EP3471916A1

EP3471916A1 - Rotationally drivable rotary tool device

Info

Publication number: EP3471916A1
Application number: EP17729107.7A
Authority: EP
Inventors: Alexander Montabaur
Original assignee: Monti Werkzeuge GmbH
Current assignee: Monti Werkzeuge GmbH
Priority date: 2016-06-20
Filing date: 2017-06-08
Publication date: 2019-04-24
Anticipated expiration: 2037-06-08
Also published as: US20190224805A1; CA3028516A1; PL3471916T3; RU2717440C1; MX2018016006A; EP3471916B1; DE102016111265A1; AU2017283040A1; JP6840234B2; JP2019517931A; CN109475994B; BR112018076730A2; US10807211B2; WO2017220338A1; ES2802260T3; AU2017283040B2; CN109475994A

Abstract

The subject of the present invention is a rotationally drivable rotary tool device and in particular a rotary brush tool. The invention is equipped, in its basic construction, with a tool holder (1, 2) having at least one drive-side clamping element (1) and a tool-side clamping element (2). The two clamping elements (1, 2) are connected releasably together and receive a rotary tool (5, 6). Furthermore, the two clamping elements (1, 2) ensure that the rotary tool (5, 6) is held. According to the invention, the tool-side clamping element (2) and the rotary tool (5, 6) define a structural unit (2, 5, 6). To this end, the clamping element (2) in question is configured as a holding cage (2) that encloses the rotary tool (5, 6) radially and axially at least in part.

Description

Rotary drivable turning tool device

Description:

The invention relates to a rotary drivable rotary tool device, in particular a rotary brush tool, with a tool holder having at least one drive-side and a tool-side clamping element, wherein the two clamping elements are releasably connected to each other and receive and hold a 5 rotary tool.

In a rotationally drivable rotary tool device of the construction described above, as described in EP 2 371 487 B1, two specially designed clamping elements are provided and releasably coupled by means of a Verschlüssl e, element against the force of at least one spring. The two clamping elements and the associated tool holder serve to receive the turning tool. The rotary tool can be a rotary brush with a flexible brush belt, as described, for example, in DE 42 05 265 C1 of the applicant 15, which is also relevant at this point. In principle, however, a rotary tool according to EP 1 859 903 B1 can also be accommodated with the aid of the tool holder.

A comparable rotationally drivable turning tool device is described in DE 100 30 586 A1. Here comes a tool with a circular

20 disc-shaped tool body used. The tool body has a central opening for attachment to a machine tool or generally a rotary drive unit. In the opening a carrying device is provided, the body engages over the edge of the opening at least on one side of the tool body. On the other side of the tool body is a fastening

Provided 25 supply device, which can be clamped on the machine tool and to which the support means is releasably securable with clamped fastening device. As a result, the tool body is in total

velvet secured axially and held against rotation. The known support device is obviously only in conjunction with designed as a separating or grinding discs circular-shaped tool bodies. Rotary brush tools are also known from practice and by the literature in a variety of configurations. Thus, DE 43 26 793 C1 is concerned with a brush assembly which can be driven in rotation, in which the brush holder has two end disks spaced apart via a divided spacer bushing and the end disks arranged at a predetermined distance from the bushing jacket and distributed over the disk circumference. The ring brush has a flexible brush belt with outwardly protruding bristles and with bristle-free belt zones for the axial webs that overlap the brush belt. In a rotatably drivable tool clamping device according to EP 0 319 756 A2, the procedure is such that two clamping disks have concentric annular grooves for clamping tool sleeves of substantially the same diameter. In this way, a perfect positioning and stabilization of the respective clamped tool sleeve is to be ensured, while dispensing with a rubber core or the like support body.

Finally, the prior art still knows a rotary brush tool, as described in EP 0 347 429 B1, which serves as an example for surface processing. In this case, a brush belt carrier is equipped with a multipart clamping unit and a resiliently expandable by means of the clamping unit ring body. The rotary brush tool also has a brush band with a flat cross-section, which is designed as a closed ring.

