WO2006021561A2

WO2006021561A2 - Coaxial coupling

Info

Publication number: WO2006021561A2
Application number: PCT/EP2005/054140
Authority: WO
Inventors: Ufuk Uyar
Original assignee: Ufuk Uyar
Priority date: 2004-08-24
Filing date: 2005-08-23
Publication date: 2006-03-02
Also published as: WO2006021561A3

Abstract

According to the invention, a coaxial coupling may be formed, which can be connected as a quick coupling with the same calibre, of application for rotating or oscillating tools, preferably as hand tools for the cutting of cooked meat (Gyros/Kebabs), whereby at least one permanent magnet (13, 23) is provided on the cylindrical projection (11), or in the base of the hollow cylindrical housing (21), cooperating with the counterpiece such that both are drawn towards each other by means of a magnetic interaction. Furthermore, one of the coupling pieces is embodied as a driving piece (40) and the other as a tool head (50), whereby a detachably coupled drive shaft transmits the rotating or oscillating movement to the tool and a motor (42) is provided as drive and a rotating blade (64) as tool.

Description

Coaxial coupling

The invention relates to a coaxial coupling according to the preamble of the independent claim; it also relates to the use of such coaxial couplings as a handheld device with drive housing and tool head.

With coaxial couplings can be made connections, such as hoses or a tool head, attached to a handpiece whose drive cooperates, for example, a running through the handpiece, connectable to a flexible shaft drive shaft or arranged in the handpiece drive motor with the tool head , The cooperating coupling parts generally have cylindrical projections which are inserted in substantially form-fitting, hollow-cylindrical receptacles and fixed there.

The assembled coupling parts are thereby defined by Rast¬ or screw means or by spring force to each other and pressed against each other. Such coaxial couplings do not have the same caliber throughout, so that there are paragraphs that are conditional on the handling, for example handpieces composed of handpiece and tool head, as known from DE 10107000, DE 29502942, GB 2273650 or GB 2238229 Doner or gyro knives. The disadvantage is that it is time-consuming to separate and assemble such couplings or change the head of the tool, and the handling of such two-part hand tools, for example for cleaning, needs improvement. [0004] Hence, the object of the invention is to propose such a coaxial coupling, which can easily be joined together as a quick coupler with a uniform caliber that can be produced economically, and which avoids these disadvantages; in continuation of the task this coaxial coupling should be used for rotating or oscillating tools and finally in training in a hand-held device, in particular for cutting roast meat (gyros / doner).

This object is achieved by the characterizing features of the independent claims; Advantageous developments and preferred embodiments describe the respective, dependent claims.

To set the two coupling parts together, at least one permanent magnet is provided on the cylindrical projection or in the bottom of the hollow cylindrical receptacle, which pulls together with a ferromagnetic counterpart cooperating both parts by magnetic forces against each other. The ferromagnetisehe counterpart can also be formed by a permanent magnet arranged opposite to one another. The co-operating magnets enhance the attraction effect and the coaxial coupling is largely released by the use of the second permanent magnet in terms of material selection. Since the magnetic forces already act on the mating of the coupling parts, the coupling parts are automatically pulled into the final position after a more or less deep biting. A flat contact of the end faces is not required; Air gaps can easily be tolerated. With the pole strengths of modern permanent magnets made of metal oxide-ceramic-like materials, sufficient force effects are also achieved.

In an advantageous development, guide means are provided either on the gegenü¬ berliegenden faces of magnet and counterpart or counter magnet or on the outside of the cylindrical projection and on the inside of the hollow cylindrical receptacle with which a helical rotary motion is enforced when joining, the is guided over at most 360 °, preferably at most over 120 °, and which corresponds to the movement on a (tortuous) inclined plane, with a predetermined by the end position of the guide means Endposi¬ tion. This also facilitates the release of this coaxial coupling against the magnetic forces: the mutually interacting surfaces are twisted against each other with little effort and thus ent removed from each other, wherein the magnetic force between them decreases.

In a first embodiment, waves or teeth with radially aligned ridges and valleys in the end faces of the magnet th and the opposite end face this guide means. When assembled, the crests of one side lay in the valleys of the other side. To release both coupling parts are rotated against each other; In this case, the combs slide out of these valleys, as a result of which the directly adjoining surface parts are reduced and the spacing of the separate surface parts is increased, which reduces the magnetic forces and facilitates the release of the coupling.

