Press driven by an electric motor through reduction gearing
First Claim
Patent Images
1. A press comprising:
- a press ram;
a press frame provided with an elongate ram drive housing having a forward end, a rear end and opposed side walls extending between said ends longitudinally of the housing;
a pedestal supporting the housing;
a base projecting forwardly from the pedestal and into alignment with the press ram; and
guide tracks on the forward end of the housing receiving and slideably guiding the press ram for reciprocating motion along a rectilinear path of movement towards and away from said base;
reduction gearing means mounted between the side walls of the housing rearwardly of the ram and having an output shaft, the reduction gearing means being driveable to cause the output shaft thereof to rotate about is own axis;
an eccentric assembly having a drive shaft projecting from the output shaft of the reduction gearing means eccentrically with respect to the axis of rotation of the output shaft and being connected to the ram for driving it towards and away from said base during each revolution of the output shaft and for concurrent movement of the drive shaft transversely of the path of movement of the ram; and
a brushless synchronous electric motor mounted between the side walls of the housing rearwardly of, and adjacent to, the reduction gearing means and in alignment therewith and having an output shaft drivingly connected to the reduction gearing means to drive it, the output shafts of the motor and of the reduction gearing means having a common axis of rotation extending rectilinearly between the side walls of the housing, the motor comprising circuit means for controlling the speed of the motor to stop the ram at least proximate to a home position thereof remote from said base during the reciprocating movement of the ram, in accordance with a motor speed program stored in said circuit means.
2 Assignments
0 Petitions
Accused Products
Abstract
The press (2) comprises a housing (4) in the forward part of which a slide ram (22) is mounted on bearings (62). The ram (22) is driven by an electric motor (26) by way of reduction gear box (24), having an output shaft (79) to which is eccentrically mounted a stub shaft (78) surrounded by a roller bearing ring (80) in a bearing block roller (82). As the output shaft (79) is rotated by the motor (26), the roller (82) rolls back and forth along a guideway (74) formed in the rear face of the ram (22), to take up the eccentricity of the shaft (78). The ram (22) is centrally mounted in its bearings (62) to avoid its canting as it is driven.
29 Citations
12 Claims
-
1. A press comprising:
-
a press ram; a press frame provided with an elongate ram drive housing having a forward end, a rear end and opposed side walls extending between said ends longitudinally of the housing;
a pedestal supporting the housing;
a base projecting forwardly from the pedestal and into alignment with the press ram; and
guide tracks on the forward end of the housing receiving and slideably guiding the press ram for reciprocating motion along a rectilinear path of movement towards and away from said base;reduction gearing means mounted between the side walls of the housing rearwardly of the ram and having an output shaft, the reduction gearing means being driveable to cause the output shaft thereof to rotate about is own axis; an eccentric assembly having a drive shaft projecting from the output shaft of the reduction gearing means eccentrically with respect to the axis of rotation of the output shaft and being connected to the ram for driving it towards and away from said base during each revolution of the output shaft and for concurrent movement of the drive shaft transversely of the path of movement of the ram; and a brushless synchronous electric motor mounted between the side walls of the housing rearwardly of, and adjacent to, the reduction gearing means and in alignment therewith and having an output shaft drivingly connected to the reduction gearing means to drive it, the output shafts of the motor and of the reduction gearing means having a common axis of rotation extending rectilinearly between the side walls of the housing, the motor comprising circuit means for controlling the speed of the motor to stop the ram at least proximate to a home position thereof remote from said base during the reciprocating movement of the ram, in accordance with a motor speed program stored in said circuit means. - View Dependent Claims (2, 3, 4)
-
-
5. A press for operating an electrical terminal applicator, the press comprising;
-
a press ram; a press frame provided with an elongate ram drive housing a forward end, a rear end and opposed side walls extending between said ends longitudinally of the housing;
a pedestal supporting the housing;
a base projecting forwardly from the pedestal and having means aligned with a press ram, for supporting an electrical applicator; and
guide tracks on said forward end of the housing receiving and slideably guiding the ram for reciprocating motion along a rectilinear path of movement towards and away from an applicator supporting means;reduction gearing means mounted between the side walls of the housing rearwardly of the ram and having an output shaft, the reduction gearing means being driveable to cause the output shaft thereof rotate about is own axis; an eccentric assembly having drive shaft projecting from the output shaft of the reduction gearing means eccentrically with respect to the axis of rotation of said output shaft and being connected to the ram for driving it towards and away from the applicator support during a revolution of said output shaft and for concurrent movement of the drive shaft transversely of the path of movement of the ram; a synchronous DC electric motor mounted between the side walls of the housing rearwardly of, and adjacent to, the reduction gearing means and having an output shaft drivingly connected to the reduction gearing means to drive its encoding means connected to the output shaft of the motor for producing a first output representing the angular position of the drive shaft of the eccentric assembly, and measuring means for producing a second output representing the speed of the output shaft of the motor; and electronic circuit means connected to said encoding means, said measuring means, and to said motor, for controlling the speed thereof according to a desired motor speed program stored in said circuit means. - View Dependent Claims (6, 7)
-
-
8. A press comprising;
-
a press ram; a press frame supporting the ram for reciprocating movement through a working and a return stroke; a direct current phased pulse-fed, synchronous electric motor on the press frame, the motor having an output shaft for driving the ram through said working and return strokes; reduction gearing means connecting the output shaft of the motor to the ram, whereby the ram is driven through a working stroke and a consecutive return stroke during a predetermined number of revolutions of the output shaft of the motor; incremental encoding means on the output shaft of the motor for producing a first electrical output representing the position of the ram along the path of movement thereof; measuring means on the motor for producing a continuous second electrical output representing the speed of the motor; and electronic circuit means for storing a desired motor speed program and being connected to the encoding means, to the measuring means, and to the motor, for comparing said first and second outputs with said program and for producing a third output for stopping the motor substantially upon the completion of each return stroke of the ram. - View Dependent Claims (9, 10, 11, 12)
-
Specification