WO2020056153A1 - Retenue de manchon pour ensemble pic coupant - Google Patents

Retenue de manchon pour ensemble pic coupant Download PDF

Info

Publication number
WO2020056153A1
WO2020056153A1 PCT/US2019/050838 US2019050838W WO2020056153A1 WO 2020056153 A1 WO2020056153 A1 WO 2020056153A1 US 2019050838 W US2019050838 W US 2019050838W WO 2020056153 A1 WO2020056153 A1 WO 2020056153A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
block
protrusion
shank
cutting assembly
Prior art date
Application number
PCT/US2019/050838
Other languages
English (en)
Inventor
Christopher G. STEWART
Original Assignee
Joy Global Underground Mining Llc
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 Joy Global Underground Mining Llc filed Critical Joy Global Underground Mining Llc
Priority to AU2019337639A priority Critical patent/AU2019337639A1/en
Priority to PL437282A priority patent/PL437282A1/pl
Priority to CN201980070895.7A priority patent/CN112912570A/zh
Publication of WO2020056153A1 publication Critical patent/WO2020056153A1/fr

Links

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
    • E21C35/19—Means for fixing picks or holders
    • E21C35/197—Means for fixing picks or holders using sleeves, rings or the like, as main fixing elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
    • E21C25/10—Rods; Drums

