CN1712159A

CN1712159A - Cutting tool with inserting end

Info

Publication number: CN1712159A
Application number: CN 200510079060
Authority: CN
Inventors: K·维尔纳; B·维尔纳
Original assignee: Hilti AG
Current assignee: Hilti AG
Priority date: 2004-06-24
Filing date: 2005-06-22
Publication date: 2005-12-28
Also published as: DE102004030430A1

Abstract

The invention relates to a tool. The tool has a tool shank (2), a tool head (3), and an insert end (4) including a cylindrical bearing surface (8) and two slots. The two slots run axially and lie opposite to one another. The tool shank is connected non-detachably with the insert end and a radial adapter sleeve. A spherical segment (10) is provided tangentially between the slots. The cross-section of the tool shank is smaller than the cross-section of the insert end. - An INDEPENDENT CLAIM is also included for a tool kit.

Description

Cutter with insertion end

Technical field

The present invention relates to a kind of cutter, the fluted drill of using as metal or timber, comprise an insertion end, be used to be installed in the knife rest that the partial rotation at least of hand held power machine drives, especially in the building industry in the knife rest of rotary impact type cordless power tool by other working methods as the combination hammer.

Background technology

The fried dough twist that metal that common only rotation drives or timber are used is drilled with simple columniform insertion end, is used for being clamped in the pawl formula dop force-closedly.This type of insertion end is not suitable for transmits big moment of torsion, in addition, they with market on pandemicly have for example not matching of rotation transmission lath and at least one lock body that can radially move by the shock machine knife rest of DE 2551125.

Press WO 02064295, only the insertion end of the cutter that drives of rotation has the rotation driving groove of a distolateral opening and one to be applicable to the ball groove that axially is locked at the tangential annular in the knife rest by the lock body that can radially move, and it also can only be designed to single secant shape ball groove by selection.This insertion end weakens also thereby has the breakaway poing of a regulation at ball trench bottom cross section.In addition, pandemic shock machine knife rest by DE 2551125 does not match on it and the market.

Press US 4184692, only the insertion end of the cutter that drives of rotation has a plurality of being applicable to by the lock pearl that can radially move to be locked at ball-and-socket in the knife rest vertically on a complete columniform insertion end.This insertion end is bearing in its end face axial in the knife rest.In addition, this Tool Design that has knife bar and be designed to the insertion end of adapter is that two parts are formed and detachably are not connected to each other.Because the moment of torsion transmission is only undertaken by ball-and-socket, therefore especially ball-and-socket rapid wearing in the many building industries of foul, and in addition compare with the lock body that can move radially, the service life of the shock machine knife rest of employing ball is shorter.

By DE 2551125 cutter of an insertion end is arranged as starting point of the present invention, one long knife bar, one are arranged in cutter distolateral cutter head and a insertion end in the machine side, the rotation driving groove that the guiding face, two that insertion end has a cylindrical sleeve shape extends vertically along diameter opposite end side opening and become two tangential axial locked grooves that close along diameter opposite end side seal between them with it, they are designed to axial ball groove.The axial restraint of cutter in the knife rest of attaching troops to a unit both do not stipulated can not realize yet.

Summary of the invention

The objective of the invention is to realize a kind ofly to be applicable to the many building industries of foul, can bear high load and with the insertion end of cutter that is used for only rotating driving of popular shock machine knife rest coupling.

This purpose mainly reaches by the feature of claim 1.Provide favourable further developing by dependent claims.

Therefore, cutter has a long knife bar, one in cutter distolateral cutter head and the insertion end in the machine side, it has the guiding face and the rotation driving groove at least two distolateral openings and that open wide at diametrically opposite, that extend vertically of at least one cylindrical sleeve shape, wherein, between the rotation driving groove, tangentially there is at least one ball-and-socket.

By these two distolateral openings and that open wide at diametrically opposite, the rotation driving groove that extends vertically and tangentially be located at ball-and-socket between them, insertion end is engaged in pandemic shock machine knife rest that a lock pearl that radially embeds arranged according to DE 2551125, and can be fixed in the ball-and-socket vertically by ball-and-socket type sealing ground.Therefore, a cutter that only drives around axis rotation also can be clamped in this shock machine knife rest vertically regularly, and the working method that conforms with purpose that can utilize only rotation to drive.

Advantageously, there are at least two, therefore, are designed to paired rotational symmetric insertion end ergonomics and advantageously can insert by two Rotate 180s ° position of staggering with respect to knife rest at diametrically opposite ball-and-socket.

