US20200324392A1 - Tool with tool elements - Google Patents

Tool with tool elements Download PDF

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Publication number
US20200324392A1
US20200324392A1 US16/305,667 US201716305667A US2020324392A1 US 20200324392 A1 US20200324392 A1 US 20200324392A1 US 201716305667 A US201716305667 A US 201716305667A US 2020324392 A1 US2020324392 A1 US 2020324392A1
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United States
Prior art keywords
tool
mounting portion
elements
grinding
wall
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Pending
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US16/305,667
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English (en)
Inventor
Poul Erik Jespersen
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Flex Trim AS
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Flex Trim AS
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Assigned to KADICMA APS reassignment KADICMA APS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JESPERSEN, POUL ERIK
Assigned to FLEX TRIM A/S reassignment FLEX TRIM A/S ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KADICMA APS
Publication of US20200324392A1 publication Critical patent/US20200324392A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material
    • B24D9/085—Devices for mounting sheets on a backing plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/16—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/142—Wheels of special form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/145—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face having a brush-like working surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/003—Wheels having flaps of flexible abrasive material supported by a flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings

Definitions

  • the embodiment has its background in machining units for grinding and sanding, and which are provided for this with a tool in the form of a machining head, such as a grinding head with tool elements in the form of grinding elements.
  • a tool in the form of a machining head such as a grinding head with tool elements in the form of grinding elements.
  • embodiments of the invention may also be employed with other tools, such as polishing disks.
  • Grinding or sanding tools are known which are provided with grinding elements. Such tools are used extensively within the wood working industry and within the metal working industry. Likewise, the tools may be used within industries for working of other materials, such as fiberglass structures.
  • a grinding head For the surface machining of various elements, such as grinding or sanding, it is known how to employ grinding and sanding elements which are mounted on a machining unit in the form of a grinding head.
  • a grinding head may be disk-shaped, where the grinding elements are mounted on a side surface of the disk, or constructed as a combination of disk-shaped and cylinder-shaped parts.
  • these grinding heads it is typical of these grinding heads that they have some kind of dovetailed groove in which a number of grinding and/or brush elements are mounted.
  • These elements may comprise grinding elements in the form of grinding paper, brushes of fiber, hair, steel or another metal and combinations of these, for example in the form of backstop brushes, which support the grinding paper during use.
  • the grinding paper may be, for example, sandpaper for sanding of wood, metal, and the like, canvas and/or textile for polishing, or leather.
  • Brushes, support brushes and/or backstop brushes may be, for example, steel brushes, plastic brushes, or other types of brushes, including for example brushes of natural materials, such as plant-based brushes or brushes of animal hair.
  • Such tool elements can be made of a plastic material, in which grinding paper and brushes are embedded by casting a plastic material around grinding paper and/or brush.
  • brushes and/or grinding paper can be fixed in a rail element by clamping this around the brushes and/or grinding paper, arranged in the rail element used to make the respective tool element, or in another suitable manner.
  • a typical grinding head there are arranged on average between 8 and 50 tool elements.
  • the grinding heads are used often in industrial practice, but the grinding elements need to be replaced regularly. Such a replacement is typically done by pulling them out from the dovetail groove in which they are mounted and replacing them with new tool elements.
  • grinding tools In industrial operations, in the lumber industry, grinding tools are known which have variable speed in the form of pneumatic tools with grinding heads mounted on them. Manual tools are also known with grinding heads driven by electric motor with variable speed.
  • the tool has a top plate and a base plate. On the base plate it is possible to mount elements for grinding or sanding. There are furthermore openings in the base plate which make it possible to remove grinding dust through these openings. Top plate and base plate are joined to each other to form the tool, for example by bonding, welding, or mechanical clamping.
  • the tool is used in handheld tools with motor capacity on the order of 3500 kW. In stationary machining units the motor capacity will be larger. The force of the connection between drive plate and tool will also become larger accordingly in this case. Thus, the hook and eyelet connections between drive plate and tool become too weak, and there is a risk of the tool being pulled off during use.
  • top plate and base plate can also be produced by bonding, welding, or mechanical clamping, for example. These are processes which require a number of work steps with many different tools. Furthermore, they are time-consuming processes requiring some work time to assemble the top plate and base plate. Moreover, both processes are costly.
