BATTERY POWERED HANDHELD OUTDOOR POWER EQUIPMENT
A handheld edger includes an electric powerhead coupled to a mounting location, a member, and a cutting assembly. The electric powerhead includes a motor having an output shaft rotating at a first speed about an output shaft axis and a battery configured to power the motor. The member extends from the mounting location and includes an upper portion and a lower portion, the lower portion configured to be removable and replaceable to exchange one or more attachments. The cutting assembly coupled to the member includes a drive shaft, a blade coupled to and driven by the drive shaft, and a worm drive coupled to the output shaft of the motor and the drive shaft, the worm drive configured to cause the drive shaft to rotate the blade at a second speed. A gear ratio of the worm drive is larger than 40:1.
1 . A handheld edger comprising:
an electric powerhead coupled to a mounting location, the electric powerhead comprising:
a motor having an output shaft rotating at a first speed about an output shaft axis;
a battery configured to power the motor;
a member extending from the mounting location, the member including an upper portion and a lower portion, the lower portion configured to be removable and replaceable to exchange one or more attachments;
a cutting assembly coupled to the member comprising:
a drive shaft;
a blade coupled to and driven by the drive shaft; and
a worm drive coupled to the output shaft of the motor and the drive shaft, the worm drive configured to cause the drive shaft to rotate the blade at a second speed;
wherein a gear ratio of the worm drive is larger than 40:1.
2 . The handheld edger of claim 1 , wherein the first speed comprises a range of 7000 revolutions per minute (RPM) to 7600 RPM and the second speed comprises a range of 150 RPM to 175 RPM.
3 . The handheld edger of claim 2 , wherein the motor is an 800 Watt electric motor.
4 . The handheld edger of claim 1 , wherein the motor is an 800 Watt electric motor.
5 . The handheld edger of claim 1 , wherein the blade includes one or more tines having a flat profile.
6 . The handheld edger of claim 1 , further comprising a first guide wheel coupled to the drive shaft proximate a first side of the worm drive and configured to freely rotate about a wheel axis.
7 . The handheld edger of claim 6 , further comprising a second guide wheel coupled to a rod extending from a second side of the worm drive and configured to freely rotate about the wheel axis.
8 . The handheld edger of claim 1 , further comprising a fastener inserted into a hole on the drive shaft and configured to maintain the blade on the drive shaft.
9 . The handheld edger of claim 1 , wherein the electric powerhead further comprises a housing and a battery receptacle formed in the housing;
wherein the battery is configured to be inserted into the battery receptacle and removable and replaceable without the use of tools.
10 . The handheld edger of claim 9 , wherein the battery is inserted into the battery receptacle along an axis of insertion perpendicular to the output shaft axis.
11 . The handheld edger of claim 1 , wherein the gear ratio of the worm drive is larger than 43:1 and less than 45:1.
12 . The handheld edger of claim 1 , wherein the member further comprises:
a user interface including one or more user input devices;
a gripping portion positioned proximate the user interface;
a handle positioned on the upper portion; and
a shield coupled to the lower portion of the member and configured to prevent debris from projecting upward.
13 . The handheld edger of claim 12 , wherein the handle is configured to slidable along the member between a first position proximate the gripping portion and a second position further from the gripping portion than the first position.
14 . A cutting assembly for use with a handheld edger comprising:
a drive shaft;
a blade coupled to and driven by the drive shaft; and
a worm drive coupled to an output shaft of a motor and the drive shaft, the worm drive configured to cause the drive shaft to rotate the blade at a cutting speed;
wherein a gear ratio of the worm drive is larger than 40:1.
15 . The cutting assembly of claim 14 , further comprising:
a first guide wheel coupled to the drive shaft proximate a first side of the worm drive and configured to freely rotate about a wheel axis.
16 . The cutting assembly of claim 15 , further comprising
a second guide wheel coupled to a rod extending from a second side of the worm drive and configured to freely rotate about the wheel axis.
17 . The cutting assembly of claim 16 , wherein a length of the rod is customizable to a plurality of lengths.
18 . The cutting assembly of claim 14 , wherein the cutting speed comprises a range of 150 RPM to 175 RPM.
19 . The cutting assembly of claim 14 , wherein the cutting speed is 172 RPM.
20 . The cutting assembly of claim 14 , wherein the blade includes one or more tines having a flat profile.