Dust collection cover for cutting devices

Patent metadata

Field	Value
Publication number	US-9937638-B2
Application number	US-201615176468-A
Country	US
Kind code	B2
Filing date	Jun 8, 2016
Priority date	Jun 18, 2015
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A compression spring is retained in a spring retaining portion provided in a fixing cover. By a pressing portion formed in a main body cover, the compression spring can be pressed to generate a biasing force in an opening direction of the main body cover. The compression spring is retained in the spring retaining portion. Accordingly, the fixing cover and main body cover can be easily assembled.

First claim

What is claimed is:

1. A dust collection cover for a cutting device, the dust collection cover being configured to cover around a rotary cutting blade of the cutting device, the dust collection cover comprising:
a first cover configured to be attached to the cutting device; and
a second cover having a base with which a cutting surface of a material to be cut is brought into contact, wherein:
the first cover is coupled to the second cover in a front part of the dust collection cover, such that the first cover is relatively opened and closed with respect to the second cover around a rotation support shaft;
the second cover is biased toward an opening direction by a compression spring so as to be opened with respect to the first cover;
the compression spring is retained so as to be expanded and contracted along an arc centered on the rotation support shaft, the compression spring being retained in a spring retaining portion provided in the second cover;
the spring retaining portion includes a removal prevention portion for preventing removal of the compression spring; and
a pressing portion is provided in the first cover to generate a biasing force to the compression spring, and the pressing portion is entered within the spring retaining portion through a pressing portion entering path provided in the removal prevention portion of the spring retaining portion such that the pressing portion presses one end of the compression spring.

2. The dust collection cover according to claim 1 , wherein,
when the dust collection cover is attached to the cutting device, the compression spring is retained opposite to the rotation support shaft with respect to a rotation center of the rotary cutting blade.

3. The dust collection cover according to claim 1 , wherein,
when the dust collection cover is attached to the cutting device, the compression spring is retained opposite to the cutting device with respect to the rotary cutting blade in a thickness direction of the rotary cutting blade.

4. The dust collection cover according to claim 1 , wherein,
a cutting depth adjustment stopper is provided between the first cover and the second cover such that an opening and closing angle in a closing direction of the first cover with respect to the second cover is configured to be positioned at a plurality of positions to adjust a cutting depth of the rotary cutting blade with respect to the cutting surface of the material to be cut.

5. The dust collection cover according to claim 1 , wherein,
a fixing stopper for locking a rotation of the first cover with respect to the second cover at an arbitrary position is provided between the first cover and the second cover.

6. A cutting device having the dust collection cover according to claim 1 .

Assignees

• Makita Corp

Inventors

• Numata Fumitoshi

Classifications

• B23D59/006

  for removing or collecting chips · CPC title

• B28D7/02 Primary

  for removing or laying dust, e.g. by spraying liquids; for cooling work · CPC title

• B28D1/045

  Sawing grooves in walls; sawing stones from rocks; sawing machines movable on the stones to be cut · CPC title

• B23D45/16

  Hand-held sawing devices with circular saw blades · CPC title

• B27B9/02

  Arrangements for adjusting the cutting depth or the amount of tilting · CPC title