  • An aspect relates to a tool where various types of tool elements are mounted on various tools, and when the mentioned tools are easy to change both in order to switch between different tools and to replace the tool when worn out.
  • the purpose is to specify a tool which is suitable for onetime use and which is a cheap design.
  • Another purpose is to specify a tool which is suitable for automated assembling or mounting.
  • the tool portion comprises first mounting means or first mount
  • the mounting portion comprises second corresponding mounting means or mount for engaging with the first mounting means or first mount
  • the first and second mounting means or first and second mount comprise one or more resilient tabs, each of which is provided with at least one barb
  • the mounting means or mount furthermore comprise one or more recesses for receiving said barbs with a snap action in the assembled state of the tool for locking of the tool portion and the mounting portion to each other with the tool elements secured in the grooves.
  • first mounting means or first mount in the tool portion and second mounting means or second mount in the mounting portion one accomplishes a quick assembling of the tool.
  • the tool can be assembled without the use of tools or other equipment. It can be snapped together in easy fashion. One thus achieves a product which is cheap to produce. Furthermore, one achieves a tool which is particularly well suited for onetime use.
  • the user may simply select a tool or a number of tools with the desired properties for grinding, sanding or polishing a workpiece and mount them on or in the machining unit.
  • the tool elements will be firmly mounted in the tool portion.
  • individual tool elements such as is often the case in tools known thus far.
  • the user will quite simply replace the entire tool. In other words, one may say that one works with disposable tools in embodiments of the invention.
  • the first mounting means or first mount are resilient tabs placed on the tool portion.
  • the second mounting means or second mount are recesses placed in the mounting portion. The recesses are placed and configured to receive the resilient tabs such that the locking tabs enter into a locking engagement in the recesses.
  • first mounting or first mount are formed as resilient tabs placed on the mounting portion.
  • second mounting means or second mount, recesses, as mentioned above, are placed in this variant in the tool portion.
  • the resilient tabs and the corresponding recesses are placed such that the tool portion and the mounting portion may only be assembled correctly. A correct assembly can occur in one or more ways.
  • the mounting portion and the tool portion there is at least one set of mounting means or mount in the form of resilient tabs with at least one corresponding recess on the mounting portion or the tool portion, respectively.
  • the number of resilient tabs and corresponding recesses is therefore alternatively two, three, four, five, six, seven, eight or more.
  • the number of recesses may also be larger than the number of resilient tabs.
  • a correct way of assembling the unit may be accomplished, for example, in that the resilient tabs have different mutual spacings around the first inner wall of the tool element, and thus the resilient tabs have an asymmetrical placement. This is especially relevant when the tool is not symmetrical, so that it is important to assemble the tool portion and the mounting portion properly with a fixed position relative to each other.
  • the resilient tabs may also be placed so as to achieve a rotational symmetry, such that the tool portion and mounting portion can be assembled, for example, in two or more ways, by rotating the tool portion and mounting portion in relation to each other. This is achieved in that the resilient tabs are placed such that they are aligned with the recesses when the tool portion is rotated in relation to the mounting portion. This may also be accomplished by having more recesses than resilient tabs, so that the recesses are placed in correspondence with the resilient elements in the predetermined number of ways in which the tool portion and the mounting portion can be assembled.
  • the tool is designed such that the tool portion has a first inner wall, which is directed toward the mounting portion, the mounting portion has a second inner wall, which is directed toward the tool portion, and the radial outer surface of the second inner wall is dimensioned such as to be enclosed by the first inner wall when the tool is in the assembled state, and in connection with the first inner cylindrical wall or in openings in the first wall there are arranged resilient tabs with barbs, and along the radial outer side of the second inner wall in the mounting portion there are arranged a number of recesses in the bottom of the mounting portion, corresponding in position, shape, and number to the tool portion's resilient tabs.
  • the number of recesses need not necessarily correspond to the number of tabs. There may be more recesses, so that there are more possibilities for locking.
