WO2023033981A1 - Backup pad construction and use thereof - Google Patents
Backup pad construction and use thereof Download PDFInfo
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- WO2023033981A1 WO2023033981A1 PCT/US2022/039364 US2022039364W WO2023033981A1 WO 2023033981 A1 WO2023033981 A1 WO 2023033981A1 US 2022039364 W US2022039364 W US 2022039364W WO 2023033981 A1 WO2023033981 A1 WO 2023033981A1
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- WIPO (PCT)
- Prior art keywords
- centerpost
- backup pad
- kit
- coupling
- feature
- Prior art date
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- 238000010276 construction Methods 0.000 title description 2
- 238000000034 method Methods 0.000 claims description 77
- 230000008878 coupling Effects 0.000 claims description 64
- 238000010168 coupling process Methods 0.000 claims description 64
- 238000005859 coupling reaction Methods 0.000 claims description 64
- 230000007246 mechanism Effects 0.000 claims description 34
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- 230000009977 dual effect Effects 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims 1
- 238000013461 design Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
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- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
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- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004905 finger nail Anatomy 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
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- 229920000728 polyester Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- 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
Definitions
- Grinding tools are known for use in industrial surface modification applications. They are used with, for example, coated abrasive discs, nonwoven discs or bonded abrasive discs. Grinding tools often couple to abrasive discs through a BUP (“back up pad”) which can help even out a force distribution on an abrasive article.
- BUP back up pad
- BUP or “backup pad”
- BUP attachment designs that can, for example, interchangeably operate with or without a center post, providing more flexibility and a reduced number of products required by a consumer.
- a backup pad assembly includes a backup pad with a cavity and a centerpost that is coupleable to the backup pad.
- the backup pad is configured to couple to a tool in a first configuration, without the centerpost, and in a second configuration, with the centerpost.
- FIGS. 1A-1B illustrate an electric grinder which may benefit from embodiments herein.
- FIGS. 2A-2F illustrate traditional backup pad and attachment configurations.
- FIG. 3 depicts an interchangeable backup pad attachment system in accordance with embodiments herein.
- FIGS. 4A-4C illustrate centerpost connection mechanisms in accordance with embodiments herein.
- FIGS. 5A and 5B illustrate views of alternative connection mechanisms in accordance with embodiments herein.
- FIG. 6 illustrates a schematic of an abrading system in accordance with embodiments herein.
- FIGS. 7 A and 7B illustrate methods of using embodiments described herein.
- FIGS. 8A-8F illustrate interchangeable backup pad attachment systems in accordance with embodiments herein.
- FIG. 9 illustrates a center post connection mechanism in accordance with embodiments herein.
- FIGS 10 A- 10C illustrate interchangeable backup pad attachment systems in accordance with embodiments herein.
- FIGS. 11A-11D illustrate different embodiments of center post connection mechanisms.
- FIGS. 1A-1B illustrate an electric grinder which may benefit from embodiments herein.
- Electric grinder 100 includes a motor (not shown in FIGS. 1A-1B) which drives rotation of an abrasive article 120 which is coupled to a backup pad 110. While electric grinders 100 are illustrated, tools using pneumatic or other power sources may also benefit from backup pad (BUP) attachment mechanisms described herein. Additionally, while the depicted rotary grinder is intended to be used handheld, robot-mounted or cart-mounted (e.g., floor sanders) are also within the scope of the present disclosure. Although the presently disclosed accessory attachment assembly is described for rotary tools, systems and methods herein may apply to BUP usage in other tools.
- BUP backup pad
- BUP 110 may, generally, comprise a compressible member, in some embodiments, made of a resilient material with a stiffness suitable for the desired application, as known in the art.
- BUP 110 may be made of resins, constructed through injection molding, such as nylon, polyester, polypropylene, blends thereof or other suitable materials. The shape and size of BUP 110 may also be selected based on a selected abrasive tool 100 or abrasive application.
- FIGS. 2A-2F illustrate traditional backup pad and attachment configurations.
- BUPs 200, 250 are each configured to couple to an abrasive tool, for example by receiving a drive shaft at receiving point 210, which may be threaded or alternate quick change or other suitable attachment system.
- FIGS. 2A-2C illustrate a traditional BUP 200 with a centerpost 220
- FIGS. 2D-2F illustrate a traditional BUP 250 without a centerpost.
- BUPs 200, 250 are offered as separate products, with a centerpost 220 being permanently coupled to a BUP 200, for example using a molded-in design, welding, adhesive, or another suitable method.