Definitions

  • the present disclosure relates to bits or picks for cutting rock, and particularly to sleeve retention for a cutting pick assembly.
  • Cutting heads include multiple cutting pick assemblies.
  • each cutting pick assembly includes a holder block coupled to a rotating drum.
  • the holder block includes a slot for receiving a sleeve.
  • the sleeve in turn includes a bore for receiving a pick.
  • a cutting assembly is configured to be coupled to a drum that is rotatable about an axis.
  • the cutting assembly includes a block having a leading surface and an inner surface.
  • the inner surface forms a block bore extending along an axis through the leading surface and at least partially through the block.
  • the cutting assembly includes a sleeve having a sleeve shank with an outer surface, a flange, and a sleeve bore.
  • the sleeve bore extends through the flange and at least partially through the sleeve shank.
  • the sleeve shank is positionable within the block bore.
  • the cutting assembly includes a step positioned on one of the inner surface of the block bore and the outer surface of the sleeve shank.
  • the cutting assembly includes a protrusion positioned on the other of the inner surface of the block bore and the outer surface of the sleeve shank. The protrusion engages the step to maintain the sleeve shank within the block bore.
  • a cutting assembly is configured to be coupled to a drum that is rotatable about an axis.
  • the cutting assembly includes a block having a leading surface and an inner surface. The inner surface forms a block bore extending along an axis through the leading surface and at least partially through the block.
  • the cutting assembly also includes a sleeve having a sleeve shank with an outer surface, a flange, and a sleeve bore extending through the flange and at least partially through the sleeve shank.
  • a cutting assembly is configured to be coupled to a drum that is rotatable about an axis.
  • the cutting assembly includes a block having a leading surface and an inner surface. The inner surface forms a block bore extending along an axis through the leading surface and at least partially through the block.
  • the cutting assembly also includes a sleeve having a sleeve shank with an outer surface, a flange, and a sleeve bore extending through the flange and at least partially through the sleeve shank. The sleeve moves from a first position to a second position relative to the block during installation of the sleeve to the block.
  • An interface between the outer surface of the sleeve shank and the inner surface of the block bore provides a compressive force on the sleeve shank when in the first position. The compressive force is decreased when in the second position.
  • FIG. l is a perspective view of a rock excavating machine.
  • FIG. 2 is a perspective view of a portion of a cutting head of the rock excavating machine of FIG. 1.
  • FIG. 3 is a perspective view of a cutting pick assembly that is coupled to the cutting head of FIG. 2.
  • FIG. 4 is a partial section view of a sleeve and a holder block of the cutting pick assembly of FIG. 3.
  • FIG. 5 is a section view of the sleeve of FIG. 4 viewed along section 5—5.
  • FIG. 6 is a section view of the sleeve and the holder block of FIG. 4 viewed along section 5—5, with the sleeve in a disassembled position.
  • FIG. 7 is a section view of the sleeve and the holder block of FIG. 4 viewed along section 5—5, with the sleeve in an intermediate position.
  • FIG. 8 is a section view of the sleeve and the holder block of FIG. 4 viewed along section 5—5, with the sleeve in another intermediate position engaging a portion of the block in an interference fit.
  • FIG. 9 is a section view of the sleeve and the holder block of FIG. 4 viewed along section 5—5, with the sleeve in a fully inserted position.
  • FIG. 10 is a section view of the sleeve and the holder block according to another embodiment.
  • FIG. 11 is a section view of the sleeve and the holder block according to yet another embodiment.
  • FIG. 1 illustrates a mining machine, such as a continuous miner 10, including a frame 14 that is supported for movement by tracks 18.
  • the continuous miner 10 further includes a boom 22 and a cutter head 26 supported on the boom 22.
  • the frame 14 also includes a gathering head 30 and a conveyor 34 extending from a first or front end of the frame 14 toward a second or rear end of the frame 14.
  • the boom 22 includes an end supporting the cutter head 26, and the boom 22 can pivot (e.g., by a pair of actuators 58) to adjust the position of the cutter head 26.
  • the cutter head 26 is formed as an elongated drum 62 including cutting pick assemblies 66 secured to an outer surface of the drum 62.
  • the outer surface of the drum 62 includes multiple pedestals 68, and each cutting pick assembly 66 is secured to one of the pedestals 68.
  • the drum 62 defines a drum axis 70 (FIG. 1) about which the drum 62 rotates.
  • the cutting pick assemblies 66 can be positioned on the surface of the drum 62 in a predetermined pattern to facilitate efficient rock cutting.
  • each cutting pick assembly 66 includes a pick or bit 74, a sleeve 78, and a holder block 82.
  • the bit 74 includes a first portion 86 having a tip 88 for engaging a mine face to remove material, a second portion or bit shank 90, and a shoulder 94 positioned between the tip 88 and the bit shank 90.
  • the sleeve 78 includes a sleeve shank 106, a flange 110, and a bore 114 (FIG. 4) extending through both the sleeve shank 106 and the flange 110.
  • the flange 110 is positioned adjacent a forward or leading end of the sleeve 78 and includes an abutment surface 118 and a bearing surface 120.