  • the first inner wall on the tool portion and the second inner wall on the mounting portion are able to ensure the stability of the machining unit by supporting the inner portion of the two portions, such that the tool portion cannot be pressed into the mounting portion in event of too much pressure against objects being machined.
  • Having both a first inner wall on the tool portion and a second inner wall on the mounting portion, where the first inner wall on the tool portion encloses the second inner wall on the mounting portion enables an easy and correct assembly of the tool by ensuring correct positioning of the tool portion and mounting portion in relation to each other and in relation to the drive shaft's position. This also helps achieve a further price reduction in the manufacture of the tool.
  • first inner wall and the second inner wall when the first wall encloses the second wall, help reduce the risk of the tool portion and the mounting portion shifting in relation to each other during use. This may occur, for example, if one or more of the resilient tabs should break off. This increases the safety during use of the tool.
  • the first inner wall and the second inner wall have rotational symmetry, such as a cylindrical shape, but they may also have other shapes such as oval, or polygonal, such as triangular, rectangular, pentagonal, hexagonal, or octagonal. This makes it possible to the tool portion and mounting portion to be assembled in two or more ways, as described above.
  • the first inner wall and the second inner wall may also have any non-rotationally symmetrical form. This means that the tool portion can only be assembled in one way, and this variant means that guide pins with corresponding guide grooves are no longer needed.
  • the first inner wall and the second inner wall can be an entirely joined wall or they may consist of lesser wall pieces or be an entire wall with openings or wall pieces with openings.
  • the resilient tabs have barbs or hooks at their outer end. Together with the recesses in the mounting portion, this accomplishes a snap lock, which is accordingly easy and quick to assemble.
  • An angular shape helps ensure that the tool portion and the mounting portion are assembled correctly, but other shapes are also possible.
  • the barbs or the hooks on the resilient tabs may face radially outward, radially inward, to the side, or at any angle in between.
  • the resilient tabs are configured to enter into locking engagement with the mating recesses, so that it is not possible to separate the tool once more. If it is attempted to separate the tool portion and the mounting portion, the resilient tabs are designed to break, so that the tool after separating the mounting portion and tool portion cannot be assembled once more.
  • the tool can be secured to the drive shaft of a motor both directly and indirectly.
  • the tool for example may be secured via a bayonet coupling placed on the inside of the second inner wall of the mounting portion.
  • the tool may be secured to the drive shaft by a thread, for example, wherein the tool is screwed onto the drive shaft, or wherein the drive shaft comprises jaws which grip a shaft which is mounted in the mounting portion.
  • the tool can be fastened to a drive plate, for example.
  • the drive plate is secured perpendicular to the axis of rotation.
  • the tool is fastened, for example, to the drive plate with hook and eyelet or bayonet couplings.
  • Other forms of indirect fastening of the tool involve an adapter to increase the distance from the motor unit to the tool.
  • a number of pins Along the periphery of the tool portion there are arranged a number of pins. Furthermore, along the periphery of the mounting portion there is devised a slot, in which the tool portion's pins are designed to engage when assembling the tool in order to secure the periphery of the tool portion to the mounting portion.
  • the periphery of the tool portion is secured to the periphery of the mounting portion. This helps ensure the stability of the tool, among other things because the periphery of the tool portion cannot flutter along the periphery of the tool during rotation. This helps ensure that the tool elements cannot fall off when the tool is in use.
  • At least one pin is placed between all the grooves, so that all parts of the tool portion are secured in the periphery.
  • the grooves give the tool portion a certain flexibility which helps ensure that the pins can easily be inserted into the slot and thereby help ensure an easy assembling of tool portion and mounting portion.
  • some pins may be located on the mounting portion, and other pins on the tool portion, with corresponding recesses on the other portion.
  • the slot may be an indentation along the periphery of the mounting portion, but it can also be formed by having a shoulder along the periphery beneath which the pins are secured.
  • the slot may follow the entire periphery all around or be interrupted, so as to create indentations in the mounting portion opposite the corresponding pins.
  • the slot is arranged in the bottom of the mounting portion or on a radially inner surface of an outer wall, which outer wall is substantially upright along the periphery of the inner bottom of the mounting portion.
  • the slot may be placed either on the mounting portion or the tool portion, and the pins in the corresponding portion.
