het blad (10-10”) via een verbindingsorgaan, met het kenmerk, dat het verbindingsorgaan omvat een kleminrichting (20), die vast bevestigd is aan het blad (10-10”) bij of nabij het axiale draagoppervlak (19, 19’) en klemmend de dwarskop (16) aangrijpt teneinde het raakoppervlak (18, 18’) van de dwarskop (16) tegen het axiale draagoppervlak (19, 19’) te drukken.A cutting head (1) for an excavator comprising at least one blade (10-10 ") with a recess (12-12"), the blade comprising an axial bearing surface (19, 19 ') around a recess, a tool holder ( 13-13 ") and a tool (14-14"), the tool holder engaging the tool and having a holder shaft (15) arranged in the recess (12-12 ") and a crosshead (16) with a tangent surface (18, 18 ') which engages the axial bearing surface (19, 19'), the tool holder (13, 13 ") being removably attached to the blade (10-10") via a connecting member, characterized in that the connecting member includes a clamping device (20) fixedly attached to the blade (10-10 ") at or near the axial bearing surface (19, 19 ') and clampingly engaging the transverse head (16) to engage the contact surface (18, 18') pressing the cross head (16) against the axial bearing surface (19, 19 '). 2. Snijkop (1) volgens conclusie 1, waarbij de kleminrichting (20) omvat een veerorgaan (24, 25, 26, 27) dat het raakoppervlak (18, 18’) van de dwarskop (16) tegen het axiale draagoppervlak (19, 19’) drukt.2. Cutting head (1) according to claim 1, wherein the clamping device (20) comprises a spring member (24, 25, 26, 27) that the contact surface (18, 18 ') of the cross head (16) against the axial bearing surface (19, 19 '). 3. Snijkop (1) volgens conclusie 1 of 2, waarbij de houderas (15) bij een benedeneinde (32) met speling ontvangen wordt in een bus (33), die met een uitwendig oppervlak (34) in hoofdzaak zonder speling een benedendeel van de uitsparing (12-12”) aangrijpt, waarbij geen axiale doorgang die toegang geeft tot de bus in het blad (10-10”) aanwezig is.3. Cutting head (1) according to claim 1 or 2, wherein the holder shaft (15) is received at a lower end (32) with play in a bushing (33) which, with an outer surface (34), substantially without play, forms a lower part of engages the recess (12-12 "), with no axial passage giving access to the bush in the blade (10-10"). 4. Snijkop (1) volgens conclusie 1, 2 of 3, waarbij een axiale voering (30) aanwezig is tussen het axiale draagoppervlak (19, 19’) van het blad (10-10”) en het raakoppervlak (18-18’) van de dwarskop (16). Snijkop (1) volgens een van de voorgaande conclusies, waarbij een radiale voering (31-31”) aanwezig is in de uitsparing (12-12”) nabij de kleminrichting.Cutting head (1) according to claim 1, 2 or 3, wherein an axial lining (30) is present between the axial bearing surface (19, 19 ') of the blade (10-10 ") and the tangent surface (18-18') ) of the crosshead (16). Cutting head (1) according to one of the preceding claims, wherein a radial lining (31-31 ") is present in the recess (12-12") near the clamping device. 6. Snijkop (1) volgens een van de voorgaande conclusies, waarbij de dwarskop (16) een voorste laterale groef (41) heeft en een dwarsgroef (17) in hoofdzaak dwars ten opzichte daarvan, en nabij de kleminrichting (20) voorzien is van een spanorgaan (44, 45) voor het losneembaar aangrijpen van een middendeel (43, 46) van het gereedschap (14) en het trekken van het gereedschap naar achteren naar de kleminrichting (20) zodat een voorste dwarsdeel (40) van het gereedschap de voorste laterale groef (41) aangrijpt.Cutting head (1) according to one of the preceding claims, wherein the cross head (16) has a front lateral groove (41) and a transverse groove (17) substantially transverse to it, and is provided near the clamping device (20). a tensioning member (44, 45) for releasably engaging a center portion (43, 46) of the tool (14) and pulling the tool backward to the clamping device (20) so that a front transverse portion (40) of the tool front lateral groove (41). 7. Snijkop (1) volgens conclusies 4 en 6, waarbij de axiale voering (30) voorzien is van een axiale uitsparing (36), waarbij de dwarskop (16) een zich axiaal uitstrekkend deel (35) omvat dat in de uitsparing (36) opgenomen is.The cutting head (1) according to claims 4 and 6, wherein the axial lining (30) is provided with an axial recess (36), the transverse head (16) comprising an axially extending part (35) which is in the recess (36) ) is included. 