EP2336488B1 - Meisselhalter und basisteil - Google Patents

Meisselhalter und basisteil Download PDF

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Publication number
EP2336488B1
EP2336488B1 EP10188978.0A EP10188978A EP2336488B1 EP 2336488 B1 EP2336488 B1 EP 2336488B1 EP 10188978 A EP10188978 A EP 10188978A EP 2336488 B1 EP2336488 B1 EP 2336488B1
Authority
EP
European Patent Office
Prior art keywords
plug
attachment
support
receptacle
feed direction
Prior art date
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.)
Active
Application number
EP10188978.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2336488A3 (de
EP2336488A2 (de
Inventor
Cyrus Barimani
Karsten Buhr
Thomas Lehnert
Guenter Haehn
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.)
Wirtgen GmbH
Original Assignee
Wirtgen GmbH
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 Wirtgen GmbH filed Critical Wirtgen GmbH
Publication of EP2336488A2 publication Critical patent/EP2336488A2/de
Publication of EP2336488A3 publication Critical patent/EP2336488A3/de
Application granted granted Critical
Publication of EP2336488B1 publication Critical patent/EP2336488B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/19—Means for fixing picks or holders
    • E21C35/193—Means for fixing picks or holders using bolts as main fixing elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/186—Tools therefor, e.g. having exchangeable cutter bits
    • B28D1/188—Tools therefor, e.g. having exchangeable cutter bits with exchangeable cutter bits or cutter segments
    • 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
    • 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
    • E02F9/2858—Teeth characterised by shape
    • 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
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/19—Means for fixing picks or holders
    • E21C35/191—Means for fixing picks or holders for fixing holders
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C47/00—Machines for obtaining or the removal of materials in open-pit mines
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C47/00—Machines for obtaining or the removal of materials in open-pit mines
    • E21C47/02—Machines for obtaining or the removal of materials in open-pit mines for coal, brown coal, or the like

