EP0469356B1 - Porte outil pour des marteaux perforateurs - Google Patents
Porte outil pour des marteaux perforateurs Download PDFInfo
- Publication number
- EP0469356B1 EP0469356B1 EP91111530A EP91111530A EP0469356B1 EP 0469356 B1 EP0469356 B1 EP 0469356B1 EP 91111530 A EP91111530 A EP 91111530A EP 91111530 A EP91111530 A EP 91111530A EP 0469356 B1 EP0469356 B1 EP 0469356B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool holder
- shank
- hammer drill
- slip
- tool receptacle
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/005—Attachments or adapters placed between tool and hammer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
Definitions
- the invention relates to a tool holder according to the preamble of claim 1.
- a tool holder which can be coupled as an attachment with a rotary hammer, is known from DE-PS 36 37 354. In this case, only the striking movement is transmitted to the tool holder. Rotary drilling is therefore not possible with this tool holder.
- the tool holders for grooved shank tools attached to rotary hammers are also not suitable for precise rotary drilling due to the wear on the mounting holes during hard impact operations. Because of the poor concentricity, the quality of holes, for example in metal, is mostly unsatisfactory.
- the tool holder according to the invention with the characterizing features of claim 1 has the advantage that exact round bores can be made with a hammer drill even when the tool holder is knocked out. For this purpose, the transmission of the hammer action is suppressed and the tool holder is attached to the clamping neck of the hammer drill.
- An in An extension to the tool holder of the hammer drill and connected to the rotary drive of the hammer, in particular a three-jaw chuck, ensures exact concentricity of the drilling tool used.
- the mounting of the shaft of the tool holder corresponding to a drilling spindle via two spaced roller bearings further contributes to a quiet and exact concentricity of the drill chuck.
- the shaft sits with play in the tool holder of the rotary hammer, so that concentricity inaccuracies are compensated for.
- the tool holder is quick and easy to assemble and disassemble. All usual additional devices such as additional handle can be attached to the clamping neck of the tool holder, which has the same diameter as that of the rotary hammer.
- FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
- the figure shows a longitudinal section through a hammer drill with a tool holder attached.
- the percussion mechanism 3 which is known per se, essentially consists of a rotary wobble finger 5 which drives a piston 6 back and forth.
- the striker 7 In the cup-shaped piston 6 there is a striker 7 which is accelerated forward by an air cushion formed between the piston and the striker in the direction of the tool holder 4.
- the striker 7 strikes another striking body, a striker 8.
- the striker 8 projects into the tool holder 4 and strikes the end of the shaft when the tool is inserted into the tool holder 4.
- the tool holder 4 has a receiving bore 10 in which two axially extending rotary driving bars 11 are arranged opposite one another. Otherwise, the tool holder corresponds to that from DE-PS 36 37 354. In particular, it also has spring-loaded locking bodies 12.
- a clamping neck 14 is arranged on the tool holder 4 on the housing 2 of the hammer drill.
- a tool holder 15 with its push-on part 16 made of plastic is placed on the clamping neck 14.
- the plug-on part 16 like the tool holder according to DE-PS 36 37 354, has a slot 17 and can be firmly clamped onto the clamping neck 14 by means of a clamping screw, not shown, reaching through a bore 18.
- two roller bearings 20, 21 are arranged at a distance from one another in the area in front of the tool holder 4. The distance between the roller bearings 20, 21 is determined by a spacer sleeve 22.
- a shaft 24 is mounted in the roller bearings 20, 21 and engages with one end 25 in the tool holder 4.
- the shaft 24 has, as a means for rotational driving, two opposite rotational driving grooves 26, in which the rotary driving bars 11 engage. Otherwise, the shaft end 25 has a cylindrical cross section, so that in particular the locking body 12 does not engage in the shaft end 25.
- the shaft end 25 is only so far in the tool holder 4 that it can no longer be reached by the striker 8 in its foremost position.
- the shaft 24 carries a thread 27 onto which a commercially available drill chuck is screwed.
- the drill chuck 28 can in particular be designed as a three-jaw chuck into which drilling tools can be clamped exactly centrally.
- a clamping neck 29 is formed on the plug-on part 16 of the tool holder 15 in the area of the roller bearings 20, 21, and its diameter corresponds to that of the clamping neck 14 of the rotary hammer.
- the tool holder 15 transmits the rotary movement of the tool holder 4 of the rotary hammer via the rotary driver bars 11 and the rotary driver grooves 26 to the shaft 24 and further to the drill chuck 28.
- the striking movement of the striking mechanism 3 is not transmitted to the tool holder 15.