  • the bit shank 90 (FIG. 3) is positioned within the bore 114, and the bit shoulder 94 engages or abuts the abutment surface 118 of the sleeve 78.
  • the bit shank 90 is received in the sleeve bore 114 by a clearance fit and is retained by a clip (not shown). In other embodiments, the bit shank 90 may be press fit within the sleeve bore 114.
  • the sleeve shank 106 includes an outer surface 121 having a sleeve protrusion 122 (e.g., a first portion) positioned adjacent an end of the shank 106 opposite the flange 110, and a recess 126 (e.g., a second portion) positioned between the sleeve protrusion 122 and the flange 110 with respect to an axis 128 of the sleeve bore 114.
  • the sleeve protrusion 122 extends 360-degrees about the axis 128 and has a first outer diameter OD1.
  • the first outer diameter OD1 is constant along the axis 128.
  • the sleeve protrusion 122 can taper along the axis 128 and/or the sleeve protrusion 122 can be discontinuous about the axis 128 (e.g., a plurality of sleeve protrusions 122 positioned about the axis 128). In further embodiments, the sleeve protrusion 122 can be positioned away from the end of the shank 106.
  • the illustrated recess 126 extends 360-degrees about the axis 128 and has a second outer diameter OD2 that is smaller than the first outer diameter OD1 of the sleeve protrusion 122.
  • the recess 126 can taper along the axis 128 and/or the recess 126 can be discontinuous about the axis 128 (e.g., a plurality of recesses 126 positioned about the axis 128).
  • the sleeve shank 106 further includes a third portion 132 positioned between the recess 126 and the flange 110 with respect to the bore axis 128, and the third portion 132 has a third outer diameter OD3.
  • the third outer diameter OD3 is larger than the first outer diameter OD1.
  • the third outer diameter OD3 can be substantially equal to the first outer diameter OD1, or the third outer diameter OD3 can be less than the first outer diameter OD1.
  • the outer surface 121 of the sleeve shank 106 includes a first step 133 (e.g., a first transition portion) between the sleeve protrusion 122 and the recess 126 along the axis 128 and a second step 135 (e.g., a second transition portion) between the recess 126 and the third portion 132 along the axis 128.
  • the recess 126 includes the first and second steps 133, 135.
  • the sleeve protrusion 122 includes the first step 133.
  • the holder block 82 includes a lower surface 142 (FIG. 3) secured to the one of the pedestals 68 (FIG. 2) of the drum 62.
  • the holder block 82 includes a block bore or slot 150 (FIG. 4) extending through a forward or leading surface 134.
  • the holder block 82 also includes apertures 136 for supporting fluid nozzle (not shown) providing spray envelopes 160, 188 (FIG. 3) that encompasses surfaces of the bit 74.
  • the holder block 82 and the slot 150 have circular profiles.
  • the holder block 82 includes a lateral opening 170 extending between sides of the holder block 82.
  • the slot 150 extends between the leading surface 134 and the lateral opening 170, and a rear opening (not shown) may extend between a rearward or trailing surface 138 of the block and the lateral opening 170.
  • the block bore 150 is defined by an inner surface 151 and includes a first portion 194 adjacent the trailing surface 138 and a block protrusion 198 (e.g., a second portion) positioned between the first portion 194 and the leading surface 134.
  • the first portion 194 has a first inner diameter ID1 that is larger than a second inner diameter ID2 of the block protrusion 198.
  • the first inner diameter ID1 and the second inner diameter ID2 are constant along the axis 128.
  • the block protrusion 198 extends 360-degrees about the axis 128.
  • the block protrusion 198 can taper along the axis 128 and/or the block protrusion 198 can be discontinuous about the axis 128 (e.g., a plurality of block protrusions 198 positioned about the axis 128).
  • the block bore 150 further includes a third portion 202 positioned between the block protrusion 198 and the leading surface 134, and the third portion
  • the third inner diameter ID3 is larger than the first inner diameter ID 1.
  • the third inner diameter ID3 can be substantially equal to the first inner diameter ID1, or the third inner diameter ID3 can be less than the first inner diameter ID1.
  • the inner surface 151 of the block bore 150 includes a third step
  • the block protrusion 198 includes the third and fourth steps 203, 205.
  • FIGS. 6-9 the sleeve shank 106 is illustrated being inserted within the block bore 150 through the leading surface 134 of the holder block 82.
  • FIG. 6 illustrates an initial stage of installation with the sleeve shank 106 passing relatively easily through the third portion 202 of the block bore 150.
  • the third outer diameter OD3 of the sleeve shank 106 is slightly less than the third inner diameter ID3 of the block bore 150 (e.g., an interface between the sleeve shank 106 and the block bore 150 includes a clearance fit), thus providing relatively easily sliding movement of the sleeve shank 106 into the block bore 150.
  • substantially no forces e.g., compressive forces
  • FIG. 7 illustrates another stage of installation where the end of the sleeve shank 106 (e.g., an end of the sleeve protrusion 122) engages the fourth step 205 of the block protrusion 198.
  • the first outer diameter OD1 of the sleeve protrusion 122 is greater than the second inner diameter ID2 of the block protrusion 198, thus requiring additional axial force along the axis 128 to move the sleeve 78 into the position shown in FIG. 8 than the axial force required to move the sleeve shank 106 from the position shown in FIG. 6 to the position shown in FIG. 7.
  • the interface between the sleeve shank 106 and the block bore 150 (e.g., engagement between the sleeve protrusion 122 and the block protrusion 198) includes an interference fit.