- a centerpost allows for a grinder, such as grinder 100, to operate at a higher operating speed and reducing shifting or “walking” of the abrasive article on the BUP, with centerpost 220 serving to stabilize and center an abrasive disc coupled to BUP 200.
- centerpost 220 can be seen extending beyond the plane of an abrasive article, as illustrated in FIG. 2C, it can limit the functional angle at which an abrasive tool can approach a worksurface, depending on the height of centerpost 220.
- centerposts are permanently adhered to a BUP, as illustrated in FIG. 2B, where centerpost 220 is adhered to an attachment side 230 of BUP 200.
- Attachment side 230, 260 may be configured to engage directly with an abrasive article 240, 270. As illustrated in FIGS. 2B, 2E, attachment side 230, 260 includes protrusions that engage a nonwoven abrasive article 240, 270, through a hook-and-loop-like fastener system. However, other suitable abrasive article attachment systems are envisioned.
- BUPs are intended to be used for multiple abrasive operations, it is desired to have one BUP that can functionally operate with a centerpost, as illustrated in FIGS. 2A- 2C and without a centerpost 2D-2F.
- a solution is desired that allows for a single BUP to change between a centerpost configuration and a centerpost-free configuration. Such a solution could reduce manufacturing complexity, reduces a number of products a customer needs to purchase, and provides an easy method for switching between configurations.
- FIG. 3 depicts an interchangeable backup pad attachment system in accordance with embodiments herein.
- FIG. 3 illustrates a BUP system 300 that includes a BUP 310, that receives a driveshaft of a tool through aperture 308.
- BUP 310 also includes a cavity 302 sized to receive a fastener 320.
- fastener 320 is illustrated in FIG. 3 as a hex-nut, other suitable removeable fasteners are also envisioned, such as square nuts.
- threads are molded into the BUP.
- it is desired that cavity 302 and fastener are selected to fit commonly available fasteners, such as hex-nuts, so that specialized components are not required.
- fastener is custom- designed to fit cavity 302.
- cavity 302 is not circular in shape, or includes at least one comer, such that rotation of a tool drive shaft drives rotation of BUP 310 and fastener 320 at the same rate.
- BUP system 300 also includes a removeable centerpost 330.
- Cavity 302 may include receiving features 304 sized to receive a centerpost feature 332. Centerpost feature 332 may be received by, or couple to, receiving feature 304 and, once received, maintain position such that, when BUP 310 is engaged with a worksurface, centerpost 330 maintains its position with respect to BUP 310.
- Centerpost feature 332 may engage with receiving feature 304 as a snap, latch, protrusion / aperture pairing, friction, or any other suitable retaining feature, some of which are illustrated herein as examples. However, it is contemplated that other fastening mechanisms may be used.
- a nonwoven or coated abrasive article may attach to a surface of BUP 310, for example using the 3M Dual LockTM, a molded T-hook system or another suitable system.
- the axial position of the backup pad is fixed with respect to the rotary shaft of the tool by virtue of the design of the tool from the manufacturer.
- manufacturers may provide a metal washer to be sandwiched in between the backup pad and the tool, such metal washers are designed merely to mitigate heat transfer to prevent seizing of the connected components that might cause the backup pad to fuse to the rotary shaft (and therefore be difficult to unscrew) and to reduce heat transfer into other components of the tool.
- FIGS. 4A-4C illustrate centerpost connection systems in accordance with embodiments herein.
- System 400 includes a threaded connection between a BUP 410, a fastener 420 and centerpost 430.
- all three components - BUP 410, fastener 420, and centerpost 430 - couple to a threaded drive shaft 402.
- centerpost 430 may couple directly to BUP 410 and / or fastener 420.
- Centerpost 430 includes a removal feature 432, which, in some embodiments, may release a mechanical fastening between centerpost 430 and BUP 410.
- Removal feature 432 may be sized to receive, for example, a screwdriver, coin, or even a user’s fingernail. With sufficient application of torque, a mechanical fastening may be released.
- centerpost 450 fastens to a BUP using a snap feature 452.
- Snap feature 452 in the illustrated embodiment, includes a protrusion extending from the BUP which is received by an aperture in centerpost 450.
- a release mechanism 454 may allow for removal of centerpost 450, for example using a tool to gain leverage and release snap 452. While only one snap feature 452 is illustrated in FIG. 4B, it is contemplated that, in some embodiments, more snaps may be located about a circumference of centerpost 450.