  • one possible solution may be an outer wall along the periphery of the mounting portion.
  • the slot or the shoulder may be placed on the radial inside of the outer wall.
  • the tool portion with shapes other than a disk shape.
  • the surface of the tool portion is curved, such as a semicircle, a truncated cone, or a cylinder.
  • the bottom of the tool portion when assembled with the mounting portion is approximately perpendicular to the bottom of the mounting portion.
  • the slot or the shoulder may be placed directly in or on the bottom of the mounting portion.
  • the slats are placed in pairs along each side of a groove, including parallel to the grooves.
  • the slats help ensure the spacing between tool portion and mounting portion. This achieves greater stability of the tool.
  • the slats will help secure the position of the tool elements in the tool portion.
  • the slots for the tool elements may be closed at the periphery of the tool portion, and are formed as openings in the tool portion.
  • the tool elements are mounted by inserting them from the rear of the tool portion. This is done for the most part perpendicular to the bottom of the tool portion.
  • the slots may also be formed as slits extending in the tool portion from the periphery of the tool portion.
  • the tool elements can be shifted into the grooves from the periphery of the tool portion. This provides a faster and easier mounting of the tool elements.
  • the pins along the periphery of the tool portion will ensure that the tool portion, and thus also the tool elements, are fastened in the mounting portion of the tool. Thus, the tool elements cannot shift during use and thereby fall out of the tool.
  • At least one guide groove is placed in the first inner wall of the tool portion.
  • at least one guide pin in connection with the second inner wall of the mounting portion, so that the guide pin is designed to engage with the guide groove when assembling the tool portion and the mounting portion.
  • the placement of guide groove and guide pin is reversed, so that the second inner wall of the mounting portion comprises at least one guide groove, and at least one guide pin is arranged in connection with the first inner wall of the tool portion.
  • the tool becomes easier to assemble. Moreover, this ensures that the tool portion cannot be mounted wrong in the mounting portion.
  • the guide pins may be placed such that tool portion and mounting portion can be assembled in only one or several different ways upon rotation of the tool portion in relation to the mounting portion.
  • the bottom of the tool portion may be formed as a disk, a cylinder, a conical shape, or with a curved shape, such as a concave or convex shape.
  • tool portions other than disk shape will be preferred, just as a different configuration of the tool portion may be advantageous for non-flat workpieces undergoing grinding or polishing.
  • a concave configuration of the tool portion may be used for workpieces with spherical surface, and a conical or cylindrical configuration of the tool portion may be used for internal grinding or polishing of hollow workpieces.
  • the outer periphery of the tool has one of the following shapes: circular, oval or polygonal, such as triangular, rectangular, pentagonal, hexagonal, heptagonal, octagonal, and so on.
  • the tool provides flexibility during use. Often the tool will be circular or polygonal, but in certain cases other forms will be preferred, the choice of the tool shape being adapted to the grinding or polishing job.
  • Tool elements encompass grinding elements for grinding, sanding, polishing or similar work, where the grinding elements may be slotted.
  • Grinding elements are usual for grinding and slotted grinding elements achieve an improved grinding plane.
  • the tool rotates about a central axis, for which the edge portion of a number of tool elements is mounted at an angle to the outer surface of the tool portion and/or at an angle to the center axis.
  • the tool elements are mounted with an orientation for the most part perpendicular to the surface of the outer surface of the tool portion.
  • the tool elements are placed radially.
  • the tool elements are placed radially when the angle ⁇ (see FIG. 5 ) is approximately perpendicular in relation to the radial direction.
  • the tool elements can be placed at an angle ⁇ which departs from the perpendicular in relation to the surface.
  • the tool elements will have an angle ⁇ (see FIG. 5 ) which is not a right angle, but either larger or smaller than a right angle.
  • the tool elements are mounted substantially perpendicular to the surface, where the angle ⁇ (see FIG. 5 ) is a right angle in to the surface of the tool elements.
  • the tool elements can be placed with an angle which is both larger and smaller than a right angle, in which case the tool elements are mounted slanted in the tool.
  • Such a layout establishes a grinding disk for which the use of slotted grinding bodies is especially suitable for grinding of surface with profilings.
