EP1726405A1 - Système d'outillage pour le remplacement d'une bougie de préchauffage d'un moteur diesel - Google Patents

Système d'outillage pour le remplacement d'une bougie de préchauffage d'un moteur diesel Download PDF

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Publication number
EP1726405A1
EP1726405A1 EP06009797A EP06009797A EP1726405A1 EP 1726405 A1 EP1726405 A1 EP 1726405A1 EP 06009797 A EP06009797 A EP 06009797A EP 06009797 A EP06009797 A EP 06009797A EP 1726405 A1 EP1726405 A1 EP 1726405A1
Authority
EP
European Patent Office
Prior art keywords
receiving bore
glow plug
clamping sleeve
sleeve
tool
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.)
Withdrawn
Application number
EP06009797A
Other languages
German (de)
English (en)
Inventor
Horst Klann
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.)
Klann Spezial Werkzeugbau GmbH
Original Assignee
Klann Spezial Werkzeugbau 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 Klann Spezial Werkzeugbau GmbH filed Critical Klann Spezial Werkzeugbau GmbH
Publication of EP1726405A1 publication Critical patent/EP1726405A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0035—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for motor-vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/06—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53987—Tube, sleeve or ferrule

Definitions

  • the invention relates to a tool system for exchanging a glow plug of a diesel engine consisting of a plurality of tools, by means of which a stuck into an internal thread of a receiving bore of a cylinder head of the diesel engine screwed, defective glow plug from the receiving bore is removable, wherein the glow plug in a radially enlarged, cylindrical recess of Receiving bore of the cylinder head is arranged.
  • glow plugs are used in diesel engines. These glow plugs are firmly screwed into a receiving bore of a cylinder head of the diesel engine. The glow plugs protrude through the cylinder head into the respective associated combustion chamber, so that it can be preheated by the glow plug in case of need before the start of the diesel engine. In the region of the combustion chamber end, the glow plugs have a heating element which projects at least minimally into the combustion chamber of the respective cylinder of the diesel engine.
  • This heating element is received by a mounting tube, which in its, the heating element opposite End area is provided with a mounting thread.
  • the receiving bore of the cylinder head in its axially outer end region on a corresponding internal thread into which the mounting tube with its mounting thread can be screwed.
  • the receiving bore in this case has towards the combustion chamber towards a radially tapered portion through which a sealing seat is formed.
  • the mounting tube of the glow plug is adapted to this remote training the receiving bore and has in corresponding axial arrangement on a circumferential sealing surface, with which the mounting tube when screwing tightly comes to rest on the sealing seat of the receiving bore.
  • the mounting tube is provided with an integrally formed hexagon outside axially of the mounting thread, so that the glow plug by means of a conventional socket wrench in the receiving bore or its internal thread can be screwed.
  • a contact pin is used for electrical connection, which has a contact element on the outside. After shearing the external hexagon, it is now necessary to put this contact pin together First remove with the contact element to remove the hexagon socket from the rest of the mounting tube can.
  • a conventional socket is normally used, which is pressed or whipped onto the contact element, wherein this contact element thereby assumes the contour of the socket.
  • the socket can be designed as an inner torx or hexagon socket.
  • the mounting thread is now drilled with a so-called. Kernlochbohrer, whereby the mounting thread of the mounting tube is removed, possibly without damaging the internal thread of the mounting hole. Subsequently, in the rest of the mounting tube, an internal thread can be cut by means of a conventional tap, and pulled out by means of a pulling spindle or the like. Subsequently, the internal thread of the cylinder head is to be reworked by means of a corresponding tap in order to use a new glow plug can.
  • the receiving bore can be provided to free the receiving bore prior to insertion of the new glow plug by means of a reamer of combustion residues or other impurities, such as oxidation products, so that the receiving bore assumes at least approximately its original condition.
  • the invention has the object to design a tool system such that a precise alignment of the individual, necessary to replace the glow plug tools such as core drills, taps or reamers is precisely on the longitudinal center axis of the receiving bore possible.
