Hedge trimmer

Patent metadata

Field	Value
Publication number	US-11622507-B2
Application number	US-202117161826-A
Country	US
Kind code	B2
Filing date	Jan 29, 2021
Priority date	Sep 7, 2018
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

A hedge trimmer includes a blade assembly having a first blade and a second blade, a housing, a prime mover, and a transmission device. The first blade includes a first body portion and a plurality of first tooth portions, and the second blade includes a second body portion and a plurality of second tooth portions. The first blade includes a first connection assembly including a first driving portion and a first connecting portion, and the second blade includes a second connection assembly including a second driving portion and a second connecting portion. The first connecting portion and the first body portion form a detachable connection, the second connecting portion and the second body portion form a detachable connection, and the first connecting portion is at least partially located outside the housing.

First claim

What is claimed is:

1. A hedge trimmer, comprising:
a blade assembly comprising a first blade and a second blade that perform a cutting function with a relative motion;
a housing formed with an accommodating cavity;
a prime mover arranged inside the accommodating cavity; and
a transmission device for realizing power transmission between the prime mover and the blade assembly to drive the first blade and the second blade to produce the relative motion,
wherein the first blade comprises a first body portion extending along a first straight line, a plurality of first tooth portions configured to cut vegetation, a first connection assembly comprising a first driving portion connected with the transmission device to introduce a driving force output by the transmission device into the first blade, and a first connecting portion connected with the first body portion to make the first body portion move with the first driving portion,
the second blade comprises a second body portion extending along a second straight line, a plurality of second tooth portions configured to cut vegetation, a second connection assembly comprising a second driving portion connected with the transmission device to introduce a driving force output by the transmission device into the second blade, and a second connecting portion connected with the second body portion to make the second body portion move with the second driving portion,
the first connecting portion and the first body portion form a detachable connection, the second connecting portion and the second body portion form a detachable connection, and the first connecting portion is at least partially located outside the housing,
wherein the blade assembly further comprises a support bar for supporting the first blade and a second blade, the hedge trimmer further comprises a stopper enabled to restrict the first body portion from being detached from the first connecting portion, and the stopper has a limiting state that restricts the first body portion from being detached from the first connecting portion and an unlocked state that allows the first body portion to be detached from the first connecting portion, and
wherein the support bar is arranged on an upper side of a whole composed of the first blade and the second blade, the stopper is arranged on a lower side of the whole composed of the first blade and the second blade, the support bar comprises a first portion located in the housing and a second portion located outside the housing, a length of the stopper is less than the support bar, the stopper comprises a third portion located in the housing and a forth portion located outside the housing, and the forth portion is configured to operate by an operator without opening the housing so that the stopper is switched between the limiting state and the unlocked state.

2. The hedge trimmer of claim 1 , wherein the first body portion and the first connecting portion form a detachable connection along a direction perpendicular to the first straight line and the second body portion and the second connecting portion form a detachable connection along a direction perpendicular to the second straight line.

3. The hedge trimmer of claim 1 , wherein the first body portion extends in a first plane, the first connecting portion extends in a second plane, the first plane and the second plane are parallel and do not overlap, the second body portion extends in a third plane, the second connecting portion extends in a fourth plane, and the third plane and the fourth plane are parallel and do not overlap.

4. The hedge trimmer of claim 1 , wherein the first body portion and the first connecting portion are located at different heights at a first connection point between the first body portion and the first connecting portion and the second body portion and the second connecting portion are located at different heights at a second connection point between the second body portion and the second connecting portion.

5. The hedge trimmer of claim 1 , wherein the first driving portion and the first connecting portion are integrally formed and the second driving portion and the second connecting portion are integrally formed.

6. The hedge trimmer of claim 1 , wherein the first connecting portion is formed or connected with a connecting member and the first body portion is formed with a mating hole for receiving the connecting member.

7. The hedge trimmer of claim 6 , wherein a direction that the first body portion detaches from the first connecting portion is defined to be a first direction, the first blade is arranged on a lower side of the second blade, the stopper prevents the first body portion from being detached from the first connecting portion along the first direction, and the first direction and the first straight line are perpendicular to each other.

8. The hedge trimmer of claim 7 , wherein the hedge trimmer further comprises one or two screws for positioning the stopper in the limiting state and the one or two screws are located outside the housing.

9. The hedge trimmer of claim 7 , wherein the hedge trimmer further comprises a further screw for positioning the stopper in the limiting state.

10. The hedge trimmer of claim 7 , wherein the hedge trimmer also comprises a first type of screw passing through the stopper along a third straight line direction perpendicular to the first straight line and a plurality of a second type of screws that pass through the first blade and the second blade along a fourth straight line direction perpendicular to the first straight line and do not pass through the stopper, the first body portion is formed with a plurality of mounting holes for the plurality of the second type of screws to pass through, and each of the plurality of mounting holes comprises a sliding portion that allows the plurality of the second type of screws to slide along a direction parallel to the first straight line while preventing the plurality of second type of screws from being removed from the plurality of mounting holes and a through hole portion that allows the first body portion to be detached from the plurality of second type of screws in a direction perpendicular to the first straight line.

11. The hedge trimmer of claim 10 , wherein a maximum size of the sliding portion in a width direction is smaller than a maximum size of the through hole portion in a width direction.

12. The hedge trimmer of claim 11 , wherein each of the plurality of mounting holes is also formed with a guide portion provided at a connection point between the sliding portion and the through hole portion, the guide portion guides the plurality of second type of screws to sequentially engage with a corresponding plurality of mounting holes when assembling the first body portion, and the guide portion guides the plurality of second type of screws to sequentially disengage with the corresponding plurality of mounting holes when disassembling the first body portion.

13. A hedge trimmer, comprising:
a blade assembly comprising a first blade and a second blade that perform a cutting function with a relative motion;
a housing formed with an accommodating cavity;
a prime mover arranged inside the accommodating cavity; and
a transmission device for realizing power transmission between the prime mover and the blade assembly to drive the first blade and the second blade to produce the relative motion,
wherein the first blade comprises a first body portion extending along a first straight line, a plurality of first tooth portions configured to cut vegetation, a first connection assembly comprising a first driving portion connected with the transmission device to introduce

Assignees

• Nanjing Chervon Ind Co Ltd

Inventors

• Li Li
• Wu Hekun

Classifications

• A01G3/053 Primary

  motor-driven · CPC title

• A01G3/037 Primary

  the driving means being an electric motor · CPC title

• A01G3/08

  Other tools for pruning, branching or delimbing standing trees · CPC title

• A01G2003/0461

  with reciprocating knives · CPC title