EP0841259A1 - Suspension element for tool with SDS-shaft - Google Patents

Abstract

The device has a suspension flap with a hole and an elastically deformable ring body to hold the tool shaft. The ring has an internal projection (13) and two or more opposite free spaces (20). The projection is wedge-shaped, and extends over all or part of the ring body length. The flap is connected via webs (15) to the ring body. The ring body also has additional raised parts (18) on the inside, which are smaller than the projection.

Description

The present invention relates to a suspension element for tools with an SDS shank according to the generic term of Claim 1.

The term SDS shaft is explained in advance. It is about a special shank of tools, e.g. Drill bits, milling cutters, chisels. etc, in a so-called SDS-plus recording or identical recordings can be introduced. The SDS shaft is essentially cylindrical and has two grooves parallel to the axis of the tool, that are opposite to each other, i.e. are offset by 180 °. These throats extend over a certain length of the Shaft and go at both ends over a curve in the Cylinder surface over. So you're at both ends closed.

Often the shaft is additionally with one or more Provide longitudinal grooves that extend into the end face of the Extend the shaft, i.e. they are open on one side. This Grooves also run parallel to the longitudinal axis of the Tool.

The cross-section of the throats is roughly arched or trough-shaped, while that of the grooves is approximately rectangular or trapezoidal.

For sale, these tools come in plastic bags packaged on a perforated tab on appropriate Porters can be hung in stores. This Plastic bags are known in a number of designs become.

A first pocket consists of a sleeve that holds the tool completely encloses. The material consumption is high, and the closure elements of the sleeve wear out quickly. A regular reuse is not possible.

DE-U 94 10 538.3 describes a suspension device for Grooved tools. It is both throats as well as from grooves on the shaft. DE-U 94 10 538.3 uses holding arms that engage the grooves and Retaining tabs that engage the throats. Arms and Retaining tabs are mounted on retaining clips, relatively rigid and spread when inserting the tool in the essential not on. When inserting and also when The hanging device is removed with the tool high effort deformed; the holding projections are used from. Regular reuse is not here either possible.

DE-A-195 17 519 is concerned with a holder for an object, the holder being an elastic ring having. This ring is on at least one section its circumference arched inward, this section can lie in a groove or throat of a shaft. This construction is already better than the one at the beginning suitable for regular reuse. The disadvantage, however, is that only certain shafts elastic deformation is possible, namely when the interior of the ring is not completely filled. However, there is then only an unsatisfactory mounting. It is further questionable whether the possible deformation at all for insertion or removal without damage of the ring or the inwardly projecting section is sufficient.

The object of the present invention is therefore a Hanging organ of the type mentioned above to train that reliable and sufficient elastic deformation is possible. A tool or a tool shank regularly without damage can be used and removed.

According to the invention, this task is achieved through technical teaching of claim 1 solved.

It is essential that the suspension element not only one elastic body with at least one, but preferably two Has protrusions on its inside, but also is provided with at least one free space, preferably several free spaces are used.

When inserting the shaft into the interior of the body this deforms elastically. The free spaces serve this purpose. The projections rest in the throats of the shaft. There these throats are closed towards the end of the shaft this securely holds the entire tool. A The protrusions are not damaged. The tool can be repeatedly inserted and removed without difficulty be without the quality of the bracket decreases.

For insertion, the tool is rotated so that the Engage protrusions in the upward open grooves. The The tool is then inserted and then turned. Here the body expands, the projections slide on along the outer circumference of the shaft and lie down finally in the throats. The body then springs elastic essentially back to its original shape.

The twill can be round, oval or polygonal. The protrusions can extend the entire length of the body extend or only part of the length. In the first case the protrusions are preferably on that of the hanging tab opposite side of the body, the bottom, chamfered, in second case is preferably approximately wedge-shaped.

The projections are preferably dimensioned so that they on the Hanging tabs facing side of the body, the top, a thickness of at least two and a half times the wall thickness of the body.

The free spaces preferably have a clear width of at least twice the wall thickness.

The connection is made to facilitate twisting between the hanging tab and the body via webs that extend at least to the middle of the body. This Bars are preferably offset by 90 ° to the free spaces arranged.

To compensate for tolerances on the shaft, the body can provided with a multitude of elevations on the inside be. These are small compared to the projections and as Knobs or the like are formed.

The dimensions of the body are preferably chosen so that its length is essentially the inside diameter in undeformed state. When using a angular body, the length preferably corresponds approximately to that Diagonals. For other body shapes, the length is the same about the average of the largest and smallest dimensions.