- the tool holder 15 is axially fixed on the clamping neck 14 of the hammer drill. Any wear on the receiving bore 10 has no effect on the concentricity of the drill chuck 28, since the shaft 24 sits in the receiving bore 10 with play. This is achieved in that the shaft end 25 has a slightly smaller diameter than the tool shanks usually used in the tool holder 4.
- the concentricity of the drill chuck 28 is rather ensured by the tight fit of the plug-on part 16 on the clamping neck 14 of the hammer drill.
- the invention is not limited to the exemplary embodiments shown.
- the means for rotary driving as different, e.g. B. not diametrically opposed but otherwise associated grooves or formed as strips.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
- Jigs For Machine Tools (AREA)
Claims (7)
- Porte-outil avec une partie emboîtable (16) à fixer sur un collier de serrage d'un marteau perforateur (14),pour l'accouplement sur un raccordement d'outil (4) destiné à des outils à tige rainurée du marteau perforateur et avec une tige (24) s'insérant dans le raccordement d'outil (4) du marteau perforateur, caractérisé en ce que :- la tige (24) est montée et peut tourner dans la partie emboîtable (16), et elle a des moyens (26), qui servent à l'entraînement de rotation en étant en prise avec le raccord d'outil (4) et- la longueur de la tige (24) est déterminée de façon qu'elle ne soit en aucun cas en contact avec les corps de percussion (7, 8).
- Porte-outil selon la revendication 1, caractérisé en ce qu'il a un mandrin de perçage (28) relié solidaire en rotation avec la tige (24).
- Porte-outil selon les revendications 1 ou 2, caractérisé en ce que la tige (24) est supportée dans la partie emboîtable par deux paliers à roulement (20, 21) situés à une certaine distance l'un de l 'autre.
- Porte-outil selon une des revendications précédentes, caractérisé en ce que la tige (24) a des rainures longtudinales (26) pour l'enclenchement dans des nervures d'entraînement de rotation (11) du raccordement d'outil (4) du marteau perforateur.
- Porte-outil selon une des revendications précédentes, caractérisé en ce que la tige (24) est montée avec du jeu dans l'alésage (10) du raccordement d'outil (4) du marteau perforateur.
- Porte-outil selon une des revendications précédentes, caractérisé en ce que la partie d'emboîtement (16) est en matière plastique.
- Porte-outil selon une des revendications précédentes, caractérisé en ce que la partie d'emboîtement (16) a de préférence au niveau des paliers à roulement (20, 21) un collier de serrage (29) de même diamètre que le collier de serrage (14) du marteau perforateur.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9011315U DE9011315U1 (de) | 1990-08-02 | 1990-08-02 | Werkzeughalter für Bohrhämmer |
DE9011315U | 1990-08-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0469356A1 EP0469356A1 (fr) | 1992-02-05 |
EP0469356B1 true EP0469356B1 (fr) | 1993-10-20 |
Family
ID=6856142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91111530A Expired - Lifetime EP0469356B1 (fr) | 1990-08-02 | 1991-07-11 | Porte outil pour des marteaux perforateurs |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0469356B1 (fr) |
JP (1) | JP3100681B2 (fr) |
DE (2) | DE9011315U1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19604169A1 (de) * | 1996-02-06 | 1997-08-07 | Bosch Gmbh Robert | Halterung eines Zusatzgeräts für Handwerkzeugmaschinen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3241528C2 (de) * | 1982-11-10 | 1986-04-10 | Eugen Lutz GmbH u. Co Maschinenfabrik, 7130 Mühlacker | Werkzeugspannfutter für einen Bohrhammer |
DE3515661A1 (de) * | 1985-05-02 | 1986-11-06 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Elektropneumatischer drehschlagbohrhammer |
DE3637354A1 (de) * | 1986-11-03 | 1988-05-05 | Bosch Gmbh Robert | Werkzeughalter |
-
1990
- 1990-08-02 DE DE9011315U patent/DE9011315U1/de not_active Expired - Lifetime
-
1991
- 1991-07-11 DE DE91111530T patent/DE59100501D1/de not_active Expired - Fee Related
- 1991-07-11 EP EP91111530A patent/EP0469356B1/fr not_active Expired - Lifetime
- 1991-07-30 JP JP03189678A patent/JP3100681B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH04360740A (ja) | 1992-12-14 |
DE9011315U1 (de) | 1991-11-28 |
EP0469356A1 (fr) | 1992-02-05 |
DE59100501D1 (de) | 1993-11-25 |
JP3100681B2 (ja) | 2000-10-16 |
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