A direct drive electric lawn mower includes a driving device using an outer rotor electric motor formed of a stator, a rotor, a holder base, a bottom cap and a shaft, a cutting device connected to the shaft of the driving device outside the bottom cap and rotatable with the shaft and the bottom cap
A direct drive electric lawn mower includes a driving device using an outer rotor electric motor formed of a stator, a rotor, a holder base, a bottom cap and a shaft, a cutting device connected to the shaft of the driving device outside the bottom cap and rotatable with the shaft and the bottom cap to cut a lawn at an even height, and an operating device including a tubular handle connected to the driving device, an electrical connector located on one end of the tubular handle remote from the driving device, a grip affixed to the handle and a switch mounted at the tubular handle and electrically connected with the electrical connector and operable to switch on/off the outer rotor electric motor of the driving device.
대표청구항▼
1. A direct drive electric lawn mower, comprising: a driving device comprising an electric motor comprising:a holder;a stator held by said holder;a rotor arranged around said stator;a bottom cover connected to a bottom side of said rotor so that said bottom cover is rotatable by said rotor; anda sha
1. A direct drive electric lawn mower, comprising: a driving device comprising an electric motor comprising:a holder;a stator held by said holder;a rotor arranged around said stator;a bottom cover connected to a bottom side of said rotor so that said bottom cover is rotatable by said rotor; anda shaft comprising a first portion extending in said holder and a second portion extending beyond said bottom cover;a cutting device arranged around the second portion of said shaft;a fastening component engaged with the second portion of said shaft to press said cutting device against said bottom cover so that said cutting device is directly rotatable by said bottom cover; andan operating device comprising a tubular handle connected to said driving device, an electrical connector located on said tubular handle, a grip affixed to said tubular handle, and an on/off switch mounted on said tubular handle and electrically connected to said electrical connector and said electric motor. 2. The direct drive electric lawn mower as claimed in claim 1, wherein said stator comprises an axial mounting hole and a locating groove in a wall of said axial mounting hole; wherein said holder comprises a center tube inserted into said axial mounting hole and a locating groove in the periphery of said center tube;wherein said driving device further comprises a key fitted in said locating grooves to prevent said stator from rotating relative to said holder. 3. The direct drive electric lawn mower as claimed in claim 1, wherein said rotor comprises an annular shell arranged around said stator and a plurality of magnets equiangularly inserted in said annular shell and kept in proximity to the periphery of said stator; wherein said bottom cover comprises a flat body attached to a bottom side of said stator and a plurality of locating rods extending from said flat body into said annular shell, wherein said locating rods are alternatively arranged with said magnets. 4. The direct drive electric lawn mower as claimed in claim 1, wherein said holder comprises a center tube sleeved onto said shaft and inserted through said stator and two bearings inserted in said center tube to support said shaft in said center tube. 5. The direct drive electric lawn mower as claimed in claim 4, wherein said electric motor further comprises a connector fastened to a top end of said shaft and supported on one of said bearings at said holder. 6. The direct drive electric lawn mower as claimed in claim 1, wherein said bottom cover comprises a cross-notched center hole for the passing of the second portion of said shaft; wherein said electric motor further comprises a limiter pin transversely fastened to the second portion of said shaft and inserted in said cross-notched center hole to prohibit rotation of said shaft relative to said bottom cover. 7. The direct drive electric lawn mower as claimed in claim 1, further comprising a connection member comprising: a shield comprising a plurality of mounting apertures;fastening components inserted in said holder through said mounting apertures so that said shield is secured to said holder; anda shank formed on said shield and arranged around and connected to said tubular handle of said operating device. 8. The direct drive electric lawn mower as claimed in claim 1, wherein said cutting device comprises a rotary cutter comprising a wheel pressed against and directly rotatable by said bottom cover and a plurality of ropes connected to said wheel. 9. The direct drive electric lawn mower as claimed in claim 1, wherein said cutting device comprises a blade pressed against and directly rotatable by said bottom cover. 10. A direct-drive electric lawn mower comprising: a driving device comprising an electric motor comprising: a holder;a stator held by said holder;a rotor comprising an annular shell arranged around said stator and magnets evenly mounted on an internal side of said annular shell; anda bottom cover connected to a lower side of said annular shell so that said bottom cover is rotatable by said rotor;a shaft comprising a first portion extending in said holder and a second portion extending beyond said bottom cover; anda cutting device arranged around the second portion of said shaft;a fastening component engaged with the second portion of said shaft to press the cutting device against said bottom cover so that said cutting device is directly rotatable by said bottom cover; andan operating device comprising a tubular handle connected to said driving device, an electrical connector located on said tubular handle, a grip connected to said tubular handle, and an on/off switch connected to said tubular handle and electrically connected to said electrical connector and said electric motor. 11. The direct drive electric lawn mower as claimed in claim 10, wherein said stator comprises an axial mounting hole and a locating groove in a wall of said axial mounting hole, wherein said holder comprises a center tube inserted into said axial mounting hole and a locating groove in the periphery of said center tube, wherein said driving device further comprises a key fitted in said locating grooves to prevent said stator from rotating relative to said holder. 12. The direct-drive electric lawn mower according to claim 10, wherein said bottom cover comprises a flat body located below said stator and locating rods formed on said flat body and alternatively arranged with said magnets. 13. The direct drive electric lawn mower as claimed in claim 10, wherein said holder comprises a center tube sleeved onto said shaft and inserted through said stator and two bearings inserted in said center tube to support said shaft in said center tube. 14. The direct drive electric lawn mower as claimed in claim 10, wherein said bottom cover comprises a cross-notched center hole, wherein the second portion of said shaft extends through the cross-notched center hole, wherein said electric motor further comprises a limiter pin transversely fastened to the second portion of said shaft and inserted in said cross-notched center hole to prohibit rotation of said shaft relative to said bottom cover. 15. The direct-drive electric lawn mower according to claim 10, further comprising a connection member comprising: a shield connected to said holder of said electric motor; anda shank formed on said shield and fixedly connected to said tubular handle of said operating device. 16. The direct-drive electric lawn mower according to claim 10, wherein said cutting device comprises a wheel pressed against and directly rotatable by said bottom cover and ropes connected to said wheel. 17. The direct-drive electric lawn mower according to claim 10, wherein said cutting device comprises a blade pressed against and directly rotatable by said bottom cover.
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Bair Lester E. (Brownsville TX), Apparatus for trimming vegetation.
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