Grinding head for floor grinding machine and method of assembling a grinding head, setting a belt tensioner, servicing, assembling or disassembling a belt pulley for a floor grinding machine

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Solution Overview

Problem

Existing grinding heads for floor grinding machines are complex to assemble, disassemble, and service, which complicates maintenance and repair processes.

Innovation Solution

A simplified grinding head design featuring a two-piece casing structure with axially distal portions that join by bearing on each other, along with accessible belt tensioners and adjustable locking devices, facilitates easier assembly, disassembly, and servicing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a traditional multi-piece grinding head casing structure is used, then the structural strength and sealing are improved, but the assembly and disassembly processes become complex and time-consuming

Engineering Contradiction:
Improvecasing structural strengthVSAvoidassembly and disassembly ease
Core Design Contradiction:
StrengthVSEase of operation

Solution Approach 1:

The grinding head casing is divided into exactly two segments (upper and lower casing members) that can be easily separated and reassembled. This segmentation provides sufficient structural strength while enabling simple assembly and disassembly operations, resolving the contradiction between strength and ease of operation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The belt pulley is designed with a nested structure where the locking device can be inserted through the casing member to secure the pulley. This nesting approach allows for simple locking and unlocking operations while maintaining the structural integrity of the casing, addressing both strength and operational ease requirements.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Adaptability or versatility

If a complex multi-component grinding head design is used, then the functional capabilities are improved, but the servicing and maintenance processes become difficult and time-consuming

Engineering Contradiction:
Improvefunctional capabilitiesVSAvoidservicing and maintenance ease
Core Design Contradiction:
Adaptability or versatilityVSEase of repair

Solution Approach 1:

The belt pulley is designed to be extractable from the grinding head casing through simple removal of the locking device. This extraction capability enables easy servicing and maintenance of the belt drive system while preserving the functional capabilities of the grinding head, resolving the contradiction between versatility and ease of repair.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The locking device for the belt pulley is designed to be dynamically adjustable and easily operable from the outside of the casing. This dynamic design allows for quick servicing and maintenance operations without disassembling the entire grinding head, maintaining functional capabilities while improving ease of repair.

Inventive Principle:
Principle #15Dynamics

3Stability of the object's composition

If the belt pulley is enclosed within the grinding head casing, then the structural integrity is improved, but the accessibility for belt tension adjustment and pulley servicing is reduced

Engineering Contradiction:
Improvestructural integrityVSAvoidaccessibility for tension adjustment
Core Design Contradiction:
Stability of the object's compositionVSEase of operation

Solution Approach 1:

The locking device acts as an intermediary element that connects the externally accessible casing surface to the internally located belt pulley. This mediator allows for tension adjustment and pulley servicing from outside the casing while maintaining the structural integrity and enclosed design, resolving the contradiction between structural stability and operational accessibility.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS11701751B2Grinding head for floor grinding machine and method of assembling a grinding head, setting a belt tensioner, servicing, assembling or disassembling a belt pulley for a floor grinding machine
Publication Date: 2023.07.18 HUSQVARNA AB
  • US11701751B2 patent drawing
  • US11701751B2 patent drawing
  • US11701751B2 patent drawing

AI summary

The present disclosure relates to a grinding head (1) for a floor grinding machine for grinding floor surfaces of stone or stone-like material. Such a grinding head (1) comprises a lower casing member (3), comprising a lower support (31) and an upwardly extending edge portion (32), and an upper casing number (2), comprising an upper cover (21) and a downwardly extending edge portion (22), wherein the upper casing member (2) is joinable to the lower casing member (3) by causing axially distal portions of the edge portions to bear on each other.