Gardening trimmer

Patent metadata

Field	Value
Publication number	US-11464171-B2
Application number	US-202017123618-A
Country	US
Kind code	B2
Filing date	Dec 16, 2020
Priority date	Dec 25, 2019
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

A gardening trimmer may include: a first blade connected to a first cam member and configured to reciprocate in response to rotation of the first cam member; and a second com connected to a second cam member and configured to reciprocate in opposite phase to the first blade in response to rotation of the second cam member. The first cam member includes a first eccentric cam configured to revolve around a first rotation axis and is connected to the first blade at the first eccentric cam. The second cam member includes a second eccentric cam configured to revolve around a second rotation axis and is connected to the second blade at the second eccentric cam. Each of the first and second blades is configured to reciprocate along a plane including the first and second rotation axis.

First claim

What is claimed is:

1. A gardening trimmer, comprising:
a prime mover;
a first cam member configured to be driven by the prime mover to rotate in one direction about a first rotation axis;
a second cam member configured to be driven by the prime mover to rotate in another direction about a second rotation axis parallel to the first rotation axis at a same cycle as the first cam member;
a first blade connected to the first cam member and configured to reciprocate in response to rotation of the first cam member; and
a second blade connected to the second cam member and configured to reciprocate in an opposite phase to the first blade in response to rotation of the second cam member,
wherein the first cam member comprises a first eccentric cam configured to revolve around the first rotation axis and is connected to the first blade at the first eccentric cam,
the second cam member comprises a second eccentric cam configured to revolve around the second rotation axis and is connected to the second blade at the second eccentric cam, and
each of the first blade and the second blade is configured to reciprocate along a plane including the first rotation axis and the second rotation axis.

2. The gardening trimmer according to claim 1 , wherein
the first rotation axis and the second rotation axis are spaced apart from each other in a first direction, and
each of the first blade and the second blade is configured to reciprocate along the first direction.

3. The gardening trimmer according to claim 2 , Wherein the first eccentric cam and the second eccentric cam are each configured to revolve on a same plane perpendicular to the first rotation axis and the second rotation axis.

4. The gardening trimmer according to claim 2 , wherein one of the first cam member and the second cam member is connected to the prime mover via another of the first cam member and the second cam member.

5. The gardening trimmer according to claim 4 , wherein
the first cam member comprises a first gear, and
the second cam member comprises a second gear engaged with the first gear.

6. The gardening trimmer according to claim 5 , wherein
the first gear is provided on an outer peripheral surface of the first cam member, and
the second gear is provided on an outer peripheral surface of the second cam member.

7. The gardening trimmer according to claim 6 , Wherein at least one of the first eccentric cam or the second eccentric cam is connected to a corresponding one of the first blade or the second blade via at least one link.

8. The gardening trimmer according to claim 7 , wherein
the first eccentric cam is connected to the first blade via a first link, and
the second eccentric cam is connected to the second blade via a second link.

9. The gardening trimmer according to claim 8 , wherein
the first link comprises a first base portion including a groove or a slot into which the first eccentric cam fits loosely and two first connection portions extending from the first base portion toward the first blade,
the second link comprises a second base portion including a groove or a slot into which the second eccentric cam fits loosely and a second connection portion extending from the second base portion toward the second blade, and
the second connection portion is located between the two first connection portions and extends parallel with the two first connection portions.

10. The gardening trimmer according to claim 1 , wherein a radius of an orbit along which the first eccentric cam is configured to revolve is equal to a radius of an orbit along which the second eccentric cam is configured to revolve.

11. The gardening trimmer according to claim 1 , wherein one of the first cam member and the second cam member is connected to the prime mover via another of the first cam member and the second cam member.

12. The gardening trimmer according to claim 11 , wherein
the first cam member comprises a first gear, and
the second cam member comprises a second gear engaged with the first gear.

13. The gardening trimmer according to claim 12 , wherein
the first gear is provided on an outer peripheral surface of the first cam member, and
the second gear is provided on an outer peripheral surface of the second cam member.

14. The gardening trimmer according to claim 1 , wherein at least one of the first eccentric cam or the second eccentric cam is connected to a corresponding one of the first blade or the second blade via at least one link.

15. The gardening trimmer according to claim 14 , wherein
the first eccentric cam is connected to the first blade via a first link, and
the second eccentric cam is connected to the second blade via a second link.

16. The gardening trimmer according to claim 15 , wherein
the first link comprises a first base portion including a groove or a slot into which the first eccentric cam fits loosely and two first connection portions extending from the first base portion toward the first blade,
the second link comprises a second base portion including a groove or a slot into which the second eccentric cam fits loosely and a second connection portion extending from the second base portion toward the second blade, and
the second connection portion is located between the two first connection portions and extends parallel with the two first connection portions.

Assignees

• Makita Corp

Inventors

• Sunazuka Ryo

Classifications

• A01G3/053 Primary

  motor-driven · CPC title

• A01D34/13

  Cutting apparatus · CPC title

• F16H25/14

  with reciprocation perpendicular to the axis of rotation (crank or eccentric gearings without swinging connecting-rod F16H21/36) · CPC title

• A01D34/10

  with motor driven cutters or wheels · CPC title

• A01G2003/0461

  with reciprocating knives · CPC title