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WO1997005363A9 - Systeme de maintien de porte-outil pour outil tranchant - Google Patents

Systeme de maintien de porte-outil pour outil tranchant

Info

Publication number
WO1997005363A9
WO1997005363A9 PCT/US1996/012069 US9612069W WO9705363A9 WO 1997005363 A9 WO1997005363 A9 WO 1997005363A9 US 9612069 W US9612069 W US 9612069W WO 9705363 A9 WO9705363 A9 WO 9705363A9
Authority
WO
WIPO (PCT)
Prior art keywords
tool holder
pin
cutting tool
bore
holder
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.)
Ceased
Application number
PCT/US1996/012069
Other languages
English (en)
Other versions
WO1997005363A1 (fr
Filing date
Publication date
Priority claimed from US08/510,451 external-priority patent/US5607206A/en
Application filed filed Critical
Priority to DE0842349T priority Critical patent/DE842349T1/de
Priority to AU65930/96A priority patent/AU708619B2/en
Priority to DE69607006T priority patent/DE69607006T2/de
Priority to EP96925412A priority patent/EP0842349B1/fr
Publication of WO1997005363A1 publication Critical patent/WO1997005363A1/fr
Publication of WO1997005363A9 publication Critical patent/WO1997005363A9/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Definitions

  • This invention relates to excavation cutting tools, and more particularly to a retention system for retaining an excavation cutting tool holder in a support block during use.
  • Excavation cutting tool assemblies for such applications as continuous mining or road milling typically comprise a cutting tool, sometimes referred to as a cutting bit, rotatably mounted within a support block.
  • the support block in turn is mounted onto a drum or other body, typically by welding, which in turn is driven by a suitable power means.
  • a suitable power means When a number of such support blocks carrying cutting tools are mounted onto a drum, and the drum is driven, the cutting tools will engage and break up the material which is sought to be mined or removed.
  • the general operation of such a mining machine is well known in the art.
  • the support block Because the support block is exposed, it is subject to wear and abuse and must be cut or torched off -4 -
  • the excavation cutting tool holder retention system comprises a cutting tool holder having a holder engagement surface and a support block having a tool holder bore into which the cutting tool is inserted and a block pin bore intersecting the tool holder bore.
  • the block pin bore defines a block engagement surface which is inclined downwardly relative to the tool holder bore. A pin engages the block engagement surface and the holder engagement surface such that the pin may be moved to draw the cutting tool holder into the tool holder bore.
  • the support block has block pin bores which define the block engagement surface and are inclined downwardly.
  • the holder engagement surface of the cutting tool holder is a transverse pin bore.
  • the pin runs through and engages the transverse pin bore of the cutting tool holder.
  • the pin has a pin shaft, a first jam member, and a second jam member, the first and second jam members each having a block engagement portion which movably engages the block pin bores. At least one of the fir ⁇ t and second jam members is movable along the pin shaft relative to the other of the first and second jam members such that the block engagement portion of the first and second jam members is moved along the block pin bores and the cutting tool holder is drawn into the tool holder bore.
  • the pin shaft has a threaded portion and one of the first and second jam members has a threaded jam bore such that one of the first and second jam members may threadably engage the pin shaft and be moved relative to the other of the first and second jam members.
  • the first jam member may have a first aligned cylindrical portion and a first angled cylindrical portion and the second jam member may have a second aligned cylindrical portion and channel, to resist forces tending to pivot the cutting tool holder about the pin.
  • the Krekeler patent relies upon a close tolerance fit to minimize rotational movement of the cutting tool and cutting tool holder about the pin during use. Otherwise, movement of the cutting tool holder in the support block will cause unnecessary wear to the cutting tool, the cutting tool holder, and the support block.
  • U.S. Patent No. 4,650,254 to Wechner discloses the use of two bolts to connect a cutting tool holder to a block.
  • the two bolts pass horizontally through the rear surface of the support block and through the shank portion of the cutting tool holder. Such a connection may be subject to vibratory loosening.
  • An object of the present invention is to provide an improved excavation cutting tool holder retention system which allows a cutting tool holder to be securely fastened to a support block in such a manner as to minimize or eliminate any movement or loosening of the cutting holder within the support block.
  • an improved excavation cutting tool holder retention system comprises a cutting tool holder having a holder engagement surface and a support block having a tool holder bore into which the cutting tool holder is inserted.
  • a pin having a pin engagement surface is movably mounted to the support block such that the pin engagement surface may be moved to engage the holder engagement surface.
  • At least one of the holder and pin engagement surfaces defines an inclined surface such that when the pin engagement surface is moved to engage the holder engagement surface the shank portion of the -6-
  • At least one of the holder and pin engagement surfaces defines an inclined surface such that when the pin engagement surface is moved to engage the holder engagement surface the shank portion will be drawn into the tool holder bore of the support block.