Since according to the invention that closely encloses the tool shank annular element as a sleeve-shaped, made of elastic Material manufactured body is formed in Hibernation, i.e. in the undeformed state, the hanging organ in two diametrical areas on the outside of the shaft surface each offers a free space that leads to the at least one in a throat in the tool shank engaging bracket are offset by 90 °, the sleeve-shaped body has the Possibility of inserting the tool shank deform elastically, i.e. its original shape Cancellation of the force causing the deformation to take. During this deformation, parts of the Inner wall surface of the sleeve-shaped body constantly with the Surface of the tool shank in the printing system, so that in the sleeve-shaped body there is a certain tension, that always have a tight fit of this body on the tool shank guaranteed. The deformation of the sleeve-shaped body will by inserting the tool's SDS shaft into it in two ways, namely a possibility for a machine or automated and a possibility for a manual Introduce what will be discussed later. The on the Inner wall surface of the sleeve-shaped body Bracket parts, the various configurations can then hold by snapping into the Tool shafts trained throats the tool firmly Hanging organ, the to the face of the Tool shank adjacent end portion of this shank protrudes beyond the upper edge of the sleeve-shaped body.

The subject matter of the present invention provides not just from the subject of each Claims, but also from the combination of individual claims among themselves.

All in the documentation, including the summary, Disclosed information and features, in particular those in the Drawings illustrated spatial training are considered essential to the invention, insofar as they are used individually or in Combination are new compared to the prior art.

In the following the invention based on several Drawings illustrating execution paths explained in more detail. Here go from the drawings and their description further features and advantages essential to the invention Invention.

Figur 1:

eine Ansicht des Aufhängeorgangs in einer ersten Ausführungsform;

Figur 2:

den Schnitt nach der Linie II-II in der Figur 1;

Figur 3:

eine Draufsicht auf das Aufhängeorgan im Stadium des maschinellen Einführens eines Werkzeugschaftes;

Figur 4:

den Schnitt nach der Linie IV-IV in der Figur 1 mit dem in das Aufhängeorgan gänzlich eingeführten und darin gehaltenen Werkzeugschaft;

Figur 5:

den Schnitt durch das Aufhängeorgan nach der Linie IV-IV in der Figur 1 ohne den Werkzeugschaft;

Figur 6:

einen in Höhe der Linie VI-VI in der Figur 1 gezogenen Schnitt mit eingeführtem Werkzeugschaft in einem Zwischenstadium zum Trennen von Aufhängeorgan und Werkzeugschaft;

Figur 7:

den Schnitt nach der Linie VI-VI in der Figur 1 mit eingeführtem Werkzeugschaft im Anfangsstadium zum Verbinden oder im Endstadium zum Trennen von Aufhängeorgan und Werkzeugschaft;

Figur 8:

eine Ansicht des Aufhängeorgans in einer zweiten Ausführungsform;

Figur 9:

einen Schnitt nach der Linie IX-IX in der Figur 8;

Figur 10:

den Schnitt nach der Linie X-X in der Figur 8 mit dem in das Aufhängeorgan gänzlich eingeführten und darin gehaltenen Werkzeugschaft;

Figur 11:

den Schnitt nach der Linie X-X in der Figur 8 ohne den Werkzeugschaft;

Figur 12:

den Schnitt nach der Linie XII-XII in der Figur 10;

Figur 13:

einen zur Figur 12 ähnlichen Schnitt in einem Zwischenstadium zum Trennen von Aufhängeorgan und Werkzeugschaft;

Figur 14 und 15:

zur Figur 9 gleichartige Darstellungen von abgewandelten Ausführungsformen von Halterungsteilen;

Fig. 16 bis 21:

weitere Ausführungsmöglichkeiten in ähnlicher Darstellung wie die Fig. 12, 13.