- a backup pad 470 includes a plurality of snap features 472 that, as illustrated in FIG. 4C, include a protrusion from BUP 470 received by an aperture or cavity of centerpost 480. Snap features 472 may lock into a side of centerpost 480 that opposes BUP 470. As illustrated in FIG. 4C, snap features 472 may allow some sliding or rotation to improve a lock between BUP 470 and centerpost 480. A removal feature 482 may be present on centerpost 480 to allow for easy removal of centerpost 480 from BUP 470.
- FIGS. 5A and 5B illustrate views of alternative connection mechanisms in accordance with embodiments herein.
- FIGS. 5A-1 and 5B-1 illustrate top views (as seen by a user, when on a grinding tool) of a BUP assembly 500, 550, respectively.
- FIGS. 5A-2 and 5B-2 illustrate perspective views of BUP assemblies 500, 550 with centerposts 520, 570 engaged.
- FIGS. 5A-3 and 5B-3 illustrate exploded views of BUP assemblies 500 and 550.
- BUP assembly 550 includes a centerpost 520 that is received over a fastener 510, such as a threaded fastener.
- An abrasive article 530 is attached to a receiving side of BUP 500.
- Fastener 510 is received within a cavity 504.
- Centerpost 520 may also have a portion 522 that can be received by cavity 504, in a receiving portion 506. Latches, snaps, or other attachment mechnaisms are expressly contemplated for coupling portion 522 to receiver 506.
- Fastener 510 may be integral to BUP 500, or centerpost 520, in some embodiments. However, it may be preferred, for some embodiments, for centerpost 520 to be formed of a different material than fastener 510.
- fastener 510 may be metal, for resiliency, while centerpost 520 may be plastic, or another material less likely to leave scratches in the worksurface.
- a drive shaft of a tool may be received, through BUP 500.
- BUP 500 may include internal threading to receive a threaded drive shaft tool.
- Fastener 510 may also have internal threading, such that it is received on the drive shaft with BUP 500 such that, as drive shaft rotates, both fastener 510 and BUP 500 rotate at the same speed with respect to each other.
- centerpost 520 may also have internal threading such that centerpost 520, in some embodiments, couples directly to a driveshaft instead of directly to BUP 500.
- BUP assembly 550 is structured similarly to BUP assembly 500, but also includes receiving features 558 shaped to receive corresponding protrusions 578 of a centerpost 570, such that centerpost 570 extends through BUP 550.
- Fastener 560 is received within cavity 554.
- FIG. 6 illustrates a schematic of an abrading system in accordance with embodiments herein.
- a grinding tool 670 has a motor 672, driven pneumatically or electrically, that drives movement of a drive shaft 674. Grinding tool 670 may have other features 678 as well.
- a backup pad 620 includes a drive shaft receiver 624, such as internal threading, that couples to backup pad 620 to grinding tool 670.
- Backup pad 620 also includes an abrasive article connector 628 that receives an abrasive article 610 on an attachment side of the backup pad 620, the attachment side being opposite a tool side that connects to grinding tool 670.
- Backup pad 620 also includes a fastener receiver 626 which couples to a BUP mating feature 642 of a fastener 640.
- Fastener 640 may assist in maintaining a coupling between backup pad 620 and drive shaft 674 when rotating at high speeds.
- BUP 620 may include a recess that is shaped to receive fastener 640.
- fastener 640 may be a hex nut, and fastener receiver 626 may be shaped to receive the hexagon shape of a hex nut.
- BUP 620 may also have a centerpost receiver 622 that can receive a BUP connecting feature 652 of a centerpost 650.
- BUP connecting feature 652 may extend partially into or through BUP 620.
- BUP connecting feature 652 may couple to centerpost receiver 622 using, for example, snaps, latches, a protrusion fitting to a matching cavity, or any other suitable mechanical fastening.
- the mechanical fastening is reversable, either by an applied force, rotation of centerpost 650, or use of a tool.
- the mechanical fastening is not easily reversible, or can only be reversed by breaking centerpost 650 or a portion of centerpost 650.
- BUP 620 may also have other features 632.
- Fastener 640 may have a drive shaft mating feature 644, which couples fastener 640 directly to drive shaft 674.
- Drive shaft mating feature 644 may include internal threading or other internal features that maintain alignment of fastener 640 with respect to drive shaft 674 when drive shaft 674 rotates.
- fastener 640 does not couple directly to drive shaft 674, and only directly couples to BUP 620.
- Fastener 640 may also have a centerpost mating feature 646, in some embodiments, that allows fastener 640 to directly couple to a fastener connecting feature 654 of a centerpost 650.
- fastener 640 does not directly couple to centerpost 650.
- Fastener 648 may have other features 648.