[0009] In a second embodiment, at least one threaded passage and a threaded ridge piece engaging in this passage form these guiding means, which, acting together under the action of the magnetic forces, cause (in some cases even automatic) twisting during assembly, the end position This thread guide positioned the attachment part relative to the base part. In the same way, it is also possible to provide a plurality of threaded ridges and correspondingly a plurality of threads, which are advantageously rotationally symmetrical in order to facilitate positioning during application and biting off from different starting positions. A non-rotationally symmetrical arrangement of thread ridges or radial pins allows an assembly of the two parts of the coaxial coupling in unmistakable position. In a further development, a radial pin is provided as a threaded ridge piece, which engages in a thread formed as a spiral guide groove. Here, the end of the guide represents the end position determining stop, so that here is the possibility of accurate positioning is given. A twisting of the coupling parts for releasing results in an increase in the distance via the guide, which reduces the magnetic forces and thus facilitates the disengagement of the coupling.

This coupling thus found allows such a quick connection and a quick release. As a result, it can be used in many ways, for example as a closure for chains and bracelets, as a coupling for diving equipment and devices of underwater technology, for mechanical and chemical apparatus construction, in aerospace, robotics and weapon technology, for camping equipment and furniture fittings. for medical / dental devices and aids. For tools, the attachment part can be removed as a tool head and cleaned separately. The base part containing the drive motor can be sealed by plug-on or screw-on caps and thus also cleaned by rinsing.

In a first embodiment, the base part and the attachment part of the coaxial coupling are designed as hollow cylinders and at the free ends provided with connection means for pipe or hose. This allows the coupling of hoses through which gases or liquids are passed. To seal the end face side between the outer End¬ rings of the coupling parts or between the inner annular surfaces of the hollow cylinder or the hollow cylindrical recess radial seals, or alternatively, between the cylindrical surfaces arranged axial seals, such as O-rings or lip seals provided.

In a second embodiment, the base part forms a drive part and the attachment part a tool head of a driven hand-held device. The drive acts e.g. a flexible shaft on an intermediate shaft mounted in the drive housing, which transmits the rotational movement to the tool head. Alternatively, a drive motor is arranged in the drive housing, whose rotary motion is transmitted to the tool head. The rotational movement puts the tool used in rotating or oscillating motion. Motor shaft and drive shaft are connected via a plug-in coupling, which allows for the separation of the housing, the easy separation of the motor and drive shaft.

If the drive motor as a low-voltage motor with a Strömversor¬ supply via a screwed or verrenkbarem plug connection ausgebil¬ det, the connection cable can be removed from the drive housing and replaced by a cap for about necessary cleanings. Advantageously, the motor is actuated via a switch lying substantially flush in the outer surface of the drive housing, preferably designed as a membrane switch. As a result, this outer surface can be kept very smooth, which is particularly important if the hand tool thus formed is used in areas with increased hygienic requirements - for example in the food industry.

An additional, the attitude of the handset recognizing Nei¬ supply switch can switch on in the intended position - for example, in a horizontal position - allow for vertical attitude - such as changing the tool head - but lock. If the inclination switch is designed to distinguish between the tool head "vertically upwards" and "vertically downward", this allows, for example, in the "upwards" position the change of the tool head and in the position "downwards" its cleaning in a bath , which is particularly effek¬ tive when in position "down" the engine in a wash program - such as with fast interval rotation of the circular blade - can be transferred, and so for example oil, fat and meat remnants of a kebab knife can be removed effectively in a water bath. The removably attached to the drive housing tool head is formed in a manual cutter as a knife housing with plate-shaped rear wall, and covered in particular with circular blades as a tool with a separate, plate-shaped lid, which also removably allows cleaning. The peripheral region surrounding the circular blade is advantageously provided with at least one permanent magnet which removably holds the cover on the blade housing. As a result, the cutting chamber is quickly and easily exposed by simply loosening the lid of the Magnetethaiterung. Cutting room as well as circular knives can then be cleaned quickly and easily, for example in a water bath. For further cutting, the lid simply needs to be attached.