  • an improved cutting tool holder for use with a support block and pin, the support block having a tool holder bore into which the cutting tool holder is inserted and block pin bores inclined downwardly, the pin having a pin shaft, a first jam member, and a second jam member movable along the pin shaft relative to the first jam member, the first and second jam members movably engaging the block pin bores.
  • the improved cutting tool holder of this embodiment comprises an outer wear region and a shank portion.
  • the shank portion has a transverse pin bore which i ⁇ substantially aligned with the block pin bores when the shank portion i ⁇ inserted into the tool holder bore such that the pin can run between the block pin bores through the transver ⁇ e pin bore.
  • the first and second jam members engage the block pin bores and the transverse pin bore such that moving the second jam member relative to the first jam member will draw the shank portion into the tool holder bore of the support block.
  • the shank portion has a holder slot such that the shank portion may be removed from the tool holder bore of the support block by moving the second jam member relative to the first jam member such that the fir ⁇ t and second jam members no longer interfere with the transverse pin bore.
  • the block pin bores and the jam members are configured such that the jam members will not rotate within the block pin bores.
  • This feature provides alignment and orientation properties to properly and easily as ⁇ emble the pin in the a second angled cylindrical portion such that the first and second aligned cylindrical portions engage the transverse pin bore of the cutting tool holder and the first and second angled cylindrical portions define the block engagement portion and engage the block pin bores.
  • the cutting tool holder has a holder slot intersecting the transver ⁇ e pin bore such that the cutting tool holder may be removed from the tool holder bore of the support block by moving the second jam member relative to the first jam member such that the first and second jam members do not interfere with the transverse pin bore and the cutting tool holder may be withdrawn from the tool holder bore while the fir ⁇ t and ⁇ econd jam member ⁇ ⁇ till movably engage the block pin bores.
  • At least one of the cutting tool holder and tool holder bore is tapered such that the cutting tool holder will be drawn and wedged into the tool holder bore of the support block when the pin engagement surface is moved to engage the holder engagement surface.
  • the tool holder has a holder shoulder and the support block has a seating shoulder region adjacent the tool holder bore.
  • the holder shoulder will abut the seating shoulder region.
  • the present invention also include ⁇ an improved cutting tool holder for u ⁇ e with a ⁇ upport block having a cutting tool holder bore into which the cutting tool holder i ⁇ in ⁇ erted and a pin having a pin engagement ⁇ urface, the pin being movably mounted to the ⁇ upport block.
  • the improved cutting tool holder comprises an outer wear region and a shank portion.
  • the shank portion has a holder engagement surface which engages the pin -8 -
  • FIGURE 1 is a side view of a support block, cutting tool sleeve, and cutting tool showing one embodiment of the invention
  • FIGURE 2 is a sectional view taken along the plane indicated by line 2-2 in FIGURE 1, the left half showing the invention in the loose condition and the right half showing the tightened condition;
  • FIGURE 3 is a sectional view showing an alternative pin
  • FIGURE 4 is a side view of a support block, cutting tool sleeve, and cutting tool ⁇ howing an alternative embodiment of the invention
  • FIGURE 5 is a sectional view taken along the plane indicated by line 5-5 in Figure 4
  • FIGURE 6 is a sectional view taken along the plane indicated by line 6-6 in Figure 4;
  • FIGURE 7 is a ⁇ ide view of a ⁇ upport block, cutting tool holder, and cutting tool ⁇ howing another alternative embodiment of the invention
  • This mating feature may consist of a pin and groove arrangement.
  • the present invention al ⁇ o includes a pin for use with a support block and a cutting tool holder, the tool holder having a transverse pin bore, the support block having a tool holder bore into which the cutting tool holder is in ⁇ erted and block pin bore ⁇ inclined downwardly to and inter ⁇ ecting the tran ⁇ verse pin bore, the pin comprising a pin shaft having a first pitch threaded portion and a second pitch threaded portion, a first jam member having a first aligned cylindrical portion, a first angled cylindrical portion, and a first threaded jam bore, and a second jam member having a second aligned cylindrical portion, a second angled cylindrical portion, and a second threaded jam bore, the first jam member being threaded onto the first pitch threaded portion of the pin shaft and the second jam member being threaded onto the second pitch threaded portion of the pin shaft such that the first and second aligned cylindrical portions may engage the transverse pin bore and the first and second angled cylindrical portions may engage the block pin bore ⁇ .
  • the advantages resulting from this invention are numerous.
  • the cutting tool holder will be drawn into an especially tight relationship with the tool holder bore.