The brush belt carrier and the brush belt can form a unit. This is to achieve a versatile use and an effective effect and longevity at the same time. The prior art may not be satisfactory in all aspects. Thus, for example, in DE 42 05 265 C1 or in the context of DE 43 26 793 C1 each worked with a flexible band of the brush tool. As a result, movements of the brush belt with respect to the tool holder for processing are sometimes deliberately utilized, as described in EP 1 834 733 B1. In fact, at this point, a stop means immersed in the rotating bristle ring of the ring brush is provided. The stop means decelerates the bristles for a certain time, so that after their release, the kinetic energy stored thereby is used for additional beating processing of a surface of a workpiece by the bristles. This requires some movement of the flexible brush belt within the tool holder.

In the case of the ring brushes used in practice, in connection with the described rotary tool devices, the ring brush or its brush belt does not exactly "fit" and perform more or less uncontrolled movements with respect to the tool holder The invention is based on the technical problem of further developing a rotatively drivable turning tool device of the construction described above in such a way that perfect operation of the turning tool in the turning tool device is ensured and In particular, only defined movements of the turning tool are allowed.

To solve this technical problem, a generic rotationally drivable rotary tool device in the invention is characterized in that the tool-side clamping element and the rotary tool define a unit and the relevant clamping element is designed as the rotary tool at least partially radially and axially enclosing holding cage.

In the context of the invention, the tool holder is initially composed of the drive-side and the tool-side clamping element. The drive-side clamping element is generally associated with a drive or a rotary drive unit. For this purpose, the drive-side tensioning element is usually connected to the rotary drive unit in question or a rotatably driven output shaft. In addition, the tool-side clamping element is provided, which is releasably coupled to the rotary drive unit via the drive-side clamping element. According to the invention, the tool-side clamping element and the rotary tool define a structural unit. In this way, the uncontrolled movements of the turning tool, which are often observed in the prior art, can be precluded right from the outset and due to the design. Because the turning tool is connected to the tool-side clamping element to the unit.

At this point, it is possible that the tool-side clamping element and the rotary tool are mechanically connected to each other, for example by a screw, rivet or other connection. In general, the tool-side clamping element and the rotary tool (by ultrasound) are welded together.

Here, the invention is based on the fact that the tool-side clamping element and the rotary tool or in general a brush belt are each made of plastic in a rotary brush and consequently (ultrasonically) can be welded together. Of course, at this point, an adhesive connection with an adhesive alternatively or additionally possible and is included.

The tool-side clamping element is according to the invention as the rotary tool at least partially radially and axially enclosing holding cage out forms. That is, the rotary tool is fixed both radially and axially in the holding cage in question or can only move with limited by the holding cage radial and axial clearance relative to the holding cage. As a result, a total of defined conditions are made available, which concerns any movement of the rotary tool relative to the tool holder or generally the design of the rotary tool in combination with the tool holder. In this way, the invention ensures that the turning tool device in conjunction with the assembly of the rotary tool and the holding cage always and reproducibly has the guaranteed properties and provides work results. Here are the main benefits.

The holding cage is generally a circular ring cage with peripheral axial webs. The axial webs engage over the rotary tool. As a rule, the rotary tool has recesses therefor, so that the axial webs engage over the rotary tool in the region of these recesses.

In general, a plurality of axial webs are provided on the holding cage, which is arranged distributed over the circumference of the cage designed as a cage cage holding cage

are. For example, you can work with three axial webs, which are distributed over the circumference of the circular cage in each 120 ° -Arangement.

Since the retaining cage is designed as a circular cage and usually has a central bore for receiving the drive-side clamping element, which is designed for this purpose as releasably engaging retaining adapter in the holding cage, initially an annular surface of the annular cage surrounding the central bore is realized. The said annular surface of the annular cage generally accommodates the brush belt of the annular brush, which encloses the annular surface in question on the outside circumference for this purpose. This can be done with and without play. In general, the brush belt in question and the annular surface abut each other directly. The axial webs now define a second surface which is at the same time radially spaced from the first annular surface. Because the axial webs engage over the rotary tool or the ring brush in the region of the recesses.

Consequently, the rotary tool or its brush belt is held radially between the questionable first annular surface and the axial web or the second annular surface formed thereby. This is true even if the axial webs describe only a small part of the circumference of the second annular surface.

