EP3132892B1 - Multischleiferkit - Google Patents

Multischleiferkit Download PDF

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Publication number
EP3132892B1
EP3132892B1 EP16184802.3A EP16184802A EP3132892B1 EP 3132892 B1 EP3132892 B1 EP 3132892B1 EP 16184802 A EP16184802 A EP 16184802A EP 3132892 B1 EP3132892 B1 EP 3132892B1
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EP
European Patent Office
Prior art keywords
segment
sander
attachment
sanding pad
kit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16184802.3A
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English (en)
French (fr)
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EP3132892A2 (de
EP3132892A3 (de
Inventor
Tsz Kin Wong
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Techtronic Power Tools Technology Ltd
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Techtronic Power Tools Technology Ltd
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Publication date
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Publication of EP3132892A2 publication Critical patent/EP3132892A2/de
Publication of EP3132892A3 publication Critical patent/EP3132892A3/de
Application granted granted Critical
Publication of EP3132892B1 publication Critical patent/EP3132892B1/de
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Classifications

    • 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
    • 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
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • 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
    • B24B45/003—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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/055—Protective covers for the grinding wheel specially designed for portable grinding machines with oscillating tools
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/105—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with oscillating tools
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • This invention relates to electronic power tools, and in particular to power tools used to smooth surfaces by abrasion.
  • Sanders are used commonly in various applications such as indoor decorations and material processing to smooth surfaces by abrasion with sandpaper.
  • Sanders have a means to attach the sandpaper, for example a sanding pad to which the sandpaper can be adhered or otherwise secured, and a mechanism to move the sandpaper rapidly contained within a housing.
  • electronically powered sanders for different purposes. For example, an orbital sander is used where the sandpaper delivers a random-orbit action for fine sanding or where little material needs to be removed.
  • drywall sanders are used on the drywall and are usually designed with a particular emphasis on dust control to prevent generating a lot of dusts which contaminate the environment.
  • the present invention in one aspect, is a multi-sander kit containing a multi-sander and a sander attachment.
  • the multi-sander contains a casing, an electric motor located in the casing, and a driving shaft driven by the electric motor and protruding out of the casing. An end of the driving shaft is adapted to allow a sanding pad to connect thereto.
  • the casing further contains an interface adjacent to the end of the driving shaft.
  • the sander attachment is adapted to be detachably installed to the multi-sander by connecting the sander attachment to the interface.
  • the sander attachment covers at least partially the driving shaft or the sanding pad when the sander attachment and the sanding pad are installed to the multi-sander.
  • the casing further includes a cylindrical portion adjacent to the end of the driving shaft; the interface configured on a circumferential face of the cylindrical portion.
  • the sander attachment is chosen from the group consisted of a random orbital (RO) attachment and a drywall attachment.
  • the RO attachment is formed to cover only a part of the sanding pad when the sander attachment and the sanding pad are installed to the multi-sander.
  • EP-A-1674202 which is the basis for the preamble of appended claim 1, describes a modular sander-casing architecture.
  • EP-A-2479000 describes a dust-collecting cover for disc grinder.
  • JP-A-2012115947 describes a grinding tool.
  • US-A-2009/209184 describes a hand-held power tool for a rotating tool with guard.
  • US-A-2009/215365 describes a sanding tool with pivotally coupled head assembly.
  • the RO attachment includes a first segment having a substantially arc shape; and a second segment having a substantially arc shape.
  • the first segment and the second segment are adapted to be connected to each other in a head-to-tail manner, so as to circumferentially enclosing at least a part of the sanding pad when the sander attachment and the sanding pad are installed to the multi-sander.
  • the first segment and the second segment each has a first end and a second end; the first end of the first segment capable of connecting to the first end of the second segment.
  • the second end of the first segment is capable of connecting to the second end of the second segment.
  • the first end of the first segment is capable of connecting to the first end of the second segment via a pin-knuckle structure.
  • the second end of the first segment is capable of connecting to the second end of the second segment via a latch.
  • the interface is first geometric patterns formed on the circumferential face of the cylindrical portion.
