Vehicle Transmission Shift Cam Stopper Nesting

Solution Overview

Problem

The existing vehicle transmission designs, which position the shift arm stopper away from the transmission, result in increased size and potentially deteriorated motion performance due to the lack of component concentration.

Innovation Solution

The transmission design incorporates a shift cam stopper positioned partially overlapping with the shift fork, allowing for a more compact configuration by concentrically arranging components, thereby reducing the overall size and improving performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the shift arm stopper is disposed away from the transmission, then the structure to hold the shift stopper plate becomes easier to configure, but the size of the transmission increases

Engineering Contradiction:

Improveease of configuring structureVSAvoidsize of transmission

Core Design Contradiction:

Ease of manufactureVSVolume of moving object

Solution Approach 1:

The shift cam stopper is merged with the shift fork assembly by positioning it to overlap with the shift fork when viewed from the axial direction of the shift cam. This integration allows the stopper to be held by the shift fork structure itself, eliminating the need for separate support structures and reducing overall transmission size.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The shift cam stopper is nested within the spatial envelope of the shift fork assembly. By disposing the stopper at a position overlapping with the shift fork, the stopper utilizes the existing structural space, effectively nesting one component within another's footprint and minimizing the transmission's overall volume.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of manufacture

If the shift arm stopper is disposed away from the transmission, then the structure to hold the shift stopper plate becomes easier to configure, but the concentration of components deteriorates

Engineering Contradiction:

Improveease of configuring structureVSAvoidconcentration of components

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The shift cam stopper is merged with the shift fork assembly by positioning it to overlap with the shift fork when viewed from the axial direction of the shift cam. This integration allows the stopper to be held by the shift fork structure itself, eliminating the need for separate support structures and reducing overall transmission size.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of manufacture

If components are not concentrated, then the structure is easier to configure, but the motion performance of the vehicle deteriorates

Engineering Contradiction:

Improveease of configuring structureVSAvoidmotion performance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The shift cam stopper is merged with the shift fork assembly by positioning it to overlap with the shift fork when viewed from the axial direction of the shift cam. This integration allows the stopper to be held by the shift fork structure itself, eliminating the need for separate support structures and reducing overall transmission size.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS10544863B2Transmission for vehicle and engine

Publication Date: 2020.01.28 SUZUKI MOTOR CORP

AI summary

A transmission for vehicle includes a counter shaft, a drive shaft, a shift fork, a shift cam, and a shift cam stopper. The counter shaft has a plurality of counter gears. The drive shaft has a plurality of driven gears. The shift fork changes combinations between the plurality of counter gears and the plurality of driven gears. The shift cam moves the shift fork. The shift cam stopper holds a position of the shift cam. Viewing from an axial direction of the shift cam, the shift cam stopper is disposed at a position partially overlapping with the shift fork.