Definitions

  • the invention relates to a bit holder with a plug projection and a holding lug, wherein the holding lug has a chisel receptacle, and wherein the holding lug projecting in the tool feed direction at least partially from or over the plug approach.
  • the invention also relates to a base part with a plug-in receptacle and a support lug, which forms a support.
  • Such bases are used to hold chisel holders.
  • the base part has a plug-in receptacle, to the front side a base part section is connected with a threaded receptacle.
  • the threaded receptacle opens into the socket.
  • the bit holder is equipped with a plug-in projection, which can be inserted into the socket of the base part.
  • a Holding attachment connected, which is provided with a bit holder in the form of a through hole. The holding approach is partially in the tool feed direction on the plug approach. Contrary to the feed direction both the retaining lug and the plug-in approach are provided with support surfaces.
  • a screw is screwed into the threaded receptacle of the base part. This presses the chisel holder with its support surfaces to correspondingly shaped mating surfaces of the base part.
  • a force acts on the bit which is inserted in the bit holder. This arises when the bit engages in the material to be removed. In this case, the force direction varies during the tool attack, whereby in particular an alternating stress arises. It has been found that in such tool combinations, due to the alternating stress, the fastening screw can be solved, whereby the bit holder is no longer securely fixed in the base part.
  • such bit holder for mining work with high tool delivery, as required for example in surface mining, not sufficiently dimensioned. In particular, often results in the transition region between the holding lug and the plug approach tool breakage.
  • Dovetail connections between the base part and the bit holder are also known from the prior art. Such a configuration is for example in the US 4,915,455 shown. These dovetail joints are very vulnerable. As a result of the alternating stress, the mating surfaces between the base part and the bit holder knock out, resulting in premature failure of the system.
  • the task concerning the bit holder is achieved by a bit holder according to claim 1 and by a bit holder according to claim 2.
  • the holding approach in this case has a support section with a support surface, which is arranged in the feed direction at least partially in front of the insertion approach.
  • the projecting in the direction of the part of the holding lug can be intercepted with its rigid, molded support surface on a correspondingly shaped abutment of a base part.
  • the location of the transmission of the maximum forces occurring during the use of tools is placed close to the chisel head. This results in a significant reduction in the effective torques.
  • This strength-optimized design of the chisel holder leads to significantly longer service life and increases operational safety.
  • the support portion has two support surfaces which are at an angle to each other. In this way, a centered and backlash-free alignment of the chisel holder on corresponding mating surfaces of a base part arises. This arrangement can withstand high loads even when acting transversely to the main direction.
  • the support surfaces are arranged on both sides of the median longitudinal plane extending through the central longitudinal axis of the bit receptacle and in the direction of the longitudinal extent of the insertion projection.
  • the support surface or the support surfaces form a sliding guide whose sliding direction runs counter to the tool feed direction (v).
  • v tool feed direction
  • the support surface or the support surfaces is part of a broadening (projecting) in the direction transverse to the central longitudinal axis of the bit holder on the bit holder.
  • the spacers form Spanableit vom that protect a base part from abrasive wear attack.
  • a conceivable alternative of the invention may be such that the plug-in projection has at least one pressure surface in the area of its plug-in front in the tool feed direction, which is arranged at an angle of less than 90 °, preferably less than 80 °, to the central longitudinal axis of the plug-in extension.
  • This pressure surface serves to clamp the chisel holder with a base part.
  • Einzug can be introduced in the direction of the longitudinal axis of the plug-in projection on the pressure surfaces (for example, with a pressure screw).
  • the insertion projection preferably has a further support section with one or more bearing surfaces in the area of its plug projection rear side facing away from the tool feed direction.
  • bearing surfaces are at an angle to each other, which in turn creates a centering of the chisel holder relative to the base part, as well as an optimized power dissipation by large transmission surfaces for the forces acting.
  • the bearing surfaces extend substantially in the direction of the longitudinal axis of the plug-in projection.
  • a sliding guide is generated in plug-way longitudinal direction. If, due to wear, a base part in the area of its support section assigned to the chisel holder wears on the front side, the usability of the base part for new, unworn chisel holders nevertheless remains maintained. Over the back sliding guide the Nachsetz can be compensated.
  • the basic part of the object of the invention is achieved by a base part according to claim 13.
  • the support forming the support forming shoulder is arranged in the tool feed direction in front of the plug-in receptacle and the support is formed in front of the plug-in receptacle.
  • the base part thus offers the possibility of a power-optimized dissipation of the forces, since the support lug can be brought with its support close to the chisel tip.
  • the support forms a support surface which forms an obtuse angle with the longitudinal axis of the plug attachment.
  • this obtuse angle which should preferably extend in the range between 200 ° and 250 °, an optimized on the varying force direction during the use of tools power transfer is possible.
  • a projection is arranged, which holds in the region of the plug receptacle at least one counter-bearing, so that the above-mentioned double support of a chisel holder is possible.
  • this front side can be clamped to the support lug and the back of the abutment.
  • the support and the abutment on two support surfaces which are at an angle to each other.
  • a centering of the bit holder is achieved with respect to the base part.
  • large power transmission surfaces are possible via the slanted support surfaces.
  • the angle arrangement can be chosen so that with a small volume of construction a strength-optimized design of the base part is possible.
  • a variant of the invention is such that the support projection in the tool feed direction in front of the plug-in receptacle has a screw receptacle which opens into the region of the plug receptacle.
  • FIG. 1 shows a base member 10 having a bottom 11 with concave top surfaces. By means of this attachment surfaces, the base part can be placed on the cylindrical outer shell of a milling drum and welded firmly. A bit holder 20 is connected to the base part 10.
  • FIG. 3 shows, the base part 10 on a plug-in receptacle 15 which receives a plug 21 of the chisel holder 20.
  • FIGS. 4 to 6 the design of the bit holder 20 explained in more detail.
  • the bit holder 20, the plug approach 21, at the angle of a holding lug 25 is connected.
