Brake Pedal Adjustment Device Threaded Linkage

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Solution Overview

Problem

Existing adjustment devices for the release position of motorcycle brake operation elements, such as the rear brake pedal, are complex and expensive, failing to provide a simple and cost-effective method for adjusting the inclination to accommodate different user driving positions.

Innovation Solution

An adjustment device featuring an articulated rod with a threaded pin and a push rod connected to the brake operation means, allowing for variable angular adjustment of the brake operation element using a socket wrench, which is quick, precise, and inexpensive to manufacture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If motor means and gears are used to adjust the pedal inclination in stand-by position, then the release position can be adjusted, but the device becomes very complex and expensive

Engineering Contradiction:

Improveadjustability of release positionVSAvoidcomplexity of adjustment mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces the complex motorized mechanical system with a simple threaded adjustment mechanism. The threaded rod with adjustable nut allows direct mechanical adjustment of the pedal release position without requiring motors, gears, or complex actuating mechanisms. This substitution dramatically reduces device complexity while maintaining adjustability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention changes the adjustment parameter from angular inclination (requiring motorized mechanisms) to linear position along a threaded rod. By converting the adjustment parameter to a linear displacement that can be achieved through simple threading, the system achieves position adjustment without complex mechanical systems.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If motor means and gears are used to adjust the pedal inclination in stand-by position, then the release position can be adjusted, but the manufacturing cost becomes very high

Engineering Contradiction:

Improveadjustability of release positionVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent replaces expensive motorized systems with simple, inexpensive threaded adjustment components. The threaded rod, adjustable nut, and basic linkages are far cheaper to manufacture than motors and gear systems, directly reducing manufacturing costs while preserving the essential adjustability function.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention uses simple, easily replaceable threaded components instead of expensive motorized systems. These basic mechanical parts are inexpensive to manufacture and can be easily replaced if needed, making the overall system more cost-effective despite potentially lower durability compared to motorized systems.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Ease of manufacture

If a simple threaded adjustment mechanism is used, then the device is inexpensive and simple to manufacture, but rotation errors must be prevented to maintain calibration

Engineering Contradiction:

Improvemanufacturing costVSAvoidcalibration accuracy

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent introduces an intermediary locking mechanism (adjustable nut or locking component) that mediates between the threaded adjustment rod and the pedal linkage. This intermediary component prevents unintended rotation or movement, maintaining calibration accuracy while allowing controlled adjustment, thus resolving the conflict between simplicity and reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Enables quick, precise, and cost-effective adjustment of the brake operation element's release position, preventing rotation errors and maintaining calibration, while being resistant to dust and dirt, and can be applied to various brake types including disc and drum brakes.

Implementation Method 1

The push rod 40 comprises a threaded portion 48 at least partly screwed in said adjustment hole 32 of pin 29... rotating the threaded portion 48 relative to the adjustment hole 32, a shifting of pin 29 and thereby of the adjustment end 28 is actuated along the threaded portion 48

Methodology Applied

Scientific EffectScrew mechanism: Screw

Data Source

PatentEP2203333B1Adjustment device for a release position of an operation element of a brake of a vehicle and brake of a vehicle

Publication Date: 2011.10.12 FRENI BREMBO SPA

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AI summary

An adjustment device (4) for the release position of an operation element (8) of a brake. The device (4) comprises an articulated rod (20) hinged in a fulcrum (16) and connected in rotation to the operation element (8). The articulated rod (20) comprises an adjustment end (28) provided with a pin (29) having an adjustment hole (32) at least partly threaded and engaged with a threaded portion (48) of a push rod (40), operatively connected to operation means (44) of the brake. The device comprises anti-rotation means (74, 78), suitable for locking in rotation the push rod (40), relative to the adjustment axis (Y-Y).