WO2009139692A1 - Sleeve with widening taper at rearward end of bore - Google Patents
Sleeve with widening taper at rearward end of bore Download PDFInfo
- Publication number
- WO2009139692A1 WO2009139692A1 PCT/SE2009/050377 SE2009050377W WO2009139692A1 WO 2009139692 A1 WO2009139692 A1 WO 2009139692A1 SE 2009050377 W SE2009050377 W SE 2009050377W WO 2009139692 A1 WO2009139692 A1 WO 2009139692A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sleeve
- block
- shank
- opening
- central bore
- Prior art date
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 26
- 238000005065 mining Methods 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 230000005641 tunneling Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
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
Definitions
- the present disclosure relates to a sleeve for a block and sleeve assembly.
- the sleeve has a central bore with a rearwardly opening taper to allow rearward removal of a shank of a sheared cutting pick from the sleeve.
- Sleeved block systems can be press-fit in openings in holder blocks.
- press-fitting makes removing and installing sleeves in the field very difficult and time consuming. Extreme force is often required to remove these sleeves from their holders. Hydraulic jacks are typically needed to perform this task. In some operating environments the use of hydraulic jacks or other equipment to remove press- fit sleeves is difficult and time-consuming.
- sleeve retaining methods such as clips, nuts or wedges in slots.
- nuts and wedges provide an advantageous biasing force to hold the sleeve in the opening.
- nuts are difficult to adjust and the slots for wedges increase manufacturing complexity and introduce a fracture generating hole in the shank of the sleeve.
- Clips have provided a size restriction to sleeve removal and are easily manipulated by a user, but have not generally provided a biasing force. A clip combining both a size restriction and a biasing force would be advantageous.
- An exemplary embodiment of a block and sleeve assembly comprises a holder block, and a hollow sleeve, wherein the hollow sleeve includes a shank portion, a head portion, and a shoulder portion, and a central bore extending rearwardly along the central axis from a first opening in a forwardmost surface of the head portion to a second opening in a rearwardmost surface of the shank portion, wherein the central bore has at least two portions, a first portion of the central bore has a surface located at a first radius and a second portion of the central bore has a surface with a rearwardly opening taper, and the first portion is axially forward of the second portion, and wherein the holder block comprises a base portion and a body portion, a first opening extending longitudinally from a front face of the body portion to receive the shank portion of the hollow sleeve, a second opening extending from a first side edge to a second side edge, and a bridge portion.
- FIG. 1 is a cross-sectional view of an exemplary embodiment of a block and sleeve assembly.
- the hollow sleeve 30 can be any suitable hollow sleeve.
- the central bore 38 of the hollow sleeve 30 extends rearwardly along the central axis A from a first opening 40 in a forwardmost surface 42 of the head portion 34 to a second opening 44 in a rearwardmost surface 46 of the shank portion 32.
- the central bore 38 has at least two portions, the first portion 48 located axially forward of the second portion 50.
- the first portion 48 has a surface located at a first radius Ri and the second portion 50 has a surface with a rearwardly opening taper 52 terminating at the second opening 44.
- the second opening 44 has a second radius R 2 , where the second radius R 2 is larger than the first radius R-i.
- FIG. 2 is another cross-sectional view of the exemplary embodiment of a block and sleeve assembly shown in FIG. 1.
- FIG. 2 shows the relationships between the rearwardly opening taper 52 and other features of the holder block 10 and the hollow sleeve 30.
- the rearwardly opening taper 52 has a first end 54 and a second end 56.
- the first end 54 has a smaller radius than the second end 56 and contacts the first portion 48 at a transition plane P.
- the second portion 50 of the central bore 38 is axially rearward of the shoulder portion 36, i.e., the transition plane P is axially rearward of the shoulder portion 36.
- an angle of the rearwardly opening taper and/or the distance from the beginning of the taper of the central bore of the sleeve to the surface of the side-to-side second opening in the holder block are sized to allow rearward removal of a shank of a sheared cutting pick from the sleeve.
- an angle of the rearwardly opening taper is suitably sized to allow, singly or in combination with the distance from the beginning of the taper of the central bore of the sleeve to the surface of the side-to-side second opening in the holder block, rearward removal of the shorn shank.
- FIG. 4 illustrates an example of removal of a shorn cutting pick shank.
- the sizing of the rearwardly opening taper 52 and/or the minimum distance from the first end 54 of the second portion 50 of the hollow sleeve 30 to a surface 58 of the second opening 20 in the holder block 10 allows the shorn cutting pick shank 110 to be driven rearwardly and out of the central bore 38.
- FIG. 5 An exemplary retainer 120 is shown in FIG. 5, which also illustrates the retainer 120 installed in a retainer groove 122.
- the retainer 120 snaps into the groove 122 at the rear of the shank portion 32 of the sleeve 30 (see, e.g., FIG. 1 ) and provides a force, urging the sleeve 30 rearward relative to the holder block 10 and into the first opening 16 of the holder block 10.
- the retainer 120 is made from spring steel with a curved profile. When installed, the curved profile is positioned with the concave portion oriented forwardly.