In addition to this radial support of the rotary tool within the holding cage, the holding cage additionally provides for an axial support. For this purpose, each circumferential radial webs are provided, which are interconnected via the axial webs. As a result, the radial webs additionally provide for the axial securing of the rotary tool received in the interior of the holding cage. This is thereby at least partially secured radially and axially, because of the retaining cage by the limited extent of the axial webs and radial webs

does not provide a continuous enclosed cage-like enclosure, which is not necessary.

As already explained, the device-side tensioning element is designed as a holding adapter detachably engaging in the holding cage. For this purpose, the holding adapter removably engages in the central bore of the holding cage. For this purpose, the holding adapter advantageously has circumferential locking pins. The locking pins engage in the assembled state of the retaining adapter in associated mounting holes in the holding cage.

The locking pins are advantageously radial locking pins and the receiving bores are generally designed as radial receiving bores. In this case too, a circumferentially equally distributed arrangement of both the locking pins and radial locking pins and the locating bores or radial locating bores is recommended. In fact, it is usually possible to proceed in such a way that both the locking pins and the locating bores are offset again at a 120 ° offset over the circumference of the retaining adapter or the central bore. In this case, it is advantageously possible to work in such a way that the locking pins or radial locking pins and the associated receiving bores or radial locating bores are respectively placed in the region of the axial webs likewise arranged with a 120 ° offset. As a result, a particularly intuitive assembly is provided.

The locking pins themselves are generally operated by means of a pressure element against spring force. In this case, for example, it is possible to proceed in such a way that the pressure element provided on the holding adapter in the actuated state against the spring force ensures that the blocking pins or radial blocking pins assume a retracted position. This can also provide a respective locking pin or radial locking pin associated spring.

As soon as the pressure element is relieved and thus with the help of the associated spring experiences a provision, the locking pins are urged against the force of their associated springs to the outside and can dip into the mounting holes or radial mounting holes. Now the holding adapter is releasably anchored inside the central bore of the holding cage. In contrast, the above-described functional state with the applied rotary element corresponds to the fact that the structural unit can be removed from the retaining cage and the rotary tool from the retaining adapter. In order to facilitate the releasable union of the retaining adapter and the retaining cage by receiving the retaining adapter in the central bore of the retaining cage, the retaining adapter and the respective central bore are generally equipped with corresponding centering elements for mutual alignment. As a result, the retaining adapter can only be accommodated in certain angular positions in the central bore of the retaining cage. These angular positions correspond to the fact that the locking pins or radial locking pins in the retaining adapter can meet and also hit the opposite receiving bores or radial locating bores in the central bore of the retaining cage.

As already explained, the holding adapter is usually connected to the rotary drive unit. In most cases, the holding adapter is connected together with optionally a holding plate and a stop means to the rotary drive unit in question. The stopping agent is advantageously one such as has already been described in EP 1 834 733 B1.

By the firm connection of the holding adapter together with the optional holding plate and the stop means with the rotary drive unit is ensured

that the position of the stop means can be defined and specified in comparison to the turning tool to be mounted. Because the turning tool forms together with the holding cage already mentioned assembly. Once the assembly of the turning tool and the holding cage is coupled to the holding adapter on the rotary drive unit, there are reproducible ratios for the length and orientation of the bristles, the possible play of the brush belt of the ring brush against the holding cage and the position and mounting of the stop means , This is of particular importance in order to be able to implement the beating machining of the surface of the workpiece or material described in the context of patent EP 1 834 733 B1 as desired and with verifiable success. Here are the main benefits.

In the following the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment. FIG. 2 shows the rotary drive unit with the holding adapter connected thereto, the holding plate and the stop means, FIG. 2 shows the rotary drive unit according to the invention in plan view, partially broken away.

Fig. 3, the assembly of the holding cage and the rotary tool Fig. 4 shows the article of FIG. 1 with broken holding adapter and

Fig. 5 shows the holding adapter in a single representation.

In the figures, a rotatably driven rotary tool device is shown, which in the exemplary embodiment and not restricting is a rotary brush tool device or a rotary brush tool. The device shown has in its basic structure a tool holder 1, 2, which is equipped with at least one drive-side clamping element 1 and a tool-side clamping element 2.

The drive-side clamping element 1 in the exemplary embodiment is a holding adapter 1, which is connected to a rotary drive unit 3 or its drive shaft, which is only indicated in FIG. 2. In addition, it can be seen in this illustration of FIG. 2 nor a holding plate 4 and a stop means S. The holding plate 4, the holding adapter 1 and the stop means S are present firmly connected to the rotary drive unit 3. In addition, the design is such that rotations of the output shaft of the rotary drive unit 3 are transmitted to the holding adapter 1.

