Sand Bunker Rake Attachment with Ball Joint and Angle Limiter

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Solution Overview

Problem

Existing sand bunker rake and infield groomer mounting schemes limit functionality, require excessive time and effort to adjust plow angles, and often necessitate repeated passes over the same area due to lack of angle restriction and inefficient attachment mechanisms.

Innovation Solution

A sand bunker rake/infield groomer vehicle with a frame, rotatably mounted wheels, a power source, and a rear attachment structure featuring a ball joint, pivoting bracket, and angle limiter, allowing for flexible motion and controlled height adjustment of the rake/grooming attachment, along with a trip mechanism to handle obstacles, enhancing operational efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a rigid fixed mounting scheme is used for the rake/grooming attachment, then the structure is simple and stable, but the functionality is limited and requires repeated passes over the same area

Engineering Contradiction:
Improvefunctionality of grooming attachmentVSAvoidmounting scheme complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies the dynamics principle by replacing the rigid fixed mounting scheme with a dynamic mounting system that includes a ball joint and pivoting bracket. The ball joint enables the rake/grooming attachment to rotate and adapt to varying terrain conditions, while the pivoting bracket allows angle adjustment. This dynamic configuration provides multiple degrees of freedom, enabling the attachment to function effectively on different surface conditions without requiring repeated passes, thus resolving the contradiction between adaptability and device complexity.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If no angle limitation is provided for the rake/grooming attachment, then the adaptability is increased, but the effort and time to adjust plow angle increases

Engineering Contradiction:
Improveeffort to adjust plow angleVSAvoidangle adjustment range
Core Design Contradiction:
Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent applies the preliminary action principle through the angle limiter mechanism, which pre-configures specific angular positions for the rake/grooming attachment. The angle limiter includes detents or stops that automatically guide the attachment to predetermined optimal angles, eliminating the need for manual measurement and adjustment. This allows operators to quickly switch between different grooming modes (e.g., shallow grooming vs. deep rake) without spending time on precise angle setting, thus resolving the contradiction between ease of operation and adaptability.

Inventive Principle:
Principle #10Preliminary action

3Adaptability or versatility

If a complex mounting scheme is used to provide full adjustment freedom, then the adaptability is maximized, but the device complexity increases unnecessarily

Engineering Contradiction:
Improveadjustment freedom of attachmentVSAvoidmounting structure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies the segmentation principle by dividing the mounting system into distinct functional modules: a ball joint for rotational movement, a pivoting bracket for angular adjustment, and an angle limiter for position control. Each module performs a specific function, allowing independent optimization and maintenance. This modular segmentation provides comprehensive adjustment freedom while keeping each component relatively simple, avoiding the need for a single complex mounting mechanism, thus resolving the contradiction between adaptability and device complexity.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentEP3740619B1Sand bunker rake/infield groomer vehicle
Publication Date: 2022.03.09 MTD PRODUCTS INC
  • EP3740619B1 patent drawingFigure 1
  • EP3740619B1 patent drawingFigure 2A
  • EP3740619B1 patent drawingFigure 2B

AI summary

A sand bunker rake/infield groomer vehicle (20) having a frame (24); a plurality of wheels (26) to traverse a driven surface, wherein the wheels are rotatably mounted to the frame; a power source mounted to the frame; and a rear attachment structure (36) attached to the frame, wherein the rear attachment structure provides a joint (46) enabling rotation; a bracket (50) including a shaft (54) wherein the bracket is configured to cooperate with an associated rake/grooming attachment (68); and a pivoting bracket (64) mounted to the frame.