- Abrading system 600 may also have a centerpost 650 that can be optionally used when higher rotational speeds are needed for an abrasive operation.
- Centerpost 650 may connect to BUP 620, using a BUP connecting feature 652, in some embodiments.
- Centerpost 650 may also, or alternatively, couple to fastener 640, in some embodiments, using fastener connecting feature 654.
- Centerpost 650 may also, or alternatively, couple to drive shaft 674, in some embodiments, using a drive shaft connecting feature 656.
- Centerpost 650 may also have other features 658, such as a removal feature, which may include a tool-receiving slot, in some embodiments.
- FIGS. 7A and 7B illustrate methods of using embodiments described herein.
- Methods 700 and 750 illustrate methods in which a configuration of a grinding system is changed from a first configuration to a second configuration.
- methods 700 and 750 are reversible such that, for example, a device can go from operating with a centerpost, to operating without a centerpost, and then back to operating with a centerpost.
- a centerpost may be a single-use article such that removal may damage it such that reuse is not possible, such as breaking or twisting a connecting feature.
- Method 700 is a method of converting an abrading system from a first configuration 710, with a centerpost 712, to a second configuration, without a centerpost.
- a centerpost is coupled to a BUP system, for example either directly to a backup pad, to a fastener, to a drive spindle, or another component such that, when the drive shaft is rotating, centerpost also rotates.
- An abrasive article may need to be removed, as indicated in block 720, in order to remove a centerpost.
- an abrasive article is directly coupled to a backup pad, e.g. through a hook and loop, 3M Dual LockTM system, or other suitable system, such that a centerpost can be removed without disturbing the abrasive article.
- the centerpost is removed, as indicated in block 730.
- the centerpost may be reusably removed, as indicated in block 724.
- the centerpost may be held in place mechanically, using a snap or latch.
- Removing the centerpost may include rotating the centerpost or applying force or torque to mechanically undo the snap or latch.
- Removing the centerpost may be toolless, as indicated in block 732 such that a user can remove the centerpost with their fingers or hand, in some embodiments.
- the centerpost may be removeable with application of torque or force by a tool.
- the centerpost may be coupled to a BUP system without adhesive, as indicated in block 734.
- the centerpost may be a single-use centerpost, as indicated in block 722 held in place with single-use adhesive, as indicated in block 734. Other methods of removal are contemplated, as indicated in block 736.
- the centerpost is a singleuse centerpost, as indicated in block 722, with a mechanical component that cannot be removed without breaking the centerpost. Removing a centerpost, in block 730, requires breaking the centerpost.
- a BUP system such as that envisioned in FIG. 6, may include a BUP, a fastener, and a number of single-use centerposts.
- the abrasive article may be replaced, as indicated in block 740.
- the old abrasive article may be removed, in block 720, and anew abrasive article may be applied, as indicated in block 740.
- Method 750 is a method of converting a BUP system from a first configuration 760, without a centerpost 762, to a second configuration 790, with a centerpost in place.
- the centerpost may be permanently coupled to the BUP system, or may be removeably coupled to the BUP system.
- it may be necessary to remove an abrasive article, as indicated in block 770.
- Some abrasive articles have a centerhole, as illustrated in FIG. 2C, configured to fit around a centerpost.
- Other abrasive articles, as indicated in FIG. 2B, do not have a centerhole.
- a centerpost may extend through receiving slots in a BUP, and may also extend through corresponding apertures in an abrasive article (not shown). In such embodiments, it may only be necessary to remove an abrasive article, as indicated in block 770, when replacing a used abrasive article with a new abrasive article.
- a centerpost is applied, in block 780.
- the centerpost may be applied using a snap mechanism, as indicated in block 792, a latch mechanism, as indicated in block 794, or another suitable mechanism, as indicated in block 796, such as a sliding lock, for example.
- a snap mechanism as indicated in block 792
- a latch mechanism as indicated in block 794
- another suitable mechanism as indicated in block 796, such as a sliding lock, for example.
- Other suitable mechanical fastening methods are envisioned.
- the centerpost is a single-use centerpost that is applied permanently to a BUP.
- an adhesive is used to make the centerpost application permanent.
- the centerpost snaps or latches into place such that removal breaks a component of the centerpost, such as a protruding portion.
- the centerpost is applied in a nonpermanent, releaseable manner, such that, for example, method 700 may be used next.
- the centerpost may be applied and / or removed toollessly, as indicated in block 782, for example with a latch 794 that slides or rotates into place.
- the centerpost may be applied without adhesive, as indicated in block 784, so that it can be removed and reused.
- Other application methods are also envisioned, as indicated in block 786.