Show it:

Figure 1:

a view of the hanging organ in a first embodiment;

Figure 2:

the section along the line II-II in Figure 1;

Figure 3:

a plan view of the suspension member at the stage of the mechanical insertion of a tool shank;

Figure 4:

the section along the line IV-IV in Figure 1 with the tool shaft completely inserted and held in the suspension member;

Figure 5:

the section through the suspension element along the line IV-IV in Figure 1 without the tool shank;

Figure 6:

a section taken at the line VI-VI in Figure 1 with inserted tool shank in an intermediate stage for separating the suspension member and tool shank;

Figure 7:

the section along the line VI-VI in Figure 1 with inserted tool shank in the initial stage for connecting or in the final stage for separating the suspension member and tool shank;

Figure 8:

a view of the suspension element in a second embodiment;

Figure 9:

a section along the line IX-IX in Figure 8;

Figure 10:

the section along the line XX in Figure 8 with the tool shaft completely inserted into the suspension member and held therein;

Figure 11:

the section along the line XX in Figure 8 without the tool shank;

Figure 12:

the section along the line XII-XII in Figure 10;

Figure 13:

a section similar to Figure 12 in an intermediate stage for separating the suspension member and tool shank;

Figure 14 and 15:

9 shows similar representations of modified embodiments of mounting parts;

16 to 21:

further design options in a similar representation to FIGS. 12, 13.

The suspension element according to the invention has a plate-like Suspension bracket 1 with a suspension hole 2. At the Suspension tab 1 is a sleeve-shaped, at rest either a body with a circular cross-section 30 (Fig. 10-13) attached, the upper edge 4 and has a lower edge 5.

The hanging tab 1 of the hanging organ serves for the safe Holding the shaft 6 of a tool to be suspended, the is trained in an SDS-plus recording or similar recording of a work machine (one Power tool) to be attached. Such a shaft 6 has two diametrically and parallel to the longitudinal axis 14 of the Throats arranged throats 7 and at an angular distance this trained longitudinal seams 10. The throats 7 are in Cross-section is arched or trough-shaped and ends on both sides within the shaft via an upper or outer rounded end surface 8 and an inner or lower rounded End surface 9 by adding these surfaces 8 and 9 into the cylindrical Pass over the shaft surface as shown in FIGS. 4 and 10. The longitudinal grooves 10 have a rectangular or trapezoidal cross section and end on the one hand within the Shaft approximately in the area of the inner end face 9 of the Throats 7 and on the other hand in the end face 11 of the shaft 6, i.e. they are open in this face.

The ring-shaped, the tool shaft 6 closely surrounding Element is in the form of a sleeve-shaped body 3 or 30 from one elastic material formed. This body 3 or 30 has at least one on its inner wall surface Bracket part 13, which in one of the tool shank 6 designed throats 7 engages. Preferably that However, two such suspension element according to the invention Bracket parts 13 in a diametrical arrangement. At rest of the hanging organ, said body 3 or 30 has one circular or oval cross-section on two diametrical areas outside the peripheral surface of the Shank 6 with the inner wall surface of the sleeve-shaped body 3 or 30 at the full height H of the body mentioned forms a free space 20 to the at least one Bracket part 13 or to the two bracket parts 13 each have an angular distance of 90 °. These free spaces 20 allow an elastic deformation of the sleeve-shaped Body 3 or 30 under constant non-positive Pressure system from parts of the inner wall surface of this body the peripheral surface of the shaft 6.

The the sleeve-shaped body 3 in the embodiments of the Figures 1-9 and Figures 14 and 15 defining wall is on two diametrical places on the whole height H with one each cross-sectionally U-shaped bulge or fold 12 designed that includes the free space 20 and in Idle state of the suspension element of two spaced, opposite to each other and preferably to each other parallel wall surfaces are formed, as in the figures 2,9,14 and 15. The existence of each other opposite inner surfaces of the bulges 12 is in Hanger of the suspension element at least equal to that twice the wall thickness W (FIG. 5) of the sleeve-shaped body 3. The two diametrical points, which lead to the bulges 12 are spaced at 90 ° on the inner wall surface of the sleeve-shaped body 3 formed support parts 13th jump, which show Figures 4 and 5, in this case in Longitudinal section wedge-shaped and taper from the upper Edge 4 of the sleeve-shaped body 3 towards the lower edge 5. Furthermore, the two lateral edges or edges 19 run the bracket parts 13 in this embodiment from the top Edge 4 of the body 3 converging towards the lower edge 5 to each other, so that the mounting parts 13, as in Fig. 1st is shown, are lancet-shaped. The bottom end this lancet-shaped bracket parts 13 is stepless and smoothly over the inner wall of the sleeve-shaped body 3, and preferably in an area that extends from the lower edge 5 has a distance that is a quarter to a third of the Height H of the sleeve-shaped body 3 corresponds. About that upper edge 4 of the sleeve-shaped body 3 becomes a free Room 17 provided, in which the upper, free end of the Shank 6 with a certain freedom of movement when the Shaft is correctly received in the suspension element, as shown in Fig. 4 shows can occur.

