Securing mechanism for securing a drive shaft of a rotating tool member of a working tool

A securing mechanism for securing a drive shaft of a rotating tool member of a working tool against rotation, said securing mechanism comprising:

• a securing member fixedly connected to the drive shaft, said securing member having at least one engagement opening;
• a lock bolt for engaging said at least one engagement opening;
• said lock bolt axially displaceably positioned in a housing of the working tool;
• a spring for biasing said lock bolt into engagement with said at least one engagement opening;
• an actuating element for displacing said lock bolt from an engaged position, in which said lock bolt engages said at least one engagement opening, into a disengaged position, in which said lock bolt is removed from said engagement opening;
• said actuating element positioned adjacent to said lock bolt and comprising a cam member extending into a travel path of said lock bolt;
• said cam member having a securing position in which said cam member is locked at said housing and secures said lock bolt against the force of said spring in said disengaged position;
• said actuating element being a cylindrical turn knob comprising a head, positioned external to said housing, and an inner section, positioned inside said housing, wherein said cam member is connected to said inner section;
• said actuating element further comprising a guide section between said head and said inner section;
• said housing having a receiving opening;
• said guide section and said inner section received in said receiving opening;
• said guide section fitting without play in said receiving opening;
• and
• wherein said turn knob comprises a rotational stop member and wherein said receiving opening comprises counter stops cooperating with said rotational stop member.

A securing mechanism for securing a drive shaft of a rotating tool member of a working tool against rotation, said securing mechanism comprising:

• a securing member fixedly connected to the drive shaft, said securing member having at least one engagement opening;
• a lock bolt for engaging said at least one engagement opening;
• said lock bolt axially displaceably positioned in a housing of the working tool;
• a spring for biasing said lock bolt into engagement with said at least one engagement opening;
• an actuating element for displacing said lock bolt from an engaged position, in which said lock bolt engages said at least one engagement opening, into a disengaged position, in which said lock bolt is removed from said engagement opening;
• said actuating element positioned adjacent to said lock bolt and comprises a cam member extending into a travel path of said lock bolt;
• said cam member having a securing position in which said cam member is locked at said housing and secures said lock bolt against the force of said spring in said disengaged position;
• said actuating element being a cylindrical turn knob comprising a head, positioned external to said housing, and an inner section, positioned inside said housing, wherein said cam member is connected to said inner section;
• and
• said head being a nut and having a size identical to the size of a clamping nut for clamping the tool member.