Grass cutter

A grass cutter comprising:

• two or more coaxially disposed blade plates each having a plurality of cutting blades projecting from an outer peripheral portion thereof;
• a power source;
• and
• a deceleration mechanism that decelerates power of the power source to rotate at least one of the blade plates to catch plants between the cutting blades of the two blade plates and to cut the plants with the cutting blade,
• wherein the deceleration mechanism comprises:
• a sun gear-side member;
• a ring gear-side member;
• and at least one small gear,
• the sun gear-side member comprising:
• a sun gear with a gear formed on an outer peripheral portion thereof;
• and
• a sun gear-side guide provided coaxially with the sun gear,
• the ring gear-side member comprising:
• a ring gear with a gear formed on an inner peripheral side thereof;
• and
• a ring gear-side guide provided coaxially with the ring gear,
• wherein the sun gear-side guide engages with the ring gear-side guide directly or through another member so as to prevent the sun gear and the ring gear from relatively moving in a radial direction, and
• wherein the at least one small gear is present between the sun gear and the ring gear, the at least one small gear engaging with both of the sun gear and the ring gear to receive the power of the power source transmitted thereto,
• wherein both of the sun gear and the ring gear are plate-shaped,
• wherein the small gear receiving the power of the power source transmitted thereto has a thickness more than twice as large as those of the sun gear and the ring gear,
• wherein only a region near axial one end of the small gear engages with the sun gear and the ring gear when the small gear engages with the sun gear and the ring gear, and
• wherein top and bottom sides of the small gear are reversible and the region of the small gear engaging with the sun gear and the ring gear is changeable by reversing the top and bottom sides of the small gear according to the necessity.

A grass cutter, comprising:

• two or more coaxially disposed blade plates each having a plurality of cutting blades projecting from an outer peripheral portion thereof;
• a power source;
• and
• a deceleration mechanism that decelerates power of the power source to rotate at least one of the blade plates to catch plants between the cutting blades of the two blade plates and to cut the plants with the cutting blades,
• wherein the deceleration mechanism comprises:
• a sun gear-side member;
• a ring gear-side member;
• and at least one small gear,
• the sun gear-side member comprising:
• a sun gear with a gear formed on an outer peripheral portion thereof;
• and
• a sun gear-side guide provided coaxially with the sun gear and movable as one piece with the sun gear,
• the ring gear-side member comprising:
• a ring gear with a gear formed on an inner peripheral side thereof;
• and
• a ring gear-side guide provided coaxially with the ring gear and movable as one piece with the ring gear,
• wherein the sun gear-side guide engages with the ring gear-side guide directly or through a first another member so as to prevent the sun gear and the ring gear from relatively moving in a radial direction, and
• wherein the at least one small gear is present between the sun gear and the ring gear, the at least one small gear engaging with both of the sun gear and the ring gear to receive the power of the power source transmitted thereto.