Actuating Device for Pivotable Arm Positioning
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Solution Overview
Problem
Existing actuating devices for pivotable arms in metalworking processes, such as those in the vehicle body construction industry, face challenges in achieving precise, constant, and repeatable positioning due to inaccessible adjustment means and unreliable fastening mechanisms that yield under high forces.
Innovation Solution
The actuating device incorporates mechanical coupling means that transform a rotary control movement into a relative displacement between two parts of the actuating means along the piston axis, allowing for stepless adjustment of the pivotable arm's position and maintaining it reliably over time, even without an actuation force, using threaded surfaces and rotary elements accessible from the lateral side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If adjusting means are positioned at the bottom face of the device, then the device structure is compact, but the adjustment becomes inaccessible and difficult to perform
Solution Approach 1:
The adjusting means are repositioned from the bottom face to the lateral face of the device, changing the spatial dimension of accessibility. This allows operators to access adjustment controls from the side rather than from below, resolving the contradiction between compact structure and ease of operation.
2Measurement precision
If discrete adjustment positions are used through through holes, then the adjustment positions are clearly defined, but only discrete angular positions can be achieved
Solution Approach 1:
The mechanical system of discrete through-holes and positioning pins is replaced with a threaded rod and rotating element mechanism. This substitution transforms the adjustment from discrete positional steps to continuous rotational movement, enabling stepless adjustment while maintaining precise positioning capability.
3Ease of operation
If headless screws are used to block sliding, then the adjustment is easily accessible, but the fastening is not reliable under high forces
Solution Approach 1:
The headless screw blocking mechanism is replaced with a threaded rod and rotating element fastening system. The threaded connection provides reliable mechanical engagement capable of withstanding high forces while maintaining accessibility for adjustment through the lateral face of the device.
4Stability of the object's composition
If the pivotable arm position is fixed through initial adjustment, then the non-operating position is set, but the adjustment cannot be modified later
Solution Approach 1:
The adjustment system transitions from a static initial setting to a dynamic, continuously adjustable mechanism. The threaded rod with rotating element allows the non-operating position to be modified at any time while maintaining stable positioning when adjusted, enabling both stability and adaptability.
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 solution enables continuous, precise, and repeatable adjustment of the pivotable arm's position, ensuring long-lasting stability and easy accessibility, as the rotary elements are not subjected to wear and can be adjusted without reversing the arm's position once set.
Implementation Method 1
The adjusting means (20) comprise mechanical coupling means (21a, 21b, 22) acting on the first part (12a) of the actuating means in order to transform a rotary control movement imparted on said coupling means about a second rotary axis (C) transversal to the piston axis (A), into a relative displacement between the first and the second part (12a, 12b) of the piston actuating means along the piston axis (A)
Data Source
AI summary
An actuating device of the articulated lever or cam type having a body coupled to a sliding control piston, the piston coupled to an actuator movable along a piston axis and operatively coupled to a pivotable arm to pivot it about a first rotational axis upon a sliding movement of the actuator. The actuator has two relatively displaceable parts and one or more rotary elements having at least one mechanical coupling that acts on the first part of the actuator to transform a rotary control movement imparted on the at least one mechanical coupling about a second rotational axis transverse to the piston axis, into a relative displacement between the first part and the second part of the actuator along the piston axis to modify the length of the actuator.