  • Thi ⁇ tight fit is especially secure if one or both of the shank portion or tool holder bore is tapered so that the shank portion of the cutting tool is wedged into the tool holder bore when the components are engaged by utilizing the pin.
  • the security of the fit is also increased if the tool holder has a holder shoulder which abuts a seating shoulder region of the support block when the cutting tool holder is drawn into the tool holder bore.
  • Another advantage of this present invention is that the tool holder bore of the support block may have a - 10-
  • the cutting tool 18 also includes a tool shank 28 adjoining a shoulder 30 of the conical outer region 26. Because such cutting tools are generally known in the art, they need not be described in further detail here.
  • Cutting tool holders may have a variety of configurations.
  • the cutting tool holder 14 shown in this embodiment has an outer wear region 32 and a shank portion 34 joined at a holder shoulder 36.
  • the cutting tool holder 14 defines a tool bore 38 in which the cutting tool 18 may be rotatably or otherwise mounted.
  • Such rotatable or non-rotatable mountings are well known in the art, and will not be described in further detail here.
  • shank portion 34 of the cutting tool holder 14 may have a variety of configurations, the shank portion 34 as shown is tapered.
  • the shank portion 34 may be made of solid material, or as shown here, may have a cavity such as a vertical bore 44.
  • the shank portion 34 also has a holder engagement recess which in this embodiment comprise ⁇ transverse pin bores 46 which are aligned along the axis designated "A" and which intersect the center axis "B" of the shank portion 34.
  • the transverse pin bores 46 are tapered.
  • the holder engagement recess has a holder engagement surface 48 which in the embodiment shown is the lower inclined surface of the tapered transverse pin bores 46.
  • the support block 12 typically has a tool holder bore 54 surrounded by a seating shoulder region 56.
  • the tool holder bore 54 in this preferred embodi ⁇ ment is tapered so as to match the taper of the shank portion 34 of the cutting tool holder 14. It has been found preferable that the maximum total included taper angle be approximately 16°. showing the invention in the loose condition and the right half showing the tightened condition;
  • FIGURE 9 is a side view of the shank portion of the cutting tool holder;
  • FIGURE 10 is a side view of a threaded pin;
  • FIGURE 11 is a side view of a first jam member
  • FIGURE 12 is a side view of a second jam member.
  • the cutting tool retention system 10 includes a support block 12 and a cutting tool holder 14 mated to the support block 12 via pins 16.
  • a cutting tool 18 may be rotatably and releasably mounted within the cutting tool holder 14.
  • the scope of this invention would cover cutting tool holder retention systems in which the cutting tool is non-rotatably mounted.
  • such support blocks 12 can be distributed over and fastened to, such as by welding, the circumference and length of a drum or other body (not shown) according to any desired pattern.
  • the drum or other body may be driven by any conventional and suitable power means to cause the cutting tools 18 to engage and break up material that they are applied to. Such application ⁇ are well known in the art, and will not be de ⁇ cribed further here.
  • the cutting tool 18 typically has an elongated body.
  • the cutting end 22 of the cutting tool 18 typically comprises a hard cutting insert 24 mounted onto a generally conical outer region 26.
  • This hard cutting insert 24 may be made from cemented tung ⁇ ten carbide or any other suitable material.
  • the hard cutting insert 24 is generally mounted at the end of the conical outer -12 -
  • pins 16 may be made of any suitable material, an alloy steel, such as SAE 4140 or SAE 4340, is preferred.
  • the axes of the transverse pin bores 46, and correspondingly the block pin bores 62 need not intersect the tool bore 38 in a perpendicular relationship. In ⁇ tead, the transverse and block pin bores may be inclined at an angle to the tool bore 38, preferably downwardly from the block surface 58 to the center axis "E" of the tool holder 14 at an angle between 70° and 90°. Furthermore, if two or more pins are used, the axes of the transverse pin bore ⁇ , and correspondingly the block pin bores, need not be tran ⁇ versely aligned, nor is it required that they intersect.
  • the holder shank portion 34 of the cutting tool holder 14 is inserted into the tool holder bore 54 of the support block 12 such that the transverse pin bores 46 of the cutting tool holder 14 and the block pin bores 62 of the support block 12 are roughly aligned.
  • the pins 16 are then inserted into the support block pin bores 62.
  • the transverse pin bores 46 and the block pin bores 62 are still roughly aligned as illustrated by the axes "A" and "D" shown on the left half of Figure 2.
  • the pins 16 are then moved such that the inclined ⁇ urface 74 of the pin engagement surface 72 will engage the holder engagement surface 48 of the cutting tool holder 14. This movement of the pins 16 is accomplished via the tightening end 76 of the pin 16
  • the support block 12 also has a side surface 58 and a base 60 which may be mounted to a drum or other body (not shown) by way of welding or any other suitable method.
