Handheld band saw

Patent metadata

Field	Value
Publication number	US-12415225-B2
Application number	US-202318446239-A
Country	US
Kind code	B2
Filing date	Aug 8, 2023
Priority date	Aug 17, 2022
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A handheld band saw includes a housing assembly including a battery pack mounting portion for mounting a battery pack, a rotating wheel assembly at least partially disposed in the housing assembly and including a first rotating wheel and a second rotating wheel, where the first rotating wheel and the second rotating wheel are configured to be substantially symmetrical about a midplane, an electric motor disposed in the housing assembly and capable of driving one of the first rotating wheel and the second rotating wheel to rotate, a fan which is capable of generating at least one airflow in the housing assembly, and a control circuit board disposed in the housing assembly.

First claim

What is claimed is:

1. A handheld band saw, comprising:
a housing assembly comprising a battery pack mounting portion for mounting a battery pack and a main handle formed with an accommodating space;
a rotating wheel assembly at least partially disposed in the housing assembly and comprising a first rotating wheel and a second rotating wheel, wherein the first rotating wheel and the second rotating wheel are configured to be substantially symmetrical about a midplane;
an electric motor disposed in the housing assembly and capable of driving one of the first rotating wheel and the second rotating wheel to rotate;
a fan which is capable of generating an airflow in the housing assembly during rotation; and
a control circuit board disposed in the accommodating space of the housing assembly,
wherein the control circuit board is disposed on a side of the midplane facing the electric motor, the electric motor and the battery pack mounting portion are located on two sides of the midplane, the housing assembly is formed with an air inlet and an air outlet and, when the fan rotates, the airflow entering the housing assembly from the air inlet flows through at least the control circuit board and the electric motor.

2. The handheld band saw according to claim 1 , wherein, when the fan rotates, the airflow entering the housing assembly from the air inlet flows through the control circuit board and then flows through the electric motor.

3. The handheld band saw according to claim 1 , wherein the main handle is provided with the air inlet.

4. The handheld band saw according to claim 3 , wherein the housing assembly comprises an electric motor housing formed with an interior space for accommodating the electric motor, the interior space communicates with the accommodating space, and the electric motor housing comprises a connection port from which the airflow enters the interior space.

5. The handheld band saw according to claim 4 , wherein a flow guide structure disposed at an end of the main handle facing the electric motor is disposed in the accommodating space, the flow guide structure comprises a first guide portion and a second guide portion, and the first guide portion and the second guide portion cooperate with an inner wall of the main handle so that the airflow flows to the control circuit board and then flows to the connection port.

6. The handheld band saw according to claim 3 , wherein the air inlet is disposed at a left end of the main handle, and the housing assembly is provided with the air outlet which is adjacent to the fan.

7. The handheld band saw according to claim 1 , wherein the control circuit board is disposed in the main handle and is configured to be adjacent to a left end of the main handle.

8. The handheld band saw according to claim 1 , wherein the handheld band saw further comprises an auxiliary handle portion connected to the battery pack mounting portion.

9. The handheld band saw according to claim 8 , wherein the main handle is configured to be substantially symmetrical about a handle midplane, and the auxiliary handle portion and the electric motor are located on a same side of the handle midplane.

10. The handheld band saw according to claim 1 , wherein the air outlet and the air inlet are disposed on a same side of the midplane.

11. The handheld band saw according to claim 1 , wherein the air outlet, the air inlet, and the control circuit board are disposed on one side of the midplane, and the battery pack mounting portion is located on another side of the midplane.

12. The handheld band saw according to claim 1 , further comprising a shield assembly connected to the housing assembly and having at least a first state in which the shield assembly is fixed relative to the housing assembly and is capable of substantially covering the rotating wheel assembly and a second state in which the shield assembly is movable relative to the housing assembly, and
a locking device connected to the housing assembly and comprising at least one group of locking assemblies, wherein each of the at least one group of locking assemblies comprises:
a driving member having an open position which is retainable and a closed position which is retainable, wherein the shield assembly is in the second state when the driving member is at the open position, and the shield assembly is capable of being in the first state when the driving member is at the closed position;
a stopper cooperating with the driving member so that the driving member is retainable at the open position or the closed position; and
a biasing member providing a driving force for the driving member so that the driving member is always retained at a current position without being driven by an external force.

13. The handheld band saw according to claim 12 , wherein the electric motor drives the first rotating wheel to rotate, the housing assembly comprises a first rotating wheel housing which substantially accommodates the first rotating wheel and a second rotating wheel housing which substantially accommodates the second rotating wheel, the shield assembly comprises a shield housing capable of mating with the first rotating wheel housing and the second rotating wheel housing to substantially cover the first rotating wheel and the second rotating wheel, and the first rotating wheel housing is provided with a chip discharging port.

14. A handheld band saw, comprising:
a housing assembly comprising a battery pack mounting portion for mounting a battery pack;
a rotating wheel assembly at least partially disposed in the housing assembly and comprising a first rotating wheel and a second rotating wheel, wherein the first rotating wheel and the second rotating wheel are configured to be substantially symmetrical about a midplane;
an electric motor disposed in the housing assembly and capable of driving one of the first rotating wheel and the second rotating wheel to rotate;
a control circuit board disposed in the housing assembly; and
a fan which is capable of generating an airflow flowing through the control circuit board in the housing assembly during rotation,
wherein the control circuit board and the electric motor are located on a same side of the midplane,
wherein the housing assembly comprises a main handle formed with an accommodating space, the control circuit board is disposed in the accommodating space, and the main handle is provided with an air inlet, and
wherein the air inlet is disposed at a left end of the main handle, and the housing assembly is provided with an air outlet which is adjacent to the fan.

15. The handheld band saw according to claim 14 , wherein the airflow flows through the control circuit board and then flows to the electric motor.

Assignees

• Nanjing Chervon Ind Co Ltd

Inventors

• Zhou Yang
• Gao Hao

Classifications

• B23D59/006

  for removing or collecting chips · CPC title

• B23D55/065

  of wheels · CPC title

• B23D55/082

  Devices for guiding strap saw blades · CPC title

• B23D55/02

  of frames; of tables · CPC title

• B25F5/008

  Cooling means · CPC title