CN-114054847-B - Power tool

Abstract

The invention provides a power tool which comprises a motor, a tool shell, a fan, a battery pack and a controller, wherein the tool shell comprises a motor shell which accommodates the motor and a holding shell, the fan is driven by the motor to rotate to generate cooling air flow, the tool shell is provided with an air flow channel, the air flow channel comprises a first air flow channel and a second air flow channel which are independent relatively, the battery pack is used for supplying power to the motor and comprises a shell and a battery core accommodated in the shell, the shell comprises an air inlet and an air outlet, the air inlet and the air outlet are communicated to form a battery pack air flow channel, when the battery pack is combined to the tool shell, the battery pack air flow channel is communicated with the first air flow channel, and the controller is used for controlling the motor, and at least part of the controller is arranged in the second air flow channel. According to the power tool disclosed by the invention, the battery pack and the controller are respectively cooled through the two independent air flow channels, so that the cooling efficiency is improved, and the requirement of cutting operation is met.

Inventors

• LIU BINGJIAN
• ZHANG XIANGLIANG
• JI SHAOSHAN

Assignees

• 苏州宝时得电动工具有限公司

Dates

Publication Date

20260508

Application Date

20200805

Claims (9)

1. 1. A power tool is characterized in that the power tool comprises: A motor for driving the working head to work; The tool shell comprises a motor shell for accommodating the motor and a holding shell, and a through hole and an air outlet are formed in the motor shell; A fan driven by the motor to rotate so as to generate cooling air flow, wherein the tool shell is provided with an air flow channel for the cooling air flow to pass through; A partition extending to the through hole of the motor casing to partition the air flow channel into a first air flow channel and a second air flow channel, wherein the first air flow channel is independent of the second air flow channel; A battery pack for powering the motor, comprising a housing and a battery core housed in the housing, the housing comprising an air inlet and an air outlet, the air inlet and the air outlet communicating to form a battery pack airflow channel, the battery pack airflow channel communicating with the first airflow channel when the battery pack is coupled to the tool housing; A controller for controlling the motor, the controller being at least partially disposed in the second airflow passage; the same fan is driven by the motor to rotate, cooling air flows entering from the first cooling air inlet and flowing through the first air flow channel and cooling air flows entering from the second cooling air inlet and flowing through the second air flow channel, cooling air flows flowing through the first air flow channel and the second air flow channel, flowing through the through holes and entering the motor casing, converging in the motor casing to cool the motor, and then discharging from the air outlet.
2. 2. The power tool according to claim 1, wherein the motor is an outer rotor type motor.
3. 3. The power tool of claim 1, wherein the motor housing includes a first end portion adjacent the working head and a second end portion remote from the working head, the fan being disposed within the first end portion, an air outlet being provided at the first end portion, cooling air entering through the battery pack air flow passage flowing through the first cooling air outlet into the first air flow passage exiting the tool housing through the air outlet, and cooling air entering through the second cooling air outlet flowing through the second air flow passage exiting the tool housing through the air outlet.
4. 4. The power tool of claim 1, wherein the motor housing includes a first end portion adjacent to the working head and a second end portion remote from the working head, the fan is disposed in the first end portion, the second end portion is provided with an air inlet, cooling air flowing in from the air inlet flows through the first air flow channel and the second air flow channel respectively, cooling air in the first air flow channel is discharged from the battery pack air flow channel after passing through the first cooling air inlet, and cooling air in the second air flow channel is discharged from the second cooling air inlet after passing through the controller.
5. 5. The power tool of claim 1, wherein the motor housing includes a first end proximate the working head and a second end distal the working head, the fan being disposed within the second end, an air outlet being provided at the second end, cooling air flowing through the first cooling air inlet from the battery pack air flow passage into the first air flow passage and cooling air flowing through the second cooling air inlet into the second air flow passage from the air outlet exiting the tool housing after passing through the motor.
6. 6. The power tool of claim 1, wherein a divider is disposed within the tool housing, and wherein the controller includes a circuit board, and a housing supporting and at least partially surrounding the circuit board, wherein the divider and the housing cooperate to divide the airflow path into the first airflow path and the second airflow path.
7. 7. The power tool of claim 1, wherein the controller comprises a circuit board, a housing supporting and at least partially enclosing the circuit board, and wherein a divider is provided on the housing, the divider cooperating with the housing to divide the airflow path into the first airflow path and the second airflow path.
8. 8. The power tool of claim 1, wherein the grip housing includes a grip portion, a mounting portion coupled to the grip portion, and a connecting portion, wherein the mounting portion is configured to mount the battery pack, and wherein the airflow passage is at least partially located within the connecting portion.
9. 9. The power tool according to claim 8, wherein a baffle is provided between the first cooling port and the grip portion.