  • the object is achieved in that an insertable into the recess clamping sleeve is provided in which the concentric alignment of the individual tools, a centering sleeve is inserted, and that the clamping sleeve for fixed, clamping holder of the centering sleeve can be pressed into the recess.
  • the inventive design a tool system is provided by means of which the individual, in particular for removing a defective glow plug required tools such as core drills, taps or reamers are extremely precisely aligned with the longitudinal central axis of the receiving bore for the glow plug.
  • the clamping sleeve is first inserted into a cylindrical recess of the receiving bore of the cylinder head.
  • Such cylindrical depressions are generally provided as radial extensions of the receiving bore in the axially outer region of the cylinder head.
  • the centering sleeve is inserted snugly into the clamping sleeve until it bears against the base of the radially widened recess of the receiving bore.
  • the centering sleeve on the clamping sleeve is already aligned coaxially or concentrically with the longitudinal center axis of the receiving bore.
  • the aligned concentric position of the centering sleeve is fixed in the cylindrical recess of the receiving bore.
  • the correspondingly necessary tool such as the core drill bit, can now be inserted into the centering sleeve and, for example, the mounting thread of the mounting tube of the glow plug can be drilled out.
  • a tap can now be used for regrooving the internal thread of the receiving bore in the centering sleeve.
  • the tap has a corresponding guide shaft over which it is guided in the centering sleeve with the least amount of play, so that a Coaxial reworking of the internal thread of the receiving bore is ensured.
  • the other, possibly for the post-processing of the receiving bore necessary tools, such as a reamer to remove combustion residues from the receiving bore can be used in the centering.
  • the tools such as the core drill, the tap or the reamer over the centering sleeve are absolutely concentric with the longitudinal central axis of the receiving bore aligned. Furthermore, it is ensured that a new glow plug to be used can be inserted absolutely concentrically into the receiving bore again.
  • the mounting tube of the glow plug can still remain during the Nachtexs the internal thread in the receiving bore.
  • the clamping sleeve has a conical outer surface, with which the clamping sleeve can be inserted into the recess and that the clamping sleeve has a concentric with its lateral surface arranged, cylindrical through-hole, the diameter of which is pressed into the recess of the receiving bore for clamping support and concentric alignment of the centering sleeve for receiving bore reduced.
  • Clamping sleeve forms a cone angle ⁇ of 1 ° to 10 °. Due to this extremely low cone angle, in particular a coaxial alignment of the clamping sleeve is ensured when pressed into the recess. Preferably, a cone angle of 2 ° can be provided here, so that the clamping sleeve aligns coaxially when pressed into the recess of the receiving bore.
  • the clamping sleeve in its, protruding from the recess end portion, a radially projecting coupling web, with which the clamping sleeve with a striking tool is positively engageable in engagement.
  • the impact tool according to claim 5 a base body with a movable on a slide bar Have impact weight.
  • the impact tool is designed as a kind of percussion hammer, which is positively connected via its base body with the coupling web of the clamping sleeve engageable.
  • the base body has a U-shaped recess with a receiving groove, with which the body is positively engageable with the coupling web of the clamping sleeve into engagement.
  • the centering sleeve 1 shows a perspective exploded view of a centering sleeve 1 together with a clamping sleeve 2.
  • the centering sleeve 1 has a cylindrical outer circumferential surface 3, with which the centering sleeve 1 in a cylindrical through hole 4 of the clamping sleeve 2 can be inserted.
  • the centering sleeve 1 is provided with a cylindrical through-hole 5, which serves to receive a tool.
  • the centering sleeve 1 is formed radially widened in the region of its upper end and provided with circumferential stop web 6, which serves as a stop when pulling out of the clamping sleeve 2 from a recess of a receiving bore for a glow plug.
  • the clamping sleeve 2 is of slotted construction and has a longitudinal slit 7 extending over the entire axial length thereof. Through this longitudinal slot 7 it is achieved that the clamping sleeve 2 can be pressed together, so that the inner diameter of the through hole 4 decreases during the pressing of the clamping sleeve in the mentioned recess. By this configuration, a clamping, tight fit of the centering sleeve 1 is achieved in the clamping sleeve 2 in use.
