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
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B10/00—Drill bits

Definitions

• the invention relates to a chisel holder system having a base part and a chisel holder, the base part having a plug-in receptacle into which the chisel holder is inserted with a plug projection, wherein the chisel holder is supported with a contact surface on a support surface of the base part, wherein the base part against the support surface, then having a shoulder, and wherein between the shoulder and a facing end surface of the chisel holder a Vietnamesesetzraum is formed.
• Such a bit holder system is known from DE 43 22 401 A1.
• This interchangeable holder system has a base part which can be welded, for example, on the lateral surface of a Fräswalzenrohres a road milling machine. It has a plug-in receptacle, in which a chisel holder with its Schafförmigen plug approach is used.
• the base part has a shoulder around the plug-in housing of the base part.
• the bit holder is arranged at a distance from the paragraph.
• the chisel holder is supported solely on the support surface of the base part for transmitting the forces during operation.
• the chisel holder represents a wearing part, which is replaced when the wear limit is reached.
• the base part on the other hand, must be protected against wear as far as possible, since it is the expensive part of the chisel holder system that can only be replaced with a high level of assembly work.
• the support surface is offset in the transition region to the paragraph by means of at least one recess of the paragraph that in the region of the depression, the sheet-like connection between the support surface and the paragraph is interrupted.
• the support surface With the depression, the support surface is delimited and created a defined support area. Should wear on the parts of the chisel holder system occur during operation, the depression prevents burr formation on the base part, because the chisel holder protrudes above the support surface on the recess with its contact surface and the support surface can not work into the support surface here. Thus, the support surface retains its shape and position. Once the bit holder is worn, it can be exchanged for a new one and this defined on the support surface to be supported again.
• the recess is formed like a groove and forms a recess extending in the direction vertical to the support surface.
• the depression can be easily finished.
• the depression in the groove bottom is rounded; so that the notch stresses introduced into the base part are minimized.
• the contact surface of the chisel holder projects beyond the support surface of the base part in the region of the depression and ends there, then it is ensured that the contact surface of the chisel holder always projects beyond the support surface in the region of the depression.
• a degree of formation on the base part is reliably prevented in a simple manner.
• the contact surface of the chisel holder projects beyond the support surface of the base part on all sides. In this way, the outline of the contact surface of the base part relative to the contact surface of the chisel holder is offset inwards. Should wear occur, the support surface will be incorporated into the bit holder and will remain intact. This embodiment also protects the support surface from scrap material that drains off the bit holder. This leaching to the support surface are safe and easily prevented.
• a preferred embodiment of the invention is such that the support surface of the base part is formed by a shoulder whose cross-sectional dimension running parallel to the support surface is smaller than or equal to the contact surface, at least in the area adjoining the support surface, so that the contact surface extends outside the heel in this region surmounted.
• the heel thus forms a wear area within which the support surface can be processed, but they always functionally support the bit holder. In this way, the service life of the base part can be maintained long.
• the plug-in receptacle of the base part for the plug attachment of the chisel holder extends into the area of the support surface, then it can be provided that the plug-in receptacle terminates at its end facing the bit holder in a cross-sectional widening, that the depression terminates in the region of this cross-sectional widening, and that the bit holder engages with a transition section in the cross-sectional widening, wherein the transition section leads the plug-in approach in the support surface.
• the transition region between the recess and the cross-sectional widening is optimally adapted to the dimensioning of the dimensions of the support surface in the region of the plug-in projection.
• bit holder has a lower hardness in the region of the contact surface than the support surface of the base part.
• Fig. 1 A base part of a bit holder system in side view
• Fig. 2 the base part acc. 1 in a perspective front view
• FIG. 3 is a side view of a bit holder of the chisel holder system
• FIG. 4 shows the bit holder of FIG. 3 in a perspective view from behind
• Fig. 5 is an assembly drawing with the components shown in FIGS. 1 to 4 and Fig. 6 is a marked in Fig. 5 with VI - VI cutting profile.
• FIG. 1 and 2 show a base part 10, which can be fastened with a curved connecting surface 11 on the outer circumference of a milling drum tube, for example a road milling machine.
• the base part 10 has a support surface 12 to which a paragraph 13 is connected at an angle.
• a plug-in receptacle 14 is introduced as a recess in the base part 10.
• the plug-in receptacle 14 runs out by means of a cross-sectional widening 14.1 in the support surface 12 or in the shoulder 13.
• the support surface 12 is supported by a shoulder 16.1.
• the shoulder 16.1 in the direction vertical to the support surface 12 has the same cross-sectional dimensioning as the support surface 12.
• the support surface 12 is closed by means of a recess 15.
• the recess 15 is arranged as a groove on both sides of the plug-in receptacle 14 and creates a spatial connection between the Querterrorismser- extension 14.1 and the paragraph 16.1.
• the groove depth is chosen so that it can detect the wear of the support surface 12 as a wear marker.
• FIGS. 3 and 4 show a bit holder 20, which has a base body 22.
• the base body 22 carries a downwardly directed contact surface 27.
• the front side is followed by an apron 28 on the base body 22.
• a plug-in extension 21 In the transition region between the base body 22 and the skirt 28, there is a plug-in extension 21 whose cross-section is adapted to that of the plug-in receptacle 14 of the base part 10.
• FIG. 4 reveals, the plug-in approach 21 by means of a transition section 21.2 in the contact surface 27 of the base body 22 and a final surface 28.1 of the skirt 28 on.
• the end portion 23 terminates with an annular bearing surface 25, in the center of a bit holder 26 is drilled.
• the end portion 24 is provided for wear detection with circumferential groove-like depressions 24.1.
• To stabilize the approach 23 and the improved outflow of waste material of the approach 23 is connected to the skirt 28 via a web-like Spanbrechner 29.
• the plug 21 is provided with a pressure surface 21.1.
• FIGS. 5 and 6 show the base part 10 and the bit holder 20 in the assembly position.
• the plug 21 is inserted into the socket 14.
• fastening screw which acts on the pressure surface 21.1 of the plug 21 and which is screwed into the screw 17 of the base member 10
• the bit holder 20 can be fixed to the base part 10.
• the contact surface 27 is supported on the support surface 12.
• the end face 28.1 stands for the formation of a Nachsetzraumes at a distance from the shoulder 13th
• the chisel holder 20 is, as shown in FIG. 6 clearly shows, circumferentially with its contact surface 27 via the support surface 12 via.
• the contact surface 27 closes in the region above the depression 15.