  • the first segment and the second segment contain second geometric patterns complementing the first geometric patterns whereby the first segment and the second segment are adapted to connect to the interface.
  • the first and second geometric patterns contain grooves and protrusions extending along a circumferential direction.
  • the second geometric patterns comprise at least one protrusion extending inwardly to the center of the sanding pad.
  • the second geometric patterns contain a plurality of protrusions, which extend inwardly to different extents, or which have different spans along the circumferential direction.
  • one of the protrusions is placed between a lower part of the casing and the sanding pad when the sander attachment and the sanding pad are installed to the multi-sander.
  • the drywall attachment is formed to fully cover the sanding pad on a circumferential direction when the sander attachment and the sanding pad are installed to the multi-sander.
  • the drywall attachment further contains a rim of brush which fully covers the sanding pad on the circumferential direction.
  • the rim of brush has a larger dimension compared to the sanding pad along the axial direction of the driving shaft.
  • the rim of brush contains nylon strip brushes.
  • the drywall attachment includes a first segment having a substantially arc shape, a second segment having a substantially arc shape; and a third segment having a substantially arc shape.
  • the first segment, the second segment and the third segment are adapted to be connected to each other in a head-to-tail manner, so as to fully cover the sanding pad on a circumferential direction when the sander attachment and the sanding pad are installed to the multi-sander.
  • At least two of the first segment, the second segment and the third segment are connected to each other via a pin-knuckle structure or a hook-tab structure.
  • the interface is first geometric patterns formed on the circumferential face of the cylindrical portion.
  • the first segment, the second segment and the third segment contain second geometric patterns complementing the first geometric patterns whereby the first segment, the second segment and the third segment are adapted to connect to the interface.
  • the first and second geometric patterns contain grooves and protrusions extending along a circumferential direction.
  • the second geometric patterns contain at least one protrusion extending inwardly to the center of the sanding pad.
  • the second geometric patterns contain a plurality of protrusions, which extend inwardly to different extents, or which have different spans along the circumferential direction.
  • the sanding pad has a substantial truncated cone shape.
  • the sanding pad has a polygonal cross-sectional shape.
  • the sanding pad has a rectangular cross-sectional shape.
  • the multi-sander provided in the present invention enables a single sander unit to be used with more than one optional accessory.
  • the interchangeable design of the multi-sander allows the user to change their sander from an orbital sander to a drywall sander or reverse by replacing / attaching / removing the bottom parts.
  • the sander can be used as a normal sander for sanding wood surface, etc.
  • drywall sander mode there is strip brush surrounding the sanding pad which can help to prevent dust from spreading out to the environment.
  • Such a design is particularly suitable for working on drywall with the sander connected to a suction source, e.g. a vacuum source.
  • Another advantage of the present invention is that the user's expense involved in obtaining the sander for multiple purposes can be reduced.
  • a user does not have to buy two separate sander units for different purposes such as drywall sanding and orbital sanding. Rather, the user could according to his requirement purchase the random orbital attachment, the drywall attachment, or both, for installing to the same multi-sander unit.
  • Other types of attachments beside the random orbital attachment and the drywall attachment may also be designed to be used in the multi-sander. From the user's point of view, they do not need to buy a dedicated drywall sander for drywall work.
  • an embodiment of the present invention is a multi-sander which is capable of installing various attachments (not shown) to achieve different functions.
  • the multi-sander 20 includes a casing which is consisted of an upper part 24, a middle part 32 and a lower part 26.
  • the upper part 24 has a substantial water droplet shape, and is suitable for a user to hold it in order to manipulate the multi-sander 20.
  • the middle part 32 and lower part 26 both have round shape cross-sections in the horizontal planes, with the middle part 32 connecting the upper part 24 and the lower part 26 together.
  • a sanding pad 34 which has a truncated cone shape.
  • the sanding pad 34 is used to attach a sandpaper (not shown) for the sanding operation.
  • a sandpaper (not shown) for the sanding operation.
  • the lower part 26 of the casing is also configured with an exhaust port 38 which is adapted to be connected to an adapter 30.