The clamping element 2 shown on the tool side and in FIG. 3 is a holding cage 2, which surrounds a rotary tool 5, 6 at least partially radially and axially. The rotary tool 5, 6 is present as a ring brush or its output shaft 5, 6 equipped with a brush belt 6 and connected to the brush belt 6 and, in contrast, radially projecting bristles 5.

The two clamping elements 1, 2 or the holding adapter 1 and the holding cage 2 are detachably connected to each other, take the rotary tool in question 5, 6 and ensure its support. Due to the releasable connection of the holding adapter 1 with the holding cage 2, the rotational movements of the output shaft of the rotary drive unit 3 via the holding adapter 1 on the holding cage 2 and thereby on the entrained by the holding cage 2 rotary tool 5, 6 über-.

carry, which rotates as a result thereof, as indicated by a double arrow in Fig. 1 for both possible directions of rotation.

The holding cage 2 is shown in FIG. 3 designed as a circular cage. At this point, one first recognizes a central bore 7 in the holding cage or circular ring cage 2 in question, which serves to receive the holding adapter 1 and is set up. In addition, an annular surface or first annular surface 8 is provided which surrounds the central bore 7. Radial webs 9 are peripherally connected to the first annular surface 8, distributed over the circumference. In the present case, the radial webs are 9 in the embodiment and not limiting in a 120 ° arrangement.

Respectively two radial webs 9, which are opposite one another with respect to the central first annular surface 8, are coupled to one another with the aid of an axial web 10 connecting the two radial webs 9 at the head end. Consequently, the axial webs 10 are arranged distributed over the circumference of the annular surface or first annular surface 8, again and not restricting are found every 120 °. The axial webs 10 define a second annular surface which is spaced apart from the first annular surface 8 and which is indicated by dashed lines in FIG. 3.

For this purpose, the rotary tool 5, 6 via recesses 1 1, in which the axial webs 10 are provided and the rotary tool or the ring brush 5, 6 overlap. The axial webs 10 or the second annular surface and the first annular surface 8 now ensure that the rotary tool 5, 6 or its brush belt 6 is secured radially inside the retaining cage 2 formed in this way and radially enclosed by means of the retaining cage 2. The two-sided radial webs 9 compared to the central first annular surface 8 additionally provide an axial

Secured by the holding cage 2 or that the holding cage 2, the rotary tool 5, 6 axially surrounds. Since the axial webs 10 are only partially provided on the circumference of the first annular surface 8 and spaced therefrom, no continuous second annular surface is defined by the axial webs 10, but only a virtual and in Fig. 3 dashed lines indicated annular surface. Nevertheless, the holding cage 2 formed in this way ensures the desired reception and holding of the rotary tool 5, 6 and its radial and axial securing. The rotary tool 5, 6 can now be accommodated in principle with play within the holding cage 2. According to an advantageous embodiment, however, the rotary tool 5, 6 is mechanically coupled to the holding cage 2. In fact, the rotary tool 5, 6 or the ring brush 5, 6 used at this point generally has a brush belt 6 made of plastic. Also, the holding cage 2 is advantageously made of plastic. In this case, different plastics can be used, for example polyamide (PA) for the brush belt 6 and polyethylene (PE) for the holding cage 2. In any case, the holding cage 2 and the brush belt 6 can be welded together (by ultrasound). Of course, this is only an example and not restrictive. In this way, the tool-side clamping element or the holding cage 2 and the rotary tool or the ring brush 5, 6 define a structural unit 2, 5, 6.

Looking at the holding adapter 1, as shown in FIGS. 2 and 5, it can be seen first of all that the holding adapter 1 is designed in the exemplary embodiment and not restrictive disk-shaped or cylindrical. In fact, the retaining adapter 1 is adapted to the size and shape of the central bore 7 in the retaining cage 2. In addition, the holding adapter 1 is equipped with peripheral locking pins 12. The locking pins 12 engage in the assembled state of the retaining adapter 1 in associated receiving bores 13 in the holding cage 2 a.

