| 摘要 |
The present invention relates to a dust controlling device (100) for rock drilling consisting of an elastic sheet structure (101) comprising an upper (102) and a lower (104)surface and a circular hole (106) adapted for being penetrated by a drill bit (130) of a rock drill (116), the circular hole (106) having an edge (110), wherein a plurality resilient tongues (120, 120a-c) is projecting from the edge (110) of the circular hole (106), each tongue of the plurality of resilient tongues (120, 120a-c) having an upper (126) and a lower (125) surface and a outer edge (105), the plurality of resilient tongues(120, 120a-c)comprising at least one resilient tongue (120a) located in a first plane and at least one resilient tongue (120b) located in a second plane, the first and second plane being parallel to each other, wherein a part of the lower surface of a tongue (120a) located in the first plane is in abutment with a part of the upper surface of a tongue (120b) located in the second plane, wherein each tongue of the plurality resilient tongues (120, 120a-c) is at least three times thinner compared to the elastic sheet structure, wherein each tongue (120) projects toward a center (122) of the circular hole (106) in such a way that the outer edges (105) of said resilient tongues (120, 120a-c) together defines an opening (108) conforming to a substantially circular shape, the opening (108) adapted for accommodating a stem (118) of the rock drill (116). |