Landscapes
- 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
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112009001118T DE112009001118T5 (en) | 2008-05-15 | 2009-04-09 | Sleeve with extension at the rear end of the hole |
CA2723281A CA2723281A1 (en) | 2008-05-15 | 2009-04-09 | Sleeve with widening taper at rearward end of bore |
US12/991,819 US20110204701A1 (en) | 2008-05-15 | 2009-04-09 | Sleeve with widening taper at rearward end of bore |
AU2009247005A AU2009247005A1 (en) | 2008-05-15 | 2009-04-09 | Sleeve with widening taper at rearward end of bore |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5336708P | 2008-05-15 | 2008-05-15 | |
US61/053,367 | 2008-05-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009139692A1 true WO2009139692A1 (en) | 2009-11-19 |
Family
ID=41318910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2009/050377 WO2009139692A1 (en) | 2008-05-15 | 2009-04-09 | Sleeve with widening taper at rearward end of bore |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110204701A1 (en) |
AU (1) | AU2009247005A1 (en) |
CA (1) | CA2723281A1 (en) |
DE (1) | DE112009001118T5 (en) |
PL (1) | PL393048A1 (en) |
WO (1) | WO2009139692A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013021282A3 (en) * | 2011-08-09 | 2014-02-13 | Esco Hydra (Uk) Limited | Rotary cutter drum |
EP2845997A1 (en) * | 2013-09-06 | 2015-03-11 | Sandvik Intellectual Property AB | Cutting bit retaining assembly |
CN112912570A (en) * | 2018-09-12 | 2021-06-04 | 久益环球地下采矿有限责任公司 | Sleeve retainer for cutting pick assembly |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8740314B2 (en) | 2011-01-11 | 2014-06-03 | Joy Mm Delaware, Inc. | Bit holding system with an opening for removal of broken bits |
DE102012112343A1 (en) | 2012-12-28 | 2014-07-03 | Sandvik Intellectual Property Ab | Bit case for holding a tool bit in block mounted at rotatable unit of mining machine, has front and rear grooves that are provided in front and rear portions to receive the compression tapes |
DE212013000265U1 (en) * | 2013-01-02 | 2015-08-03 | Vermeer Manufacturing Co. | Open pit tooth holder |
CN103410509B (en) * | 2013-08-29 | 2016-08-10 | 安庆市灵宝机械有限责任公司 | One is easily installed pick box and assembly thereof |
US9765618B2 (en) * | 2015-01-28 | 2017-09-19 | Joy Mm Delaware, Inc. | Cutting bit assembly |
CN111706326B (en) * | 2015-01-28 | 2023-03-10 | 久益环球地下采矿有限责任公司 | Drill bit assembly |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU712495A1 (en) * | 1978-08-11 | 1980-01-30 | Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Институт Горного Дела Им.А.А.Скочинского | Cutting bit securing device |
US6059373A (en) * | 1995-04-06 | 2000-05-09 | Kennametal Inc. | Pick holder extraction |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5230548A (en) * | 1992-08-21 | 1993-07-27 | Southern Philip W | Longwall cutter drum having reduced production of dust |
US5370448A (en) * | 1993-05-17 | 1994-12-06 | Cincinnati Mine Machinery Company | Wedging arrangement for attaching a bit holder to the base member of a mining road working, or earth moving machine |
GB9400114D0 (en) * | 1994-01-05 | 1994-03-02 | Minnovation Ltd | Mineral pick box |
US6113195A (en) * | 1998-10-08 | 2000-09-05 | Sandvik Ab | Rotatable cutting bit and bit washer therefor |
US6331035B1 (en) * | 1999-03-19 | 2001-12-18 | Kennametal Pc Inc. | Cutting tool holder assembly with press fit |
AUPQ042699A0 (en) * | 1999-05-18 | 1999-06-10 | Road Services Of Australia Pty Ltd | A cutting apparatus |
AU2009247004A1 (en) * | 2008-05-15 | 2009-11-19 | Sandvik Intellectual Property Ab | Block and sleeve with rotation-inhibiting feature |
-
2009
- 2009-04-09 CA CA2723281A patent/CA2723281A1/en not_active Abandoned
- 2009-04-09 AU AU2009247005A patent/AU2009247005A1/en not_active Abandoned
- 2009-04-09 PL PL393048A patent/PL393048A1/en unknown
- 2009-04-09 US US12/991,819 patent/US20110204701A1/en not_active Abandoned
- 2009-04-09 WO PCT/SE2009/050377 patent/WO2009139692A1/en active Application Filing
- 2009-04-09 DE DE112009001118T patent/DE112009001118T5/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU712495A1 (en) * | 1978-08-11 | 1980-01-30 | Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Институт Горного Дела Им.А.А.Скочинского | Cutting bit securing device |
US6059373A (en) * | 1995-04-06 | 2000-05-09 | Kennametal Inc. | Pick holder extraction |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013021282A3 (en) * | 2011-08-09 | 2014-02-13 | Esco Hydra (Uk) Limited | Rotary cutter drum |
EP2845997A1 (en) * | 2013-09-06 | 2015-03-11 | Sandvik Intellectual Property AB | Cutting bit retaining assembly |
US9359895B2 (en) | 2013-09-06 | 2016-06-07 | Sandvik Intellectual Property Ab | Cutting bit retaining assembly |
CN112912570A (en) * | 2018-09-12 | 2021-06-04 | 久益环球地下采矿有限责任公司 | Sleeve retainer for cutting pick assembly |
Also Published As
Publication number | Publication date |
---|---|
AU2009247005A1 (en) | 2009-11-19 |
US20110204701A1 (en) | 2011-08-25 |
DE112009001118T5 (en) | 2011-06-16 |
PL393048A1 (en) | 2011-04-26 |
CA2723281A1 (en) | 2009-11-19 |
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