  • the other end of the adapter 30 away from the exhaust port 38 is adapted to be connected to an external suction source, for example a vacuum source, so as to suction the dust generated during the sanding operation, as those skilled in the art would understand.
  • the casing of the multi-sander 20 further contains an interface on the lower part 26 and adjacent to the end of the driving shaft to which the sanding pad 34 is connected.
  • the interface is used for connecting various sanding attachments (which will be described by examples in details below) to the multi-sander 20 to perform different task.
  • the interface contains at least a groove 42 configured on a rim portion 36 of the lower part 26 and extending along the circumferential direction, and a stop face 40 which forms an angle with the rim portion 36.
  • the groove 42, the rim portion 36, the stop face 40 and the protruding rim 48 are part of the first geometric patterns which form the interface on the sander casing.
  • the sanding pad 44 is shown to be removed from the multi-sander 20, as the sanding pad 44 is adapted to be mounted to the sander 20 via screw connections.
  • at the bottom of the sander 20 there is a pad socket 50 which is drivably connected to the driving shaft of the sander 20.
  • Also, on the sanding pad 34 but radially outer than the through holes 46 are dust extraction holes 44 through which dusts generated during sanding operation can pass through with air stream generated by the suction source.
  • Figs. 4-5 show the multi-sander described above with a random orbit (RO) attachment installed to the sander.
  • the sanding pad 34 is also installed in the illustrated sander.
  • the RO attachment includes a first segment 52, and a second segment 54.
  • the first segment 52 and the second segment 54 are in substantial arc shapes, and are configured in head-to-tail manner that is every end of the first segment 52 is connected to an end of the second segment 54 so that the first segment 52 and the second segment 54 adjoin each other along the circumferential direction.
  • the first segment 52 and the second segment 54 together form a complete loop.
  • the RO attachment fully covers the sanding pad 34 on a circumferential direction, but only partially covers the sanding pad 34 along the vertical direction.
  • a skirt 58 consisted of two separate pieces extending respectively from the first segment 52 and the second segment 54 is arranged to cover only a part of the sanding pad 34 along the vertical direction (that is the axial direction of the driving shaft of the sander).
  • FIG. 6 the RO attachment in its disassembled state and removed from the sander 20 is shown to expose the sanding pad 34 installed on the sander 20.
  • Each of the first segment 52 and the second segment 54 is in a half-circle shape, which together form a complete loop.
  • On the first segment 52 there is a stop face 60 which complements the stop face 40 on the sander 20.
  • On both the first segment 52 and the second segment 54 there are formed first protrusions 71, second protrusions 72, and third protrusions 66, all of which extend inwardly along the radial direction of the first segment 52 and the second segment 54.
  • first protrusions 71 complement the groove 42 on the sander casing described previously, and have the smallest spans along the circumferential direction.
  • the second protrusions 72 are adapted to be inserted between the protruding rim 48 (not shown, but see Fig. 3 ) and another circular surface on the sander casing.
  • the second protrusions 72 have a larger span along the circumferential direction when compared to the first protrusions 71 .
  • the third protrusions 66 are adapted to be inserted into the space between the lower part of the sander 20 and the sanding pad 34.
  • the second protrusions 72 actually form a complete loop and so are the third protrusions 66.
  • the first protrusions 71, the second protrusions 72, and the third protrusions 66 are part of the second geometric patterns which are designed to complement the first geometric patterns described above to connect the RO attachment including the first segment 52 and the second segment 54 to the interface of the sander casing.
  • the first segment 52 and the second segment 54 each have a first end and a second end as shown in Fig. 6 .
  • a knuckle (not shown) which is configured to receive a pin 68 formed on a first end of the second segment 54 so as to pivotally connect the first ends of the segment 52 and the second segment 54.
  • the latch 56 described above contains a hook 62 pivotally connected to a second end of the first segment 52, and a recessed face 64 formed on a second end of the second segment 54 which is adapted to hold the hook 62 and thus close the latch 56.
  • Fig. 7 shows the internal structure of the sander described above with the sanding pad 34 and the RO attachment installed.
