Actuation Pedal Stop Bar Adjustment for Faster Assembly
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Solution Overview
Problem
The assembly of actuation pedals for vehicles is time-consuming and requires significant manual effort due to the need for precise adjustment of components to ensure reliable function and prevent excessive clearance, which is often achieved through labor-intensive length adjustments of the push rod.
Innovation Solution
Incorporating an adjustable stop bar with a fixation feature that allows for varying the feature position to set a specified axial clearance between components, eliminating the need for push rod length adjustments, thereby simplifying the assembly process and reducing manual effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the push rod length is adjusted to ensure reliable function and prevent excessive clearance, then the reliability and function of the actuation pedal are improved, but the assembly time and manual effort increase significantly
Solution Approach 1:
The invention extracts the adjustment function from the push rod itself and relocates it to the stop bar. By removing the need to adjust the push rod length, the time-consuming adjustment process is eliminated while the reliability function is preserved through the adjustable stop bar that sets the initial position of the pedal lever.
Solution Approach 2:
The stop bar serves as an intermediary element that mediates between the pedal lever and the housing. Instead of directly adjusting the push rod length, the stop bar indirectly controls the initial position of the pedal lever through its adjustable feature position, thereby achieving the same reliability effect with less effort.
2Manufacturing precision
If the push rod length is adjusted to minimize clearance between components, then the manufacturing precision and actuation reliability are improved, but the ease of manufacture and assembly are worsened
Solution Approach 1:
The invention introduces dynamics to the stop bar by making its feature position adjustable. This allows the stop bar to be positioned at different locations along the bar axis, enabling precise control of the pedal lever's initial position and the resulting axial clearance, while simplifying the assembly process through rotational adjustment rather than complex push rod length modification.
Solution Approach 2:
The invention changes the parameter being adjusted from push rod length to stop bar feature position. By varying the position of the stop feature along the bar axis through rotational adjustment of the stop bar, the axial clearance between components is precisely controlled while the ease of manufacture is improved through a simpler adjustment mechanism.
3Reliability
If the initial position of the pedal lever is precisely set to ensure reliable actuation, then the function and reliability are improved, but the device complexity and adjustment time increase
Solution Approach 1:
The stop bar serves multiple functions: it limits the lever rotation, defines the initial position of the pedal lever, and provides an adjustable feature position for precise control. This multi-functionality consolidates several adjustment needs into a single component, reducing overall device complexity while maintaining reliable actuation.
Solution Approach 2:
The stop bar is pre-adjusted to the desired feature position before final assembly. This preliminary action allows the initial position of the pedal lever to be precisely set in advance, ensuring reliable actuation without requiring complex adjustments after assembly is complete.
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 approach enables precise and reliable setting of the initial position of the pedal lever with minimal manual effort, ensuring a specified axial clearance, thus improving the assembly efficiency and reliability of the actuation pedal.
Implementation Method 1
the stop bar comprises a stop feature, which is adapted to interfere with a lever hook fixed to the pedal lever, the stop feature having a feature position and defining an end stop of the lever rotation at the feature position
Implementation Method 2
A pedal lever particularly makes use of a leverage effect when transforming the mechanical actuation signal into the actuation translation
Implementation Method 3
the push rod is adapted to transform the lever rotation into an actuation translation for a piston
Implementation Method 4
the piston is adapted to build up a pressure on a pneumatic medium or a hydraulic medium upon receiving the actuation translation
Implementation Method 5
the piston is adapted to build up a pressure on a pneumatic medium or a hydraulic medium upon receiving the actuation translation
Data Source
Figure 1
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Figure 5
AI summary
The invention relates to an actuation pedal (100) comprising a pedal lever (140) rotatable in a housing (110); a stop bar (180), which is detachably fixed to the housing (110) and arranged to limit the lever rotation (RL) of the pedal lever (140), the stop bar (180) comprising a stop feature (182) adapted to interfere with a lever hook (142) fixed to the pedal lever (140), defining an end stop (SE) of the lever rotation (RL); a push rod (160), arranged to contact the pedal lever (140) on a pedal end (162) and a piston (120) on an opposing piston end (164), wherein the push rod (160) is adapted to transform the lever rotation (RL) into an actuation translation (TA) for a piston (120), wherein the piston (120) is adapted to build up a pressure (P) on a medium (122, 124) upon receiving the actuation translation (TA).