US-12617118-B2 - Power tool

US12617118B2US 12617118 B2US12617118 B2US 12617118B2US-12617118-B2

Abstract

A power tool includes a housing, a driving device, a cutting device and an oil storage device. The driving device, the cutting device and the oil storage device are all mounted in the housing. The driving device may drive the cutting device to work, and the oil storage device provides lubricating oil to the cutting device. The oil storage device includes an oil reservoir and an oil pump, the oil reservoir is connected with the oil pump through a first oil pipe, and a filtering structure is arranged between the first oil pipe and the oil reservoir to filter the lubricating oil entering the oil pump from the oil reservoir. The oil reservoir provides lubricating oil to the cutting device through the oil pump. The oil storage device of the disclosure may effectively improve a clogging problem of the oil pump and improve a duration life of the power tool.

Inventors

Xinxin YU
Lingao Zhang

Assignees

GREENWORKS (JIANGSU) CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20231109
Priority Date: 20210521

Claims (16)

1 . A power tool, comprising: a housing; a driving device, arranged in the housing; a cutting device, arranged in the housing and driven by the driving device; and an oil storage device, arranged in the housing and configured to provide lubricating oil to the cutting device; wherein, the oil storage device comprises an oil reservoir and an oil pump, the oil reservoir is connected with the oil pump through a first oil pipe, a filtering structure is arranged between the first oil pipe and the oil reservoir to filter the lubricating oil entering the oil pump from the oil reservoir, and the oil reservoir provides the lubricating oil to the cutting device through the oil pump; and wherein the oil reservoir is provided with an oil reservoir outlet connected with the first oil pipe, the filtering structure comprises a claw, a first filter body and a filter spring, the claw is arranged on an end of the first oil pipe connected with the oil reservoir outlet, the claw is provided with a first oil inlet hole communicating with the first oil pipe, the first filter body is arranged in the claw, and the filter spring is sleeved on the claw and fixes the first filter body in the claw.
2 . The power tool according to claim 1 , wherein the claw comprises a pipe part, a claw plate and claw teeth connected sequentially, an outer diameter of the pipe part fits an inner diameter of the first oil pipe, a diameter of the claw plate is larger than an outer diameter of the first oil pipe, the claw plate is provided with the first oil inlet hole communicating with the pipe part, and the claw teeth are arranged at intervals along a circumferential direction of the claw plate to enclose an accommodating cavity of the first filter body.
3 . The power tool according to claim 1 , wherein the filter spring comprises a cylindrical spring and a conical spring, the cylindrical spring is sleeved outside the claw, and the conical spring is blocked on an opening of the claw.
4 . The power tool according to claim 1 , wherein a joint of the first oil pipe and the oil reservoir outlet is provided with a leak-proof structure, the leak-proof structure comprises a cylindrical outer wall, a first flange and a second flange arranged on two sides of the cylindrical outer wall, the cylindrical outer wall fits on an outer wall of the first oil pipe and coupled with the oil reservoir outlet, the first flange is located inside the oil reservoir outlet, the second flange is located outside the oil reservoir outlet, and the first flange and the second flange are pressed tightly on surrounding walls of the oil reservoir outlet and seal the surrounding walls of the oil reservoir outlet.
5 . The power tool according to claim 1 , wherein a joint of the oil reservoir and the first oil pipe is provided with an oil nozzle protruding from a surface of the oil reservoir, the filtering structure comprises a filter bracket and a second filter body, the second filter body is arranged in the filter bracket, and the filter bracket is arranged in the oil nozzle.
6 . The power tool according to claim 5 , wherein the filter bracket comprises a filter tube and a blocking part arranged at an end of the filter tube, the blocking part is provided with a through hole communicating with the filter tube, an outer diameter of the filter tube fits an inner diameter of the oil nozzle, and an outer diameter of the blocking part is larger than an outer diameter of the oil nozzle.
7 . The power tool according to claim 6 , wherein a side wall of the filter tube is provided with a plurality of second oil inlet holes along a circumference, and the second filter body is distributed in the second oil inlet holes.
8 . The power tool according to claim 7 , wherein the second filter body is a filter screen, and the filter bracket and the filter screen are integrally structured.
9 . The power tool according to claim 5 , wherein an inner diameter of the first oil pipe fits an outer diameter of the oil nozzle, and the first oil pipe is tightly sleeved on the oil nozzle.
10 . The power tool according to claim 1 , wherein the oil storage device further comprises an oil reservoir cap, the oil reservoir cap comprises a cover body, a cavity, a one-way venting structure and a pulling wire, the cover body is screwed to the oil reservoir, and the cavity is arranged inside of the cover body and is concave toward the oil reservoir, a side of the cavity away from the oil reservoir is provided with an air inlet hole, a side of the cavity facing the oil reservoir is provided with an air outlet, the one-way venting structure is arranged in the cavity, a first end of the pulling wire is connected to the cover body on one side of the cavity, and a second end of the pulling wire extends into the oil reservoir to be connected with a blocking body that is capable of entering into the oil reservoir.
11 . The power tool according to claim 10 , wherein the one-way venting structure comprises a one-way air intake valve and a third filter body, the one-way air intake valve is arranged in the cavity, and the third filter body is arranged in the air inlet hole to seal the air inlet hole.
12 . The power tool according to claim 1 , wherein the housing comprises a first housing, a second housing and a motor supporting pad, an interior of the first housing is provided with a plurality of first supporting ribs, an interior of the second housing is provided with a plurality of second supporting ribs, after the first housing is fastened with the second housing, the first supporting ribs and the second supporting ribs enclose to form a motor accommodating cavity that matches a brushed motor, the motor supporting pad is detachably arranged on the first supporting rib and the second supporting rib, and an inner diameter of the motor supporting pad fits a size of a brushless motor.
13 . The power tool according to claim 12 , wherein a side surface of the motor supporting pad in contact with the first supporting ribs and the second supporting ribs is provided with a washer groove to accommodate the supporting ribs, and the side surface of the motor supporting pad in contact with the brushless motor is provided with an arc-shaped matching surface matched with the brushless motor.
14 . The power tool according to claim 13 , wherein both the first housing and the second housing are provided with windshields corresponding to the motor accommodating cavity, and the motor supporting pad separates the windshields at a head of a motor from the windshields at an output end of the motor.
15 . A power tool, comprising: a housing; a driving device, arranged in the housing; a cutting device, arranged in the housing and driven by the driving device; and an oil storage device, arranged in the housing and configured to provide lubricating oil to the cutting device; wherein, the oil storage device comprises an oil reservoir and an oil pump, the oil reservoir is connected with the oil pump through a first oil pipe, a filtering structure is arranged between the first oil pipe and the oil reservoir to filter the lubricating oil entering the oil pump from the oil reservoir, and the oil reservoir provides the lubricating oil to the cutting device through the oil pump; and the filtering structure comprises a claw and a first filter body, the claw is disposed within the first oil pipe, and the first filter body is arranged in the claw.
16 . The power tool according to claim 15 , wherein the filtering structure further comprises a filter spring, the filter spring being sleeved over the claw to secure the first filter body in the claw.