  • the motor 76 is connected to a driving shaft 74 where the end of the driving shaft 74 drivably connects to the sanding pad 34.
  • the first segment and the second segment of the RO attachment on one end are connected by the pin 68 and knuckle 70, and on another end are connected by the latch 56.
  • the RO attachment also contains a skirt 58 which only partially covers the sanding pad 34 on the vertical direction.
  • FIGs. 8a-8d show how the sander according to the present invention may be installed with a RO attachment by the user without using any external tools.
  • a multi-sander 20 with only a sanding pad 34 installed as shown in Fig. 8a the user firstly connects the first segment 52 of the RO attachment by aligning it and pushing it along the direction of the arrow 78 toward the lower part of the sander casing.
  • the above mentioned grooves and protrusions on the first segment 52 fit to their respective counterpart on the interface of the sander 20 so that the first segment 52 is installed precisely in the intended location.
  • Fig. 8a show how the sander according to the present invention may be installed with a RO attachment by the user without using any external tools.
  • the user connects first ends of the first segment 52 and the second segment 54 together by moving the second segment 54 along the direction shown by arrow 80 toward the sander casing, and inserting the pin 68 downwardly along the direction shown by arrow 69 into the first end of the first segment 52 into the knuckle 70 on the first end of the second segment 54.
  • the second segment 54 is then connected to the first segment 52 at one point and able to pivot with respect to the pin 68.
  • Figs. 9-10 show the multi-sander described above with a drywall attachment installed to the sander.
  • the sanding pad 34 is also installed in the illustrated sander.
  • the drywall attachment includes a first segment 152, a second segment 154, and a third segment 153.
  • the first segment 152, the second segment 154 and the third segment 153 are configured in head-to-tail manner so that the first segment 152, the second segment 154 and the third segment 153 adjoin each other along the circumferential direction.
  • the first segment 152, the second segment 154 and the third segment 153 together form a complete loop.
  • first segment 152 the second segment 154 themselves would be able to close the loop since they are adapted to be connected to each other on both ends, but the structure formed by only first segment 152 and second segment 154 contains a recess part which is to be complemented by the third segment 153 to form a complete circular shape.
  • the first type of connection is the pin-knuckle connection consisted of a pin 168 and a knuckle 170 similar to the pin-knuckle described previously.
  • the second type of the connection is a hook-tab structure 157, which will be described in more details later.
  • the drywall attachment not only fully covers the sanding pad 34 on a circumferential direction, but also fully covers the sanding pad 34 along the vertical direction by configuring a rim of brush 186.
  • the rim of brush 186 extends at least the same distance along the vertical direction compared to the sanding pad 34 and when the sander 20 is placed on a flat work surface the rim of brush 186 directly contacts the work surface.
  • FIG. 11 the drywall attachment in its disassembled state and removed from the sander 20 is shown to expose the sanding pad 34 installed on the sander 20.
  • Each of the first segment 152 and the second segment 154 is in a half-circle shape.
  • the first segment 152 and the second segment 154 themselves could form a complete loop, there is a recess part on the structure formed as such and the third segment 153 must be installed to form a complete structure.
  • only installing the first segment 152 and the second segment 154 results in a rim of brush present for a part of the circumferential direction, and only with the third segment 153 the full circle of rim of brush would be made.
  • first protrusion 171 As well as the second protrusion 172. Both the first protrusion 171 and the second protrusions 172 extend inwardly along the radial direction of the first segment 152, the third segment 153, and the second segment 154. However, the spans of the first protrusion 171 and the second protrusions 172 along the circumferential direction are not the same.
  • the first protrusion 171 on the third segment 153 complements the groove 42 on the sander casing described previously, and has the smaller spans along the circumferential direction.
  • the second protrusions 172 are adapted to be inserted between the protruding rim 48 (not shown, but see Fig. 3 ) and another circular surface on the sander casing.
  • the second protrusions 172 have a larger span along the circumferential direction when compared to the first protrusion 171.
  • the second protrusions 172 actually form a complete loop.
