Coupling device

A coupling device, in combination with first aid second coupling members, for coaxially coupling the first coupling member to the second coupling member, said device including a tension rod having an axially-extending tension rod head of circular cross-section and an elongated tension rod shaft extending axially therefrom, said tension rod insertable within an axially oriented channel of circular cross-section and said first coupling member and releasably maintainable within said channel by clamping elements engaging said tension rod head, said clamping elements being within said first coupling member for engaging said tension rod head and clamping said tension rod to said first coupling member, said tension rod shaft having a tension rod shaft coupling means for coupling the tension rod shaft to a shaft end piece, a shaft end piece connectable with said coupling means and having an end portion diameter greater than the tension rod shaft diameter, said shaft end piece comprising a separate stopper element connected to said coupling means of said tension rod shaft, said tension rod shaft extending through a passage borehole within said second coupling member, said passage borehole having a first passage borehole section with a diameter greater than the tension rod shaft diameter to provide a radial clearance between said tension rod shaft and said first passage borehole section, said first passage borehole diameter being less than said end portion diameter, wherein said passage borehole is radially expanded and extends axially to a free end of said second coupling member which defines a second passage borehole section, wherein said first and second passage borehole sections define an annular shoulder said end portion of said shaft end piece having a contact surface engaging said annular shoulder to couple said second coupling member to said first coupling member, wherein said second passage borehole section is noncircular in the circumferential direction and wherein said stopper element includes a stopper head correspondingly noncircular to provide a substantially twist-proof coupling between said stopper element and said second coupling member.

A coupling device, in combination with first and second coupling members, for coaxially coupling the first coupling member to the second coupling member, said device including a tension rod having an axially-extending tension rod head of circular cross-section and an elongated tension rod shaft extending axially therefrom, said tension rod insertable within an axially oriented channel of circular cross-section and said first coupling, and releasably maintainable within said channel by clamping elements engaging said tension rod head;

• said clamping elements being within said first coupling member for engaging said tension rod head and clamping said tension rod to said first coupling member, said tension rod shaft having a tension rod shaft coupling means for coupling the tension rod shaft to a shaft end piece, a shaft end piece connectable with said coupling means and having an end portion diameter greater than the tension rod shaft diameter, said shaft end piece comprising a separate stopper element connected to said coupling means of said tension rod shaft, said tension rod shaft extending through a passage borehole within said second coupling member, said passage borehole having a first passage borehole section with a diameter greater than the tension rod shaft diameter to provide a radial clearance between said tension rod shaft and said first passage borehole section, said first passage borehole diameter being less than said end portion diameter, wherein said passage borehole is radially expanded and extends axially to a free end of said second coupling member which defines a second passage borehole section, wherein said first and second passage borehole sections define an annular shoulder, said end portion of said shaft end piece having a contact surface engaging said annular shoulder to couple said second coupling member to said first coupling member, wherein said stopper element has a contoured periphery for preventing turning action inside the second coupling member, said stopper element movable within the second coupling member and having an axial contact surface used to engage and swivel to the second coupling member without generating a counteracting moment of flexion, said stopper element has a noncircular periphery received in a correspondingly noncircular boring of the second coupling member with a radial clearance.

A coupling device, in combination with first and second coupling members, for coaxially coupling the first coupling member to the second coupling member, said device including a tension rod having an axially-extending tension rod head of circular cross-section and an elongated tension rod shaft extending axially therefrom, said tension rod shaft having a tension rod shalt diameter which is less then a cross-sectional diameter of said tension rod head, said tension rod insertable within an axially oriented channel of circular cross-section and said first coupling member, and releasably maintainable within said channel by clamping elements engaging said tension rod head;

• said clamping elements being within said first coupling member for engaging said tension rod head and clamping said tension rod to said first coupling member, said tension rod shaft having a tension rod shaft coupling means for coupling the tension rod shaft to a shaft end piece, a shaft end piece connectable with said coupling means and having an end portion diameter greater than the tension rod shalt diameter, said tension rod shaft extending through a passage borehole within said second coupling member, said passage borehole having a first passage borehole section with a diameter greater than the tension rod shaft diameter to provide a radial clearance between said tension rod shaft and said first passage borehole section, said first passage borehole diameter being less than the said end portion diameter, wherein said passage borehole is radially expanded and extends axially to a free end of said second coupling member which defines a second passage borehole section, wherein said first and second passage borehole sections define an annular shoulder, said end portion of said shaft end piece having a contact surface engaging said annular shoulder to couple said second coupling member to said first coupling member, and wherein the tension rod shaft is surrounded by a sleeve which may be coupled nonrotably to the second coupling member and which is adapted to be gripped by a gripper of a tool magazine.