Advantageously, ball-and-socket is disembarked the average distance of end face of device side in 0.7 to 1.3 scope of the guiding diameter of the guiding face of insertion end, therefore, have under the situation of enough big end play, reach the sufficiently stable locking of insertion end at impact transfer device from the shock machine knife rest.

Advantageously, have knife bar and a Tool Design that is designed to the insertion end of adapter and be that two parts are formed and mutually for example by friction welding (FW) or cold pressing and be connected non-disconnectablely, therefore, the cutter that especially has a simple cylindrical insertion end can be made the cutter with an insertion end that matches with the shock machine knife rest economically.

Advantageously, a plurality of adapters constitute an adapter packs, and it has the identical insertion end of guiding diameter that is used for the different cutter of knife bar diameter, therefore can make the cutter of the one group of different knife bar diameter that is used for a shock machine knife rest economically.

Description of drawings

Describe the present invention in detail by an advantageous embodiments below.Accompanying drawing is represented:

Two partial cross sectional views of Fig. 1 a and Fig. 1 b cutter;

The partial cross sectional views of Fig. 2 remodeling; And

A kind of remodeling of Fig. 3.

The specific embodiment

Press Fig. 1 a and Fig. 1 b, only the cutter 1 that drives around axis A rotation has the insertion end 4 of a long spirality knife bar 2, a cutter head that cutter is distolateral 3 and a machine side.In the shock machine knife rest 5 that dots in order to pack into two rotation transmission lath 6a, 6b and the lock pearl 7 that can radially move, be designed to paired rotational symmetric insertion end 4, have guiding face 8 and two identical, distolateral openings of shape and rotation driving groove 9a, the 9b opposed, unlimited along diameter, that extend vertically of a cylindrical sleeve shape.Between rotation driving groove 9a, 9b tangentially central authorities exist two shapes identical, along the opposed ball-and-socket 10 of diameter.When length L was five times of insertion end 4 guiding faces 8 guiding diameter F, the disembark average distance X of device side end face 11 of ball-and-socket 10 was 0.85 times of guiding diameter F.The radius R of ball-and-socket 10 is 1/3rd of guiding diameter F, and the radial distance Z between two ball-and-sockets 10 is 1/2nd of guiding diameter F.Cutter 1 is designed to comprise two part compositions of knife bar 2 and the cover tubular adapter 12 that is designed to insertion end 4, and is connected to each other by an adapter sleeve 13 that radially centers on knife bar 2 non-disconnectablely.The diameter D of knife bar 2 is less than the guiding diameter F of insertion end 4.

Press Fig. 2, be designed in the cutter 1 with cover tubular adapter 12 that an insertion end 4 constitutes dimerous at one, the diameter D of knife bar 2 is greater than the guiding diameter F of insertion end 4 guiding faces 8.Sleeve diameter H is 1.4 times of diameter D, and connection length V vertically is the twice of guiding diameter F.

Press Fig. 3, there have the cutter 1 of diameter D to be designed to be all-in-one-piece, and length L is that the insertion end 4 of five times of guiding face 8 guiding diameter F with respect to radially sinking of knife bar 2 with dwindling.

Overview diagrams 1a, 2 and 3 has the different cutter 1 of knife bar diameter D of the insertion end 4 of identical guiding diameter F to be designed to set of knives, and wherein, different adapters 12 constitute an adapter packs, are used for the different cutter 1 of knife bar diameter D.

Claims

1. cutter, comprise that a long knife bar (2), one are in a distolateral cutter head of cutter (3) and an insertion end in the machine side (4), insertion end has the guiding face (8) and the rotation driving groove (9a, 9b) at least two distolateral openings and that open wide at diametrically opposite, that extend vertically of at least one cylindrical sleeve shape, it is characterized by: tangentially have at least one ball-and-socket (10) between rotation driving groove (9a, 9b).

2. according to the described cutter of claim 1, it is characterized by: have at least two in diametrically opposite ball-and-socket (10).

3. according to claim 1 or 2 described cutters, it is characterized by: ball-and-socket (10) is disembarked the average distance (X) of end face (11) of device side in 0.7 to 1.3 times of scope of the guiding diameter (F) of the guiding face (8) of insertion end (4).

4. according to the described cutter of one of claim 1 to 3, it is characterized by: knife bar (2) and an insertion end (4) that is designed to adapter (12) are designed to two parts and are connected non-disconnectablely mutually.

5. according to the set of knives of the described cutter of claim 4, it is characterized by: a plurality of adapters (12) constitute an adapter packs, and it has the identical insertion end (4) of guiding diameter (F) that is used for the different cutter of knife bar diameter (D).