Chainsaw

Patent metadata

Field	Value
Publication number	US-11518059-B2
Application number	US-202217835291-A
Country	US
Kind code	B2
Filing date	Jun 8, 2022
Priority date	Dec 31, 2019
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A chainsaw includes a main machine, a battery pack, and a connection assembly. The battery pack is configured to supply energy to the main machine. Moreover, the battery pack and the main machine are separated from each other. The connection assembly is configured to connect the main machine and the battery pack so that the battery pack is electrically connected to the main machine. The main machine includes a chain, a guide plate, a motor, and a housing. The chain is configured to perform a cutting function. The guide plate is configured to support the chain. The motor is configured to drive the chain to move. The housing is configured to accommodate at least part of the motor. The connection assembly is detachably connected to the main machine or the battery pack.

First claim

What is claimed is:

1. A chainsaw, comprising:
a main machine;
a battery pack configured to supply energy to the main machine, wherein the battery pack and the main machine are separated from each other; and
a connection assembly configured to connect the main machine and the battery pack so that the battery pack is electrically connected to the main machine,
wherein the main machine comprises:
a chain configured to perform a cutting function;
a guide plate configured to support the chain;
a motor configured to drive the chain to move; and
a housing configured to accommodate at least part of the motor;
wherein the connection assembly is detachably connected to the main machine or the battery pack, the guide plate extends forward out of the housing, and a ratio of a weight of the main machine to a length of a portion of the guide plate extending out of the housing is greater than or equal to 6 kg/m and less than or equal to 20 kg/m.

2. The chainsaw according to claim 1 , wherein the connection assembly comprises a safety component and the safety component is opened to make the connection assembly be capable of disconnecting the connection between the battery pack and the main machine when a force applied to the safety component is greater than or equal to a preset safety value.

3. The chainsaw according to claim 2 , wherein the connection assembly further comprises a safety rope, the safety component is mounted on the safety rope, and the safety component is configured to be connected to the main machine.

4. The chainsaw according to claim 3 , wherein the connection assembly further comprises a mounting base for the battery pack to be mounted on and a power cord comprising a first end configured to be connected to the battery pack or the mounting base and a second end configured to be connected to the main machine and the second end of the power cord is detachably connected to the main machine.

5. The chainsaw according to claim 4 , wherein the housing comprises a power insertion interface, an access terminal is disposed inside the power insertion interface, the second end of the power cord is provided with a power output interface detachably connected to the power insertion interface, the safety component is a safety valve, and the safety valve is opened so that the safety component is disconnected from the main machine and so that the power cord is separated from the power insertion interface when a force applied to the safety valve is greater than or equal to the preset safety value.

6. The chainsaw according to claim 2 , wherein the preset safety value is greater than or equal to 15 pounds and less than or equal to 400 pounds.

7. The chainsaw according to claim 2 , wherein the preset safety value is greater than or equal to 25 pounds and less than or equal to 200 pounds.

8. The chainsaw according to claim 4 , wherein the mounting base comprises a base configured to combine the battery pack and a connector configured to make the mounting base mounted to a waistband of a user, and the connector is a flexible member.

9. The chainsaw according to claim 4 , wherein the mounting base comprises a base configured to combine the battery pack, a first connector configured to make the mounting base mounted to a waistband of a user in a first connection manner, and a second connector configured to make the mounting base mounted to a waistband of a user in a second connection manner, and the first connector is a non-flexible member, and the second connector is a flexible member.

10. The chainsaw according to claim 1 , wherein the connection assembly comprises a mounting base for the battery pack to be mounted on and a power cord comprising a first end configured to be connected to the battery pack or the mounting base and a second end configured to be connected to the main machine, the mounting base comprises a base configured to combine the battery pack and a connector configured to make the mounting base mounted to a waistband of a user, and the connector is a flexible member.

11. The chainsaw according to claim 3 , wherein the connection assembly further comprises a mounting base for the battery pack to be mounted on and a power cord comprising a first end configured to be connected to the battery pack or the mounting base and a second end configured to be connected to the main machine.

12. The chainsaw according to claim 11 , wherein the safety rope surrounds a surface of the power cord.

13. The chainsaw according to claim 11 , wherein a length of the safety rope is substantially fixed.

14. The chainsaw according to claim 11 , wherein the safety rope is a non-elastic rope.

15. The chainsaw according to claim 11 , wherein a ratio of a length of the power cord to the length of the portion of the guide plate extending out of the housing is greater than or equal to 2 and less than or equal to 10.

16. The chainsaw according to claim 11 , wherein the power cord comprises a wire core and an insulating sleeve surrounding the wire core, the safety rope has a length direction, the safety rope is formed with a through hole extending through the safety rope along the length direction, and at least one end of the insulating sleeve passes through the safety rope.

17. The chainsaw according to claim 5 , wherein the housing comprises a main handle, the main handle is disposed on an upper side of the housing, the power insertion interface is disposed on a left side of the main handle, and the guide plate is disposed on a right side of the main handle.

18. The chainsaw according to claim 5 , wherein the housing further comprises a front end surface formed with a front port for the guide plate to extend out and a rear end surface opposite to the front end surface and, in a front and rear direction, the power insertion interface is disposed between the front end surface and the rear end surface.

19. The chainsaw according to claim 5 , wherein the power insertion interface is formed with a connection port opened rearward and the second end of the power cord is inserted in the power insertion interface through the connection port.

20. The chainsaw according to claim 1 , wherein the ratio of the weight of the main machine to the length of the portion of the guide plate extending out of the housing is greater than or equal to 8.5 kg/m and less than or equal to 13 kg/m.

21. The chainsaw according to claim 1 , wherein a ratio of an output power of the motor to the weight of the main machine is greater than or equal to 250 W/kg and less than or equal to 800 W/kg.

Assignees

• Nanjing Chervon Ind Co Ltd

Inventors

• Li Li
• Dai Kaichao
• Zhang Chenzhong
• Wu Hekun
• Li Haiyan

Classifications

• B25F5/02 Primary

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title

• B27B17/0008

  Means for carrying the chain saw, e.g. handles (B27B17/0033 takes precedence) · CPC title

• B27B17/02 Primary

  Chain saws equipped with guide bar (B27B17/06 takes precedence) · CPC title

• H01M50/247

  specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title