The thickness of the lancet-shaped mounting parts 13 is upper edge 4 of the body 3 - measured in one of its Longitudinal axis 24 including plane - at least that two and a half times the wall thickness W of the body 3 by one secure support for the outer or upper end surface 8 of the To create throats 7.

The suspension bracket 1 is preferably connected to the webs 15 Outer surfaces of the bulges 12 or the bodies 3, 30 connected, these webs 15 at least in the middle of the Height H of the sleeve-shaped body 3.30 should end, as in Figure. 1 and 8, but preferably continues extend to the bottom 5 of the body 3.30 as they Grips for turning the sleeve-shaped body 3.30 form what will be discussed.

To compensate for small tolerance differences in the Shaft diameters can be on the inner wall of the sleeve-shaped Body 3 or 30 small bumps 18 in arbitrary Distribution trained.

The suspension element is made in one piece from an elastic deformable material made so that after picking up a pure deformation-causing force back to its original shape that it has at rest, strives to return.

To a tool shank when manually attaching the To hang up the hanging organ, the hanging organ is placed in the Figure 7 brought position, the lancet-shaped Bracket parts 13 with the longitudinal grooves 10 open at the end match, and then the shaft 6 in the sleeve-shaped body 3 inserted until the end face 11 of the shaft 6 projects beyond the upper edge 4, as shown in FIG. 4 shows the lower edge 16 of the hanging tab 1 as Stop for the end face 11 can serve. Subsequently becomes the suspension element, the webs 15 and / or the Suspension bracket 1 serve as handles, in the direction of Arrow A in Fig. 7 rotated so that the bracket parts 13 in engage the throats 7 and the state shown in Fig. 4 will be produced. To release the tool from the The suspension element becomes this in the direction of arrow B in FIG. 6 rotates around the mounting parts 13 into the longitudinal grooves 10 bring so that the tool shank without difficulty can be pulled out of the sleeve-shaped body 3.

3 shows an initial state in plan view an automated or mechanical attachment of the Hanging organ, whereby, for example, a pneumatic Device a pressure on the suspension element, the Bracket parts 13 in this case with the throats 7 agree, is exercised, which must be higher than one in the axial direction of the pressure to be applied by hand to achieve the Bracket parts 13 directly over the upper shaft end to insert the throats 7. The process of separating from The suspension element and tool are carried out manually, as above has been described in connection with FIG. 6.

As can be seen from the cross sections of FIGS. 3, 6 and 7, give the bulges or folds 12 to the sleeve-shaped body 3 such elasticity that means a deformation of cylindrical at rest Wall sections of this body 3 a narrow entry of the Bracket parts 13 in the longitudinal grooves 10 for slipping on sleeve-shaped body 3 over the shaft 6, a taut Turning the body 3 and ultimately a positive Engagement of the bracket parts 13 in the means of the End face 11 of the shaft 6 adjacent end face 8 completed throats 7, so that the shaft 6 of the Tools perfectly and safely in the hanging organ is held, but easily if necessary from the Hanging organ can be removed again.

In the embodiment shown in Figs. 10-13, the sleeve-shaped body 30 in the resting state of the hanging member in essentially an oval cross section, the free spaces 20 at two diametrical points of this body 30 as between the peripheral wall of the shaft 6 and the inner wall of the sleeve-shaped body 30 delimited crescent-shaped spaces are designed.

The function of this embodiment is essentially same as that in the case previously with reference to FIG. 1-7 embodiment described.

8 and 9 as well as in FIGS. 14 and 16 shown embodiments has the of Protruding inner wall surface of the sleeve-shaped body 3 Holding part 13 in the to the longitudinal axis 24 of this body rectangular cross section an arcuate configuration, whereas in the case of FIG. 14 the cross section is triangular, while in the case of the figure. 15 the mounting part 13 a has a rectangular cross section.

The projecting bracket parts 13 preferably merge a bevel or chamfer 26 that is close formed from the lower edge 5 of the sleeve-shaped body is in the inner wall surface over. This bevel or Chamfer 26 can also be directly from the lower edge 5 going out. In both cases, this will introduce the Tool shaft 6 favored in the sleeve-shaped body.

Preferably, that between the upper edge 4 of the sleeve-shaped body 3 or 30 and the lower edge 16 of the Suspension bracket 1 certain free space 17 dimensioned so that the tool picked up in the suspension element in the direction of its Axis 14 a certain freedom of movement of about 1 to 2 mm Has.