Landscapes

• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Life Sciences & Earth Sciences (AREA)
• Geology (AREA)
• Mechanical Engineering (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Environmental & Geological Engineering (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Percussive Tools And Related Accessories (AREA)
• Drilling And Exploitation, And Mining Machines And Methods (AREA)
• Road Repair (AREA)
• Cutting Tools, Boring Holders, And Turrets (AREA)
• Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
• Automatic Tool Replacement In Machine Tools (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

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ID=35668825

Family Applications (1)

Country Status (11)

Cited By (2)

Families Citing this family (35)

Citations (4)

Family Cites Families (9)

• 2005
  • 2005-01-26 DE DE102005003734A patent/DE102005003734B3/de not_active Expired - Fee Related
  • 2005-12-07 US US11/795,670 patent/US7784875B2/en not_active Expired - Fee Related
  • 2005-12-07 KR KR1020077015979A patent/KR100922176B1/ko not_active Expired - Fee Related
  • 2005-12-07 RU RU2007132199/03A patent/RU2360110C2/ru not_active IP Right Cessation
  • 2005-12-07 CN CN200580040093XA patent/CN101091037B/zh not_active Expired - Fee Related
  • 2005-12-07 AU AU2005325858A patent/AU2005325858B2/en not_active Ceased
  • 2005-12-07 WO PCT/EP2005/013073 patent/WO2006079389A1/de not_active Ceased
  • 2005-12-07 JP JP2007552516A patent/JP4709855B2/ja not_active Expired - Lifetime
  • 2005-12-07 BR BRPI0519944A patent/BRPI0519944B1/pt not_active IP Right Cessation
  • 2005-12-07 EP EP05825940.9A patent/EP1851411B1/de not_active Expired - Lifetime
• 2006
  • 2006-01-20 TW TW095102219A patent/TW200639319A/zh not_active IP Right Cessation

Patent Citations (4)

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