DE202009017627U1 - Device for removing worn drill teeth or round shank bits on augers or buckets - Google Patents

Abstract

Device for removing worn drill teeth (22) or round shank bits on augers or buckets, consisting of a metallic guide rod (2) on which a striking weight provided with handle elements (4) is displaceably arranged and which is mounted on a baffle piece (3). sitting at one end of the guide rod (2) - acts, characterized in that at the other free end of the guide rod (2) from a two housing shells (10) existing hollow metal cylinder is mounted, wherein the housing shells (10) on a form and non-positively compressive actuator, can be opened and closed and the housing shells (10) front of the outwardly facing inside have a collar (13) which is positively and firmly in an adequate groove (14) of a drill tooth (22) or round shank chisel attachable.

Description

The The invention relates to a device for removing worn Drill teeth or round shanks on augers or -eimern

With In the present solution, the dismantling becomes worn down Drill teeth or round shank bits from z. B. cutting from augers - which are usually tough Made of steel - relieved by the over there a press fit in recordings einitzenden teeth or Round shank bit by axially acting on them blows be removed, the impact is safely dosed.

A lengthy processing with a hammer and chisel or others Impact tools eliminates this and it will be with it not to be underestimated risk of accidents avoided.

According to the known state of the art, drill teeth or round shank bits are also provided, with regard to their attachment possibility to drilling tools for earthworking, with means which form a positive connection at the base of a drill bit or round shank bit, whereby additionally securing fastening measures are carried out by laying a weld seam. Such a fastening z. B. a drill tooth is according to DE 87 16 925.8 U1 proposed.

Here has a drill tooth with wedge-shaped tooth part a polygonal Holding shank at whose end a recess is located, from the sideways protruding noses are present, behind the a cross bar engages, whereby positive locking in the drilling tool achieved becomes. The crossbars must during assembly / disassembly of the Noses are bent away laterally and it could be strong Wear of the drill shown here also necessary be able to grab behind the fret of the rake, but through the welded-in feed is eliminated.

at Not working the turn of the crossbars come in older Thus again the tools available on every construction site, namely hammer and chisel and possibly cutting torch, for use.

To DE 199 32 440 A1 a drill bit of a Erdbohrwerkzeuges is presented, which has a tooth cutting edge which is inclined outside the shaft centerline and the tooth cutting itself has a transverse bore into which a stick-shaped tool for the purpose of assembly / disassembly can be used. Apart from the fact that the tooth cutting edge is weakened statically by the transverse bore, in particular during disassembly blows must be exerted on the stalk-shaped tool, which are directed by the lever action radially on the central axis of the shaft. An easy removal of such a trained drill tooth from the drilling tool is thus not given and it causes injury hazards.

Out the prior art exemplified can be seen that there are different types of z. B. drill tooth attachment, each requiring special, especially disassembly techniques. at Very strong wear of the drill teeth can also damaged the form-locking fasteners or the Bohrzahnschneiden do not provide sufficient attack point more for a disassembly tool.

These Disadvantages it is necessary to overcome by a device which regardless of the degree of wear on a Tooth or on a round shank picking allowed.

It is therefore an object of the invention to propose a device, with a worn drill tooth or a round shank chisel at its periphery between the neck of the drill bit and the then the following shaft force and positively detected is achieved by dividing housing shells of a hollow steel cylinder, which are in operative connection with each other and thereby the steel cylinder defined at the side of its bottom opens and closes, engage according to the tongue and groove principle in an annular groove, the divided Housing shells on an axially holding guide rod are attached and sliding a weight on it centric is present, which unfolds its impact against a flapper. This is tasked, independent the geometry of a drill tooth and its state of wear, an exactly axial acting force introduced into the shaft can be, in which the drill tooth after a few strokes of Schlaggewicht is relaxed.

The Facility should face harsh site conditions robust and inexpensive and easy to manufacture be.

The The object of the invention is achieved as follows, with respect to the fundamental inventive idea of the features of the protection claim 1 is referenced.

