Tool for setting blind rivets
AssigneeGesipa Blindniettechnik GmbH
InventorLothar Wille
Life of this patent
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Abstract
A power tool for the setting of blind rivets has a reversible electric motor which can reciprocate a gripper for the mandrel of a blind rivet through a transmission employing a rotary nut driven by the motor and a spindle which reciprocates the gripper in response to rotation of the nut. The motor is permanently connected with the spindle, and hence with the gripper, and the ratio of the transmission including the nut and the spindle is not dependent upon the position of the gripper. Such construction enhances the comfort to the operator of the power tool. The electric circuit for the motor is designed in such a way that the motor is disconnected from a portable energy source and is braked prior to a reversal in the direction of rotation of its output element.
Claims21
A power tool for setting blind rivets by tensioning a mandrel of a blind rivet until the mandrel becomes severed, comprising a housing;
- a mandrel pulling unit disposed in said housing and comprising a gripper movable between an extended position for engagement with a mandrel and a retracted position to sever an engaged mandrel during movement from said extended position;
- and means for moving said gripper including an electric motor and a transmission interposed between said gripper and said motor within said housing, the electric motor being reversible and the transmission being permanently operatively coupled directly between the electric motor and the gripper such that the movement of the gripper in a first axial direction occurs without the use of a restoring spring when the electric motor rotates in a first direction and the movement of the gripper in an opposite second axial direction occurs without the use of a restoring spring when the electric motor rotates in an opposite second direction.
A power tool for setting blind rivets by tensioning a mandrel of a blind rivet until the mandrel becomes severed, comprising a housing;
- a mandrel pulling unit disposed in said housing and comprising a gripper movable between an extended position for engagement with a mandrel and a retracted position to sever an engaged mandrel during movement from said extended position;
- and means for moving said gripper including an electric motor and a transmission interposed between said gripper and said motor, the electric motor being reversible and the transmission being permanently operatively coupled directly between the electric motor and the gripper such that the movement of the gripper in a first axial direction occurs without the use of a restoring spring when the electric motor rotates in a first direction and the movement of the gripper in an opposite second axial direction occurs without the use of a restoring spring when the electric motor rotates in an opposite second direction;
- means for operating said motor, said motor and said transmission constituting the only means for moving the gripper between said positions thereof;
- a spindle member, a nut member mating with said spindle member and antifriction rolling elements interposed between said members, one of said members being rotatable by said motor and the other of said members being reciprocable with said gripper;
- a hollow mouthpiece provided in said housing and aligned with said gripper, and a thrust bearing between said mouthpiece and said nut member, said mouthpiece defining an inlet for introduction of a mandrel into said gripper;
- and
- wherein said nut member has a first axial end and a second axial end, said mouthpiece being disposed at one axial end of said nut member, said housing comprising a cage at least partially confining said nut member and further comprising a second thrust bearing between said cage and the other axial end of said nut member.
A power tool for setting blind rivets by tensioning a mandrel of a blind rivet until the mandrel becomes severed, comprising a housing;
- a mandrel pulling unit disposed in said housing and comprising a gripper movable between an extended position for engagement with a mandrel and a retracted position to sever an engaged mandrel during movement from said extended position;
- and means for moving said gripper including an electric motor and a transmission interposed between said gripper and said motor;
- further comprising means for operating said motor, said motor and said transmission constituting the only means for moving the gripper between said positions thereof;
- wherein said motor is reversible and said operating means includes an on/off switch actuatable by an operator and a circuit including means for operating said motor in a first direction in response to actuation of said switch and in a second direction in response to termination of actuation of said switch.
Dependencies are inferred from the claim text.