- FIGS. 8A-8F illustrate centerpost attachment systems in accordance with embodiments herein.
- FIGS. 8A and 8B illustrate a BUP system 810 where a centerpost 806 is received by a cavity 802, and an abrasive article is received by an attachment surface 804.
- FIG. 8C illustrates another centerpost attachment system 830, that includes a BUP 822 with a keyhole 824 that receives a correspondingly shaped key 828 in a centerpost 826. While an X-lock design is illustrated in FIG. 8C, it is expressly contemplated that other designs, such as a “T” or “+” are expressly contemplated. While a centerpost has been described herein as being inserted through a centerhole, or through apertures, of an abrasive article, it is expressly contemplated that an abrasive article may attach to an attachment surface of a backup pad 842 over a centerpost 844, which may couple to a backup pad and form a flat, substantially planar surface, as illustrated in FIG. 8D.
- FIG. 8E illustrates a schematic of a wedge locking system.
- System 870 removeably couples a centerpost 876 to a backup pad 872.
- Illustrated in FIG. 8E is an embodiment where a wedge 854 is a separate component from both backup pad 858 and centerpost 852. However, this is for simplicity in explanation only. It is expressly contemplated that either or both of backup pad 858 or centerpost 852 have a wedge that provides a biasing force to keep the components coupled during use.
- centerpost 852 is received into a cavity 862 of backup pad 858, as illustrated by arrow 864.
- Cavity 862 is slightly larger than a diameter of centerpost 852, allowing for centerpost to be easily inserted and removed.
- a wedge component 854 is separately inserted and fastened to backup pad 858 using fastener 856.
- Fastener 856 is illustrated as a screw, however other suitable fasteners are contemplated.
- a combined diameter of centerpost 852 and wedge 854 increases, until it is greater than a diameter of cavity 862, which then causes a biasing force in the direction of arrow 868.
- Any of centerpost 852, wedge 854 or backup pad 858 may be made of a material with some compressibility to accommodate the full insertion of wedge component 854.
- a spring latch system is presented for a backup pad system 870.
- Backup pad 872 has a coil 874 or O-ring within a groove that is configured to receive a post 876 of a centerpost 876.
- the spring latch is illustrated as part of the backup pad 872 in FIG. 8F, it is expressly contemplated that the components could be switched, with a receiving post extending from a backup pad that receives a spring latch and coil within centerpost 876.
- a spring latch 872 with a coil 874 or O-ring within a groove is configured to fit over a post 876 to form a connection system 870.
- the spring latch 872 may be part of a centerpost that fits over a post 876 that is part of a BUP.
- the spring latch 872 may be part of a BUP that receives a post 876 of a centerpost.
- FIG. 9 illustrates a center post connection mechanism in accordance with embodiments herein.
- FIG. 9 illustrates an embodiment of a center post 900.
- Center post 900 includes two movable features 910 that, when a force 920 is applied, can move in direction 922.
- Center post 900 also includes one or more side walls 930.
- Each sidewall 930 in some embodiments, has a smaller diameter, or the same diameter, as the inner diameter of an abrasive disc.
- Features 910 are angled with respect to a surface of center post 900, such that an effective diameter of features 910 is larger than an inner diameter of an abrasive disc.
- FIGS 10 A- 10C illustrate interchangeable backup pad attachment systems in accordance with embodiments herein.
- FIG. 10A illustrates a center post 1002 coupled to a backup pad 1010.
- FIG. 10B illustrates an image of center post 1002 coupled to backup pad 1010.
- Backup pad 1010 has a DUAL-LOCKTM surface that receives an abrasive article.
- FIG. 10 C illustrates an abrasive article 1030 coupled to a backup pad (not shown).
- Center post 1004 is substantially coplanar with a surface of abrasive article 1030.
- center post 1004 may be depressed with respect to abrasive article 1030, or may extend further from a backup pad than abrasive article 1030. Because an effective diameter of center post 1040 is larger than the inner diameter of abrasive article 1030, center post 1004 maintains a position of abrasive article 1030 on a backup pad.
- FIGS. 9-10 illustrate a center post configuration, where a center post has a wider effective diameter than an inner diameter of an abrasive article due to the movable features and one or more side walls.
- a center post has a wider effective diameter than an inner diameter of an abrasive article due to the movable features and one or more side walls.
- other center post designs may also be suitable.
- FIGS. 11A-11D illustrate different embodiments of center post connection mechanisms.
- FIG. 11 A illustrates a center post configuration 1110, which is similar to that shown in FIG. 9-10. Movable features include an angled exterior wall with respect to a backup pad surface.