  • the first protrusion 171 and the second protrusions 172 are part of the second geometric patterns which are designed to complement the first geometric patterns described above to connect the drywall attachment including the first segment 152 and the second segment 154 to the interface of the sander casing.
  • the first segment 152, the second segment 154 and the third segment 153 each has a first end and a second end as shown in Fig. 11 . They are also in substantial arc shapes.
  • a knuckle (not shown) which is configured to receive a pin 168 formed on a first end of the second segment 154 so as to pivotally connect the first ends of the segment 152 and the second segment 154.
  • the latch 156 described above contains a hook 162 pivotally connected to a second end of the first segment 152, and a recessed face 164 formed on a second end of the second segment 154 which is adapted to hold the hook 162 and thus close the latch 156.
  • first segment 152 and the second segment 154 can be connected in a head-and-tail manner.
  • third segment 153 features hook-tab structures for connecting to both the first segment 152 and the second segment 154.
  • tabs 161 On the two ends of the third segment 153, there are formed tabs 161 which contain small perforations.
  • the hooks 159 are not located on the second ends of the first segment 152 and the second segment 154 as mentioned above, but rather they are placed at a predetermined distance away from the second end of the first segment 152 or the second segment 154 so that the circumferential span between the hooks 159 is made to be able to accommodate the third segment 153.
  • Fig. 12 shows the internal structure of the sander described above with the sanding pad 34 and the drywall attachment installed.
  • the motor 76 is connected to a driving shaft 74 where the end of the driving shaft 74 drivably connects to the sanding pad 34.
  • the first segment and the second segment of the drywall attachment on one end are connected by the pin 168 and knuckle 170, and on another end are connected by the latch 156.
  • the second protrusions 172 On each of the first segment and the second segment there is formed the second protrusions 172.
  • the third segment 153 there is formed a first protrusion 171.
  • the first protrusion 171 and the second protrusions 172 match with the corresponding complementing shape of the interface on the sander casing as described above to firmly but detachably secure the drywall attachment to the sander casing. Since on each one of the first segment 152, the second segment 154 and the third segment 153 there are connected a rim of brush, the three segments together provide a full circle of rim of brush to prevent dust from going out of the sanding operation region.
  • the rim of brush is preferably nylon strip brushes.
  • Figs. 13a-13d show how the sander according to the present invention may be installed with a drywall attachment by the user without using any external tools.
  • a multi-sander 20 with only a sanding pad 34 installed as shown in Fig. 13a the user firstly connects the first segment 152 of the RO attachment by aligning it and pushing it along the direction of the arrow 178 toward the lower part of the sander casing.
  • the above mentioned grooves and protrusions on the first segment 152 fit to their respective counterpart on the interface of the sander 20 so that the first segment 152 is installed precisely in the intended location.
  • Fig. 13a-13d show how the sander according to the present invention may be installed with a drywall attachment by the user without using any external tools.
  • the user connects first ends of the first segment 152 and the second segment 154 together by moving the second segment 154 along the direction shown by arrow 180 toward the sander casing, and inserting the pin 168 downwardly along the direction shown by arrow 169 into the first end of the first segment 152 into the knuckle 170 on the first end of the second segment 154.
  • the second segment 154 is then connected to the first segment 152 at one point and able to pivot with respect to the pin 168.
  • the user as shown in Fig. 13c closes the second segment 154 by rotating around the pin-knuckle structure above so that the second segment 154 moves in a rotating direction indicated by arrow 182 and finally close fully fit on the lower part of the sander casing.
  • the user then closes the latch 156 by moving it along the direction indicated by arrow 184 to securely connect the second ends of the first segment 152 and the second segment 154 together.
  • the second geometric patterns on the second segment 154 also complement the first geometric patterns on the interface on the sander casing as described above to firmly but detachably secure the drywall attachment to the sander casing.
  • the user then installs the third segment 153 to the sander casing by fitting it to the lower part of the sander casing along the direction indicated by the arrow 163.
  • one end of the third segment 153 is secured to the first segment 152 by locking the tab 161 on this end to the hook 159 on the first segment 152.