In a special embodiment of the tool head, the hand-cutting device can be used as a hand knife for cutting meat from meat skewers, for example for cutting Doner kebabs or gyros. For this purpose, the tool head is designed as a knife head of a doner knife and provided with a circular blade that sets a drive motor in rapid rotation or in rapid oscillation ver¬. The base part as a drive housing with a drive motor as a handle part is assembled with the axial coupling with the cutter head and is on the one hand grippy and safe to handle and on the other hand easy to clean: The cutter head can be removed and cleaned about in a dishwashing machine and the base part, since sealed, washed under running (even hot) water. In this case, the plant for the material to be cut is advantageously provided with an attachment-inhibiting coating-preferably made of polytetrafluoroethylene-which allows cleaning by simply rinsing off and, moreover, prevents the hand-cutting device from "hanging" during cutting. Furthermore, the hand-cutting device has a setting slide for the cutting depth, which is pivotably connected to the blade housing of the hand-cutting device.

The essence of the invention will be explained in more detail with reference to the embodiments illustrated in Figures 1 to 10; show:

Fig. 1: coaxial plug-in coupling - scheme - exploded view:

Fig. Ia: clutch closed; Fig. 2: coaxial coupling as pipe / hose connector - scheme;

Figure 2a: clutch closed with seals; Fig. 3: coaxial plug-in coupling as shaft coupling - scheme; Fig. 4: Designed as a doner knife hand cutter with

Drive housing and cutting head - schematic;

Fig.4a: front view with Einstellkulisse FIG. 5: Manual cutting device according to FIG. 4 partially cut perspective schema representation; FIG.

FIG. 6: Manual cutting device according to FIG. 4 with the cover removed, in perspective schematics; FIG.

Fig. 7: Detail hand cutting device schematic section

Fig. 8: detail bearing housing perspective schema representation;

Fig. 9: detail bearing housing according to Figure 8, schematic section;

Fig. 10: Detail plug-in coupling, Fig. 10a: coupled, Fig. 10b: uncoupled.

The coaxial plug-in coupling consists of a base part 10 and an attachment part 20, both designed so that they are substantially connected to Formschiuss so that the attachment part 20 relative to the base member 10 can be rotated. For this purpose, the base part 10 has a projection 11, which is inserted into a receptacle 21 of the attachment part 20, both with a circular cross-section, which ensures the rotatability. On the end face 12 of the projection 11, a permanent magnet 13 is arranged, which cooperates with a second permanent magnet 23 arranged in the base 22 of the receptacle 21; it being understood that one of the permanent magnets should be replaced by a ferromagnetic insert, which cooperates with the remaining permanent magnet. Sleeves 14 and 24 are advantageously provided which cover and protect the coupling parts. This results in a coaxial coupling with the same caliber throughout, which can be used for many applications. It is advantageous to use a seal 24.1 for intending the coupling between the mutually meeting end faces of the sleeves 14 or 24.

[0019] Such a coaxial coupling could already be assembled in this form, but it would be difficult to loosen, the forces acting on it are counteracting. Guiding means allow a precise positioning of the base part 10 relative to the attachment part 20 and also facilitate the loosening during rotation of these two coupling parts 10 and 20 against each other by "slowly" increasing the distance between the cooperating end faces of the permanent magnet 13 and the permanent magnet 23. FIG the representation are - without Ausschiuss other embodiments - at the neck 11, two diametrically opposed radial pins 15 are provided. The receptacle 21 has corresponding guide grooves 25 into which these radial pins 15 engage. When assembling, the radial pins 15 slide into the guide grooves 25 and thus cause a twist. hung, with the approach to the end position, the magnetic forces amplify so that the clutch slides automatically into the end position.

To use the coaxial coupling as a pipe / hose coupling, the base part 10 with approach 11 as well as the attachment part 20 with Auf¬ acquisition 21 are formed as continuous hollow parts. For coupling tubes / hoses - shown as tube projections 31 - the respective ends are led into the free ends of the base part 10 or of the attachment part 20 and fixed therein in a known manner with means (not shown). Such a coaxial coupling requires a seal. To this end, seals 16 and 26 designed as axial or radial seals are provided, for the reception of which the inner end faces 22 have grooves into which a seal 26 is inserted, the counter surface thereof being a sealing surface machined in the usual way. To receive a seal 16, the outer surface of the projection 11 or the inner surface of the receptacle 21 is grooved. The groove receives the seal 16 formed as an O-ring, lip seal or the like.