  • peripheral circumferential surface 8 of the clamping sleeve 2 is conical and forms a cone angle ⁇ of about 1 ° to 10 °, preferably 2 °, as shown in Fig. 1.
  • a circumferential, radially outwardly projecting coupling web 9 is provided on the clamping sleeve 2.
  • FIG. 2 shows a perspective view of a part of such a percussion tool 10.
  • This impact tool 10 has a slide bar 11 whose function will be explained in more detail later on FIG. 4.
  • This slide bar 11 is screwed into a base body 12, which has in its the slide bar 12 opposite lower end portion 13 extending over approximately half the axial length, laterally and downwardly open U-shaped recess 14.
  • This recess 14 forms a coupling portion of the base body 12, which has a U-shaped receiving groove 15 in its inner wall 16 in its lower end region.
  • the clamping sleeve 2 with its coupling web 9 fitting inserted, so that the clamping sleeve 2 axially fixed, positively connected to the base body 12 and its coupling portion 14 can be brought into engagement.
  • the clamping sleeve 2 in a corresponding bore on the one hand einpressbar and on the other hand in turn extendable.
  • Fig. 3 shows a second embodiment of a centering sleeve 20, which differs from the centering sleeve 1 of FIG. 1 only by the smaller inner diameter of its cylindrical through hole 21.
  • This centering sleeve 20 also has a cylindrical lateral surface 22, with which the centering sleeve 20 fits into the cylindrical through-hole 4 of the clamping sleeve 2 can be inserted.
  • the centering sleeve 20 in its upper end region also has a radially projecting stop web 23, on which the clamping sleeve 2 is present when pulling out of the clamping sleeve 2 from a bore, so that the centering sleeve 20 is uniformly extended over its stop web 23 with.
  • This centering sleeve 20 serves to guide a tool whose diameter is smaller than the diameter of such tools, which are to be used with the centering sleeve 1.
  • Fig. 4 shows the complete impact tool 10 with its slide rod 11 and its base body 12 in perspective Presentation.
  • the slide bar 11 and the base body 12 are shown shortened axially.
  • a handle portion 25 is screwed.
  • a Schlagis 26 is provided on the slide bar 11 between this handle portion 25 and the base body 12, which is displaceable along the slide bar 11 on the one hand in the direction of arrow 27 against the handle portion 25 and on the other hand in the direction of the arrow 28 down against the base body 12.
  • the clamping sleeve 2 is coaxial to the slide rod 11 extending into the receiving groove 15 so that the impact pulses are also introduced concentrically into the clamping sleeve two.
  • the collet can absolutely coaxially turn into corresponding hole or cylindrical recess.
  • FIG. 5 shows a vertical partial section of a cylinder head 30 together with a glow plug 31 in an exploded perspective view.
  • the cylinder head 30 has a receiving bore 32, which is provided in its upper end region with an internal thread 33. Above this internal thread 33, the receiving bore 32 is provided with a radially enlarged recess 34. In its lower end region, the receiving bore 32 is offset and has a radially tapered receiving channel 35. Thus, the receiving bore in the upper end region of this receiving channel 35 forms an annular sealing seat 36th
  • the glow plug 31 is inserted into the receiving bore 32 suitable.
  • the glow plug 31 has a cylindrical mounting tube 37, in whose upper end region a mounting thread 38 is provided. From the mounting tube 37 protrudes axially downwards protruding a heating element 39, which protrudes with its downwardly tapered end 40 during operation in the combustion chamber of a diesel engine or the cylinder of a diesel engine, at least partially.
  • an external hexagon 41 is integrally formed on the mounting tube 37.
  • the mounting tube 37 serves to receive a contact pin 42, which in Fig. 5 in dashed lines is shown.
  • This contact pin 42 connects the heating element 39 with a relative to the mounting tube 37 electrically insulated contact element 43.
  • the contact element 43 is via a press connection with the contact pin 42 in connection.
