EP4348781A1 - Werkzeug zur entfernung eines dichtrings von einer zündkerze - Google Patents
Werkzeug zur entfernung eines dichtrings von einer zündkerzeInfo
- Publication number
- EP4348781A1 EP4348781A1 EP22718902.4A EP22718902A EP4348781A1 EP 4348781 A1 EP4348781 A1 EP 4348781A1 EP 22718902 A EP22718902 A EP 22718902A EP 4348781 A1 EP4348781 A1 EP 4348781A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spark plug
- cutting device
- tool
- receiving space
- sealing ring
- 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.)
- Granted
Links
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
- B25B27/0028—Tools for removing or installing seals
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
- H01T21/02—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs of sparking plugs
-
- 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
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
Definitions
- the present invention relates to a tool for removing a ring, in particular a metal sealing ring, from a spark plug, in particular a hook spark plug or a prechamber spark plug.
- FIG. 1 shows an example of a hook spark plug 10 with a center electrode 13 and a ground electrode 14.
- a housing 11 has an external thread 12 with which the spark plug is screwed into a threaded hole in the cylinder head or the like.
- Numeral 15 designates an electrical insulator.
- a shoulder 11a is arranged on the housing 11 between the external thread 12 and a tool attachment area 17 .
- a metal sealing ring 16 is provided on shoulder 11a, which, when the spark plug is screwed in, prevents gases from the combustion chamber from reaching the outside via a gap between the spark plug and the cylinder head.
- this metal sealing ring 16 When the spark plug is screwed into the cylinder head, this metal sealing ring 16 is often plastically deformed, which leads to an improved seal between the spark plug and the cylinder head. For example, during maintenance work, the spark plugs are unscrewed from the cylinder head and reused if necessary. The metal sealing ring 16 then has to be removed from the spark plug and replaced, which is often very difficult due to the deformation. In particular, care must be taken that the thread 12 of the spark plug is not damaged when removing the metal sealing ring 16. With the metal gasket removed, a new metal gasket can be slipped on and the spark plug screwed back into the cylinder head. So the Removal of the metal sealing ring is relatively expensive and often associated with damage to the spark plug, so that it cannot be reused. It would therefore be desirable to have a tool that facilitates the removal of the metal sealing ring from the spark plug.
- the tool according to the invention for removing a metal sealing ring from a spark plug with the features of claim 1 has the advantage over the prior art that the metal sealing ring can be removed from the spark plug quickly and easily. There is no risk of the spark plug being damaged by the process of removing the metal sealing ring, so that the spark plug can be reused after a new metal sealing ring has been fitted.
- the tool has a housing with a receiving space for receiving the spark plug.
- the housing includes an open longitudinal side on which the receiving space is exposed and is set up to insert the spark plug into the receiving space via the open longitudinal side.
- the tool includes a support device which protrudes into the receiving space.
- the support device is arranged in such a way that an inserted spark plug with a metal sealing ring lies in the receiving space in such a way that the metal sealing ring rests at least partially on the support device in the axial direction of the tool.
- the tool comprises a cutting device which can be moved in the receiving space in the axial direction of the tool. A gap is formed between the cutter and the support for receiving the metal sealing ring of the spark plug.
- the tool also includes an actuating device which can be actuated by hand and is operatively connected to the cutting device in order to carry out the axial movement of the cutting device in the receiving space.
- the cutting device During the axial movement of the cutting device, it is moved axially into the gap between the cutting device and the support device in which the metal sealing ring lies in order to axially cut the metal sealing ring.
- This is possible because the metal sealing ring is supported on the supporting device on the one hand and is divided from the other side by means of the cutting device. This allows the metal sealing ring to be removed from the tool after the spark plug has been removed be easily removed from the spark plug, or the individual parts of the metal sealing ring simply fall off.
- the actuating device preferably has a lever which is operatively connected to the cutting connection. This significantly reduces the force required to divide the metal sealing ring, since the lever increases the force according to the law of the lever when the tool is actuated.
- the cutting device comprises a base element on which at least one cutting edge is arranged.
- the base element ensures that the axial movement of the cutting device can be carried out safely. If the cutting device has exactly one cutting edge, only one slit is made in the metal sealing ring after the tool has been actuated. As a result, removing the metal sealing ring from the spark plug after removing the spark plug is somewhat cumbersome.
- the cutting device therefore preferably has two or three or four cutting edges. The metal sealing ring is then divided into two, three or four parts accordingly. This makes it easy to remove the split metal sealing ring from the spark plug or it will automatically fall off the spark plug after the splitting process.
- the base element comprises a ring on which the cutting edges are arranged.
- the cutting edges are preferably arranged on the outer circumference of the ring.
- the blades of the cutting device are arranged to be interchangeable. As a result, the cutting edges can be replaced after a certain period of use if they have become blunt through use.