The Further embodiment of the invention is in the protection claims 2 to 7 set forth.

The stripping device consists of a few compact metallic individual elements, wherein a central guide rod, consisting of round steel or from a provided with another geometric cross section solid material at one end a metallic baffle and at its other end a thread with screwed up to a stop connecting means and the latter are used for locking a attachable to the guide rod metallic steel cylinder, which is formed by two longitudinally split housing shells. The cylindrical, longitudinally split housing shells have such a design that they maintain their parallel position guided by a spaced them on one side metallic, cylindrical solid body and at its or the open end of the hollow steel cylinder formed by firmly or loosely connected to them actuators defined can be opened or closed.

The Housing shells have near their opening one on its inner wall attached waistband, the congruent into an annular groove at the transition between the tooth cutter and the drill stem of a drill tooth when passing through an appropriate actuator getting closed. Unintentional opening of the housing shells and thus slipping off of a detected drill tooth, without to have to use more tools by manually easily manageable form and adhesion or only form-fitting effecting Adjusting means / control elements prevented.

A indirect impact on a drill tooth for its removal from a recording of a Erdbohrwerkzeuges, z. Ex. From the cutting edge an auger, is exercised by a solid, centrally provided with a through hole Schlaggewicht is slidably mounted on the guide rod while his Impact action against a baffle piece, the on the opposite side of the guide bar is unfolded.

The Impact weight is two steps to its operation and with a staggered by 90 ° to them carrying handle, for Transport of ready for installation, equipped.

The Puller is extremely low maintenance and wear resistant.

The Invention will be described below with reference to embodiments be explained in more detail.

It will do that on the 1 to 3 resorted. They show:

1 : An overall perspective view of the puller

2 : A hollow metallic steel cylinder for the puller with force and form-fitting deliverable housing shells

3 : A hollow metallic steel cylinder for the puller with positively deliverable housing shells

The Reference numerals used are the separate list of reference numerals refer to.

The peeling device 1 exists according to 1 from a guide rod carrying all components 2 on one side with a baffle piece 3 concludes, with the baffle piece 3 a larger cylindrical diameter than the guide rod 2 has. At the baffle piece 3 opposite side is on the existing round solid material guide rod 2 a thread applied by a stop 7 - For defined screwing on two locknuts 8th - is limited. Between the thread and the stop 7 as well as the impact piece 3 is one on the guide rod 2 Sliding weight applied 4 available, that by handles 5 against the baffle piece 3 , when mounting the device to a drill tooth 22 , is feasible.

At the thread of the guide rod 2 is one of two housing shells 10 existing steel cylinder 9 attached, the formation of the latter according to 2 such is that the two cylindrical housing shells 10 via a thumbscrew 11 , approximately in the middle of the housing shells 10 passing, moving toward or away from each other. A cylindrical spiral spring 12 ensures a preload of the force and formschlüssig händelbaren housing shells 10 , One of the housing shells 10 has the exact parallel guide both at the top of a cylindrical solid body 15 with a central bore with internal thread 16 , so that by means of the latter the split steel cylinder 9 to the guide rod 2 can be mounted.

For detecting a groove 14 at the drill tooth 22 has each housing shell 10 on the outwardly facing end of its cylindrical inner surface a collar 13 on.

In a modified training, which arises from the housing shells 10 existing steel cylinders 9 to 3 represents.

In place of the thumbscrew 11 here takes over the deliverability of the housing shells 10 a comprehensive this holding cylinder 20 holding the housing shells 10 positively holds together from the outside. To prevent its sliding off the surface of the housing shells 10 they each have a stop on their outer surface at the opening side 21 ,

One of the housing shells 10 again has egg on the opposite side of the opening NEN permanently attached cylindrical solid body 15 with an outwardly facing head piece 18 , in which a fork-shaped counterpart engages, so that thus a joint 17 is formed. After dissolution of the holding cylinder 20 are the housing shells 10 can be opened up to 180 °.