  • this contact element 43 has an axially upward projecting connecting pin 44, on which a corresponding contact plug can be plugged.
  • the glow plug 31 with its heating element 39 and the mounting tube 37 via the mounting thread 38 in the internal thread 33 of the receiving bore 32 can be screwed.
  • the outer hexagon 41 serves for firmly tightening the glow plug 31 in the receiving bore 32.
  • the heating element 39 is formed smaller in diameter than the mounting tube 37, so that between the heating element 39 and the mounting tube 37 a circumferential sealing surface 45 is formed. In the assembled state, this sealing surface 45 is pressed against the circumferential sealing seat 36 of the receiving bore 32, so that the glow plug 31 is tightly inserted into the receiving bore 32.
  • the diameter of the mounting tube 37 and the heating element 39 may be formed slightly smaller than the corresponding portions of the receiving bore 32 and the receiving channel 35. This has the consequence that, in particular in the region of the receiving channel 35 in which between the heating element 39 and the receiving channel 35th arising annulus combustion residues are deposited. This in turn leads to an extremely tight fit of the entire glow plug 31 in the receiving bore 32nd
  • the glow plug 31 can not be easily rotated out of the receiving bore 32 for replacement.
  • the external hexagon 41 above the mounting thread 38 on the mounting tube 37 shears, so that a complete removal of the glow plug 31 is not possible.
  • the contact element 43 is pressed by means of a press connection via sealing elements 46, which are electrically insulating, in the region of the external hexagon 41 in the mounting tube 37. Since now after shearing off the outer hexagon 41, the glow plug 31 can not be screwed out of the mounting hole 32 out, special measures are required.
  • FIG. 6 shows, first of all, a vertical partial section of the glow plug 31 inserted into the cylinder head 30 or its receiving bore 32.
  • the basic internal structure of the glow plug 31 can be seen essentially from FIG.
  • the heating element 39 is inserted into the mounting tube 37 and held there for example via a solder or press connection. It can also be seen that in this screwed into the receiving bore 32 state, the glow plug 31 is sealingly seated with its sealing surface 45 on the sealing seat 36 of the receiving bore 32.
  • the contact pin 42 is arranged, which is plugged into the heating element 39 within the mounting tube 37 in the schematic diagram of FIG. 6 electrically contacting.
  • a press connection od.
  • the contact pin 42 projects beyond the mounting tube 37 beyond its upper outer hexagon 41, so that the contact element 43 can be plugged onto this upper end of the contact pin 42 and fixed to this via a press connection.
  • this contact element 43 is pressed into the mounting tube 37 via the seals 46 in the region of the external hexagon 41.
  • the mounting tube 37 in turn sits with its mounting thread 38 in the internal thread 33 of the receiving bore 32, wherein the mounting thread 38 protrudes axially from the internal thread 33.
  • the lower end 40 of the heating element 39 protrudes from the cylinder head 30. In this lower end region is known, the combustion chamber of the diesel engine or a cylinder of the diesel engine.
  • annular spaces must be provided in order to avoid excessive heat transfer from the glow plug to the cylinder head when the glow plug is activated and thus to ensure the desired heating function of the glow plug in the combustion chamber. That is, the glow plug is usually in contact with the cylinder head only with the mounting thread 38 and the thick surface 45. Due to these narrow dimensions, these annular spaces are not visible in FIG. However, it is easy to imagine that in the annuli between the mounting tube 37 and the receiving bore 32 on the one hand and the receiving channel 35 and the heating element 39 on the other hand can collect combustion residues.
  • a socket with a small diameter is first opened on the contact element 43 so that its key profile is transmitted to the contact element.
  • the contact pin 42 is now turned off and can be removed.
  • the external hexagon 41 is removed, provided that it is not removed during the removal of the contact pin 42 together with the contact element 43. Now the mounting tube 37 is freely accessible from above.
  • the glow plug 31, in particular with its outer hexagon 41, is recessed in the radially widened recess 34 of the receiving bore 37.
  • this recess 34 is arranged concentrically to the longitudinal center axis 47 of the receiving bore 32 and formed cylindrical.
