초록 ▼

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 hold

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.

대표청구항 ▼

What is claimed is: 1. 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 w

What is claimed is: 1. 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. 2. Pressing device of claim 1, wherein the working piston is moved into a holding position upon actuation of the actuating switch and is moved into a pressing position upon renewed actuation of the actuating switch. 3. Pressing device of claim 1, wherein after said jaw is moved against a workpiece, said first and second portions of the working piston are moved toward one another. 4. The pressing device of claim 1, wherein the pump is directly rearward of the piston head. 5. The pressing device of claim 1, wherein said jaw is linearly displaced. 6. The pressing device of claim 1, wherein said first portion of said piston is supported by a return spring. 7. The pressing device of claim 1, wherein said second portion of said piston is attached to said jaw. 8. 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. 9. Pressing device of claim 8, wherein the first and second portions of the working piston engage telescopically in one another. 10. The pressing device of claim 8, wherein upon continuous actuation of said actuating switch said working piston is moved to said pressing position. 11. 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. 12. Method of claim 11, wherein said holding position is effectuated by actuating the actuating switch to manually interrupt the pressing process. 13. Method of claim 11, wherein the holding position is effectuated by use of an electronic control to interrupt the pressing process. 14. The method of claim 11, wherein upon continuous actuation of said actuating switch said holding position is skipped. 15. 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. 16. The device of claim 15, wherein displacement of said second portion of said working piston is transferred to said jaw. 17. The device of claim 16, wherein the second portion of said working piston is attached to said jaw. 18. The method of claim 16, wherein said step of deactivating is manually performed. 19. The method of claim 16, wherein said step of deactivating said motor further includes electronically sensing said sufficient compression of said compression spring and providing a signal to said motor to deactivate said motor. 20. The method of claim 16, wherein upon continuous actuation of said actuating switch the step of deactivating said motor is skipped. 21. The method of claim 16, wherein said step of providing further includes providing a piston return spring and a by pass valve and further including the step of opening said by pass valve after said pressing position is reached to allow said piston return spring to move said piston rearward. 22. The device of claim 15, wherein said working piston is moved to a holding position upon actuation of said actuating switch and is moved into a pressing position upon renewed actuation of said actuating switch. 23. 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.