It has been shown that it is for the non-positive Pressure system of the sleeve-shaped body 3 on the Circumferential surface of the shaft and for stable mounting of the shaft in the sleeve-shaped body is advantageous if the distance of the mutually opposite inner surfaces of the U-shaped Bulges 12 at least when the suspension element is at rest equal to twice the wall thickness W of the sleeve-shaped body 3, 30, and preferably they are spaced opposite surfaces of the U-shaped Bulges 12 in the undeformed state of the suspension element parallel to each other.

For the axial extension H of the sleeve-shaped body 3 with at rest circular cross section is preferred that this is at least equal to its inside diameter undeformed condition of the suspension element.

The axial extent H of the sleeve-shaped body 30 with im Resting oval cross-section is preferably the measure of small oval axis in the undeformed state of the suspension element equal.

The latter two conditions guarantee one sufficient stability of the suspension element in comparison with only a narrow ring for the respective tools that are in Dependence of their diameters at the machining end in generally different shaft diameters, different Tool lengths and thus changing dimensions that from Hanging organ to be mastered.

16-21 are three further embodiments for the body 30a, 30b, 30c shown. There are two each Projections 13 are provided. The arrows show the deformation of the respective body 30a, 30b, 30c when the Shaft 6.

The invention thus a suspension element for Tools with a shank 6 for an SDS holder on one Working machine disclosed that a sleeve-shaped, on a plate-like suspension bracket 1 attached body 3 or 30th owns. The sleeve-shaped, cross-sectionally circular or oval body with Extensions 12 and 20 provided between the inner wall the body 3 or 30 and the peripheral surface of the Tool shank 6 create space and the sleeve-shaped Body 3.30 allow elastic deformation. On two diametrical, to the free spaces 20 spaced at 90 ° Stand on the inner wall of the sleeve-shaped body projecting bracket parts 13 formed with in Tool shaft 6 configured opposite the end face 11 of the shaft closed throats 7 come into engagement, so that the suspension element is firmly connected to the tool shank 6 is. By rotating the sleeve-shaped body 3 or 30 around Tool shank around we an entry or exit Bracket parts 13 into and out of the throats 7 of the shaft reached.

Drawing legend

1

Hanging tab

2nd

Hanging hole

3rd

body

4th

edge

5

edge

6

shaft

7

throat

8th

End face

9

End face

10th

Longitudinal groove

11

Face

12th

Bulge

13

Bracket part

14

Longitudinal axis

15

web

16

Lower edge

17th

room

18th

Survey

19th

Edge, edge

20th

free space

24th

Longitudinal axis

26

Chamfer

30th

body

Claims (11)

Suspension element for tools with an SDS shaft with at least two throats (7), which comprises: a hanging tab (1) with a hole (2), and an approximately annular body (3, 30) which is elastically deformable and suitable for receiving the SDS shaft (6) in its interior and is provided on its inside with at least one projection (13), characterized in that the annular body (3, 30) is provided with at least two essentially opposite free spaces (20). Suspension element according to claim 1, characterized in that the annular body (3, 30) is essentially round, oval or a polygon. Suspension element according to claim 1 or 2, characterized in that the at least one projection (13) extends over the entire length of the body (3, 30). Suspension element according to claim 1 or 2, characterized in that the at least one projection (13) is wedge-shaped and extends only over part of the length of the body (3, 30). Suspension element according to one of the preceding claims, characterized in that the at least one projection (13) is chamfered on one side. Suspension element according to one of the preceding claims, characterized in that the thickness of the at least one projection (13) on the side of the body (3, 30) facing the suspension tab (1) is at least two and a half times the wall thickness of the body (3, 30). Suspension element according to one of the preceding claims, characterized in that the clear width of the free spaces (20) corresponds to at least twice the wall thickness of the body (3, 30). Suspension element according to one of the preceding claims, characterized in that the suspension bracket (1) is connected to the body (3, 30) via webs (15) which extend at least to the center of the body (3, 30). Suspension element according to claim 8, characterized in that the webs (15) are offset by 90 ° with respect to the free spaces (20). Suspension element according to one of the preceding claims, characterized in that the body (3, 30) is additionally provided on its inside with a number of elevations (18) which are small compared to the at least one projection (13). Suspension element according to one of the preceding claims, characterized in that the body (3, 30) has a length which essentially corresponds to its inner diameter or the diagonal in the undeformed state.

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