  • the tool holder bore 54, and accordingly the cutting tool holder 14 and the cutting tool 18, is typically pitched in the direction of travel of the cutting tool 18, designated as direction "C" in Figure 1.
  • the support block 12 has block pin bores 62, which are transversely aligned along the axis de ⁇ ignated "D" and which intersect the center axis "B" of the tool holder bore 54 in a perpendicular relationship.
  • the block pin bores 62 have a block threaded portion 64 extending from the ⁇ ide surface 58 to the tool holder bore 54. At the end of the threaded portion, an annular groove 66 may optionally be provided in which an O-ring 68 may be housed.
  • the pins 16 are movably mounted to the support block 12. In this embodiment of the invention, the pins 16 are movably mounted via a block engagement portion 70 which is threaded.
  • the threaded block engagement portion 70 of the pin 16 is de ⁇ igned to threadably engage the threaded portion 64 of the block pin bores 62 of the support block 12.
  • the pins 16 also have a pin engagement surface 72 which in this embodiment is tapered such as to provide an inclined surface 74 to engage the holder engagement surface 48 of the holder engagement recess 46.
  • the pins 16 al ⁇ o have a tightening end 76.
  • the tightening end 76 preferably has a configuration, such as a non-circular shape, a protrusion, or a receiving aperture, by which a tool may be used to tighten the pins 16 in the block pin bores 62 as will be set forth.
  • the configuration comprises a hexagonal receiving aperture 78 designed to receive an alien wrench.
  • FIG. 3 is a sectional view similar to Figure 2.
  • This embodiment is very similar to the cutting tool holder retention system 10 shown in Figures 1 and 2. Accordingly, the same components have been referenced using the same reference characters followed by an apostrophe.
  • the main difference is the pin 100 which in this embodiment comprises a screw or threaded bolt 102, a jam member 104, and a cone member 106.
  • the jam member 104 has cone end 108, a cylindrical section 110, a tool end 112, and a threaded throughbore 114.
  • the tool end 112 preferably has a configuration, such as a non- circular shape, a protrusion, or a receiving aperture, by which a tool may be used to retain the jam member 104 in a stationary po ⁇ ition while the screw or threaded bolt 102 is being tightened.
  • the tool end 112 has a hexagonal nut configuration designed to be engaged by a wrench.
  • the cone member 106 has a cone end 116, a cylindrical end 118, and a smooth throughbore 120.
  • the exterior surface of the cone ends 108 and 116 define pin engagement surfaces 122 and 124 respectively which, as a result of the taper of the cone ends 108 and 116, provide inclined surfaces to engage the holder engagement surfaces 48' of the pin bores 46'. It is preferred that the pin engagement surfaces 122 and 124, and the pin engagement surfaces 48', have a maximum total included angle of approximately 16°.
  • the screw or threaded bolt 102 has a threaded shaft 126 and a head 128 preferably with a configuration, such as a non-circular shape, a protrusion, or a receiving aperture, by which a tool may be used to tighten the screw or threaded bolt 102 in relation to the jam member 104.
  • the configuration of the head 128 is hexagonal such as to be engaged by a suitable wrench. which is engaged, with a tool (not shown) or other means, so as to threadably engage the threaded block engagement portion 74 of the pin 16 in the threaded portion 64 of
  • Nylok manufactured by Nylok Fastener Corporation, or any other suitable material or adhesive, may be employed to help prevent the pin 16 from backing out of the block pin bore 62 during use.
  • the holder shank 34 of the cutting tool holder 14 will be forcibly wedged downward in the direction marked "E" into a tight fitting relationship with the tool holder bore 54 of the ⁇ upport block 12 until the holder shoulder 36 abuts the seating shoulder region 56.
  • the axi ⁇ "A" of the transverse pin bores 46 and the axi ⁇ "D” of the block pin bores 62 will be substantially coincident as ⁇ hown on the right half of Figure 2.
  • the holder engagement surface 48 and pin engagement surface 72 each have a maximum total included angle of approximately 16°.
  • the resulting fit, as shown on the right side of Figure 2, is especially secure because the holder shank portion 34 and the tool holder bore 54 are matingly tapered.
  • the cutting tool holder 206 in this embodiment is generally symmetrical about the axis "I" and includes an outer wear region 214 and a holder shoulder 216.
  • the cutting tool holder 206 defines a tool bore 218 in which the cutting tool 212 may be rotatably and releasably mounted.
  • the tool bore 218 defines an annular keeper groove 220.
  • the cutting tool 212 shown in this embodiment has a tool shank 222 defining an annular shank groove 224 adapted for receiving a ⁇ plit keeper ring 226 having projections 228.