- the actuating device comprises a first guide element articulated to the lever and a cylinder with a tapered end. That I tapered end of the cylinder is in contact with the first guide element. Furthermore, the cylinder element is in operative connection with the cutting device. Thus, by actuating the lever, the first guide element is moved axially, which transmits the movement to the cutting device via the cylinder.
- the design of the cylinder with a tapering end ensures that the cutting device can move axially even if there is a certain amount of play in the individual parts of the actuating device.
- the actuating device also includes a second guide element, which is arranged between the cylinder and the cutting device.
- a connecting element is particularly preferably provided, which is arranged on the second guide element and is in operative connection with the base element of the cutting device.
- the tool also includes a reset element, which automatically resets the actuating device and the cutting device to the initial state.
- the restoring element is preferably integrated into the actuating device, in particular between the cylinder and the second guide element.
- the restoring element is preferably a spring, in particular a cylinder spring, with the second guide element preferably having a spring receptacle.
- the housing includes an outlet opening in the axial direction, from which an inserted spark plug partially emerges into the environment.
- an axial length of the tool can be reduced and in particular spark plugs with different axial lengths can be machined with the same tool without any problems in order to remove the respective metal sealing rings on the spark plugs.
- the accommodating space of the tool can be made relatively large, since it is not necessary for the spark plug to support itself on the accommodating space on one side, but it is sufficient for the removal of the metal sealing ring if the metal sealing ring is supported on the support device.
- the receiving space preferably has a shoulder, so that the receiving space essentially corresponds to an outer contour of the spark plug.
- the housing preferably has a recess on an outside for receiving the lever.
- a holding device can also be provided for the lever so that it remains positioned in the recess on the outside of the housing.
- the holding device can be, for example, an undercut or a clipping of the lever into a correspondingly designed holding device.
- the tool according to the invention can be used with all types of spark plugs, in particular hook spark plugs and prechamber spark plugs.
- the body of the tool is preferably made of a metal material.
- Figure 1 is a schematic, only partially sectioned view of a
- FIG. 2 shows a schematic, perspective view of a tool according to the invention with a spark plug inserted into the tool
- Figure 3 is a schematic side view of the tool of Figure 2
- Figure 4 is a schematic partial sectional view of the tool of
- a tool 1 according to a preferred exemplary embodiment of the invention is described in detail below with reference to FIGS.
- the tool 1 is able to safely remove the metal sealing ring 16 arranged on a spark plug in FIG.
- the metal sealing ring 16 can also be plastically deformed and be connected very firmly to the spark plug.
- FIG. 2 shows the inserted state of the spark plug 10 in the receiving space 3.
- the housing 2 has an open longitudinal side on which the receiving space 3 is exposed and is set up so that the spark plug 10 can be inserted into the receiving space 3.
- the housing 2 has an exit opening 30 in an axial direction X-X, from which the spark plug 10 partially exits the tool 1, as shown in FIG.
- This outlet opening 30 enables the tool to be suitable for spark plugs with a wide variety of geometric dimensions.
- the receiving space 3 also includes a step 31, so that the receiving space essentially corresponds to an outer contour of the spark plug.
- the tool 1 also includes a support device 4 which protrudes into the receiving space 3 .
- the support device 4 can also be seen in detail in FIG.
- the support device 4 is a ring-shaped disk that protrudes into the receiving space 3 and is firmly connected to the housing 2, for example via a welded connection.
- the support device is designed in one piece with the housing 2 .
- the support device 4 is set up so that when the spark plug is inserted, the metal sealing ring 16 to be removed bears against the support device 4 on one side.
- the tool 1 also includes a cutting device 5 which can be moved in the receiving space 3 in the axial direction XX of the tool.
- the cutting device 5 In the starting position shown in FIG. 4, the cutting device 5 is arranged in such a way that a gap 8 is formed between the cutting device 5 and the supporting device 4 .
- the metal sealing ring 16 is positioned in this gap 8 when the spark plug is inserted. This is indicated in FIG. 4 by the metal sealing ring 16 shown in dashed lines.
- the tool 1 comprises an actuating device 6 which can be actuated by hand.
- the actuating device 6 is operatively connected to the cutting device 5 in such a way that an axial movement of the cutting device 5 in the receiving space 3 can be carried out.
- the cutting device 5 is moved into the gap 8 in order to axially divide the metal sealing ring 16 . This is indicated by the arrow A in FIG.
- the actuating device 6 comprises a lever 60 which can be actuated by hand and which is articulated on the housing 2 of the tool.
- the joint 65 is shown schematically in FIG.
- the actuating device 6 also includes a first guide element 61 which is guided so as to be axially movable in the receiving space 3 .
- the actuating device 6 comprises a cylinder 63 with a tapered end 63a.
- the tapered end 63a is in contact with the first guide member 61.
- the other end of the cylinder 63 is formed with a flange 63b for receiving one end of a return member 7 therein.