  • the user in the next step shown in Fig. 13e secures the other end of the third segment 153 in a similar manner by locking the tab 161 to the hook 159 on the second segment 154.
  • the installation of the drywall attachment is complete as shown in Fig. 13f .
  • the sanding pad shown above has a circular cross-sectional shape, this should not be construed as a limitation to the present invention.
  • One skilled art should realize that other shapes of sanding pad, for example a triangular one or a rectangular one as commonly seen in the field, can also be used together with the sander attachment provided by the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Claims (11)

  1. Multischleifersatz, der Folgendes umfasst:
    einen Multischleifer (20), der ein Gehäuse, einen Elektromotor, der in dem Gehäuse angeordnet ist, und eine Antriebswelle, die durch den Elektromotor angetrieben wird und aus dem Gehäuse vorspringt, umfasst, wobei ein Ende der Antriebswelle angepasst ist, um zu ermöglichen, dass ein Schleifkissen (34) mit demselben verbunden wird, wobei das Gehäuse ferner eine Anschlussstelle angrenzend an das Ende der Antriebswelle umfasst, wobei das Gehäuse ferner einen zylindrischen Abschnitt angrenzend an das Ende der Antriebswelle umfasst, wobei die Anschlussstelle erste geometrische Muster sind, die auf einer Umfangsfläche des zylindrischen Abschnitts geformt sind,
    wobei der Multischleifersatz ferner einen Schleifervorsatz umfasst, wobei der Multischleifer angepasst ist, um an der Anschlussstelle lösbar mit dem Schleifervorsatz verbunden zu werden, wobei der Multischleifersatz dadurch gekennzeichnet ist, dass der Schleifervorsatz aus einer Gruppe von Schleifervorsätzen ausgewählt ist, die einen Exzenter- (RO-) Vorsatz und einen Trockenbauwand-Vorsatz zum Durchführen von Exzenter- (RO-) Schleifen beziehungsweise Trockenbauwand-Schleifen umfasst,
    wobei der RO-Vorsatz Folgendes umfasst:
    a) ein erstes Segment (52, 152), das im Wesentlichen eine Bogenform aufweist, und
    b) ein zweites Segment (54, 154), das im Wesentlichen eine Bogenform aufweist,
    wobei das erste Segment und das zweite Segment angepasst sind, um miteinander auf eine Kopf-an-Fuß-Weise verbunden zu werden, um so mindestens einen Teil des Schleifkissens (34) umlaufend zu umschließen, wenn der Schleifervorsatz und das Schleifkissen an dem Multischleifer (20) installiert sind,
    und wobei das erste Segment (52, 152) und das zweite Segment (54, 154) jeweils ein erstes Ende und ein zweites Ende aufweisen, wobei das erste Ende des ersten Segments dazu in der Lage ist, mit dem ersten Ende des zweiten Segments verbunden zu werden, das zweite Ende des ersten Segments dazu in der Lage ist, mit dem zweiten Ende des zweiten Segments verbunden zu werden, und wobei das erste Ende des ersten Segments dazu in der Lage ist, über eine Zapfen-Gelenk-Struktur mit dem ersten Ende des zweiten Segments verbunden zu werden, und wobei das zweite Ende des ersten Segments dazu in der Lage ist, über eine Klinke (56) mit dem zweiten Ende des zweiten Segments verbunden zu werden,
    und wobei das erste Segment (52, 152) und das zweite Segment (54, 154) zweite geometrische Muster umfassen, welche die ersten geometrischen Muster ergänzen, wodurch das erste Segment und das zweite Segment angepasst sind, um mit der Anschlussstelle verbunden zu werden, und
    wobei der Trockenbauwand-Vorsatz Folgendes umfasst:
    a) ein erstes Segment (52, 152), das im Wesentlichen eine Bogenform aufweist,
    b) ein zweites Segment (54, 154), das im Wesentlichen eine Bogenform aufweist, und
    c) ein drittes Segment (153), das im Wesentlichen eine Bogenform aufweist,
    wobei das erste Segment, das zweite Segment und das dritte Segment angepasst sind, um miteinander auf eine Kopf-an-Fuß-Weise verbunden zu werden, um so das Schleifkissen (34) in einer Umfangsrichtung zu umschließen, wenn der Schleifervorsatz und das Schleifkissen an dem Multischleifer (20) installiert sind, wobei mindestens zwei von dem ersten Segment, dem zweiten Segment und dem dritten Segment über eine Zapfen-Gelenk-Struktur oder eine Haken-Lasche-Struktur miteinander verbunden sind, und
    wobei das erste Segment (52, 152), das zweite Segment (54, 154) und das dritte Segment (153) zweite geometrische Muster umfassen, welche die ersten geometrischen Muster ergänzen, wodurch das erste Segment, das zweite Segment und das dritte Segment angepasst sind, um mit der Anschlussstelle verbunden zu werden, und
    wobei die ersten und die zweiten geometrischen Muster Rillen (42) und Vorsprünge (71, 72, 66, 171, 172) umfassen, die sich entlang einer Umfangsrichtung erstrecken.