  • centering sleeve 1 and the clamping sleeve 2 of FIG. 1 are provided.
  • Fig. 7 shows the centering sleeve 1 and the clamping sleeve 2 in use.
  • the contact pin 42 is already removed together with the contact element 43 in FIG.
  • the sheared external hexagon 41 is already removed in Fig. 7.
  • the clamping sleeve 2 is inserted into the upper, radially enlarged recess 34 of the receiving bore 32.
  • the centering sleeve 1 is inserted and is with its lower end edge fitting and concentric with the longitudinal central axis 47 of the receiving bore 32 extending at the bottom 48 of the recess 34.
  • the clamping sleeve 2 Due to the extremely small cone angle ⁇ of at most 3 °, preferably 2 °, of the lateral surface 8 (FIG. 1) of the clamping sleeve 2, the clamping sleeve 2 is coaxial in the state shown in FIG. 7 and concentric with the longitudinal central axis 47 of the receiving bore 42 aligned.
  • FIGS. 8 to 12 show various tools which, depending on the application, can be used for removing the mounting tube 37 together with the heating element 39.
  • Kernlochbohrers 55 points this one guide shaft 56 which is bounded at the top by a radially expanded, circumferential stop web 57.
  • This stop web 57 serves as insertion limit and thus determines the maximum possible depth of the Kernlochbohrers 55th
  • the mounting tube 37 is drilled in the region of its mounting thread 38 on the core diameter, so that the remaining, sitting in the internal thread 33 of the receiving bore 32 thread segments fall out of this internal thread 33 after removing the Kernlochbohrers 55 or can be cut out by trimming.
  • the core drill bit 55 may also be provided with a cylindrical drive shaft for use with a drill or the like.
  • Fig. 9 shows a second tool in the form of a tap 65.
  • this tap 65 also has a guide shaft 66, by means of which is the tap 65 fits into the through hole 5 of the centering 1 used.
  • the tap 65 has at the upper end of its guide shaft 66 on a radially expanded stop ridge 67, which also serves as a limitation of the travel of the tap 65.
  • the tap is provided with a plurality of threaded cuts 68, by means of which the internal thread 33 of the receiving bore 32 can be recut.
  • the tap 65 is provided in the axial extension of its thread cutting 68 with a centering pin 69, via which the coaxial and concentric guidance of the entire tap 65 is improved to the receiving bore 32.
  • this centering pin 69 engages in the recutting of the internal thread 33 in the still in the receiving bore 32 seated mounting tube 37 with little play.
  • the tap 65 is provided with a drive hex 70.
  • FIG. 10 shows by way of example a second core drill 75, which also has a guide shaft 76, a stop ridge 77 and a drilling tool 78 with an axially projecting centering pin 79. Also, the core hole drill 75 is provided for the rotary drive in the present embodiment with a corresponding drive hexagon 80.
  • this tap 85 has a corresponding guide shaft 86 for coaxial and concentric guidance in the through hole 5 of the centering sleeve 1.
  • the guide shaft 86 is bounded on the upper side by a radially projecting stop web 87, by means of which the cutting depth during thread cutting is also limited.
  • this tap 85 close down to various taps 88, which are also in turn provided with a centering pin 89 in the axial extension.
  • the tap 85 has a corresponding drive hexagon 90 for the rotating drive.
  • the tool of FIG. 12 is to be used in conjunction with the second centering sleeve 20 of FIG. 3 in the present embodiment and axially shortened in FIG. 12 shown.
  • the tool of FIG. 12 is a so-called reamer, which serves for the post-processing of the receiving bore 32 starting from the internal thread 33 to the combustion chamber. Since firing residues occur in particular in the region of the receiving channel 35, they can be removed by means of the reamer 95.
  • the reamer 95 has in its upper end region on a guide shaft 96, which fits through the through hole 21 of the centering sleeve 20 in the insert hin manschiebbar.