  • the tool shank 222 is rotatably mounted within the tool bore 218 via the projections 228 of the split keeper ring 226 which fit within the annular keeper groove 220 of the tool bore 218.
  • Such a mounting is described in U.S. Patent No. 3,519,309 to Engle et al. and is generally known in the art.
  • the cutting tool 212 could be rotatably mounted within the tool bore 218 via the mounting di ⁇ clo ⁇ ed in a co-pending application entitled “Cutting Tool Retention System,” filed on August 2, 1995, having U.S.S.N. 08/510,160, and naming Ted Richard Massa as the inventor.
  • the shank portion 208 of the cutting tool holder 206 of this embodiment comprises a generally cylindrical portion 230 and an upper tapered portion 232
  • Thi ⁇ alternative embodiment is also different from the embodiment di ⁇ clo ⁇ ed in Figure ⁇ 1 and 2 in that the block 12 ' of this embodiment has a block pin bore 130 which is not threaded, but instead is smooth-walled so as to slidably receive the cylindrical section 110 of the jam member 104 and the cylindrical end 118 of the cone member 106.
  • the jam member 104 is then threadably tightened onto the shaft 126 such that the pin engagement surfaces 122 and 124 will engage the holder engagement surface 48' of the cutting tool holder 14'. Because at least one, in this case both, of the holder engagement surfaces 48' and the pin engagement surfaces 122 and 124 defines an inclined surface, the shank portion 34 ' of the cutting tool holder 14 ' will be wedged downward in the direction marked "G" into a tight fitting relationship with the main bore 54 • of the support block 12' until the holder shoulder 36' abuts the seating shoulder region 56' as shown in Figure 3. In order to accomplish this result, it is preferred that the holder engagement ⁇ urface 48' and pin engagement ⁇ urfaces 122 and 124 have a maximum total included angle of approximately 16°.
  • Another alternative embodiment of the cutting tool holder retention system 200 is shown in Figures 4, 5 and 6. This cutting tool retention 200 includes a - 18 -
  • the holder engagement ⁇ urface 236 and the pin engagement surface 242 defines an inclined ⁇ urface, the tapered portion 232 of the holder ⁇ hank portion 208 of the cutting tool holder 206 will be wedged downward into a tight fitting relationship with the main bore 204 of the support block 202 until the holder shoulder 216 abuts the seating shoulder region 238 of the support block 202 as shown in Figure 5.
  • the holder engagement surfaces 236 and the pin engagement surfaces 242 have a maximum total included angle of approximately 16°.
  • the pins 208 be set at an angle of approximately 70° to 90° relative to the axis "I" of the main bore 204 of the support block 202.
  • a ⁇ shown in Figure 5 it is also preferred that the pin ⁇ 208 be inclined downwardly from the surface of the support block 202 to the axis "I" of the tool holder 214.
  • the axes "H" of the pins 210 and the block pin bores 240 preferably intersect at the center axis "I" of the main bore 204, many other arrangements are pos ⁇ ible and included in the ⁇ cope of thi ⁇ invention.
  • two pins 210 are ⁇ hown as being used, one or more pins may be used.
  • This cutting tool holder retention system 300 includes a support block 302 having a tool holder bore 304 and block pin bores 306, a cutting tool holder 308 having a holder shank portion 310, and a pin 312.
  • a cutting tool 314 may be rotatably mounted within the adjacent the shoulder 216.
  • the shank portion 208 also has a holder engagement recess which in this embodiment comprise ⁇ inclined holder pin bores 234, the axes of which intersect the center axis "I" of the shank portion 208.
  • the holder engagement recess has a holder engagement surface 236 which in the embodiment shown is the lower inclined surface defined by the tapered surface of the inclined holder pin bores 234.
  • the support block 202 has a seating shoulder region 238.
  • the support block 202 define ⁇ inclined block pin bores 240 having a center axis "H" which intersects the center axis "I" of the main bore 204 of the support block 202.
  • the inclined block pin bores 240 in this embodiment are threaded.
  • the axes "H" of the two block pin bores 240 intersect at an angle, in this example at 90° relative to each other.
  • the axes of the two block pin bores 240 could inter ⁇ ect at any given angle, and in actuality, need not intersect at all.
  • the pins 210 have a ⁇ tructure identical to the pins 16 described with regard to the embodiments shown in Figures 1 and 2. Accordingly, the pins 210 have a pin engagement surface 242 which are tapered to provide an inclined surface to engage the holder engagement surface 236 of the holder engagement reces ⁇ , i.e., the inclined holder pin bore ⁇ 234 shown in this embodiment. Similar to the embodiments shown in Figures 1 and 2, the pins 210 are inserted into the inclined block pin bores 240 after being roughly aligned with the inclined holder pin bores 234. At this point, there will preferably be a small gap between the holder shoulder 216 and the seating shoulder region 238 of the support block 202.