In order to use the coaxial coupling for transmitting rotating or oscillating motion, the base part 10 is provided on the drive side with a connection for a particularly flexible shaft, which rests on a first intermediate shaft mounted in the base part 10 with sliding pin or roller bearings 35.1 works. The output of this intermediate shaft 35.1 is designed as a coupling head 36.1 and is used for coupling to the arranged in the second coupling part 20 and in turn mounted with Gleit- Stift¬ or roller bearings 37.2 intermediate shaft 35.2.

Alternatively, the first coupling part 10 is formed as a driving part of a hand-held tool and has a drive motor 44 with electric, hydraulic or pneumatic drive, the output for coupling to the intermediate shaft 35.2 as the coupling head 36.1 corresponding counter-coupling head 36.2 is formed, wherein both coupled to form the power transmitting clutch. This second intermediate shaft 35.2 is again mounted in the second coupling part 20 with sliding, pin or roller bearings 37.2; its output is - according to the Verwen¬ the clutch - removed and possibly passed on.

FIGS. 4 and 5 show this coupling used for a hand-cutting device 40, for example for cutting gyros or doner kebabs, in section or in a partially sectioned perspective. The drive housing 41 designed as a handle, in the form of a handle, to which the tool head 50 designed as a cutting head with circular blade 62 is attached, the drive motor 44 is arranged, which is connected via the rotatably mounted motor housing. shaft 44.1 is connected to a angeord¬ at the front side of the cutting head 50 Neten circular blade 62. In FIG. 5, the separation of the two housings 40 and 50 is indicated, in which the projection 40.1 of the drive housing 41 is guided into the receptacle 50.1 of the knife housing and held by at least one permanent magnet 46, wherein the radial pin 47 in the (not closer designated) sliding ring groove, which causes rotational movement when applying and when releasing. To supply power to the drive motor 44, a cable is advantageously pluggable via the line connection 42 into the drive housing 41. A film switch 43, which - because not highly resilient - cooperates with an electronic switch 43.1, allows a slim housing. It goes without saying that batteries or accumulators can also be used for the voltage supply.

The output of the drive motor is discharged via the motor shaft 44.1, whose free end is coupled to the plug-in coupling 65 of the drive shaft 63, the circular blade 64 of the cutter head 50 via the coupling head 66 of the motor shaft interacting with the coupling head 67 of the drive shaft 48 44.1 is driven. The attached at the output of the drive shaft 67 with the screw 64.1 circular blade 64 is covered by a blade housing 50, whose front side formed by a cover 51 forms the plant for the cutting material. A pivotable about the pivot axis 55.1 Einstellkulisse 55 allows for adjusting the cutting width a change in the gap width between circular blade 62 and Einstellkulisse 55, which can be adjusted with the adjusting screw 56. Thus, the operation of the Handschneid¬ device 40 is clear: The downwardly directed arc of the circular blade 62 is thus free for the cutting process, the Einstellkulisse 60 allows to set the cutting thickness.

The knife housing 50 is formed from a plate-shaped rear wall 52, which has a circular area surrounding the peripheral edge 53 auf¬, in which at least one of the magnets 54 is embedded, which is the exposed as a separate part, also plate-like ausge¬ formed lid 51st hold. The edge region 53 is formed horseshoe-shaped aus¬ and formed on the plate-shaped rear wall 52. This results in a protective housing 50, which comprises the circular blade. In the legs 53.1 and 53.2 of the horseshoe-shaped edge portion 53, as well as in its upper bent portion 53.3 a magnet 54.1 and 54.2 bzw.54.3 is embedded in each case. In order to be able to easily attach the lid 51 to the magnetised area, stop edges 57.1 and 57.2 are provided on the leg ends, to which the lower edge of the Cover 51 for attachment to the tool housing designed as a measuring head 50 can be applied. With magnetic action, the lid 51 is held on the edge portion 53 of the blade housing and is pulled when donning the lid 51 by itself in its final position. The magnets 54.1. 54.254.3 are advantageously recessed and the cooperating with them ferromagnetisehen counterparts nub-like ausge¬ forms so that when attached cover 51, the knobs in the Vertie¬ tions of the magnets fit and so tightly pulled pulled against the Rand¬ area 53 hold the tool head 50 designed as a knife housing. To loosen and remove the cover 51, gripping recesses 59.1 and 59.2, which are overlapped from the outside by the edge of the lid, are molded into the edge region 53, which, when gripped behind by fingertips, facilitates detachment and removal.

