Electric pole lopper

An electric lopper comprising:

• a handle;
• a connecting pole;
• and
• a pruning component,
• wherein the handle, connecting pole, and pruning component are connected in sequence,
• wherein the pruning component comprises a casing, a control mechanism and, connected in sequence, a motive power mechanism, a drive mechanism and a cutter set,
• wherein the motive power mechanism and the drive mechanism are disposed in the casing,
• wherein the cutter set is disposed at that end of the casing which is remote from the motive power mechanism,
• wherein the handle comprises a switch connected to the motive power mechanism,
• wherein the control mechanism is connected to the drive mechanism,
• wherein the drive mechanism is a worm gear/worm drive mechanism or a ball screw drive mechanism,
• wherein the cutter set comprises an upper cutter and a lower cutter,
• wherein the upper cutter comprises a toothed tail part and an upper cutting head formed from separate parts and coupled together,
• wherein the upper cutter is coupled to the lower cutter via a threaded connecting member,
• wherein the threaded connecting member is a stepped connecting member, comprising a cylindrical threaded end, a cylindrical middle segment, a square prism and a cuboid end which are connected in sequence, wherein the cylindrical threaded end is arranged coaxially with the cylindrical middle segment, and the cylindrical threaded end has a smaller diameter than the cylindrical middle segment;
• wherein the circle centre of a cross section of the cylindrical middle segment, the centre point of a square cross section of the square prism and the centre point of the cuboid end are all coincident;
• wherein the area of the cross section of the cylindrical middle segment is less than the area of the square cross section of the square prism, and the area of the square cross section of the square prism is less than the area of that side of the cuboid end which is connected to the square prism,
• wherein the toothed tail part and the upper cutting head are provided with round through-holes fitting the cylindrical middle segment, the lower cutter and the casing are provided with square through-holes fitting the square prism, and the casing is provided with a rectangular recess fitting the cuboid end, the square through-hole in the casing being disposed in the rectangular recess, and
• wherein, starting at the cuboid end, the stepped connecting member passes through the casing, the lower cutter, the upper cutting head and the toothed tail part in sequence;
• the cylindrical threaded end passes through the toothed tail part and is connected to a nut.