Tool shaft for a tool of the percussive and rotative type

In a device on a hand machine tool for transmitting torque to a percussion tool, a drilling tool, or a percussion and drilling tool having a tool shaft with an end engaged in a tool receptacle of said hand machine tool, in which at least two rotary driving grooves which open out at said end of said tool shaft and in which a plurality of strip-shaped rotary drivers of said tool receptacle engage in said rotary driving grooves and have respective assigned flanks, which are at least approximately planar, and in which at least one locking body is located in said tool receptacle and cooperate with two recesses in said tool shaft which are closed on both ends and are located diametrically opposite one another, said tool receptacle having a receptacle bore hole, the improvement wherein said rotary drivers assigned to said rotary driving grooves in said tool shaft are distributed around said receptacle bore hole circumferentially in such a way that two rotary drivers are never located diametrically opposite one another, at least one of said rotary driving grooves and at least one of said rotary drivers being located between said recesses which are closed at both of said ends, the number of said rotary driving grooves located between said two recesses on one side of said tool shaft being greater than the number of said rotary driving grooves located on the other side of said tool shaft.

In a device on a hand machine tool for transmitting torque to a percussion tool, a drilling tool, or a percussion and drilling tool having a tool shaft with an end engaged in a tool receptacle of said hand machine tool, in which at least two rotary driving grooves which open out at said end of said tool shaft and in which a plurality of strip-shaped rotary drivers of said tool receptacle engage in said rotary driving grooves and have respective assigned flanks, which are at least approximately planar, and in which at least one locking body is located in said tool receptacle and cooperate with two recesses in said tool shaft which are closed on both ends and are located diametrically opposite one another, said tool receptacle having a receptacle bore hole, the improvement wherein said rotary drives assigned to said rotary driving grooves in said tool shaft are distributed around said receptacle bore hole circumferentially in such a way that two rotary drivers are never located diametrically opposite one another, one of said rotary driving grooves in said tool shaft being deeper than the other ones of said rotary driving grooves and having a deeper groove bottom while said other rotary driving grooves have shallower groove bottoms and the respective strip-shaped rotary driver of said tool receptacle being constructed so as to be correspondingly higher than the other of said rotary drivers.

In a tool, especially for percussion operation, drilling operation and percussion and drilling operation for insertion into a bore hole of a tool receptacle of a percussion tool, a drilling tool, or a percussion and drilling tool, having at least two rotary driving grooves which open out at an end of a tool shaft inserted in said bore hole, said tool receptacle having a plurality of strip-shaped rotary drivers engaged in said rotary driving grooves provided with respective assigned flanks, which are at least approximately planar, and at least one locking body located in said tool receptacle, said bore hole having a wall and a bore hole axis, said strip-shaped rotary drivers extending parallel to said bore hole axis and are located on said wall of said bore hole, the improvement wherein said tool shaft has two recesses which are closed at both ends and located diametrically opposite one another, and at least one of said rotary driving grooves is located between said recesses which are closed at both ends, said drivers having surfaces which cooperate with said flanks of said rotary driving grooves, at least two of said flanks of said rotary driving grooves being circumferentially offset relative to said recesses by different angular distances, at least one of said rotary driving grooves for at least one of said rotary drivers being located between said recesses which are closed at both of said ends, the number of said rotary driving grooves located between said two recesses on one side of said tool shaft being greater than the number of said rotary driving grooves located on the other side of said tool shaft.

In a tool, especially for percussion operation, drilling operation and percussion and drilling operation for insertion into a bore hole of a tool receptacle of a percussion tool, a drilling tool, or a percussion and drilling tool, having at least two rotary driving grooves which open out at an end of a tool shaft inserted in said bore hole, said tool receptacle having a plurality of strip-shaped rotary drivers engaged in said rotary driving grooves provided with respective assigned flanks, which are at least approximately planar, and at least one locking body located in said tool receptacle, said bore hole having a wall and a bore hole axis, said strip-shaped rotary drivers extending parallel to said bore hole axis and are located on said wall of said bore hole, the improvement wherein said tool shaft has two recesses which are closed at both ends and located diametrically opposite one another, and at least one of said rotary driving grooves is located between said recesses which are closed at both ends, said drivers having surfaces which cooperate with said flanks of said rotary driving grooves, at least two of said flanks of said rotary driving grooves being circumferentially offset relative to said recesses by different angular distances, and at least one of said rotary driving grooves is located between said recesses which are closed at both ends, said rotary driving grooves being distributed circumferentially around said tool shaft so that one of said rotary driving grooves is never diametrically opposite another of said rotary driving grooves, each of said rotary driving grooves in said tool shaft having a different width from that of another of said rotary driving grooves.

In a tool, especially for percussion operation, drilling operation and percussion and drilling operation for insertion into a bore hole of a tool receptacle of a percussion tool, a drilling tool, or a percussion and drilling tool, having at least two rotary driving grooves which open out at an end of a tool shaft inserted in said bore hole, said tool receptacle having a plurality of strip-shaped rotary drivers engaged in said rotary driving grooves provided with respective assigned flanks, which are at least approximately planar, and at least one locking body located in said tool receptacle, said bore hole having a wall and a bore hole axis, said strip-shaped rotary drivers extending parallel to said bore hole axis and are located on said wall of said bore hole, the improvement wherein said tool shaft has two recesses which are closed at both ends and located diametrically opposite one another, and at least one of said rotary driving grooves is located between said recesses which are closed at both ends, said drivers having surfaces which cooperate with said flanks of said rotary driving grooves, at least two of said flanks of said rotary driving grooves being circumferentially offset relative to said recesses by different angular distances, and at least one of said rotary driving grooves is located between said recesses which are closed at both ends, said rotary driving grooves being distributed circumferentially around said tool shaft so that one of said rotary driving grooves is never diametrically opposite another of said rotary driving grooves, each of said rotary driving grooves in said tool shaft having a different depth from that of another of said rotary driving grooves.

In a tool, especially for percussion operation, drilling operation and percussion and drilling operation, for insertion into a bore hole of a tool receptacle of a percussion tool, a drilling tool, or a percussion and drilling tool, having at least two rotary driving grooves which open out at an end of a tool shaft inserted in said bore hole, said tool receptacle having a plurality of strip-shaped rotary drivers engaged in said rotary driving grooves provided with respective assigned flanks, which are at least approximately planar, and at least one locking body located in said tool receptacle, said bore hole having a wall and a bore hole axis, said strip-shaped rotary drivers extending parallel to said bore hole axis and are located on said wall of said bore hole, the improvement wherein said tool shaft has two recesses which are closed at both ends and located diametrically opposite one another, and at least one of said rotary driving grooves is located between said recesses which are closed at both ends, said drivers having surfaces which cooperate with said flanks of said rotary driving grooves, at least two of said flanks of said rotary driving grooves being circumferentially offset relative to said recesses by different angular distances, and at least one of said rotary driving grooves is located between said recesses which are closed at both ends, said rotary driving grooves being distributed circumferentially around said tool shaft so that one of said rotary driving grooves is never diametrically opposite another of said rotary driving grooves, one of said rotary driving grooves in said tool shaft being deeper than the other ones of said rotary driving grooves and having a deeper groove bottom while said other rotary driving grooves have shallower groove bottoms.