8. Snijkop (1) volgens een van de voorgaande conclusies, waarbij de kleminrichting (20) een onder een hoek liggend aanligoppervlak (22) omvat, ten minste een gat met daarin een veerbelaste pen (24, 25, 26, 27), waarbij de dwarskop (16) een complementair aanligoppervlak (23) omvat en ten minste een gat voor het ontvangen van de veerbelaste pen (24, 25, 26, 27).Cutting head (1) according to one of the preceding claims, wherein the clamping device (20) comprises an angled abutment surface (22), at least one hole with a spring-loaded pin (24, 25, 26, 27) therein, the transverse head (16) comprises a complementary abutment surface (23) and at least one hole for receiving the spring-loaded pin (24, 25, 26, 27). 9. Blad (10-10”) voor gebruik in een snijkop (1) volgens een van de voorgaande conclusies omvattende een uitsparing (12-12”), om de uitsparing een axiaal draagoppervlak (19, 19’) en een kleminrichting (20) die vast bevestigd is aan het blad bij of nabij het axiale draagoppervlak (19, 19’).9. Blade (10-10 ") for use in a cutting head (1) according to one of the preceding claims, comprising a recess (12-12"), an axial bearing surface (19, 19 ') and a clamping device (20) around the recess ) fixedly attached to the blade at or near the axial support surface (19, 19 '). 10. Gereedschaphouder (13-13”) voor gebruik in een snijkop (1) volgens een van de conclusies 1-8, omvattende een houderas (15), een dwarskop (16) met een raakoppervlak (18, 18’) en een klemoppervlak (23) in hoofdzaak georiënteerd ten opzichte van het raakoppervlak (18, 18’) met ten minste een gat voor het ontvangen van een pen.Tool holder (13-13 ”) for use in a cutting head (1) according to one of claims 1-8, comprising a holder shaft (15), a cross head (16) with a tangent surface (18, 18 ') and a clamping surface (23) oriented substantially with respect to the tangent surface (18, 18 ') with at least one hole for receiving a pin. 11. Gereedschaphouder (13-13”) volgens conclusie 10, omvattende een houderas (15) zich dwars ten opzichte van het raakoppervlak (18, 18’) uitstrekkend, waarbij de as bij een benedeneinde (32) met speling een bus (33) draagt.A tool holder (13-13 ”) according to claim 10, comprising a holder shaft (15) extending transversely to the contact surface (18, 18 '), the shaft at a lower end (32) having a bushing (33) wear. 12. Gereedschap (14-14”) voor gebruik in een snij kop (1) volgens een van de conclusies 1-8, omvattende een centraal gereedschaplichaam (46) met een zich naar voren uitstrekkende gereedschaprand, een dwars gereedschapdeel (40), dat zich dwars ten opzichte van de zich naar voren uitstrekkend gereedschaprand uitstrekt en een spanverbindingsorgaan (43) op het centrale gereedschaplichaam (46) aan een zijde tegenover de zich naar voren uitstrekkende gereedschaprand.A tool (14-14 ") for use in a cutting head (1) according to any of claims 1-8, comprising a central tool body (46) with a forwardly extending tool edge, a transverse tool part (40), extending transversely to the forwardly extending tool edge and a clamping connector (43) on the central tool body (46) on a side opposite the forwardly extending tool edge.
NL2014748A 2015-05-01 2015-05-01 Cutter head with a replaceable adapter. NL2014748B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL2014748A NL2014748B1 (en) 2015-05-01 2015-05-01 Cutter head with a replaceable adapter.
EP16733735.1A EP3289144A1 (en) 2015-05-01 2016-04-28 Cutter head with a replaceable adapter
PCT/NL2016/050300 WO2016178562A1 (en) 2015-05-01 2016-04-28 Cutter head with a replaceable adapter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2014748A NL2014748B1 (en) 2015-05-01 2015-05-01 Cutter head with a replaceable adapter.

Publications (2)

Publication Number Publication Date
NL2014748A NL2014748A (en) 2016-11-07
NL2014748B1 true NL2014748B1 (en) 2017-01-25

Family

ID=53540799

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2014748A NL2014748B1 (en) 2015-05-01 2015-05-01 Cutter head with a replaceable adapter.

Country Status (3)

Country Link
EP (1) EP3289144A1 (en)
NL (1) NL2014748B1 (en)
WO (1) WO2016178562A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29822369U1 (en) * 1998-12-16 1999-03-18 Wagener, Helmut, 53577 Neustadt Device for holding a tool
DE10221764C1 (en) * 2002-05-15 2003-11-27 Wirtgen Gmbh Holder for shaft chisel in milling machine has upper part with seating for shaft chisel secured to base part with clamp screw and clamp element for securing chisel shaft
SE538940C2 (en) * 2012-05-30 2017-02-28 Combi Wear Parts Ab Tools and tool holders for dredgers

Also Published As

Publication number Publication date
WO2016178562A1 (en) 2016-11-10
NL2014748A (en) 2016-11-07
EP3289144A1 (en) 2018-03-07

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