  • the inner diameter in the present embodiment of this through hole 21 corresponds to the inner diameter of the not drilled receiving bore 32, so that there is necessarily a concentric alignment via the centering sleeve 20 and the receiving bore 32 itself.
  • the reamer 95 has a central cutting area 97 whose diameter corresponds to the guide shaft 96. Residues from the radially expanded portion of the receiving bore 32 can be removed by means of this cutting region 97. Furthermore, the reamer 95 is provided in the axial extension of this cutting region 97 with a radially tapered end portion 98, which is also designed as a cutting tool. The diameter of this end portion 98 corresponds to the nominal or the nominal diameter of the receiving channel 35, so that through this end portion 98 of the receiving channel 35 of the receiving bore 32 can be freed of fuel residues.
  • the reamer 95 has in the region of its upper end of the guide shaft 96 a radially expanded stop collar 99, through which the maximum drilling depth is defined in cooperation with the axial length of the centering sleeve 20.
  • 97 more cutting elements 100 are provided in the transition region between the lower end portion 98 and the cutting area, through which the sealing seat 36 of the receiving bore 32 can be reworked. This post-processing is done automatically at the end of the friction process, immediately before the reamer has reached its limited by the stop collar 99 drilling depth.
  • the reamer 95 also has a drive hexagon 101 at the upper end for its rotating drive.
  • FIG. 13 shows, by way of example, the use of the core hole drill 55 in cooperation with the centering sleeve 1 and the clamping sleeve 2. It can be seen that the core hole drill 55 with its guide shaft 56 fits snugly into the through hole 5 of the centering sleeve 1.
  • FIG. 13 shows the starting position of the core hole drill 55 immediately before the drilling operation. Furthermore, it can be seen from FIG. 13 that the drilling tool 58 forms a conical section 61 towards the centering pin 59, with which the core-hole drill 55 in the illustrated embodiment Starting position is present directly in the upper end of the mounting tube 37.
  • the centering pin 59 is additionally guided by the mounting tube 37 coaxially to the longitudinal center axis 47 of the receiving bore 32 in the present embodiment.
  • This configuration with the centering pin 59 is not absolutely necessary, but improves the safe handling of the Kernlochbohrers 55.
  • the Kernlochbohrer 55 is now drilled into the mounting tube 37, in which drilling the mounting tube 37 drilled becomes.
  • the diameter of the core hole drill 55 or of the drilling tool 58 is dimensioned such that the internal thread 33 of the receiving bore 32 is not damaged.
  • Fig. 14 shows the end of the drilling process in which the core hole drill 55 rests with its stop web 57 on the upper side on the radially projecting stop web 6 of the centering sleeve 1.
  • the axial length of the drilling tool 58 and the guide shaft 56 is dimensioned so that the mounting tube 37 is bored beyond the axial length of the internal thread 33 addition.
  • the threads of the mounting thread 38 initially remain in the threads of the internal thread 33.
  • the remnants of the mounting thread 38 can be removed from the internal thread 33 or fall independently into the mounting tube 37 inside.
  • FIG. 15 shows the starting position of the tap 65 immediately before the start of the Nachstens the internal thread 33 of the receiving bore 32. It can be seen from Fig. 15 that also the tap is inserted with its guide shaft 66 fits into the through hole 5 of the centering sleeve 1. The thread cutting 68 are located directly at the upper end of the internal thread 33 of the receiving bore 32. At the same time, the length of the centering pin 69 is dimensioned such that it protrudes into the mounting tube 37, as shown in FIG. 15 can be seen.
  • the tap 65 is aligned concentrically with the longitudinal central axis 47 of the receiving bore 32 via the centering sleeve 1 and the clamping sleeve 2.
  • the centering pin 69 is not absolutely necessary, however, simplifies the handling of the tap 65.
  • the length of the guide shaft 66 and the arrangement and length of the thread cutting 68 are chosen so that after complete insertion of the tap 65, the internal thread 33 is completely machined and recut.