Description

CROSS REFERENCE TO RELATED APPLICATION The present application is a continuation Application of PCT application No. PCT/CN2022/092223 filed on May 11, 2022, which claims the benefit of CN202121113117.2 filed on May 21, 2021, CN202121111547.0 filed on May 21, 2021, CN202121111753.1 filed on May 21, 2021, CN202121107942.1 filed on May 21, 2021. All the above are hereby incorporated by reference. TECHNICAL FIELD The disclosure relates to a technical field of cutting tools, in particular to a power tool. BACKGROUND Power tools usually need lubricating oil to lubricate the cutting parts, but since there is a lot of dust in the cutting environment, impurities around the tool will fall into the oil reservoir, and the oil pump will easily cause blockage inside the oil pump after the impurities are sucked in, which results in the failure of the lubrication system of the power tool and affect the duration life of power tools. SUMMARY The disclosure provides a power tool to improve a problem of internal clogging of an oil pump of an oil storage device. The disclosure provides a power tool, including a housing, a driving device, a cutting device and an oil storage device. The driving device is arranged in the housing. The cutting device is arranged in the housing and driven by the driving device. The oil storage device is arranged in the housing and used to provides lubricating oil to the cutting device. Wherein, the oil storage device includes an oil reservoir and an oil pump, the oil reservoir is connected with the oil pump through a first oil pipe, and a filtering structure is arranged between the first oil pipe and the oil reservoir to filter the lubricating oil entering the oil pump from the oil reservoir. The oil reservoir provides the lubricating oil to the cutting device through the oil pump. In an embodiment of the disclosure, the oil reservoir is provided with an oil reservoir outlet connected with the first oil pipe, the filtering structure includes a claw, a first filter body and a filter spring, the claw is arranged on an end of the first oil pipe connected with the oil reservoir outlet, the claw is provided with a first oil inlet hole communicating with the first oil pipe, the first filter body is arranged on the in the claw, and the filter spring is sleeved on the claw and fixes the first filter body in the claw. In an embodiment of the disclosure, the claw includes a pipe part, a claw plate and claw teeth connected sequentially, an outer diameter of the pipe part fits an inner diameter of the first oil pipe, a diameter of the claw plate is larger than an outer diameter of the first oil pipe, the claw plate is provided with the first oil inlet hole communicating with the pipe part, and the claw teeth are arranged at intervals along a circumferential direction of the claw plate to enclose an accommodating cavity of the first filter body. In an embodiment of the disclosure, the first filter body is a filter sponge. In an embodiment of the disclosure, the filter spring includes a cylindrical spring and a conical spring, the cylindrical spring is sleeved outside the claw, and the conical spring is blocked on an opening of the claw. In an embodiment of the disclosure, a joint of the first oil pipe and the oil reservoir outlet is provided with a leak-proof structure, the leak-proof structure includes a cylindrical outer wall, a first flange and a second flange arranged on two sides of the cylindrical outer wall, the cylindrical outer wall fits on an outer wall of the first oil pipe and coupled with the oil reservoir outlet, the first flange is located inside the oil reservoir outlet, the second flange is located outside the oil reservoir outlet, and the first flange and the second flange are pressed tightly on surrounding walls of the oil reservoir outlet and seal the surrounding walls of the oil reservoir outlet. In an embodiment of the disclosure, an outer side of the second flange is provided with a third flange connected with the second flange. In an embodiment of the disclosure, a joint of the oil reservoir and the first oil pipe is provided with an oil nozzle protruding from a surface of the oil reservoir, the filtering structure includes a filter bracket and a second filter body, the second filter body is arranged in the filter bracket, and the filter bracket is arranged in the oil nozzle. In an embodiment of the disclosure, the filter bracket includes a filter tube and a blocking part arranged at an end of the filter tube, the blocking part is provided with a through hole communicating with the filter tube, an outer diameter of the filter tube fits an inner diameter of the oil nozzle, and an outer diameter of the blocking part is larger than an outer diameter of the oil nozzle. In an embodiment of the disclosure, a side wall of the filter tube is provided with a plurality of second oil inlet holes along a circumference, and the second filter body is distributed in the second oil inlet holes. In an embo