  • a press-fit portion or zone 206 (FIG. 8) is created between the sleeve shank 106 and the block bore 150 as the sleeve protrusion 122 slides past the block protrusion 198.
  • the interference fit between the sleeve protrusion 122 and the block protrusion 198 provides a compressive force F acting on the sleeve shank 106 by the inner surface 151 of the block bore 150.
  • the sleeve protrusion 122 slides past the block protrusion 198 to be received within the first portion 194 of the block bore 150 (FIG. 9).
  • the sleeve 78 is fully inserted into the block 82.
  • the bearing surface 120 of the flange 110 engages the leading surface 134 of the holder block 82.
  • Each portion 194, 198, 202 of the block bore 150 interfaces with the associated portion 122, 126, 132 of the sleeve shank 106 as a clearance fit when in the fully inserted position.
  • the first outer diameter OD1 of the sleeve protrusion 122 is slightly smaller than the first inner diameter ID1 of the first portion 194 of the block bore 150
  • the second outer diameter OD2 of the recess 126 of the sleeve shank 106 is slightly smaller than the second inner diameter ID2 of the block protrusion 198
  • the third outer diameter OD3 of the third portion 132 of the sleeve shank 106 is slightly smaller than the third inner diameter ID3 of the third portion 202 of the block bore 150.
  • the clearance fit interface between the sleeve shank 106 and the block bore 150 when in the fully inserted position decreases the compressive force F acting on the sleeve shank 106 in the press-fit zone 206 (FIG. 8).
  • the compressive force F is decreased to provide a substantially stress-free state of the sleeve shank 106.
  • the compressive force F can be decreased to provide a relatively small compressive force acting on the sleeve shank 106.
  • the interface between the sleeve shank 106 and the block bore 150 can include some portions having a clearance fit and some portions having an interference fit when in the fully inserted position.
  • the clearance fit interface between the sleeve shank 106 and the block bore 150 when in the fully inserted position allows for rotation of the sleeve shank 106 relative to the holder block 82.
  • Such rotation of the sleeve shank 106— and ultimately the bit 74— relative to the holder block 82 facilitates wear on the bit 74 to be evenly distributed during operation of the machine 10.
  • Conventional blocks may be secured to a cutting drum by welding while a sleeve is positioned within the block bore in an interference fit or press fit (e.g., the sleeve is in compression while the inner surface of the block is in tension).
  • heat generated by the welding process can be sufficient to relieve the residual stresses, thereby creating a fit or engagement that permits the sleeve to be easily dislodged from the block bore.
  • the sleeve shank 106 can only be inserted or extracted by passing through the press-fit zone 206, yet the sleeve shank 106 is not in a stressed condition in the fully installed position.
  • the stress induced on the sleeve protrusion 122 of the sleeve shank 106 and the block protrusion 198 of the block bore 150 by the interference fit does not exceed the yield strength of the sleeve shank 106 or the block 82, thereby avoiding plastic deformation.
  • FIG. 10 illustrates another embodiment of a sleeve 478.
  • the sleeve 478 is similar to the sleeve 78 with similar features identified by reference numbers incremented by 400.
  • the illustrated sleeve 478 includes at least one elongated slot or notch 502 formed in a wall of a sleeve shank 506.
  • the notch 502 extends through a first portion 522 and a recess 526 of the sleeve shank 506 along a bore axis 528, and also extends partially into a third portion 532 of the sleeve shank 506 along the bore axis 528.
  • the notch 502 permits greater resilient deformation of a rear portion of the sleeve shank 506 during insertion and extraction of the sleeve 478 without exceeding the yield strength of the sleeve 478. Accordingly, the interference fit between a sleeve protrusion 522 of the sleeve shank 506 and the block protrusion 198 may be more pronounced.
  • the interfacing features between the sleeve 78 and the holder block 82 can be oriented in an opposite configuration. For example, at least one of the protrusion 122, the recess 126, the third portion 132, the first step 133, the second step 135, etc.
  • FIG. 11 illustrates another embodiment of a sleeve 678 and a holder block 682.
  • the sleeve 678 is similar to the sleeve 78 and the holder block 682 is similar to the holder block 82 with similar features identified by reference numbers incremented by 600.
  • the holder block 682 includes a protrusion 722 having steps 633, 635, a first portion 794, and a third portion 802 with the first portion 794 positioned between the protrusion 722 and the third portion 802 along an axis 728.
  • the sleeve 678 includes a recess 626 having steps 803, 805, a first portion 807, and a third portion 732 with the first portion 807 positioned between the recess 626 and the third portion 732 along the axis 728.
  • the sleeve 678 and the holder block 682 transition from an interference fit (e.g., engagement between the step 803 of the sleeve 678 and the protrusion 722 of the holder block 682) to a clearance fit (e.g., when the protrusion 722 of the holder block 682 is received within the recess 626 of the sleeve 678).
  • an interference fit e.g., engagement between the step 803 of the sleeve 678 and the protrusion 722 of the holder block 682
  • a clearance fit e.g., when the protrusion 722 of the holder block 682 is received within the recess 626 of the sleeve 678.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