  • an obtuse angle is included between the plug 21 and the retaining lug 25.
  • the plug-in projection 21 forms in the region of its, in the tool feed direction (v) facing plug approach front 22 a front surface 21.1.
  • two recesses are recessed so that they form pressure surfaces 21.2.
  • the pressure surfaces 21.2 are arranged at an angle to the longitudinal axis of the plug-in projection 21.
  • the pressure surface 21.2 bearing projection of the plug 21 passes through lateral transition sections 21.3 in side surfaces 21.4 over. In this case, the side surfaces 21.4 are aligned in the direction of the tool feed direction (v) and point to the tool sides.
  • FIG. 5 can recognize the side surfaces go 21.4 in the area of the plug projection rear side 23 in bearing surfaces 21.5 over.
  • the storage areas 21.5 are at an angle to each other.
  • the bearing surfaces 21.5 in turn are connected by means of a transition surface 21.6 and have opposite to the feed direction v.
  • the retaining lug 25 is provided with a bit holder 26 in the form of a cylindrical bore.
  • the central longitudinal axis M of the bit receptacle 26 and the longitudinal axis L of the plug-in projection 21 ideally include an angle in the range between 100 ° and 160 °, preferably 130 °.
  • the bit receptacle 26 merges via an introducer extension 27 into a bearing surface 25.3.
  • the support surface 25.3 extends radially to the chisel receiver 26.
  • the chisel holder 26 faces away from the support surface 25.3 in a cross-sectional taper 25.1.
  • the cross-sectional taper 25.1 is designed in the form of a truncated cone and leads the lateral surface (25.2) of the chisel holder 20 into the bearing surface 25.3.
  • the retaining lug 25 has in the region below the bit holder 26 two support surfaces 29, which are employed in an angle to each other in a V-shape. Show how the FIG. 6 can recognize the support surfaces 29 due to their oblique position in the direction of the free end of the plug-in approach and at the same time in the feed direction (v) and run, as in FIG. 3 represented, parallel or substantially parallel to the central longitudinal axis M of the bit holder 26. Like the FIG. 5 can recognize, has the retaining lug 25 lateral widening 28 in which the support surfaces 29 expire. The support surfaces 29 and the bearing surfaces 21.5 are oriented pointing in opposite directions.
  • the base part 10 has a plug-in receptacle 15 which is adapted in its cross-section to the outer contour of the plug-in projection 21 of the bit holder 20. Front side, the plug-in receptacle 15 is limited by means of a support projection 12.
  • a screw 13 is incorporated as a thread.
  • the screw receptacle 13 opens into the plug-in receptacle 15.
  • the plug receptacle 15 faces away from the screw receptacle 13 in a bore enlargement 13.1.
  • the support lug 12 has in its upper, radially outer region on a support 18 which is formed by two support surfaces 18.1.
  • the two support surfaces 18.1 are employed at an angle to each other.
  • the angular orientation of the support surfaces 18.1 is adapted to the orientation of the support surfaces 29 of the chisel holder 20, so that the support surfaces 29 of the chisel holder 20 can rest plane-parallel on the support surfaces 18.1 of the base member 10.
  • the support surfaces 18.1 are for the purpose of the defined investment of the bit holder 20 via a recessed paragraph 18.4 connected to each other.
  • the plug-in receptacle 15 is delimited by an abutment 16.
  • the anvil 16 is part of a rear projection 17 which protrudes counter to the feed direction (v) via the plug-in receptacle 15.
  • the anvil 16 is formed by two further support surfaces 16.1, which are at an angle to each other.
  • these further support surfaces 16.1 are again adapted in their design and spatial arrangement adapted to the bearing surfaces 21.5 of the bit holder 20, so that a plane-parallel contact the other bearing surfaces 21.5 on the support surfaces 16.1 is possible.
  • the plug-in receptacle 15 is bounded by an open space 18.2.
  • the plug-in receptacle 15 is bounded by two lateral connecting sections 19.
  • the inner surfaces formed by the connecting sections 19 and facing the plug-in receptacle 15 pass over open spaces 18.5 into walls 18.6, which in turn are oriented in the tool feed direction (v).
  • the walls 18.6 turn out in the open space 18.2.
  • the mounting of the bit holder 20 on the base part 10 is carried out as follows.
  • the bit holder 20 is inserted with its plug 21 in the socket 15 of the base member 10.
  • the fastening element 14 has a pressure surface oriented at right angles to the screw axis, which abuts the pressure surface 21. 2 of the chisel holder 20.
  • the pressure surface does not have to be a flat surface, but can also be a spherical surface.
  • the FIG. 1 shows that two fastening elements 14 are used for fastening the chisel holder 20, thus also two screw receptacles 13 are incorporated into the base part 10.
  • the fastening element 14 presses against the pressure surface 21.2. Due to the angular position of the pressure surface 21.2 to the central longitudinal axis of the plug 21, the fastener 14 exerts a pull-in force on the plug 21. At the same time a force component is generated, which is opposite to the feed direction (v) and presses the plug 21 in the counter-bearing 16. The extending in the direction of the longitudinal axis of the plug 21 force component brings the support surfaces 18.1 of the support 18 with the support surfaces 29 of the chisel holder 20 to the plant. A tension of the fasteners 14 now causes, as in particular from FIG.
  • the bit holder 20 experiences a support on both sides of the central longitudinal axis of the plug-in projection 21.
  • the support on the anvil 16 is made on the rear side of the central longitudinal axis and on the other on the support 18 on the front side of the central longitudinal axis.
  • the fastening screw 14 now acts on the insertion projection 21 such that a tensioning of the bit holder 20 takes place on the support 18 and the abutment 16. In this way, a secure and captive attachment of the chisel holder 20 is guaranteed.
  • FIG. 3 can further recognize that in the bore extension 13.1 of the screw 13, a cover 14.1 can be used, which covers the tool holder of the fastener 14.
  • Both the base part 10 and the bit holder 20 are formed substantially mirror-symmetrically to the transverse direction of the medium (in the transverse direction) of these respective components. This promotes a uniform load transfer.
  • FIG. 3 can recognize a unique assignment of the bit holder 20 to the base part 10 in particular guaranteed by the fact that only one edition of these two above-mentioned central support points takes place (support 18 and thrust bearing 16).
  • the free space 18.2 the walls 18.6 of the open spaces 18.5 and the connecting portion 19 of the plug 21 is released from the socket 15. If, for example, a wear of the support surfaces 18.1 takes place in the course of the use of the base part 10, the paragraph 18.4 forms a reset space.
  • the spacing of the bit holder 20 from the paragraph 18.4 guarantees a repositioning of the bit holder 20 in case of wear.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Earth Drilling (AREA)
  • Jigs For Machine Tools (AREA)
  • Milling Processes (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP10188978.0A 2009-12-17 2010-10-27 Meisselhalter und basisteil Active EP2336488B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009059188A DE102009059188A1 (de) 2009-12-17 2009-12-17 Meißelhalter und Basisteil