- FIG. 11B illustrates a center post 1120 with movable features with exterior walls perpendicular to a backup pad surface. It is also expressly contemplated that more or fewer movable features may be suitable.
- FIG. 11C illustrates a center post 1030 with three movable features and three side walls. Movable features of center post 1030 may be slanted with respect to a backup pad surface, or perpendicular with respect to a backup pad surface.
- FIG. 1 ID illustrates a center post 1040 that includes no movable features, but achieves a similar effect using two slanted side walls.
- the centerpost may couple directly to a drive shaft of a grinding tool.
- the centerpost may contain threading that couples to internal threading on the BUP such that the centerpost can be screwed onto, and off of, the centerpost.
- the BUP may include a molded slot that receives a protrusion of the centerpost.
- the molded slot may be part of the centerpost that receives a protrusion from the BUP.
- centerpost is described herein as a separate component from the fastener, it is expressly contemplated that a single machined component may replace the two components, such that a single machined or casted component serves as the centerpost and is coupled into the BUP.
- centerpost and / or the BUP may include a magnetic component either in addition to or instead of a mechanical fastening.
- a protrusion on either the BUP or the centerpost may be magnetically attracted to a cavity in the centerpsot or the BUP.
- an interface may exist, in some embodiments, between the centerpost and the BUP, such as a series of flats, polygons or cylinders with an interference fit.
- a threaded attachment is shown and described as the main coupling mechanism between a drive shaft and components of a BUP assembly
- attachment between the BUP, fastener and / or centerpost may be carried out by a quickconnect mechanism.
- the centerpost may also be directly connected to a shaft of a robotic tool.
- a quick-connect mechanism may comprise, for example, a bayonet or other twist-lock cooperation.
- Linear or other non-rotating quick-connects may also be used, such as spring- loaded ball-and-socket connections or hex-shank quick connections.
- a backup pad assembly includes a backup pad with a cavity and a centerpost that is coupleable to the backup pad.
- the backup pad is configured to couple to a tool in a first configuration, without the centerpost, and in a second configuration, with the centerpost.
- the assembly may be implemented such that it includes a fastener that fits within the cavity.
- the assembly may be implemented such that the backup pad includes an abrasive article attachment surface.
- the assembly may be implemented such that the attachment surface includes a dual lock system or a hook and loop system.
- the assembly may be implemented such that the backup pad includes a centerpost receiving feature that receives a corresponding backup pad mating feature of the centerpost.
- the assembly may be implemented such that the backup pad includes a driveshaft attachment mechanism.
- the assembly may be implemented such that the centerpost includes a driveshaft attachment mechanism.
- the assembly may be implemented such that the fastener includes a driveshaft attachment mechanism.
- the assembly may be implemented such that the centerpost receiving feature is a cavity, and the backup pad mating feature includes a protrusion.
- the assembly may be implemented such that the centerpost receiving feature is a protrusion and the backup pad mating feature includes a cavity.
- the assembly may be implemented such that the centerpost is removeably coupleable to the backup pad.
- the assembly may be implemented such that the coupling includes a snap.
- the assembly may be implemented such that the coupling includes a latch.
- the assembly may be implemented such that the coupling includes a key and keyhole.
- the assembly may be implemented such that the backup pad includes a cavity with a wedge.
- a wedge diameter, in combination with a centerpost diameter, is greater than a diameter of the cavity.
- the assembly may be implemented such that the centerpost includes a wedge, the backup pad includes a cavity.
- a wedge diameter, in combination with a centerpost diameter, is greater than a diameter of the cavity.
- the assembly may be implemented such that it includes a wedge component configured to be fastened in place such that, on a first side, the wedge contacts the centerpost and, on a second side, the wedge contacts the backup pad.
- the assembly may be implemented such that the coupling includes a spring latch.
- the assembly may be implemented such that the coupling is a toolless coupling.
- the assembly may be implemented such that the coupling is adhesive free.
- the assembly may be implemented such that the coupling is a mechanical coupling.
- the assembly may be implemented such that the centerpost includes a tool receiving slot such that the centerpost is uncoupleable from the backup pad.
- a method of converting a backup pad assembly from a centerpost configuration to a centerpost-free configuration includes uncoupling a centerpost from a backup pad.
- the coupling is a mechanical coupling.
- the method also includes attaching an abrasive article to the backup pad.
- the backup pad is coupled to a drive shaft of a powered tool.
- the backup pad is operable, coupled to the powered tool, in both the centerpost configuration and the centerpost-free configuration.