  • the tap 65 can now be removed again. Subsequently the clamping sleeve 2 and the centering sleeve 1 are removed from the recess 34 of the receiving bore 32. This is again brought about the receiving groove 15 with the coupling web 9 of the clamping sleeve 2 into engagement and then the impact weight 26 in the direction of the arrow 27 (FIG. 4) moves against the handle part 25. As a result, impact pulses are effected in the withdrawal direction of the arrow 27, so that the clamping sleeve 2 is pulled out of the recess 34.
  • the clamping sleeve 2 beats with its coupling web 9 against the stop web 6 of the centering sleeve 1, so that it is pulled out at the same time or after complete removal of the clamping sleeve 2 can not accidentally fall.
  • an internal thread is now cut into the remaining in the receiving bore 32 mounting tube 37 by means of a conventional tap (not shown in the drawing), which serves for receiving, for example, a pulling spindle of a separate pulling device.
  • a pulling spindle of a separate pulling device By means of this pulling device is then the mounting tube 37 together with the heating element 39 completely extendable from the receiving bore 32. Since such pulling devices are generally known in the art, a detailed description will be omitted here.
  • FIG. 16 it can be seen, the second centering sleeve 20 of FIG. 3 together with the clamping sleeve 2 of FIG. 1 inserted into the recess 34.
  • the clamping sleeve 2 is inserted into the recess 34 and then the centering sleeve 20 is inserted into the clamping sleeve 2 to the bottom 48 of the recess 34 in the clamping sleeve 2.
  • a concentric and coaxial alignment with the longitudinal central axis 47 of the receiving bore 32 is achieved for the centering sleeve 20.
  • the reamer 95 serves to "rub out” both the receiving bore 32 and the receiving channel 35 and the sealing seat 36.
  • the length of the guide shaft 96 and the length of the cutting area 97, the cutting elements 100 and the end portion 98 is selected such that the receiving bore 32, the sealing seat 36 and the receiving channel 35 after processing again get their original shape of their new state.
  • the lengths of the individual sections of the reamer 95 and the arrangement of the stop collar 99 are selected such that such a production of the new state is ensured safe.
  • Fig. 16 shows the end position of the reamer at the end of processing.
  • a post-processing or removal of a glow plug is also possible with mounted cylinder head and built-in diesel engine, provided that allow space in the engine compartment and the arrangement of the glow plug in the cylinder head.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Drilling And Boring (AREA)
  • Automatic Assembly (AREA)
EP06009797A 2005-05-23 2006-05-12 Système d'outillage pour le remplacement d'une bougie de préchauffage d'un moteur diesel Withdrawn EP1726405A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200520008241 DE202005008241U1 (de) 2005-05-23 2005-05-23 Werkzeugsystem zum Austauschen einer Glühkerze eines Dieselmotors

Publications (1)

Publication Number Publication Date
EP1726405A1 true EP1726405A1 (fr) 2006-11-29

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EP06009797A Withdrawn EP1726405A1 (fr) 2005-05-23 2006-05-12 Système d'outillage pour le remplacement d'une bougie de préchauffage d'un moteur diesel

Country Status (4)

Country Link
US (1) US7484281B2 (fr)
EP (1) EP1726405A1 (fr)
BR (1) BRPI0601817A (fr)
DE (1) DE202005008241U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010011133U1 (de) 2010-08-06 2010-10-28 Werkzeug Pichler Gesellschaft M.B.H. & Co. Kg Vorrichtung zum Freilegen einer Führung für eine Glühkerzenausbohrvorrichtung

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006039296B3 (de) * 2006-08-22 2008-04-17 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Ausziehwerkzeug
BRPI0807186B8 (pt) * 2007-01-26 2021-06-22 Friadent Gmbh disposição com um instrumento para a preparação ou execução da inserção de um implante
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DE202008003045U1 (de) * 2008-03-04 2008-05-15 Klann-Spezial-Werkzeugbau-Gmbh Verstellbare Reibahle
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CN106078582A (zh) * 2016-08-29 2016-11-09 苏州市顺仪五金有限公司 一种可拆装式套筒
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BRPI0601817A (pt) 2007-02-13
US20060260110A1 (en) 2006-11-23

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