  2. Multischleifersatz nach Anspruch 1, wobei die zweiten geometrischen Muster mindestens einen Vorsprung (71, 72, 66, 171, 172) umfassen, der sich nach innen zur Mitte des Schleifkissens (34) erstreckt.
  3. Multischleifersatz nach Anspruch 1 oder 2, wobei die zweiten geometrischen Muster eine Vielzahl von Vorsprüngen (71, 72, 66, 171, 172) umfassen, die sich in unterschiedlichen Ausmaßen nach innen erstrecken oder die unterschiedliche Spannweiten entlang der Umfangsrichtung aufweisen.
  4. Multischleifersatz nach einem der Ansprüche 1 bis 3, wobei einer der Vorsprünge zwischen einem unteren Teil (26) des Gehäuses und dem Schleifkissen platziert ist, wenn der Schleifervorsatz und das Schleifkissen an dem Multischleifer (20) installiert sind.
  5. Multischleifersatz nach Anspruch 1, wobei der Trockenbauwand-Aufsatz so geformt ist, dass er das Schleifkissen (34) in einer Umfangsrichtung vollständig abdeckt, wenn der Schleifervorsatz und das Schleifkissen an dem Multischleifer (20) installiert sind.
  6. Multischleifersatz nach Anspruch 1 oder Anspruch 5, wobei der Trockenbauwand-Aufsatz ferner einen Bürstenkranz umfasst, der das Schleifkissen (34) in der Umfangsrichtung vollständig abdeckt.
  7. Multischleifersatz nach Anspruch 6, wobei der Bürstenkranz, verglichen mit dem Schleifkissen, eine größere Abmessung entlang der Axialrichtung der Antriebswelle aufweist.
  8. Multischleifersatz nach Anspruch 6 oder 7, wobei der Bürstenkranz Nylonbandbürsten umfasst.
  9. Multischleifersatz nach einem der vorhergehenden Ansprüche, wobei das Schleifkissen (34) eine im Wesentlichen abgestumpfte Kegelform aufweist.
  10. Multischleifersatz nach einem der Ansprüche 1 bis 8, wobei das Schleifkissen eine vieleckige Querschnittsform aufweist.
  11. Multischleifersatz nach Anspruch 10, wobei das Schleifkissen eine rechteckige Querschnittsform aufweist.
EP16184802.3A 2015-08-20 2016-08-18 Multischleiferkit Active EP3132892B1 (de)

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EP4289552A1 (de) * 2019-10-23 2023-12-13 Black & Decker, Inc. Stangenschleifmaschine
EP3812091B1 (de) 2019-10-23 2023-05-10 Black & Decker Inc. Stabschleifmaschine
EP3812089A1 (de) 2019-10-23 2021-04-28 Black & Decker Inc. Stabschleifmaschine
CN111546159B (zh) * 2020-06-08 2021-06-25 上海高仙自动化科技发展有限公司 抛光头组件及石材抛光机器人
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool

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EP3132892A3 (de) 2017-04-19
CN106466798A (zh) 2017-03-01

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