Figures 7, 8 and 9 show a further embodiment of the invention, which allows in particular a simple disassembly of the device for cleaning. The shaft transmitting the drive passes through the manual cutting device 40 divided by the coaxial coupling into a drive housing and the tool head. The plug coupling 65 connects the drive shaft 63 and motor shaft 44.1 and thus also the drive motor 44 with the circular blade 64 on the one hand, the Ansetzhülse 60 relative to the drive housing 41, and on the other hand, the Lagerge¬ housing 62 relative to the Ansetzhülse 60 sealed with O-ring seals 69, which causes waterproofness. The same applies to the film switch 43.

The blade housing 50 has on its rear side formed on the rear wall 52, formed as Ansetzhülse 60 attachment part. In the attachment sleeve 60, a bearing 62 is releasably inserted with Formschiuss, through which the drive shaft 63 extends and which receives this stock. The bearing 62 of the drive shaft 63 can be easily pushed out of the Ansetzhülse 60 so that the parts can be cleaned or replaced separately. The Formschiuss is achieved by integrally formed studs 62.1 on the bearing 62, which prevent engaging in pockets 61.1 co-rotation. In an advantageous manner, on the one hand, also the bearing housing 50 are sealed relative to the Ansetz¬ sleeve 60 and this relative to the drive housing 41. For this purpose, this seal has waterproof O-rings 69, so that the entire hand cutter - especially when used as a kebab knife - for cleaning and disassembled into individual parts can be immersed in a water bath, especially since this training an intrusion of meat, oils or Fats counteracts. FIG. 10 shows the plug-in coupling 65 of a hand-cutting device 40 coupled (FIG. 10a) and uncoupled (FIG. 10b). In this case, the drive shaft 63 is operatively connected to the motor shaft 44.1 via a coaxial plug-in coupling 65, which enables a simple, easy disconnectibility of the motor 44 and circular blade 64. The plug-in coupling 65 consists of coaxially aligned interlocking pins 67.1, 67.2, which are arranged both on the drive shaft side and the motor shaft side. For self-locating, easy and quick coupling, the free ends of each of the pins 67.1, 67.2 are chamfered at the ends or roof-shaped, which ensures a secure coupling process. If the pins 67.1, 67.2 are moved toward one another, the oblique surfaces of the pin ends automatically guide the pins into the gap regions between them.

To improve the stable support of the pins 67.1, 67.2 into each other, the drive shaft side pin 67.2 act at their free ends with a spring washer 68.1 together. A corresponding spring ring may also be provided on the motor shaft side. In order for the coupling process to take place in a damped manner, a damping element 68.2 is provided in the region of the drive shaft 63, preferably on the journal shoulder. The damping element 68.2 may in this case be made of a ring formed from elastomer or a metal ring provided with spring properties.

Claims

claims

1. Coaxial coupling with a base part and an attachment part, in which the base part or receiving part has a cylindrical projection which can be inserted into a hollow cylindrical receptacle and fixed there, characterized by at least one Perma¬ nentmagneten (13, 23), on the cylindrical Approach (11) or in the bottom of the hollow cylindrical receptacle (21) is provided, which cooperates with the counterpart such that both are pulled against each other by means of magnetic interaction.

2. coaxial coupling according to claim 1, characterized in that on the outside of the cylindrical projection (11) and on the inside of the hollow cylindrical receptacle (21) guide means are provided, with which a rotational movement during assembly of the base part (10) and attachment part (20). is enforced, said rotational movement is performed at most over 360 °, preferably at most over 120 °.