At the headpiece 18 of the joint 17 there is a hole with internal thread 19 for fastening the steel cylinder 9 on the guide rod 2 ,

A bunch 13 is adequate to 2 at the opening side of the steel cylinder 9 on the inside of the housing shells 10 appropriate.

• – Verschleiß- und wartungsfreie Ausführung,
• – Unkomplizierte und unfallsichere Handhabung,
• – Kein Einsatz von zusätzlichen Werkzeug (Hammer, Meißel, Schneidbrenner) erforderlich,
• – Einfache, kostengünstige Herstellung.

The advantages of the invention can be summarized in:

• - Wear and maintenance-free design,
• - uncomplicated and accident-proof handling,
• - No use of additional tools (hammer, chisel, cutting torch) required,
• - Simple, inexpensive production.

1

printer machine

2

guide rod

3

impact element

4

impact weight

5

handle

6

handle

7

attack

8th

locknut

9

steel cylinder

10

shell

11

Tommy screw

12

spiral spring

13

Federation

14

groove

15

full body

16

drilling with internal thread

17

joint

18

headpiece

19

drilling with internal thread

20

holding cylinder

21

attack

22

Drilling tooth (Indicated)

23

connecting element with internal thread

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 8716925 U1 [0004]
• - DE 19932440 A1 [0007]

Claims (7)

Device for removing worn drill teeth ( 22 ) or round shank bits on augers or buckets, consisting of a metallic guide rod ( 2 ), on a provided with handle elements impact weight ( 4 ) is arranged displaceably and, on an impact piece ( 3 ) - sitting at one end of the guide rod ( 2 ) - characterized in that at the other free end of the guide rod ( 2 ) one of two housing shells ( 10 ) existing hollow metal cylinder is mounted, wherein the housing shells ( 10 ) via a positive and non-positive compressive actuator, can be opened and closed and the housing shells ( 10 ) at the front of the outwardly facing inside a waistband ( 13 ), which positively and firmly into an adequate groove ( 14 ) of a drill tooth ( 22 ) or round shank chisel is attachable. Device for removing worn drill teeth ( 22 ) or round shank bits according to claim 1, characterized in that on the guide rod ( 2 ) facing the end of the metal cylinder and there in one of the two housing shells ( 10 ) a cylindrical solid body corresponding to about one third of the length of the metal cylinder ( 15 ), which has a central threaded bore ( 16 ) into which an external thread of the free end of the guide rod ( 2 ) intervenes. Device for removing worn drill teeth ( 22 ) or round shank bits according to claim 2, characterized in that the housing shells ( 10 ) in its parallel position by means of a guided through their walls via a bore tommy screw ( 11 ) at the covenant ( 13 ) are defined or closed. Device for removing worn drill teeth ( 22 ) or round shank bits according to claim 2 and 3, characterized in that the toggle screw ( 11 ) in the interior between the housing shells ( 10 ) with a spiral spring ( 12 ) is in operative connection and externally on the second opposite housing shell in a fixedly mounted on the lateral surface thereof connecting element with internal thread ( 23 ) can be screwed. Device for removing worn drill teeth ( 22 ) or round shank bits according to claim 1, characterized in that the housing shells ( 10 ) of the metal cylinder by 180 ° by means of a fork-shaped joint ( 17 ) sitting at the outwardly facing end of the inside cylindrical solid body ( 15 ), are designed hinged. Device for removing worn drill teeth ( 22 ) or round shank bits according to claim 1 and 5, characterized in that an outside on the cylindrical outer surface of the housing shells ( 10 ) of the metal cylinder slidably formed holding cylinder ( 20 ) is arranged, which in closed housing shells ( 10 ) on rounded stops ( 21 ), each mounted below and outside on the lateral surface, supported. Device for removing worn drill teeth ( 22 ) or round shank bits according to one of the preceding claims, characterized in that the metal cylinder is secured by counter-linkable means ( 8th ) with the free end of the guide rod ( 2 ) and thus a change of the same is given in variable Bohrzahnumfangen.