Hybrid Module Hub Assembly With Form-Fit Self-Alignment

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Solution Overview

Problem

Existing hub assembly methods for hybrid modules require manual alignment or complex securing using positioning pins, leading to increased assembly time and costs.

Innovation Solution

A hub assembly with form-locking connections that align connection partners via a form-fitting contour and counter-contour, allowing automatic alignment and riveted connection without the need for manual intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If manual alignment or positioning pins are used to align connection partners, then alignment precision is improved, but assembly time and device complexity increase

Engineering Contradiction:
Improvealignment precisionVSAvoidassembly time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The form-fitting contour and counter-contour are designed in advance to automatically guide and align the connection partners during assembly. This preliminary design of the geometric features enables self-alignment without requiring manual intervention or additional positioning components during the assembly process.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The form-fitting contour acts as an intermediary geometric feature between the connection partners. It mediates the alignment process by providing a complementary shape that naturally guides the connection partners into correct alignment, replacing the need for manual alignment or positioning pins.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Manufacturing precision

If positioning pins are used to secure connection partners, then alignment precision is improved, but device complexity and assembly costs increase

Engineering Contradiction:
Improvealignment precisionVSAvoidassembly complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The solution extracts and eliminates the positioning pins from the assembly system. By removing this additional component and replacing it with integrated form-fitting geometric features on the connection partners themselves, the device complexity is reduced while maintaining alignment precision.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The alignment function is merged into the basic structure of the connection partners through the form-fitting contour and counter-contour. Instead of being a separate function performed by positioning pins, the alignment capability is combined with the connection geometry itself, simplifying the overall device.

Inventive Principle:
Principle #5Merging (Combining)

3Adaptability or versatility

If manual alignment is performed, then flexibility is improved, but productivity and assembly time decrease

Engineering Contradiction:
Improveassembly flexibilityVSAvoidassembly speed
Core Design Contradiction:
Adaptability or versatilityVSProductivity

Solution Approach 1:

The connection partners are designed to perform their own alignment automatically through the form-fitting contour and counter-contour. This self-service mechanism eliminates the need for manual alignment operations, enabling fast automated assembly while maintaining the flexibility to accommodate different connection scenarios.

Inventive Principle:
Principle #25Self-service

Data Source

PatentEP4058681B1Hub assembly, hybrid module comprising the hub assembly, and method of assembling the hub assembly
Publication Date: 2025.07.02 ZF FRIEDRICHSHAFEN AG
  • EP4058681B1 patent drawingFigure 1
  • EP4058681B1 patent drawingFigure 2
  • EP4058681B1 patent drawingFigure 3a~3b

AI summary

It is known that mounting hybrid modules involves a connection being produced between two components connected for conjoint rotation by means of a rivet connection. It is the object of the invention to provide a hub assembly characterized by simple mounting. For this purpose, what is proposed is a hub assembly (1) for a hybrid module having a first and a second connection partner (2, 3), wherein the first and the second connection partner (2, 3) are arranged coaxially with one another with respect to a common main axis H, and wherein the first connection partner (2) has a first bearing portion (9) and the second connection partner (3) has a second bearing portion (10), and having a plurality of connecting elements (8), wherein the first and the second bearing portion (9, 10) each have a plurality of receiving openings (12) for receiving the connecting elements (8), wherein each connecting element (8) is guided through a receiving opening (12) in the first bearing portion (9) and through a receiving opening (12) in the second bearing portion (9) such that the first and the second connection partner (2, 3) are connected to one another for conjoint rotation via the connecting elements (8), wherein the first and the second connection partner (2, 3) are prepositioned with respect to one another via a form-fitting connection (13) such that the receiving openings (12) in the first and the second bearing portion (9 10) are each oriented in pairs in a positionally correct manner with respect to one another in the circumferential direction about the main axis H.