- the actuating device 6 also includes a second guide element 62, through which a rod 64 is guided.
- a spring retainer 64a which is in contact with the other end of the return element 7 is arranged on the rod 64 .
- the rod 64 is firmly connected to a cutting plate 51 of the cutting device 5, for example by means of a welded connection, in order to transmit the axial movement to the cutting device 5.
- On the blade plate 51 are four bars
- the blades 50 are on an outer periphery of the ring
- a width of the cutting edges 50 is equal to or greater than a width of the metal sealing ring 16 in order to ensure that it is completely divided.
- the restoring element 7, which is a cylinder spring in this embodiment, is part of the actuating device 6.
- the actuating force, which is exerted via the lever 60, is thus transmitted via the first guide element 61, the cylinder 63, the restoring element 7, the rod 64 Cutting plate 51, the rods 52 and the ring 53 transferred.
- the cutting device 5 is pressed in the direction of arrow A against the metal sealing ring 16, which is supported on the support device 4, and is divided when the appropriate force is applied.
- the return element 7 is rigidly connected to the cylinder 63 on the one hand and to the rod 64 on the other hand.
- a metal sealing ring 16 can be safely separated from a spark plug 10 by cutting.
- the cutting device 5 has two cutting edges 50 .
- the receiving space 3 has approximately the shape of an outer contour of the spark plug. Due to the support device 4, which is essentially U-shaped in order to enable lateral insertion of the spark plug into the tool, the spark plug with metal sealing ring 16 can be safely inserted into the tool in such a way that the metal sealing ring 16 fits into the gap 8 between the Cutting device 5 and the support device 4 is positioned.
- the gap 8 is chosen so that metal sealing rings of different thicknesses can be inserted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Spark Plugs (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021205445.5A DE102021205445A1 (de) | 2021-05-28 | 2021-05-28 | Werkzeug zur Entfernung eines Dichtrings von einer Zündkerze |
| PCT/EP2022/058137 WO2022248101A1 (de) | 2021-05-28 | 2022-03-28 | Werkzeug zur entfernung eines dichtrings von einer zündkerze |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4348781A1 true EP4348781A1 (de) | 2024-04-10 |
| EP4348781B1 EP4348781B1 (de) | 2025-02-26 |
Family
ID=81387317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22718902.4A Active EP4348781B1 (de) | 2021-05-28 | 2022-03-28 | Werkzeug zur entfernung eines dichtrings von einer zündkerze |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240238951A1 (de) |
| EP (1) | EP4348781B1 (de) |
| CN (1) | CN117461228A (de) |
| DE (1) | DE102021205445A1 (de) |
| WO (1) | WO2022248101A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024205580A1 (de) * | 2024-06-17 | 2025-12-18 | Robert Bosch Gesellschaft mit beschränkter Haftung | Vorrichtung und Verfahren zum Entfernen eines Dichtungsringes von einem Injektor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3401445A (en) * | 1967-04-10 | 1968-09-17 | Robinair Mfg Corp | Grappling device |
| US4211446A (en) * | 1978-09-27 | 1980-07-08 | Shultz William E | Seal puller |
| US4502197A (en) * | 1983-03-22 | 1985-03-05 | Harder W Dale | Seal retainer installing and removing tool |
| DE102009044925B4 (de) | 2009-09-23 | 2013-10-31 | Wezag Gmbh Werkzeugfabrik | Handwerkzeug und Handwerkzeug-Set |
| DE102015205774B3 (de) | 2015-03-31 | 2016-09-08 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zum Entfernen von lsolationsresten von einer Zündkerze, Verwendung eines Isolationsresteentfernungswerkzeugs und Isolationsresteentfernungswerkzeug |
| DE102015221394B4 (de) * | 2015-11-02 | 2024-02-01 | Robert Bosch Gmbh | Zündkerze mit erhöhtem Anzugsdrehmoment und Brennkraftmaschine |
| DE102017205285A1 (de) | 2017-03-29 | 2018-10-04 | Robert Bosch Gmbh | Vorrichtung zum Einstellen des Elektrodenabstandes von einer Zündkerze sowie Verfahren hierfür |
-
2021
- 2021-05-28 DE DE102021205445.5A patent/DE102021205445A1/de active Pending
-
2022
- 2022-03-28 EP EP22718902.4A patent/EP4348781B1/de active Active
- 2022-03-28 WO PCT/EP2022/058137 patent/WO2022248101A1/de not_active Ceased
- 2022-03-28 US US18/563,798 patent/US20240238951A1/en active Pending
- 2022-03-28 CN CN202280038219.3A patent/CN117461228A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20240238951A1 (en) | 2024-07-18 |
| EP4348781B1 (de) | 2025-02-26 |
| CN117461228A (zh) | 2024-01-26 |
| WO2022248101A1 (de) | 2022-12-01 |
| DE102021205445A1 (de) | 2022-12-01 |
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