Sanding machine

Patent metadata

Field	Value
Publication number	US-2025249544-A1
Application number	US-202519189487-A
Country	US
Kind code	A1
Filing date	Apr 25, 2025
Priority date	Nov 18, 2022
Publication date	Aug 7, 2025
Grant date	—

Abstract

A sander includes a body and a battery pack, The body includes a housing, an electric motor, a base plate, and a battery pack coupling portion, where the battery pack is mountable to the battery pack coupling portion; the electric motor is disposed in the housing and has a rotatable motor shaft; laminations of the electric motor are located between the battery pack and an output shaft; and the angle γ between an axis of the motor shaft and a plane where the base plate is located is greater than or equal to 0° and less than or equal to 25°.

First claim

What is claimed is:

1 . A sander, comprising:
a housing; a battery pack coupling portion to which a battery pack is mountable; an electric motor disposed in the housing and having a rotatable motor shaft; and a base plate comprising a sanding bottom surface capable of performing sanding; wherein an overall height H of the sander is less than or equal to 105 mm.

2 . The sander according to claim 1 , further comprising an output shaft, wherein the output shaft drives the base plate to rotate; and laminations of the electric motor are located between the battery pack and the output shaft.

3 . The sander according to claim 1 , wherein an angle γ between an axis of the motor shaft and a plane where the base plate is located is greater than or equal to 0° and less than or equal to 25°.

4 . The sander according to claim 2 , wherein, when the battery pack is mounted to the sander, a center of gravity of the sander is located between the battery pack and the output shaft.

5 . The sander according to claim 2 , wherein the overall height H is less than or equal to 100 mm.

6 . The sander according to claim 2 , further comprising a transmission assembly, wherein an input end of the transmission assembly is connected to the motor shaft, and an output end of the transmission assembly is connected to the output shaft.

7 . The sander according to claim 1 , further comprising an output shaft, wherein the output shaft drives the base plate to rotate; the battery pack is mountable to the battery pack coupling portion; on a plane parallel to the base plate, an axis of the output shaft is defined as a center, and, with a Y axis being parallel to a mounting plane of the battery pack and an X axis being perpendicular to the Y axis, an angle α between an axis of the motor shaft and a positive direction of the X axis is greater than or equal to 20°.

8 . The sander according to claim 1 , wherein an angle γ between an axis of the motor shaft and a plane where the base plate is located is greater than or equal to 5° and less than or equal to 15°.

9 . The sander according to claim 1 , wherein a control board is provided in the housing, and the motor shaft is spaced apart from the control board.

10 . The sander according to claim 1 , further comprising an operation key disposed at a top, on a side, or at a front end of the housing.

11 . The sander according to claim 10 , wherein the operation key is capable of controlling start and stop of the electric motor and/or regulating a rotational speed of the electric motor.

12 . The sander according to claim 1 , further comprising a display screen located at a top, on a side, or at a front end of a front side of the housing.

13 . The sander according to claim 1 , wherein, when the battery pack is mounted onto the battery pack coupling portion, a height of the battery pack in an up and down direction is less than or equal to a length of the battery pack in a left and right direction.

14 . The sander according to claim 1 , wherein an air duct is provided on the housing, an air outlet is provided at an end of the air duct, the air outlet faces a rear side of the housing, and the air duct extends in an arc shape in a direction away from the housing.

15 . The sander according to claim 6 , further comprising a gearbox, wherein the transmission assembly is disposed in the gearbox.

16 . The sander according to claim 15 , wherein a weight of the gearbox is greater than or equal to 20 g and less than or equal to 350 g.

17 . A sander, comprising:
a battery pack; and a body comprising a housing; a battery pack coupling portion to which the battery pack is mountable; a base plate; an electric motor disposed in the housing and having a rotatable motor shaft; and an output shaft for driving the base plate to rotate; wherein, when the battery pack is mounted to the battery pack coupling portion, the body and the battery pack form a whole machine, a center of gravity of the whole machine is located between the battery pack and the output shaft, and an overall height H of the sander is less than or equal to 105 mm.

18 . The sander according to claim 17 , wherein a weight of the whole machine is defined as a first weight W1, a maximum weight of the battery pack mountable to the body is defined as M0, and M0 is greater than or equal to 40% of W1.

19 . The sander according to claim 17 , wherein a weight of the body is defined as a second weight W2, and W2 is greater than or equal to 800 g and less than or equal to 1100 g.

20 . The sander according to claim 17 , wherein a weight of the battery pack is greater than or equal to 700 g and less than or equal to 1300 g.

Assignees

• Nanjing Chervon Ind Co Ltd

Inventors

• Zhang Lisong
• Liu Huan

Classifications

• B25F5/02

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

• B24B41/007

  Weight compensation; Temperature compensation; Vibration damping · CPC title

• B24B23/04

  with oscillating grinding tools; Accessories therefor · CPC title

• B24B23/02 Primary

  with rotating grinding tools; Accessories therefor · CPC title

• B25F5/006

  Vibration damping means · CPC title