  • the pins 210 are then threadably moved such that the pin engagement surface 242 will engage the holder engagement surface 236 of the cutting tool holder 206. Because at least one, in this case both, of the -20-
  • the mating pins 321 may be made of any suitable material, such as 52100 steel.
  • the holder shank portion 310 also defines a holder slot 322 defined by two vertical slot sides 324 which intersect the transverse pin bore 318. Additionally, the holder shank 310 defines jam recesses 326 having vertical recess walls 327.
  • the tool holder bore 304 of the support block 302 may be partially surrounded but is more typically fully surrounded by a seating shoulder region 328.
  • the tool holder bore 304 of this embodiment has a holder bore center axis "l IH which coincides with the axis "I” of the shank portion 310 of the cutting tool holder 308 when the components are assembled as shown.
  • the support block 302 has block pin bores 330, which are cylindrical and aligned along the block pin bore axes designated "K.” As shown in Figure 8, the block pin bore axes "K” intersect the axi ⁇ "J" of the transverse pin bore 318 at an angle "L.
  • the block pin bores 330 have a block engagement surface 332, which in the embodiment shown is the surface defined by the block pin bores 330, especially the upper surface when locking the tool holder 308 and the lower surface when releasing the tool holder 308. As shown in Figure 8, the block engagement surface 332, and in this embodiment the block pin bores 330 having axes "K, " are inclined downwardly relative to the tool holder bore 304.
  • the 312 includes a pin shaft 340, a first jam member 342 and a second jam member 344 which are assembled along the center axis "J."
  • the pin shaft 340 in this embodiment has a first pitch threaded portion 346, an unthreaded cutting tool holder 308. While the geometrical configurations of the support block 302, cutting tool holder 308, and cutting tool 314 may vary in an infinite number of ways, this embodiment is identical to the embodiment shown in Figures 1 and 2 with the exception that the shank portion 310 of the cutting tool holder 308, the block pin bores 306 of the ⁇ upport block 302 and the pin 312 have been altered. Accordingly, only those components of the holder retention system 300 which have been altered will be described in further detail with regard to this embodiment.
  • the cutting tool holder 308 typically has an outer wear region 315 joining the holder shank portion 310 at a holder shoulder 316. While the holder shank portion 310 of the cutting tool holder 308 may have a variety of configurations, the holder shank portion 310 as shown in Figures 7, 8, and 9 is tapered along a center axis "I.”
  • the holder shank portion 310 may be made of a solid material, or as shown in Figure 8, may have a cavity such as a vertical bore 317.
  • the shank portion 310 also has a holder engagement reces ⁇ which in this embodiment comprises a transverse pin bore 318.
  • the transverse pin bore 318 in this embodiment is cylindrical and aligned along a center axis designated "J" and which preferably intersects the center axi ⁇ "I" of the shank portion 310.
  • the holder engagement reces ⁇ ha ⁇ a holder engagement ⁇ urface 320 which in the embodiment ⁇ hown, is the surface defined by the transver ⁇ e pin bore 318, e ⁇ pecially the lower surface when locking the tool holder 308 and the upper surface when releasing the tool holder 308.
  • the pin bores 318 also define pin bore grooves 319 along the lower surface of the pin bores 318.
  • the pin bore grooves 319 in this embodiment are semi-cylindrical in shape.
  • Mating pins 321 having a cylindrical configuration reside within the pin bore grooves 319.
  • the mating pins 321 may -22 -
  • the block engagement portion 370 is the outer surface, especially the upper surface when locking and the lower surface when releasing, of the angled cylindrical portion 362.
  • the second jam member 344 is a mirror image duplicate of the first jam member 342.
  • the second jam member 344 has an aligned cylindrical portion 356', a chamfer 358', a jam shoulder 360', an angled cylindrical portion 362', a threaded jam bore 364' which in the embodiment shown has a right hand thread manufactured to threadably engage the second pitch threaded portion 350 of the pin shaft 340, and a pin engagement surface 366' including a holder engagement portion 368' and a block engagement portion 370'.
  • the angled cylindrical portion 362* of the second jam member 344 has an axis "K" set at an angle "L" to the center axis "J" of the aligned cylindrical portion 356' .
  • first jam member 342 is shown as having a left hand threaded jam bore 364 and the second jam member 344 is shown as having a right hand threaded jam bore 364, that need not be the case.
  • the threaded jam bores of the first and second jam member ⁇ 342 and 344 need only have pitche ⁇ which differ.
  • the first or second jam member, 342 or 344 is partially threaded onto the first or second pitch threaded portion respectively, 346 or 350, of the pin shaft 340.
