Plate compactor

Information

  • Patent Grant
  • 12065790
  • Patent Number
    12,065,790
  • Date Filed
    Wednesday, July 7, 2021
    3 years ago
  • Date Issued
    Tuesday, August 20, 2024
    4 months ago
Abstract
A compactor includes a plate, an electric motor coupled to the plate, an exciter coupled to the plate and configured to vibrate the plate in response to receiving torque from the electric motor, a means for transferring torque from the electric motor to the exciter, a battery configured to provide power to the electric motor, and a vibration isolator coupling the battery to the plate.
Description
FIELD OF THE INVENTION

The present invention relates to plate compactors.


BACKGROUND OF THE INVENTION

Plate compactors include a plate that is caused to vibrate in order to compact soil or other loose material.


SUMMARY OF THE INVENTION

The present invention provides, in one aspect, a compactor comprising a plate, an electric motor coupled to the plate, an exciter coupled to the plate and configured to vibrate the plate in response to receiving torque from the electric motor, a means for transferring torque from the electric motor to the exciter, a battery configured to provide power to the electric motor, and a vibration isolator coupling the battery to the plate.


The present invention provides, in another aspect, a compactor comprising a plate, an electric motor coupled to the plate, an exciter coupled to the plate without a vibration isolator therebetween, the exciter having an eccentric mass, and an endless drive member rotationally coupling the electric motor and the exciter. The endless driver member is configured to transfer torque from the electric motor to the exciter, causing the eccentric mass to rotate. The compactor also includes a battery configured to provide power to the electric motor.


The present invention provides, in yet another aspect, a compactor comprising a plate, an electric motor coupled to the plate, an exciter coupled to the plate and configured to vibrate the plate in response to receiving torque from the electric motor, a means for transferring torque from the electric motor to the exciter, control electronics configured to control operation of the electric motor, and a vibration isolator coupling the control electronics to the plate.





BRIEF DESCRIPTION OF THE DRAWINGS


FIG. 1 is a schematic plan side view of a plate compactor.



FIG. 2 is a schematic plan side view of a plate compactor according to an embodiment of the invention.



FIG. 2A is a perspective view of a plate compactor according to another embodiment of the invention.



FIG. 3 is a schematic top plan view of the plate compactor of FIG. 2.



FIG. 4 is a schematic top plan view of a plate compactor according to another embodiment of the invention.





Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.


DETAILED DESCRIPTION

As shown in FIG. 1, a typical gas-powered plate compactor 10 includes a plate 14, an exciter 18 with an eccentric mass 22 to vibrate the plate 14, and a gas engine 26 to drive the exciter 18 via an output pulley 30 and a belt 34. The gas engine 26 is vibrationally isolated from the exciter 18, via vibration isolators 38 or dampers, to protect the gas engine 26 from excessive vibration. While minimizing vibration is good, this arrangement is not efficient. To maximize runtime in battery powered systems, efficiency is critical because battery energy density is currently significantly lower than gasoline.



FIGS. 2 and 3 illustrate an embodiment of a plate compactor 42 including a plate 46, an exciter 50 with an eccentric mass 54 to vibrate the plate 46, and an electric motor 58 to drive the exciter 50 via a torque transfer device 62 (e.g., a transmission, an endless drive member such as a roller chain or a belt, and/or a gear train). Although the plate 46 is schematically illustrated as a single body, the plate 46 may comprise a combination of rigidly connected components that facilitate sliding the compactor 42 across a work surface to be compacted. A battery 66 (e.g., a battery pack) powers the electric motor 58. The battery 66 is mounted on a platform 68 that is vibrationally isolated from the electric motor 58 by vibration isolators 70 or dampers between the platform 68 and the plate 46. Thus, the battery 66 is vibrationally isolated from the electric motor 58. Likewise, a handle 72 is coupled to and vibrationally isolated from the platform 68 via another vibration isolator 73. Alternatively, the handle 72 may instead be coupled to the plate 46.


The electric motor 58 and the exciter 50 are directly coupled to the plate 46 so that there is no relative motion (i.e., axial displacement) between them. The torque transfer device 62 includes a gear train 74, for example, that transfers torque from a motor shaft 78 to an exciter shaft 82. Thus, the gear train 74 permits the exciter 50 to be driven faster or slower than the electric motor 58. In the embodiment of FIGS. 2 and 3, control electronics 86 for controlling operation of the electric motor 58 are coupled to the electric motor 58 for cooling purposes, but in other embodiments, the control electronics 86 can be mounted on a portion of the plate compactor 42 that is vibrationally isolated from the exciter 50, such as the platform 68 along with the battery 66. In an embodiment of the compactor 26 in which the platform 68 is configured as a housing 88 defining thereon a battery receptacle 89 to which the battery 66 is connectable (FIG. 2A), the control electronics 86 may be located within the housing 88. In some embodiments, the compactor 26 may include an intermediate frame 64 interconnecting the housing 88 and the plate 46 (e.g., via additional vibrational isolators 73). In operation of the plate compactor 42, the control electronics 86 control operation of the electric motor 58, which drives the exciter 50 via the gear train 74, thus rotating the eccentric mass 54 about the exciter shaft 82, imparting vibration to the plate 46.



