Press Machine Slide Drive Mechanism Simplification
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Solution Overview
Problem
Conventional press machines with multiple crankshafts for slide drive mechanisms become complex and large, complicating the configuration and increasing the moment of inertia of the drive system.
Innovation Solution
The implementation of a Scotch yoke mechanism allows the slide to be pressed with one crankshaft, simplifying and compacting the slide drive mechanism by eliminating the influence of connecting rod ratios, reducing the length of connecting parts, and minimizing the moment of inertia, while also incorporating multiple eccentric parts and yokes to enhance stability and reduce deflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a plurality of crankshafts are used for the slide drive mechanism, then the slide can be pressed at multiple points, but the configuration becomes complicated and large
Solution Approach 1:
The patent combines multiple crankshaft functions into a single crankshaft by providing multiple eccentric parts on one crankshaft. Each eccentric part can independently drive a yoke to press the slide at different points, eliminating the need for multiple separate crankshafts and their associated drive mechanisms.
Solution Approach 2:
The single crankshaft is designed with multi-functionality by incorporating multiple eccentric parts that can independently perform the pressing function at different locations. This universal design allows one component to replace multiple components while maintaining the multi-point pressing capability.
2Adaptability or versatility
If a plurality of crankshafts are used for the slide drive mechanism, then the slide can be pressed at multiple points, but the moment of inertia increases
Solution Approach 1:
By merging multiple crankshafts into one crankshaft with multiple eccentric parts, the total mass of the rotating components is reduced. This consolidation directly reduces the moment of inertia of the drive system while maintaining the capability to press at multiple points through the independent eccentric parts.
3Force
If connecting rods are used in the drive mechanism, then the slide can be pressed, but the inclination due to connecting rod ratio increases the vertical dimension
Solution Approach 1:
The patent extracts and eliminates the connecting rod from the drive mechanism, replacing it with a Scotch yoke mechanism. This removal eliminates the inclination issues and extra vertical space required by connecting rods, while the pressing force transmission is achieved through the eccentric part-yoke connection.
Solution Approach 2:
The patent substitutes the traditional connecting rod mechanism with a Scotch yoke mechanism. This mechanical substitution eliminates the need for long connecting rods and their associated inclination angles, thereby reducing the vertical dimension of the press machine while maintaining effective force transmission.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration simplifies the slide drive mechanism, reduces the size and moment of inertia of the press machine, and allows for more compact and stable operation, enabling efficient and compact design even when pressing at multiple points.
Implementation Method 1
a mechanism called Scotch yoke mechanism is employed to achieve a configuration in which a plurality of points are arranged on the slide in the longitudinal direction of the slide and in a direction perpendicular to the longitudinal direction and the slide is pressed with one crankshaft
Data Source
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AI summary
There is provided a press machine capable of simplifying a slide drive mechanism. The press machine comprises: a slide 16 supported so as to be reciprocally movable; a crankshaft 32 arranged along a longitudinal direction of the slide 16 and having a plurality of eccentric parts; a drive unit 36 configured to rotate the crankshaft 32; a plurality of yokes 34A and 34B each provided at each of the eccentric parts of the crankshaft 32 and configured to reciprocate, due to rotation of the crankshaft 32, along a moving direction of the slide 16; and a plurality of points 30A to 30D each connects each of the yokes 34A and 34B to the slide 16, wherein at least one of the yokes 34A and 34B is connected to the slide 16 via some of the plurality of the points 30A to 30D arranged along a direction perpendicular to an axial direction of the crankshaft 32.