- the method may be implemented such that the centerpost is a single-use centerpost, such that uncoupling the centerpost from the backup pad renders it unusable.
- the method may be implemented such that uncoupling the centerpost breaks or deforms a portion of the centerpost.
- the method may be implemented such that the backup pad includes a cavity, and further including a fastener that fits within the cavity.
- the method may be implemented such that the backup pad includes an abrasive article attachment surface.
- the method may be implemented such that the centerpost, when coupled to the backup pad, is substantially planar with the attachment surface.
- the method may be implemented such that it includes removing a used abrasive article.
- the used abrasive article covers the centerpost.
- the method may be implemented such that the backup pad includes a centerpost receiving feature that receives a corresponding backup pad mating feature of the centerpost. Uncoupling the centerpost includes uncoupling the backup pad mating feature from the centerpost receiving feature.
- the method may be implemented such that the backup pad includes a driveshaft attachment mechanism.
- the method may be implemented such that the centerpost includes a driveshaft attachment mechanism.
- the method may be implemented such that the fastener includes a driveshaft attachment mechanism.
- the method may be implemented such that the centerpost receiving feature is a cavity, and the backup pad mating feature includes a protrusion.
- the method may be implemented such that the centerpost receiving feature is a protrusion and the backup pad mating feature includes a cavity.
- the method may be implemented such that the coupling includes a snap.
- the method may be implemented such that the coupling includes a latch.
- the method may be implemented such that the coupling includes a key and keyhole.
- the method may be implemented such that the backup pad includes a cavity with a wedge.
- a wedge diameter, in combination with a centerpost diameter, is greater than a diameter of the cavity.
- the method may be implemented such that the centerpost includes a wedge, the backup pad includes a cavity.
- a wedge diameter, in combination with a centerpost diameter, is greater than a diameter of the cavity.
- the method may further include a wedge component configured to be fastened in place such that, on a first side, the wedge contacts the centerpost and, on a second side, the wedge contacts the backup pad.
- the method may be implemented such that the coupling includes a spring latch.
- the method may be implemented such that the coupling is a toolless coupling.
- the method may be implemented such that the coupling is adhesive free.
- the method may be implemented such that the coupling is a mechanical coupling.
- the method may be implemented such that the centerpost includes a tool receiving slot such that the centerpost is uncoupleable from the backup pad.
- a method of converting a backup pad assembly from a centerpost-free configuration to a centerpost configuration includes coupling a centerpost to a backup pad.
- the centerpost has a backup pad connecting feature that couples to a centerpost receiving feature of the backup pad.
- the method also includes applying an abrasive article to an attachment surface of the backup pad.
- the backup pad is coupled to a drive shaft of a powered tool.
- the backup pad is operable, coupled to the powered tool, in both the centerpost configuration and the centerpost-free configuration.
- the method may be implemented such that the centerpost is a single-use centerpost.
- the method may be implemented such that uncoupling the centerpost breaks or deforms a portion of the centerpost.
- the method may be implemented such that the backup pad includes a cavity, and further including a fastener that fits within the cavity.
- the method may be implemented such that the backup pad includes an abrasive article attachment surface.
- the method may be implemented such that the centerpost, when coupled to the backup pad, is substantially planar with the attachment surface.
- the method may further include removing a used abrasive article.
- the used abrasive article covers the centerpost.
- the method may be implemented such that the backup pad includes a centerpost receiving feature that receives a corresponding backup pad mating feature of the centerpost.
- Ucoupling the centerpost includes uncoupling the backup pad mating feature from the centerpost receiving feature.
- the method may be implemented such that the backup pad includes a driveshaft attachment mechanism.
- the method may be implemented such that the centerpost includes a driveshaft attachment mechanism.
- the method may be implemented such that the fastener includes a driveshaft attachment mechanism.
- the method may be implemented such that the centerpost receiving feature is a cavity, and the backup pad mating feature includes a protrusion.
- the method may be implemented such that the centerpost receiving feature is a protrusion and the backup pad mating feature includes a cavity.
- the method may be implemented such that the coupling includes a snap.
- the method may be implemented such that the coupling includes a latch.
- the method may be implemented such that the coupling includes a key and keyhole.
- the method may be implemented such that the backup pad includes a cavity with a wedge.
- a wedge diameter, in combination with a centerpost diameter, is greater than a diameter of the cavity.
- the method may be implemented such that the centerpost includes a wedge, the backup pad includes a cavity.
- a wedge diameter, in combination with a centerpost diameter, is greater than a diameter of the cavity.
- the method may also include a wedge component configured to be fastened in place such that, on a first side, the wedge contacts the centerpost and, on a second side, the wedge contacts the backup pad.