Publications (3)

Publication Number Publication Date
EP2336488A2 EP2336488A2 (de) 2011-06-22
EP2336488A3 EP2336488A3 (de) 2016-06-29
EP2336488B1 true EP2336488B1 (de) 2019-05-15

Family

ID=43825263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10188978.0A Active EP2336488B1 (de) 2009-12-17 2010-10-27 Meisselhalter und basisteil

Country Status (10)

Country Link
US (1) US8746806B2 (ja)
EP (1) EP2336488B1 (ja)
JP (1) JP5425047B2 (ja)
KR (1) KR101388232B1 (ja)
CN (3) CN202081892U (ja)
AU (1) AU2010246502B2 (ja)
CA (1) CA2722823C (ja)
DE (1) DE102009059188A1 (ja)
RU (1) RU2457327C1 (ja)
TW (1) TWI470148B (ja)

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CN102102516A (zh) 2011-06-22
CN202081892U (zh) 2011-12-21
DE102009059188A1 (de) 2011-06-22
CA2722823A1 (en) 2011-06-17
TW201124607A (en) 2011-07-16
CA2722823C (en) 2015-01-13
KR101388232B1 (ko) 2014-04-25
TWI470148B (zh) 2015-01-21
JP2011126002A (ja) 2011-06-30
AU2010246502A1 (en) 2011-07-07
US20110148178A1 (en) 2011-06-23
US8746806B2 (en) 2014-06-10
CN102102516B (zh) 2016-08-31
EP2336488A3 (de) 2016-06-29
AU2010246502B2 (en) 2012-10-25
CN106089199A (zh) 2016-11-09
CN106089199B (zh) 2019-10-01
JP5425047B2 (ja) 2014-02-26
KR20110069719A (ko) 2011-06-23
EP2336488A2 (de) 2011-06-22
RU2457327C1 (ru) 2012-07-27

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