  • the slotted grinding bodies on a surface of a circular disk are in themselves known from previous apparatus where interchangeable tool elements are used.
  • the tool elements comprise support brushes which support the grinding elements, the grinding elements and/or the support brushes being secured in base pieces which are mounted in the grooves in the tool portion.
  • Grinding elements and support brushes can also be mounted each in their own base piece, so that the two base pieces engage with each other and thereby constitute a single base piece during use.
  • the tool elements are mounted in base pieces with an oversized bottom in relation to the grooves so that the base pieces are secured in the grooves when the mounting portion and the tool portion are assembled.
  • the tool elements will then protrude from the outer top side of the tool portion.
  • the tool can be swapped for a corresponding tool in event of wear or with a different type of machining unit when different jobs need to be undertaken in continuation of each other.
  • the motor unit may be a pneumatic variable speed motor or an electric motor.
  • the motor unit may be either small handheld units or large industrial machines, for example, with throughput of workpieces being ground or polished.
  • the tool according to embodiments of the present invention is characterized in that the tool elements of the tool comprise means of grinding, sanding, polishing and/or similar work.
  • a tool according to embodiments of the present invention will primarily find use in grinding and polishing jobs. Therefore, the tool elements will be means which are used for grinding, sanding, polishing or similar jobs. Such tool elements may be chosen with a layout which is known in itself from the previously mentioned industrial machines with interchangeable tool elements.
  • the tool will rotate about a central axis coinciding with the motor unit's drive shaft.
  • the tool will be a circular disk. Alternatively, one can use disks having an angular or other shape. The disk used will rotate about a central axis. This results in a tool with rotational symmetry. On the circular disk there is a flat surface, on which a disk-shaped grinding element or alternatively a polishing element can be mounted.
  • the tool element may be on a soft and yielding backing in the tool so as to adapt to different surface contours during the grinding.
  • the grinding element's slats are formed by slitting a grinding paper transversely to the longitudinal direction, so as to produce ribbons or slats, being mutually joined together at one end by means of an unbroken strip of grinding paper which is fastened in the base piece.
  • the free end consists of a number of parallel slats of grinding paper which extend for the most part perpendicular to the longitudinal direction of the profile.
  • support brushes will be placed in immediate proximity to the slats, so that they support the slats during the grinding.
  • the grinding or sanding effect is achieved as a consequence of the action of the slats when they sweep over a workpiece during the rotation of the tool.
  • the support brushes have, as the word implies, a function of supporting the grinding slats. However, the support brushes may also be made of a material so as to contribute to the grinding or sanding effect.
  • the support brushes are placed slightly behind the grinding bodies, so that they support the grinding bodies and thereby hold the grinding portion of the grinding bodies in against the surface being ground.
  • the support brushes furthermore ensure that the grinding bodies will never bend around the base or lay back across the surface of the grinding disk. It is an advantage that there is a certain distance from the surface of the grinding disk down to the surface being ground, so that ground-off material can be taken away and to reduce the risk that the surface of the grinding disk will come in contact with the ground-off surface.
  • the number of rows of support brushes may vary, depending on how much support the grinding bodies will have. This means that, for example, there may be three rows of support brushes behind each of the grinding bodies.
  • a grinding disk according to embodiments of the present invention has a longer lifetime than the commonly known flat or ring-shaped grinding disks.
  • the grinding bodies can be mounted in a backward curved arrangement with respect to the direction of rotation.
  • FIG. 1 shows a tool in perspective
  • FIG. 2 shows a possible tool element for use in the tool
  • FIG. 3 shows a tool in perspective from opposite angle
  • FIG. 4 shows the outer surface of the tool portion
  • FIG. 5 shows the inner surface of the tool portion
  • FIG. 6 shows the first inner wall of the tool portion with resilient tabs with barbs and guide grooves
  • FIG. 7 shows the mounting portion with guide grooves and recesses for locking the tool portion's resilient tabs.
  • FIG. 1 shows a tool 1 for machining of wood, metal or composite materials, for example.
  • the tool 1 consists of a tool portion 2 and a mounting portion 3 , which are joined together so that they secure a number of tool elements 4 .
