Miter saw

Patent metadata

Field	Value
Publication number	US-10888939-B2
Application number	US-201916572782-A
Country	US
Kind code	B2
Filing date	Sep 17, 2019
Priority date	Nov 6, 2018
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

A miter saw that includes a base, a worktable arranged on the base and defining a worktable plane, and a cutting head formed with or connected to an operating member operable by a user. The cutting head further includes a circular saw blade operative to rotate around a first axis and a motor operative to drive the circular saw blade. A fence is arranged on the worktable. The cutting head is further connected to a first guiding member configured for guiding chips to be discharged. The fence is formed with a guiding portion. The cutting head is operative to rotate around a second axis parallel to the worktable plane and, when the cutting head rotates around the second axis, the guiding portion is operative to guide the first guiding member to cross the fence.

First claim

What is claimed is:

1. A miter saw, comprising:
a base;
a worktable arranged on the base and defining a worktable plane;
a cutting head formed with or connected to an operating member operable by a user, wherein the cutting head further comprises a circular saw blade rotatable around a first axis and a motor for driving the circular saw blade; and
a fence arranged on the worktable;
wherein the cutting head is connected with a first guiding member configured to guide chips to be discharged, the fence is formed with a guiding portion, the cutting head is operative to rotate around a second axis parallel to the worktable plane, and in response to the cutting head rotating around the second axis, the guiding portion is operative to guide the first guiding member to cross the fence.

2. The miter saw of claim 1 , further comprising a guide rail, arranged above the worktable and extending along a front-and-rear orientation of the worktable and capable of sliding in the font-and-rear orientation relative to the worktable and a roller disposed at a rear side of the first guiding member, wherein in response to the cutting head, which is a fixedly connected to a front end portion of the guide rail, being moved along the front-and-rear orientation of the slide rail and being rotated around the second axis relative to the worktable, the roller is operative to guide the first guiding member to cross the guiding portion.

3. The miter saw of claim 2 , wherein the first guiding member comprises a main body formed with or connected with a rolling shaft connected to the roller and a sticking member, for sticking to a workpiece, fixedly connected to the main body.

4. The miter saw of claim 3 , wherein, when a distance of a center of the roller from the worktable plane is less than or equal to a quarter of a diameter of the circular saw blade, the center of the roller is located at a lower edge of the main body, and a lowest end of an outer diameter of the roller is lower than the lower edge of the main body.

5. The miter saw of claim 4 , wherein in the front-and-rear orientation, the lower edge of the main body comprises a lowest point C and a highest point D and the distance between the center of the roller and the worktable plane is less than or equal to a distance between the highest point D and the worktable plane.

6. The miter saw of claim 5 , wherein the guiding portion comprises a highest point A and a lowest point B in a vertical orientation and the center of the roller is higher than the highest point A.

7. The miter saw of claim 6 , wherein, in response to a distance between the center of the roller and the highest point A being greater than or equal to ⅛ of the outer diameter of the roller and less than or equal to a half of the outer diameter of the roller, the center of the roller is located at the lower edge of the main body, a lowest point of the outer diameter of the roller is higher than the lowest point D, and the distance between the roller and the worktable plane is less than or equal to a quarter of the diameter of the circular saw blade.

8. The miter saw of claim 1 , wherein the cutting head further comprises a fixed shield at least partially surrounding the circular saw blade and a movable shield that is movably connected to the fixed shield and that at least partially surrounds the circular saw blade.

9. The miter saw of claim 8 , wherein the guiding portion is formed on the movable shield and is provided with a slope deviating from a direction perpendicular to the worktable plane.

10. The miter saw of claim 8 , wherein the fixed shield and the first guiding member constitute a chip discharging channel at least partially configured for discharging the chips.

11. The miter saw of claim 10 , wherein the chip discharging channel is further connected to or formed with a dust collecting hood configured for discharging the chips.

12. The miter saw of claim 11 , wherein the dust collecting hood is formed with or connected to a filter screen operative to filter the chips.

13. The miter saw of claim 1 , wherein the worktable is formed with a channel and the channel defines a chip outlet at the fence that allows the chips to be discharged.

14. The miter saw of claim 13 , wherein the worktable is formed with a receiving space at a lower side of the channel that is configured for receiving at least part of the chips.

15. The miter saw of claim 14 , wherein a second guiding member is connected or formed in the receiving space and is configured for guiding the chips to be discharged out of the chip outlet.

16. The miter saw of claim 1 , wherein the miter saw is further formed with a dust collecting channel operative to collect dust, the dust collecting channel is provided with a dust collecting hood operative to collect the dust, the cutting head further comprises a centrifugal fan connected to a motor shaft of the motor, the cutting head has a limit state when rotating around the second axis approaching the worktable, and, when the cutting head is at the limit state and an axis passing through a center point of the cutting piece and perpendicular to the worktable plane defines a reference axis, an included angle formed between a line connecting a center of the centrifugal fan to the center point of the cutting piece and the reference axis is greater than or equal to 0° and less than or equal to 45°.

17. The miter saw of claim 16 , wherein the included angle between the line connecting the center of the centrifugal fan to the center of the cutting piece and the reference axis is 30°.

18. The miter saw of claim 16 , wherein the dust collecting hood comprises a dust collecting inlet, a dust collecting outlet, and a first hood body and a second hood body, wherein the first hood body is coupled to the second hood body to form a receiving chamber and the centrifugal fan is received in the receiving chamber.

19. The miter saw of claim 1 , wherein the miter saw is further formed with a dust collecting channel operative to collect dust, the dust collecting channel is provided with a dust collecting hood operative to collect the dust, the cutting head further comprises a centrifugal fan connected to a motor shaft of the motor, the motor shaft is further connected to a motor fan configured for dissipating heat, the motor fan is away from the centrifugal fan, the cutting head has a limit state when rotating around the second axis approaching the worktable, and, when the cutting head is at the limit state and an axis passing through a center point of the cutting piece and perpendicular to the worktable plane defines a reference axis, an included angle formed between a line connecting a center of the centrifugal fan to the center point of the cutting piece and the reference axis is greater than or equal to 0° and less than or equal to 45°.

20. The miter saw of claim 19 , wherein the included angle between the line connecting the center of the centrifugal fan to the center of the cutting piece and the reference axis is 30°.

Assignees

• Nanjing Chervon Ind Co Ltd

Inventors

• Chen Zhifeng
• Ai Yinglu
• Ni Guigong

Classifications

• B23D59/006 Primary

  for removing or collecting chips · CPC title

• B27G5/02

  for sawing mitre joints; Mitre boxes (guide fences for timber in sawing machines B27B27/00) · CPC title

• B27B27/08

  arranged adjustably, not limited to only one of the groups B27B27/02 - B27B27/06 · CPC title

• B23D45/048

  the saw blade being adjustable according to angle of cut · CPC title

• B27B27/06

  arranged angularly with respect to the plane of the saw blade, e.g. for mitring {(devices for mitring wood B27G5/00)} · CPC title