- the method may be implemented such that the coupling includes a spring latch.
- the method may be implemented such that the coupling is a toolless coupling.
- the method may be implemented such that the coupling is adhesive free.
- the method may be implemented such that the coupling is a mechanical coupling.
- the method may be implemented such that the centerpost includes a tool receiving slot such that the centerpost is uncoupleable from the backup pad.
- a backup pad kit includes a backup pad including a drive shaft receiving feature configured to mount the backup pad on a drive shaft of a tool, an abrasive article connector configured to couple an abrasive article to the backup pad.
- the kit also includes a centerpost including a backup pad connecting feature configured to couple the centerpost to the backup pad.
- the backup pad is configured to operate in a centerpost configuration, such that the backup pad is coupled to both the drive shaft and the centerpost, as well as in a centerpost-free configuration. The backup pad is free of a coupling to the centerpost.
- the kit may be implemented such that it includes a fastener that fits within a cavity of the backup pad.
- the kit may be implemented such that the abrasive article connector includes an abrasive article attachment surface.
- the kit may be implemented such that the attachment surface includes a dual lock system or a hook and loop system.
- the kit may be implemented such that the centerpost includes a driveshaft attachment mechanism.
- the kit may be implemented such that the fastener includes a driveshaft attachment mechanism.
- the kit may be implemented such that the backup pad includes a cavity, and the backup pad connecting feature includes a protrusion.
- the kit may be implemented such that the backup pad includes a protrusion and the backup pad connecting feature includes a cavity.
- the kit may be implemented such that the centerpost is removeably coupleable to the backup pad.
- the kit may be implemented such that the coupling includes a snap.
- the kit may be implemented such that the coupling includes a latch.
- the kit may be implemented such that the coupling includes a key and keyhole.
- the kit may be implemented such that the coupling includes a wedge.
- the kit may be implemented such that the coupling includes a spring latch.
- the kit may be implemented such that the coupling is a toolless coupling.
- the kit may be implemented such that the coupling is adhesive free.
- the kit may be implemented such that the coupling is a mechanical coupling.
- the kit may be implemented such that the centerpost includes a tool receiving slot such that the centerpost is uncoupleable from the backup pad.
- the kit may be implemented such that the centerpost is a single-use centerpost.
- the kit may be implemented such that uncoupling the centerpost breaks or deforms a portion of the centerpost.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202280059131.XA CN117916057A (en) | 2021-08-30 | 2022-08-04 | Support pad structure and use thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US202163260705P | 2021-08-30 | 2021-08-30 | |
US63/260,705 | 2021-08-30 |
Publications (1)
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WO2023033981A1 true WO2023033981A1 (en) | 2023-03-09 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2022/039364 WO2023033981A1 (en) | 2021-08-30 | 2022-08-04 | Backup pad construction and use thereof |
Country Status (2)
Country | Link |
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CN (1) | CN117916057A (en) |
WO (1) | WO2023033981A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003011527A1 (en) * | 2001-07-26 | 2003-02-13 | Robert Bosch Gmbh | System with a tool holding fixture |
US20030126729A1 (en) * | 2002-01-07 | 2003-07-10 | Pierce Paul M. | Quick disconnect burnisher pad driver |
WO2004062846A2 (en) * | 2003-01-06 | 2004-07-29 | Mackay Joseph H | Arbors and fasteners to afford two forms of easy/quick change mounting for abrasive discs |
WO2021124036A1 (en) * | 2019-12-17 | 2021-06-24 | 3M Innovative Properties Company | Repositionable abrasive disc mounting assembly and method of using the same |
-
2022
- 2022-08-04 CN CN202280059131.XA patent/CN117916057A/en active Pending
- 2022-08-04 WO PCT/US2022/039364 patent/WO2023033981A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003011527A1 (en) * | 2001-07-26 | 2003-02-13 | Robert Bosch Gmbh | System with a tool holding fixture |
US20030126729A1 (en) * | 2002-01-07 | 2003-07-10 | Pierce Paul M. | Quick disconnect burnisher pad driver |
WO2004062846A2 (en) * | 2003-01-06 | 2004-07-29 | Mackay Joseph H | Arbors and fasteners to afford two forms of easy/quick change mounting for abrasive discs |
WO2021124036A1 (en) * | 2019-12-17 | 2021-06-24 | 3M Innovative Properties Company | Repositionable abrasive disc mounting assembly and method of using the same |
Also Published As
Publication number | Publication date |
---|---|
CN117916057A (en) | 2024-04-19 |
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