Description

Power tool Technical Field The invention relates to a power tool, in particular to a power tool powered by a battery pack. Background Power tools are currently widely used in hand operations. The circular saw is taken as an example, a typical direct current power tool is powered by a battery pack, the heat dissipation requirement is high, a motor drives a saw blade to carry out sawing operation through a transmission mechanism, a controller is arranged in the tool to control the motor, and the battery pack, the controller and the motor generate heat in the working process, so that the temperature is too high, the usability of the tool is affected, and potential safety hazards are brought. In order to solve the above problems, the conventional electric circular saw is provided with a fan, an air inlet hole and an air outlet hole, and generates flowing cooling air flow to dissipate heat. However, in the conventional electric circular saw, air for the battery pack and the controller flows in the same air passage, and the air flow, which has previously cooled the battery pack and the temperature of which increases, cools the controller again, reducing cooling efficiency. Accordingly, it is necessary to provide a power tool to solve the above-described problems. Disclosure of Invention In order to overcome the defects in the prior art, the invention aims to provide a power tool which can effectively cool a battery pack and a controller and has a compact structure. In order to solve the problems, the power tool comprises a motor, a tool shell, a fan, a first air flow channel, a second air flow channel, a battery pack and a controller, wherein the motor drives a working head to work, the tool shell comprises a motor shell for accommodating the motor and a holding shell, the motor shell is driven to rotate by the motor to generate cooling air flow, the tool shell is provided with the air flow channel for allowing the cooling air flow to pass through, the air flow channel comprises a first air flow channel and a second air flow channel, the first air flow channel is independent of the second air flow channel, the tool shell is provided with a first cooling air inlet communicated with the first air flow channel and a second cooling air inlet communicated with the second air flow channel, the battery pack is used for supplying power to the motor and comprises a shell and a battery core accommodated in the shell, the shell comprises an air inlet and an air outlet, the air inlet and the air outlet are communicated with each other to form a battery pack air flow channel, and the controller is used for controlling the motor and is at least partially arranged in the second air flow channel when the battery pack is combined to the tool shell. The power tool provided by the invention is provided with two independent air flow channels for cooling the battery pack and the controller respectively, so that two air flows for cooling the battery pack and the controller are not influenced, the battery pack and the controller can be fully cooled, the cooling efficiency is improved, and the requirement of cutting operation is met. Preferably, the motor is an outer rotor type motor. The outer rotor type motor is adopted, so that the torque is large, the volume is small, and the tool volume can be further reduced while the cutting efficiency is ensured. Preferably, the motor casing comprises a first end part close to the working head and a second end part far away from the working head, the fan is arranged in the first end part, an air outlet is arranged at the first end part, cooling air entering from the battery pack air flow channel flows through the first cooling air inlet to enter the first air flow channel and is discharged from the tool casing through the air outlet, and cooling air entering from the second cooling air inlet flows through the second air flow channel and is discharged from the tool casing through the air outlet. Preferably, the motor casing includes a first end portion close to the working head and a second end portion far away from the working head, the fan is disposed in the first end portion, the second end portion is provided with an air inlet, cooling air flow entering through the air inlet flows through the first air flow channel and the second air flow channel respectively, cooling air flow in the first air flow channel is discharged through the battery pack air flow channel after passing through the first cooling air inlet, and cooling air flow in the second air flow channel is discharged through the second cooling air inlet after passing through the controller. Preferably, the motor casing includes a first end portion close to the working head and a second end portion far away from the working head, the fan is disposed in the second end portion, an air outlet is formed in the second end portion, cooling air flows from the battery pack air flow channel through the first cooling air inlet into the first ai