  • the pin shaft 340, together with the one first or second jam member 342 or 344, is then inserted portion 348, and a second pitch threaded portion 350. While not shown, the pin shaft need not have an unthreaded portion.
  • the first pitch threaded portion 346 is shown a ⁇ being a left hand threaded portion and the second pitch threaded portion is shown as being a right hand threaded portion, that need not be the case.
  • the pin shaft if threaded, could have threaded portions which are both left hand or right hand but which differ in thread pitch. While the threads may be made in any suitable manner, as shown in Figure 4 the fir ⁇ t and ⁇ econd pitch threaded portions 346 and 350 may be cold rolled.
  • the pin shaft 340 also has an engagement structure 352 which, in the embodiment shown, constitutes hexagonal recesses centered along the axis "J" of the pin shaft 340.
  • the fir ⁇ t jam member 342 ha ⁇ an aligned cylindrical portion 356 aligned along the axis "J," the outer end of which ha ⁇ a chamfer 358, preferably at an angle of 45° to the axis "J".
  • Adjoining the aligned cylindrical portion 356 at a jam shoulder 360 is an angled cylindrical portion 362 having a center axis
  • the first jam member 342 also defines a threaded jam bore 364 which, in the embodiment shown, constitutes a left hand threaded bore manufactured to threadably engage the first pitch threaded portion 346 of the pin shaft 340.
  • the first jam member 342 also defines a mating groove 365 along the lower surface of the angled cylindrical portion 362.
  • the mating groove 365 has a semi-cylindrical configuration designed to mate with the mating pin 321 as will be explained in further detail.
  • the pin 312 has a pin engagement surface 366.
  • the pin engagement surface 366 has a holder engagement portion 368 and a block engagement portion 370.
  • the holder engagement portions 368 and 368' of the pin engagement surfaces 366 and 366' of the jam members, 342 and 344 will engage the holder engagement surface 320 of the cutting tool holder shank portion 310 thereby forcibly wedging the cutting tool holder shank portion 310 of the cutting tool holder 308 in the direction marked "N," as shown in Figure 8, into a tight fitting relationship with the tool holder bore 304 of the support block 302 until the holder shoulder 316 abuts the seating shoulder region 328 as shown on the right half of Figure 8. As shown on the right half of Figure 8, the jam shoulder 360 may then protrude into the jam rece ⁇ 326 of the cutting tool holder ⁇ hank portion 310.
  • the holder shank portion 310 of the cutting tool holder 308 may then be inserted into the tool holder bore 304 of the support block 302 such that the pin shaft 340 will slide through the holder slot 322 into the transverse pin bore 318 of the cutting tool holder shank portion 310.
  • the holder shank portion 310 of the cutting tool holder 308 will be loosely fitted within the tool holder bore 304 of the support block 302.
  • the threaded jam bore 364 constitutes a 37/64" through hole, tapped to 5/8" - 24 thread, right or left handed as required, and the unthreaded portion 348 of the pin shaft
  • first and second pitch threaded portions 346 and 350 are 5/8" - 24 thread, left or right handed as required. All of the components may be made from any appropriate grade of steel, such as grade 4140 steel, 38-43 HRC.
  • the pin shaft 340 i ⁇ simply rotated in the opposite direction via the engagement structure 352 until the cutting tool holder ⁇ hank portion 310 can be removed from the tool holder bore 304 and the pin shaft 340 via the holder slot 322.
  • the first and second jam members, 342 and 344 need not be removed from the pin shaft 340, and the mating grooves 365 and 365' need not be disengaged from the mating pins 321, for the cutting tool holder 308 to be removed.
  • the matching cylindrical surface ⁇ of the tran ⁇ verse pin bore 318 and the aligned cylindrical portions 356 and 356' of the jam members, 342 and 344, together with the matching cylindrical surfaces of the block pin bores 330, and the corresponding angled cylindrical portions 362 and 362' of the jam members, will provide a better contacting relationship between the engagement surfaces, thereby lowering contact stresses. Furthermore, because the pin shaft 340 moves in the direction "M" as the cutting tool holder retention system 300 is tightened, a locking -28-
  • An excavation cutting tool holder retention system comprising: a cutting tool holder having a holder engagement surface and a shank portion; a support block having a tool holder bore into which the shank portion of the cutting tool holder i ⁇ in ⁇ erted; and a pin having a pin engagement ⁇ urface, the pin being movably mounted to the support block such that the pin engagement ⁇ urface may be moved to engage the holder engagement surface, at least one of the holder and pin engagement surfaces defining an inclined surface, and at least one of the shank portion and tool holder bore being tapered, such that when the pin engagement surface is moved to engage the holder engagement surface, the shank portion of the cutting tool holder will be drawn and wedged into the tool holder bore of the support block.