FIG. 4 illustrates another embodiment of a plate compactor 90 that is similar to the embodiment of FIGS. 2 and 3, except that an electric motor 94, motor shaft 98, gearbox 102, exciter 110, and exciter shaft 114 are arranged on a rotational axis 118. The gearbox 102, gear train 106, exciter 110, exciter shaft 114, and an eccentric mass 138 are all on one side of the electric motor 94. As in the embodiment of FIGS. 2 and 3, the electric motor 94 and the exciter 110 are directly coupled to a plate 126 so that there is no relative motion (i.e., axial displacement) between them. In the embodiment of FIG. 4, control electronics 130 could be mounted with the electric motor 94 or could be mounted with a battery 134, as shown in FIG. 4. In operation of the plate compactor 90, the control electronics 130 control operation of the electric motor 94, which drives the exciter 110 via the gear train 106, thus rotating the eccentric mass 138 about the exciter shaft 114, imparting vibration of the plate 126.


By utilizing a gear train 74, 106 to transfer torque from the electric motor 58, 94 to the exciter 50, 110, the plate compactors 42, 90 of FIGS. 2-4 achieve a longer runtime than an embodiment in which the electric motor is isolated from the exciter and provides torque to the exciter via a belt.


Although the invention has been described in detail with reference to certain preferred embodiments, variations and modifications exist within the scope and spirit of one or more independent aspects of the invention as described.


Various features of the invention are set forth in the following claims.

Claims
  • 1. A compactor comprising: a plate;an electric motor coupled to the plate;an exciter coupled to the plate and configured to vibrate the plate in response to receiving torque from the electric motor;a means for transferring torque from the electric motor to the exciter;control electronics configured to control operation of the electric motor;a battery configured to provide power to the electric motor; anda vibration isolator coupling the battery and the control electronics to the plate.
  • 2. The compactor of claim 1, wherein the electric motor includes a motor shaft, wherein the exciter includes an exciter shaft and an eccentric mass attached thereto, and wherein the exciter shaft is configured to receive torque from the motor shaft to rotate the eccentric mass to impart vibration to the plate.
  • 3. The compactor of claim 2, wherein the motor shaft rotates about a rotational axis, and wherein the exciter shaft is coaxial with the rotational axis.
  • 4. The compactor of claim 3, wherein the torque transfer means and the exciter are located on one side of the electric motor.
  • 5. The compactor of claim 2, wherein the motor shaft rotates about a rotational axis, and wherein the exciter shaft is parallel with the rotational axis.
  • 6. The compactor of claim 5, wherein the torque transfer means includes at least one of a transmission, a roller chain, a belt, and/or a gear train.
  • 7. The compactor of claim 1, further comprising a platform upon which the battery is supported, wherein the platform is coupled to the plate via the vibration isolator.
  • 8. The compactor of claim 7, wherein the platform is configured as a housing, and wherein the control electronics are located within the housing.
  • 9. A compactor comprising: a plate;an electric motor coupled to the plate;an exciter coupled to the plate without a vibration isolator therebetween, the exciter having an eccentric mass;an endless drive member rotationally coupling the electric motor and the exciter, wherein the endless drive member is configured to transfer torque from the electric motor to the exciter, causing the eccentric mass to rotate; anda battery configured to provide power to the electric motor.
  • 10. The compactor of claim 9, wherein the electric motor includes a motor shaft configured to rotate about a rotational axis, and wherein the exciter includes an exciter shaft, to which the eccentric mass is coupled, that is parallel with the rotational axis.
  • 11. The compactor of claim 9, wherein the endless drive member is configured as one of a roller chain or a belt.
  • 12. The compactor of claim 9, further comprising: a platform upon which the battery is supported; anda vibration isolator coupling the platform to the plate.
  • 13. The compactor of claim 9, wherein the electric motor and the exciter are directly coupled to the plate.
  • 14. The compactor of claim 12, further comprising control electronics configured to control operation of the electric motor, wherein the platform is configured as a housing, and wherein control electronics are located within the housing.
  • 15. A compactor comprising: a plate;an electric motor coupled to the plate;an exciter coupled to the plate and configured to vibrate the plate in response to receiving torque from the electric motor;a means for transferring torque from the electric motor to the exciter;control electronics configured to control operation of the electric motor; anda vibration isolator coupling the control electronics to the plate.
  • 16. The compactor of claim 15, wherein the electric motor includes a motor shaft, wherein the exciter includes an exciter shaft and an eccentric mass attached thereto, and wherein the exciter shaft is configured to receive torque from the motor shaft to rotate the eccentric mass to impart vibration to the plate.
  • 17. The compactor of claim 16, wherein the motor shaft rotates about a rotational axis, and wherein the exciter shaft is coaxial with the rotational axis.
  • 18. The compactor of claim 17, wherein the torque transfer means and the exciter are located on one side of the electric motor.
  • 19. The compactor of claim 16, wherein the motor shaft rotates about a rotational axis, and wherein the exciter shaft is parallel with the rotational axis.
  • 20. The compactor of claim 19, wherein the torque transfer means includes at least one of a transmission, a roller chain, a belt, and/or a gear train.
  • 21. The compactor of claim 15, further comprising a platform configured as a housing in which the control electronics are located, wherein the platform is coupled to the plate via the vibration isolator.
CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to U.S. Provisional Patent Application No. 63/059,250 filed on Jul. 31, 2020 and U.S. Provisional Patent Application No. 63/048,722 filed on Jul. 7, 2020, the entire contents of both of which are incorporated herein by reference.

