Drilling machine, in particular hand-held core drilling machine
First Claim
1. A core drilling machine, comprising:
- a tool spindle for driving a tool;
a drive including a motor for driving said tool spindle, said drive including at least a first transmission stage and a second transmission stage;
a center mount provided on said tool spindle for mounting a pilot drill having a first outer diameter;
a tool mount provided on said tool spindle for mounting a core drill bit being substantially cup shaped and having an second outer diameter, wherein said center mount and said tool mount are arranged substantially concentrically with one another; and
a switching device interacting with said drive, said center mount and said tool mount;
wherein said switching device is configured for operating said drive selectively at least in a center drilling configuration or in a core drilling configuration, wherein, when being in said center drilling configuration, at least said pilot drill can be driven in said first transmission stage, and wherein, when being in said core drilling configuration, at least said core drill bit can be driven in said second transmission stage;
whereby said pilot drill can be driven at a first rotational speed range, and said core drill bit can be driven at a second rotational speed range different from said first rotational speed range; and
wherein a ratio between said second outer diameter of said core drill bit and said first outer diameter of said pilot drill is at least 2;
1.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention discloses a drilling machine, in particular a hand-held core drilling machine, having a drive with a motor that can be coupled to a tool spindle in order to drive the latter, wherein the drive allows at least a first transmission stage and a second transmission stage, having a center mount for mounting a pilot drill and having a tool mount for mounting a drill bit, wherein the drill bit and the pilot drill can be mounted substantially concentrically with one another, wherein the pilot drill, in particular in order to drill a pilot hole, can be driven in a first rotational speed range by means of the first transmission stage and wherein the drill bit, in particular in order to drill a core hole, can be driven in a second rotational speed range by means of the second transmission stage.
-
Citations
17 Claims
-
1. A core drilling machine, comprising:
-
a tool spindle for driving a tool; a drive including a motor for driving said tool spindle, said drive including at least a first transmission stage and a second transmission stage; a center mount provided on said tool spindle for mounting a pilot drill having a first outer diameter; a tool mount provided on said tool spindle for mounting a core drill bit being substantially cup shaped and having an second outer diameter, wherein said center mount and said tool mount are arranged substantially concentrically with one another; and a switching device interacting with said drive, said center mount and said tool mount; wherein said switching device is configured for operating said drive selectively at least in a center drilling configuration or in a core drilling configuration, wherein, when being in said center drilling configuration, at least said pilot drill can be driven in said first transmission stage, and wherein, when being in said core drilling configuration, at least said core drill bit can be driven in said second transmission stage; whereby said pilot drill can be driven at a first rotational speed range, and said core drill bit can be driven at a second rotational speed range different from said first rotational speed range; and wherein a ratio between said second outer diameter of said core drill bit and said first outer diameter of said pilot drill is at least 2;
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A core drilling machine, comprising:
-
a tool spindle for driving a tool; a drive including a motor for driving said tool spindle, said drive including at least a first transmission stage and a second transmission stage; a center mount provided on said tool spindle for mounting a pilot drill having a first outer diameter; a tool mount provided on said tool spindle for mounting a core drill bit being substantially cup shaped and having an second outer diameter; wherein said center mount and said tool mount are arranged substantially concentrically with one another; wherein said center mount is configured for coupling to said first transmission stage of said drive; wherein said tool mount is configured for coupling to said second transmission stage of said drive; whereby said pilot drill can be driven at a first rotational speed range, and said core drill bit can be driven at a second rotational speed range different from said first rotational speed range; wherein a ratio between said second outer diameter of said core drill bit and said first outer diameter of said pilot drill is at least 2;
1; anda switching device interacting with said drive and being configured for operating said drive selectively at least in a center drilling configuration or in a core drilling configuration, wherein, when being in said center drilling configuration, at least said pilot drill can be driven in said first transmission stage, and wherein, when being in said core drilling configuration, at least said core drill bit can be driven in said second transmission stage.
-
-
17. A core drilling machine, comprising:
-
a tool spindle for driving a tool; a drive including a motor for driving said tool spindle, said drive including at least a first transmission stage and a second transmission stage; a center mount provided on said tool spindle for mounting a pilot drill having a first outer diameter; a tool mount provided on said tool spindle for mounting a core drill bit being substantially cup shaped and having an second outer diameter; wherein said center mount and said tool mount are arranged substantially concentrically with one another; wherein said center mount is configured for coupling to said first transmission stage of said drive; wherein said tool mount is configured for coupling to said second transmission stage of said drive; whereby said pilot drill can be driven at a first rotational speed range, and said core drill bit can be driven at a second rotational speed range different from said first rotational speed range; wherein a ratio between said second outer diameter of said core drill bit and said first outer diameter of said pilot drill is at least 2;
1;wherein said drive further comprises a gear mechanism being connected between said motor and said tool spindle, and which provides a first transmission ratio in said first transmission stage, and a second transmission ratio in said second transmission stage; and wherein said gear mechanism has at least a first output and a second output, which outputs can be coupled selectively to said tool spindle in order to be driven in rotation, wherein said first output is assigned to said first transmission stage and wherein said second output is assigned to said second transmission stage.
-
Specification