  • the excavation cutting tool holder retention sy ⁇ tem of claim 5 wherein the pin is threadably mounted to the support block such that the pin engagement

Abstract

La présente invention a pour objet un système de maintien de port-outil pour outil tranchant. Ledit système comprend un porte-outil pour outil tranchant doté d'une surface d'emboîtement et un bloc support doté d'un alésage dans lequel est inséré le porte-outil. Une goupille dotée d'une surface d'emboîtement est montée amovible sur le bloc support, de telle sorte que sa surface d'emboîtement peut être déplacée pour permettre l'emboîtement du porte-outil par sa surface d'emboîtement. Au moins l'une de ces deux surfaces est inclinée, si bien que, lorsque la surface d'emboîtement de la goupille est déplacée pour permettre l'emboîtement du porte-outil, la partie queue du porte-outil s'enfonce dans l'alésage. Dans la forme de réalisation préférée, au moins la partie queue ou l'alésage du porte-outil est de forme conique, ce qui permet à ladite partie queue d'être calée dans l'alésage du porte-outil sur le bloc support lorsque la surface d'emboîtement de la goupille est déplacée pour permettre l'emboîtement de la surface d'emboîtement du porte-outil.
PCT/US1996/012069 1995-08-02 1996-07-19 Systeme de maintien de porte-outil pour outil tranchant Ceased WO1997005363A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE0842349T DE842349T1 (de) 1995-08-02 1996-07-19 Befestigungssystem für schneidwerkzeughalter
AU65930/96A AU708619B2 (en) 1995-08-02 1996-07-19 Cutting tool holder retention system
DE69607006T DE69607006T2 (de) 1995-08-02 1996-07-19 Befestigungssystem für schneidwerkzeughalter
EP96925412A EP0842349B1 (fr) 1995-08-02 1996-07-19 Systeme de maintien de porte-outil pour outil tranchant

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US08/510,451 US5607206A (en) 1995-08-02 1995-08-02 Cutting tool holder retention system
US08/510,451 1995-08-02
US08/639,050 1996-04-24
US08/639,050 US5769505A (en) 1995-08-02 1996-04-24 Cutting tool holder retention system

Publications (2)

Publication Number Publication Date
WO1997005363A1 WO1997005363A1 (fr) 1997-02-13
WO1997005363A9 true WO1997005363A9 (fr) 1997-03-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/012069 Ceased WO1997005363A1 (fr) 1995-08-02 1996-07-19 Systeme de maintien de porte-outil pour outil tranchant

Country Status (7)

Country Link
EP (1) EP0842349B1 (fr)
CN (1) CN1196771A (fr)
AU (1) AU708619B2 (fr)
CA (1) CA2228419A1 (fr)
DE (3) DE69607006T2 (fr)
PL (1) PL324866A1 (fr)
WO (1) WO1997005363A1 (fr)

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Publication number Priority date Publication date Assignee Title
US5833323A (en) * 1997-02-03 1998-11-10 Kennametal Inc. Cutting toolholder retention system
DE20320163U1 (de) * 2003-12-29 2004-03-04 Dbt Gmbh Meißelhalter für einen Hobelmeißel
US9028009B2 (en) 2010-01-20 2015-05-12 Element Six Gmbh Pick tool and method for making same
WO2011113113A1 (fr) * 2010-03-18 2011-09-22 Southern Engineering Pty Ltd Système de pic de coupe, d'usure et de montage pour machine minière
CN109025988A (zh) * 2018-08-28 2018-12-18 辽宁工程技术大学 一种新型可拆卸连续采煤机滚筒
DE102019008156A1 (de) * 2019-06-28 2020-12-31 Bomag Gmbh Fräsmeißel für eine Bodenfräsmaschine, Montageeinheit mit einem solchen Fräsmeißel und einer Spannschraube, Meißelhalter, Meißelhaltersystem, Fräswalze und Bodenfräsmaschine sowie Verfahren zur Montage eines Fräsmeißels in einem Meißelhalter

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US2036327A (en) * 1930-05-22 1936-04-07 Jeffrey Mfg Co Mining chain cutting bit
US2722410A (en) * 1953-03-12 1955-11-01 Goodman Mfg Co Mining cutter bit block
US2996291A (en) * 1957-05-16 1961-08-15 Cincinnati Mine Machinery Co Cutter bit and socket structures
FR1470059A (fr) * 1966-02-25 1967-02-17 Anderson Boyes & Co Ltd Perfectionnements aux pics de havage et aux porte-pics correspondants
CH537770A (de) * 1971-05-03 1973-06-15 Kaiser Heinz Ausdrehwerkzeug
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