US Referenced Citations (81)
Number Name Date Kind
3306174 Wardell Feb 1967 A
3530577 Franklin et al. Sep 1970 A
3543655 Uebel Dec 1970 A
3759624 Hundey et al. Sep 1973 A
3802791 Uebel et al. Apr 1974 A
3832080 Stoecker Aug 1974 A
3883260 Heckner May 1975 A
3917426 Wohlwend et al. Nov 1975 A
3972637 Sutherland Aug 1976 A
4113403 Tertinek et al. Sep 1978 A
4145156 Grane Mar 1979 A
4199271 Riedl Apr 1980 A
4356736 Riedl Nov 1982 A
4775263 Persson Oct 1988 A
4838730 Owens Jun 1989 A
5632569 Szmansky May 1997 A
5672027 Wadensten Sep 1997 A
5890834 Waldenberger Apr 1999 A
5957622 Vera-Montiel Sep 1999 A
6179520 Cochran Jan 2001 B1
6213673 Jungwirth et al. Apr 2001 B1
6213681 Sick et al. Apr 2001 B1
6374569 Suckow Apr 2002 B1
6379082 Takemoto Apr 2002 B1
6394697 De Boer May 2002 B1
6435767 Steffen Aug 2002 B1
6558073 Wrazidlo May 2003 B1
6582155 Bromberger et al. Jun 2003 B1
6659685 Persson Dec 2003 B1
6717379 Andersson Apr 2004 B1
6722815 Fervers Apr 2004 B2
6794632 Steffen Sep 2004 B1
6808336 Fervers et al. Oct 2004 B2
6846128 Sick Jan 2005 B2
6923595 Chek Aug 2005 B1
6953304 Quenzi et al. Oct 2005 B2
7052204 Lutz May 2006 B2
7097384 Lindley Aug 2006 B2
7175365 Breeding Feb 2007 B1
7303356 Schennach et al. Dec 2007 B2
7427176 Persson et al. Sep 2008 B2
7465121 Hendricks et al. Dec 2008 B1
7491014 Sick Feb 2009 B2
7686538 Lutz et al. Mar 2010 B2
7753621 Steffen Jul 2010 B2
7988383 Hickmann Aug 2011 B2
8047742 Sick et al. Nov 2011 B2
8123432 Steffen Feb 2012 B1
8182173 Lickel May 2012 B2
8439600 Brening May 2013 B2
8602680 Fischer et al. Dec 2013 B2
8608402 Argento et al. Dec 2013 B2
8721218 Stenzel May 2014 B2
9010452 Williamson et al. Apr 2015 B2
9139966 Mikowychok Sep 2015 B1
9175447 Steffen Nov 2015 B2
9284697 Steffen Mar 2016 B2
9334613 Erdmann et al. May 2016 B2
9695605 Jin Jul 2017 B2
9879389 Lura Jan 2018 B1
9925563 Bartl et al. Mar 2018 B2
10184217 Mikowychok Jan 2019 B2
10265730 Johnsson et al. Apr 2019 B2
10344439 Steffen Jul 2019 B2
20060067796 Riedl Mar 2006 A1
20060127190 Kremer Jun 2006 A1
20060193693 Congdon Aug 2006 A1
20060272130 Togami et al. Dec 2006 A1
20080298893 Stenzel et al. Dec 2008 A1
20100139424 Wagner Jun 2010 A1
20100166499 Stenzel et al. Jul 2010 A1
20100278590 Stenzel Nov 2010 A1
20120251241 Sperfslage Oct 2012 A1
20130243526 Williamson et al. Sep 2013 A1
20140262400 Berger Sep 2014 A1
20150159384 Wetherell Jun 2015 A1
20150376845 Bartl Dec 2015 A1
20170022673 Mckee Jan 2017 A1
20170275831 Sorg et al. Sep 2017 A1
20190234028 Laugwitz Aug 2019 A1
20200076337 Abbott et al. Mar 2020 A1
Foreign Referenced Citations (97)