  • the mounting portion 3 is configured to be fastened directly to a drive shaft 5 on a motor unit (not shown in FIG. 1 ).
  • FIG. 3 shows a tool 1 from a different angle. Here, one sees the mounting portion 3 , which is joined by a bayonet coupling 6 to the drive shaft 5 .
  • FIG. 4 shows the outer side of the tool portion, on which there are grooves 7 for tool elements 4 .
  • FIG. 5 shows the inner side of the tool portion.
  • a first inner wall 9 On the tool portion's inner bottom 8 is placed a first inner wall 9 .
  • the first inner wall 9 is circular.
  • the first inner wall 9 may have other shapes, as described above.
  • a series of openings there being 6 openings in the figures.
  • a resilient tab 10 In four of the openings there are arranged a resilient tab 10 .
  • the last two openings are guide grooves 11 .
  • FIG. 5 furthermore shows a series of slats 12 , which lie parallel with the grooves 7 for the tool elements. In this way, a slit is formed for fastening the tool elements 4 .
  • FIG. 6 shows an enlargement of the inside of the tool portion.
  • the resilient tabs 10 secured to the bottom of the tool portion 8 .
  • the surface of the resilient tab 10 is shifted slightly radially inward from the first inner wall 9 , yet always such that it remains in connection with the openings.
  • a barb or hook 15 is arranged at the top of the resilient tab, which forms the male part in a snap lock when assembling the mounting portion 3 and tool portion 2 .
  • the first inner wall 9 is cylindrical, but it can have other forms, as described above.
  • FIG. 7 shows the interior of the mounting portion 3 .
  • the second inner wall 17 is cylindrical, but may also have other forms, as described above.
  • a series of recesses 18 adapted in position to the tool portion's 2 resilient tabs 10 (see FIG. 6 ), and such that the recesses 18 constitute the female part in the snap lock when assembling the tool portion and the mounting portion.
  • guide pins 19 In connection with the mounting portion's 3 second inner cylindrical wall 17 there is placed guide pins 19 .
  • the guide pins are secured to the bottom 16 of the mounting portion 3 and to the mounting portion's second inner wall 17 .
  • the guide pins 19 extend radially outward from the mounting portion's inner wall 17 .
  • the guide pins 19 are placed so that they engage with the guide grooves 11 on the tool portion 2 when the mounting portion 3 and tool portion 2 are correctly assembled. If one tries to assemble the mounting portion 3 and tool portion 2 in an incorrect manner, the guide pins will abut against the tool portion's first inner wall 9 and prevent the mounting portion 3 and the tool portion 2 from being assembled.
  • an outer wall 20 which is directed toward the tool portion.
  • a slot 21 on the radially inner side of the outer wall 20 .
  • the slot 21 is placed such that the pins 14 of the tool portion (see FIG. 6 ) fit into the slot, whereupon the periphery of the tool portion 2 is locked firmly to the periphery of the mounting portion 3 .
  • the grooves 7 on the tool portion 2 for fastening of the tool elements 4 are configured as slits from the periphery of the tool portion. In this way, it is possible to change the tool elements in place from the periphery of the tool portion.
  • the grooves 7 are closed at the periphery and the tool elements 4 are mounted in the tool portion 2 by leading them out through the grooves 7 from the rear of the tool portion.
  • a bayonet socket 6 for fastening of the tool 1 to the drive shaft 5 . It is also possible to mount the tool 1 on the drive shaft of the machining unit by other means, as described above.
  • FIG. 2 shows an example of a tool element 4 which consists of a base piece 23 , in which is placed a brush 24 and a grinding or polishing element 25 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US16/305,667 2016-05-31 2017-05-31 Tool with tool elements Pending US20200324392A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DKPA201670391 2016-05-31
DKPA201670391 2016-05-31
PCT/DK2017/050180 WO2017207008A1 (fr) 2016-05-31 2017-05-31 Outil avec éléments d'outil

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CN (1) CN109689301A (fr)
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EP3463755A4 (fr) 2020-01-15
WO2017207008A1 (fr) 2017-12-07
CN109689301A (zh) 2019-04-26
CA3028819A1 (fr) 2017-12-07
EP3463755A1 (fr) 2019-04-10

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