3. coaxial coupling according to claim 2, characterized in that as guide means at least one spiral guide groove (25) and engaging in this guide radial pin (15) are vor¬ seen, which effect the rotation in cooperation, wherein the end position of this spiral guide groove (25 ) causes a positioning of the attachment part (20) relative to the base part (10).

4. Coaxial coupling according to one of claims 1 to 3, characterized in that the base part (10) and the attachment part (20) of the coaxial coupling are designed as hollow cylinders, and are provided at the free ends with connection means for pipe or hose (31).

5. Coaxial coupling according to one of claims 1 to 3, characterized in that the base part (10) as a drive housing (41) to a flexible shaft or a drive motor (44) connectable motor shaft (44.1), and that the Ansatz¬ part as Knife head (50) are formed with attached rotating or oszil¬ lierenden tool, the output of bieg¬ samer shaft or drive motor (44) via the motor shaft (44.1) the rotational movement on the in the cutter head (50) arranged tool via a detachable, for example as a claw or fork coupling ment trained plug-in coupling (65) transmits, which is connected to the motor shaft (44.1) or in operative connection.

6. Coaxial coupling according to one of the preceding claims 1 to 5, characterized in that the drive housing (41) with the coupled with the coaxial coupling tool head form a handheld cutting device, wherein the tool head is designed as a fair housing (50) and in particular for grilled meat how Gyros or kebab has a rotating or oscillating circular blade (64) provided in a blade housing (50) which is detachably coupled to the drive means.

7. Application of the coaxial coupling in a manual cutting device according to claim 6, characterized in that the drive motor (44) via a in the outer surface of the drive housing (41) is substantially flush with this provided as Folienschal¬ ter (43) switch is controlled.

8. Application of the coaxial coupling in a manual cutting device according to An¬ claim 6 or 7, characterized in that the bearing housing (62) of the drive shaft (63) in the tubular sleeve (61) is releasably inserted with Formschius, between bearing housing (62) and tube sleeve (61) nubs (62.1) are provided, which act in pockets (61.1) engaging as a rotation lock.

9. Application of the coaxial coupling in a manual cutting device according to claim 6, 7 or 8, characterized in that on the one hand, the tubular sleeve (61) relative to the drive housing (41) and on the other hand abge¬ the bearing housing (62) relative to the tubular sleeve (61) abge ¬ are sealed.

10. Application of the coaxial coupling in a manual cutting device according to one of claims 6 to 9, characterized in that the knife housing (50) is formed by a plate-shaped Rück¬ wall (52) with an approximately rectangular molded edge region (53), the circular blade ( 64) surrounding, approximately horseshoe-shaped aus¬ is formed, and with a circular blade (64) covering, removable cover (51).

11. Application of the coaxial coupling in a hand-cutting device according to claim 10 An¬, characterized in that in each case in the legs (53,1, 53.2) of the horseshoe-shaped edge region (53) and its at least one magnet (54.1, 54.2, 54.3), which cooperates with a ferromagnetic counterpart on the cover (51), wherein preferably the ends of the legs (53.1, 53.2) are provided with abutment edges (51.1, 51.2). are provided, on which the lower edge of the lid (51) is ange¬ sets.

12. Application of the coaxial coupling in a manual cutting device according to claim 11, characterized in that each of the magnets (54,1; 54.2; 54.3) is recessed, and that the counterparts, when the cover (51) is fitted, form fit into the openings of the Insert magnets (54.1, 54.2, 54.3).

13. Application of the coaxial coupling in a manual cutting device according to one of claims 6 to 12, characterized in that its knife housing (50) has a setting slide (55) for the cutting depth, which is parallel to the plane of the rotating knife (64) and spaced pivot axis (55.1) hinged to the blade housing (50) and with a screw drive (56) is adjustable

14. Control device for a formed with a coaxial coupling hand cutting device according to one of claims 6 to 12, characterized in that by means of a plastic-enclosed in the shaft key (43) different motor speeds are selectable.

15. Control device according to claim 13, characterized by a tilt switch, such that at the intended position of the hand cutting device that the drive of the rotary blade is switched on, and that at least in a vertical position, the switchability of the drive is switched off.