In fact, the receiving bores 13 are shown in FIG. 4 in the first annular surface 8, in the region of the radial webs 9. In this way, the holding adapter 1 can be particularly intuitively connected to the holding cage 2 detachably.

The locking pins 12 are radial locking pins 12, ie such locking pins 12, which engage in the radial direction in the associated receiving bores 13. For this reason, the receiving bores 13 in the exemplary embodiment are also designed as radial receiving bores 13. The locking pins 12 are now actuated by means of a pressure element 14 against spring force.

The pressure element 14 in the exemplary embodiment is a central actuating knob 14 of the holding adapter 1. With the help of the Druckele- element 14, the locking pins 12 are spring-backed withdrawn in its operation inside the retaining adapter, so that in this depressed position of the pressure element 14, the assembly 2, 5, 6 from the holding cage 2 and the rotary tool 5, 6 easily from the can be removed to the rotary drive unit 3 connected holding adapter 1. In addition, in this way differently designed turning tools 5, 6 including holding cage 2 as each assembly 2, 5, 6 are anchored to each firmly connected to the rotary drive unit 3 holding adapter 1.

As soon as the actuating button or the pressure element 14 is relieved against the spring force, the movement of the pressure element 14 ensures that the locking pins 12 are urged into their exposed position. In this exposed position, the locking pins 12 can engage in the receiving bores 13 and ensure that the assembly 2, 5, 6 from the holding cage 2 and the rotary tool 5, 6 rotatably anchored to the retaining adapter 1. As soon as the

Holding adapter 1 is rotated by means of the rotary drive unit 3 in rotation, these rotations are transmitted as desired to the rotary tool 5, 6. In addition, one recognizes yet corresponding centering elements 15, 16 on the one hand on the retaining adapter 1 and on the other hand on the annular surface 8 and the peripheral side of the central bore 7. The corresponding centering elements 15, 16 are each flat surfaces, which ensure that in cross section Circular holding adapter 1 in which also in cross-section circular central bore 7 against rotation and centered can engage. This ensures that the holding cage 2 with the rotary tool 5, 6 mounted therein can be coupled against rotation with the holding adapter 1, and consequently rotational movements of the rotary drive unit 3 or its output shaft are transmitted to the rotary tool 5, 6 without any problem.

Claims

claims:

1 . Rotary drivable rotary tool device, in particular rotary brush tool, with a tool holder (1, 2) with at least one drive-side clamping element (1) and a tool-side clamping element (2), wherein the two clamping elements (1, 2) are releasably connected to each other and a rotary tool (5, 6) and hold, thereby vergeken nz eichnet that the tool-side clamping element (2) and the rotary tool (5, 6) define a structural unit (2, 5, 6) and the relevant clamping element (2) as the rotary tool (5, 6 ) is formed at least partially radially and axially enclosing holding cage (2).

2. Device according to claim 1, characterized in that the drive-side clamping element (1) as in the holding cage (2) releasably engaging holding adapter (1) is designed.

3. Device according to claim 1 or 2, characterized in that the holding cage (2) as a circular ring käf ig with peripheral axial webs (10) is equipped, which engage over the rotary tool (5, 6).

4. Device according to claim 3, characterized in that the axial webs (10) engage over the rotary tool (5, 6) in the region of recesses (1 1).

5. Device according to one of claims 1 to 4, characterized in that the holding cage (2) has a central bore (7) for receiving the holding adapter (1).

6. Device according to one of claims 1 to 5, characterized in that the holding adapter (1) has peripheral locking pins (12), which in the assembled state of the holding cage (2) on the holding adapter (1) in associated receiving bores (13) in the holding cage ( 2) intervene.

7. Device according to claim 6, characterized in that the locking pins (12) as radial locking pins (12) and the associated receiving bores (13) as radial receiving bores (13) are formed.

8. Device according to claim 6 or 7, characterized in that the locking pins (12) by means of a pressure element (14) are actuated against spring force.

9. Device according to one of claims 1 to 8, characterized in that the holding adapter (1) and the central bore (7) in the holding cage (2) for receiving the holding adapter (1) with corresponding centering elements (15, 16) for mutual alignment and rotatable coupling are equipped.

10. Device according to one of claims 1 to 9, characterized in that the holding adapter (1) together with optionally a holding plate (4) and a stop means (S) to a rotary drive unit (3) is connected.