Ensemble coupant conçu pour être couplé à un tambour qui peut tourner autour d'un axe. L'ensemble coupant comprend un bloc ayant une surface avant et une surface interne. La surface interne forme un alésage de bloc s'étendant le long d'un axe à travers la surface avant et au moins partiellement à travers le bloc. L'ensemble coupant comprend également un manchon ayant une tige de manchon avec une surface externe, une bride, et un alésage de manchon s'étendant à travers la bride et au moins partiellement à travers la tige de manchon. Pendant l'installation du manchon sur le bloc, une interface entre la surface extérieure de la tige de manchon et la surface intérieure de l'alésage de bloc passe d'un ajustement serré à un ajustement avec jeu.
PCT/US2019/050838 2018-09-12 2019-09-12 Retenue de manchon pour ensemble pic coupant WO2020056153A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2019337639A AU2019337639A1 (en) 2018-09-12 2019-09-12 Sleeve retention for cutting pick assembly
PL437282A PL437282A1 (pl) 2018-09-12 2019-09-12 Ogranicznik tulei do zespołu noża urabiającego
CN201980070895.7A CN112912570A (zh) 2018-09-12 2019-09-12 用于切割镐组件的套筒保持件

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862730209P 2018-09-12 2018-09-12
US62/730,209 2018-09-12

Publications (1)

Publication Number Publication Date
WO2020056153A1 true WO2020056153A1 (fr) 2020-03-19

Family

ID=69720571

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2019/050838 WO2020056153A1 (fr) 2018-09-12 2019-09-12 Retenue de manchon pour ensemble pic coupant

Country Status (5)

Country Link
US (1) US20200080420A1 (fr)
CN (1) CN112912570A (fr)
AU (1) AU2019337639A1 (fr)
PL (1) PL437282A1 (fr)
WO (1) WO2020056153A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4489986A (en) * 1982-11-01 1984-12-25 Dziak William A Wear collar device for rotatable cutter bit
US5503463A (en) * 1994-12-23 1996-04-02 Rogers Tool Works, Inc. Retainer scheme for cutting tool
US7992945B2 (en) * 2006-08-11 2011-08-09 Schlumberger Technology Corporation Hollow pick shank
US8414085B2 (en) * 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3865437A (en) * 1973-08-16 1975-02-11 Kennametal Inc Rotary mining tool retaining structure
US4084856A (en) * 1976-02-09 1978-04-18 Fansteel Inc. Self-retaining sleeve and bit
GB8306641D0 (en) * 1983-03-10 1983-04-13 Wimet Mining Ltd Pick holding arrangements
US5415462A (en) * 1994-04-14 1995-05-16 Kennametal Inc. Rotatable cutting bit and bit holder
US6371567B1 (en) * 1999-03-22 2002-04-16 The Sollami Company Bit holders and bit blocks for road milling, mining and trenching equipment
US6685273B1 (en) * 2000-02-15 2004-02-03 The Sollami Company Streamlining bit assemblies for road milling, mining and trenching equipment
US8500209B2 (en) * 2006-08-11 2013-08-06 Schlumberger Technology Corporation Manually rotatable tool
CA2723281A1 (fr) * 2008-05-15 2009-11-19 Sandvik Intellectual Property Ab Manchon comprenant un trou presentant une extremite arriere evasee
CA2806762A1 (fr) * 2010-08-02 2012-02-09 Sandvik Intellectual Property Ab Pic niveleur rotatif qui comporte un accessoire d'elimination de debris, ensemble outil et bloc, et machine niveleuse
CA2982209A1 (fr) * 2015-04-10 2016-10-13 Joy Mm Delaware, Inc. Taillant et son outil d'extraction
US10502056B2 (en) * 2015-09-30 2019-12-10 The Sollami Company Reverse taper shanks and complementary base block bores for bit assemblies

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4489986A (en) * 1982-11-01 1984-12-25 Dziak William A Wear collar device for rotatable cutter bit
US5503463A (en) * 1994-12-23 1996-04-02 Rogers Tool Works, Inc. Retainer scheme for cutting tool
US7992945B2 (en) * 2006-08-11 2011-08-09 Schlumberger Technology Corporation Hollow pick shank
US8414085B2 (en) * 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element

Also Published As

Publication number Publication date
CN112912570A (zh) 2021-06-04
AU2019337639A1 (en) 2021-04-29
PL437282A1 (pl) 2021-11-29
US20200080420A1 (en) 2020-03-12

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