Number Date Country
2267271 Nov 1997 CN
2837369 Nov 2006 CN
201092652 Jul 2008 CN
100430554 Nov 2008 CN
101671993 Mar 2010 CN
101671996 Mar 2010 CN
202164588 Mar 2012 CN
202247634 May 2012 CN
202500128 Oct 2012 CN
202519568 Nov 2012 CN
202519569 Nov 2012 CN
203603137 May 2014 CN
203834321 Sep 2014 CN
203834322 Sep 2014 CN
203834323 Sep 2014 CN
104674635 Jun 2015 CN
204626211 Sep 2015 CN
204703042 Oct 2015 CN
204728309 Oct 2015 CN
204898642 Dec 2015 CN
205636716 Oct 2016 CN
106192977 Dec 2016 CN
205839549 Dec 2016 CN
106868990 Jun 2017 CN
206298804 Jul 2017 CN
206428562 Aug 2017 CN
206428563 Aug 2017 CN
107165030 Sep 2017 CN
206570656 Oct 2017 CN
107354933 Nov 2017 CN
206843911 Jan 2018 CN
207073052 Mar 2018 CN
207244834 Apr 2018 CN
207392011 May 2018 CN
207392183 May 2018 CN
207469046 Jun 2018 CN
207484244 Jun 2018 CN
207512557 Jun 2018 CN
207608902 Jul 2018 CN
1911878 Dec 1970 DE
1634679 Jan 1971 DE
1964318 Jul 1971 DE
2155687 May 1973 DE
2319947 Oct 1974 DE
2336631 Feb 1975 DE
7316290 Jul 1976 DE
3230747 Feb 1984 DE
8223313 Mar 1984 DE
3040123 Apr 1984 DE
3240626 Jan 1985 DE
8513149 Jan 1988 DE
9013243 Feb 1991 DE
4016822 Nov 1991 DE
9213315 Dec 1992 DE
9418184 Jan 1995 DE
29605664 Jul 1996 DE
29804047 Jun 1998 DE
29920177 Jan 2000 DE
19840453 Sep 2000 DE
19912813 Dec 2000 DE
202004015141 Dec 2004 DE
102007006209 Nov 2007 DE
202009000264 Mar 2009 DE
202009004301 Nov 2009 DE
202009004302 Nov 2009 DE
102010019053 Nov 2011 DE
202007019293 Nov 2011 DE
202010017338 Jan 2013 DE
102007003927 Dec 2013 DE
102008017058 Mar 2017 DE
102016009029 Feb 2018 DE
0200949 Nov 1986 EP
0464939 Jan 1992 EP
1267001 Sep 2009 EP
2458089 May 2012 EP
2357283 Jun 2013 EP
1980671 Nov 2015 EP
2940213 Nov 2015 EP
2947205 Nov 2015 EP
3069798 Sep 2016 EP
3085832 Oct 2016 EP
2957486 Jan 2018 EP
2455627 Jun 2009 GB
2006009458 Jan 2006 JP
2013181324 Sep 2013 JP
WO1985002220 May 1985 WO
WO1999041461 Aug 1999 WO
WO2002070824 Sep 2002 WO
WO2008049542 May 2008 WO
WO2009121606 Oct 2009 WO
WO2010086669 Aug 2010 WO
WO2011157344 Dec 2011 WO
WO2012062384 May 2012 WO
WO2013137015 Sep 2013 WO
WO2018019408 Feb 2018 WO
WO2018068091 Apr 2018 WO
2020077829 Apr 2020 WO
Non-Patent Literature Citations (2)
Entry
International Search Report and Written Opinion for Application No. PCT/US2021/040669 dated Oct. 7, 2021 (11 pages).
Partial Supplementary European Search Report for Application No. 21837737.2 dated May 17, 2024 (14 pages).
Related Publications (1)
Number Date Country
20220010504 A1 Jan 2022 US
Provisional Applications (2)
Number Date Country
63059250 Jul 2020 US
63048722 Jul 2020 US