Electrohydraulic pressing device and method for operating the same
AssigneeGustav Klauke GmbH
InventorEgbert Frenken
Life of this patent
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Abstract
The invention relates to an electrohydraulic pressing device (1) that can be operated using one hand. The device comprises a working head (30), an electric motor (4), a pump (20), a hydraulic reservoir (33), and a gear mechanism (19) extending between the electric motor (4) and the pump (20). A holding area (5) around which a hand is placed is provided and an actuating switch (39) is assigned to this area. The aim of the invention is to improve a pressing device of this type with regard to the handling thereof. To this end, the invention provides that the holding area (5) is formed around the electric motor (4), and the actuating switch (39) is situated between the electric motor (4) and the working head.
Claims23
Electrohydraulic pressing device comprising:
- a housing;
- a working head attached to said housing, said working head including a jaw and a working piston;
- an electric motor within said housing;
- a pump within said housing;
- a hydraulic tank within said housing;
- a gear mechanism within said housing and provided between the electric motor and the pump;
- a portion of said housing forming a gripping region with which an actuating switch is associated;
- and
- said working piston including a first portion having piston head, a second portion and a spring, said spring biasing said first and second portions in a moved apart position, wherein a rearward most end of said second portion is positioned forward of a rearward most end of said first portion and wherein displacement of said second portion of said working piston is transferred to said jaw.
An electrohydraulic pressing device comprising:
- a housing;
- a working head attached to said housing, said working head including a jaw and a working piston;
- an electric motor within said housing;
- a pump within said housing;
- a hydraulic tank within said housing;
- a gear mechanism within said housing and provided between the electric motor and the pump;
- a portion of said housing forming a gripping region associated with an actuating switch;
- a working piston including a first portion having a piston head, a second portion and a spring, wherein a rearward most end of said second portion is positioned forward of a rearward most end of said first portion, wherein the first and second portions of the working piston are biased by said spring into a position in which they are moved apart from one another;
- and
- wherein actuation of said actuating switch results in movement of said working piston to a holding position or to a pressing position.
Method for operating an electrohydraulic pressing device comprising the steps of:
- providing an electrohydraulic pressing device comprising;
- a housing, a working head attached to said housing, an electric motor within said housing, a pump driven by said electric motor, a hydraulic tank, a gear mechanism between the electric motor and the pump, a gripping region provided by a portion of said housing and with which an actuating switch is associated, and a working piston;
- actuating said actuating switch to activate said electric motor and move the working piston into a holding position, wherein the force acting on the workpiece in said holding position is substantially less than a maximum pressing force and wherein the working piston is stationary;
- moving the working piston from the holding position to a pressing position by renewed operation of the actuating switch.
Electrohydraulic pressing device comprising:
- a housing;
- a working head attached to said housing, said working head including a jaw and a working piston;
- wherein said working piston includes a first portion having piston head, a second portion and a spring, said spring biasing said first and second portions such that a forward most end of said second portion is moved away from a rearward most end of said first portion;
- an electric motor within said housing;
- a pump within said housing;
- a hydraulic tank within said housing;
- a gear mechanism within said housing and provided between the electric motor and the pump;
- and
- a portion of said housing forming a gripping region with which an actuating switch is associated.
Method for operating an electrohydraulic pressing device comprising the steps of:
- providing an electrohydraulic pressing device comprising;
- a housing, a working head attached to said housing, an electric motor within said housing, a pump driven by said electric motor, a hydraulic tank, a gear mechanism between the electric motor and the pump, a gripping region provided by a portion of said housing and with which an actuating switch is associated, and a working piston having a first portion, a second portion, and a spring biasing said first and second portions into a moved apart position;
- actuating said actuating switch to activate said electric motor and move the working piston forward to contact a workpiece and to compress said compression spring;
- upon sufficient compression of said compression spring, deactivating said motor to maintain said piston in a holding position;
- and
- actuating said actuating switch to activate said electric motor and move the working piston to pressing position.
Dependencies are inferred from the claim text.