Shift Control Device Axial Drive Distribution
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Solution Overview
Problem
Existing shift control devices for vehicle transmissions have a concentrated disposition of drive means on one side of the shift drum, leading to larger internal combustion engine dimensions.
Innovation Solution
A shift control device with a power source at one end of the shift drum, a coaxially and rotatably connected transmission shaft, a barrel cam with a cam groove, and a lost motion mechanism that allows power transmission from the power source to the other end of the shift drum, with the power source's rotational axis perpendicular to the shift drum axis, enabling compact design and avoiding concentrated drive means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If drive means are concentrated at one end of the shift drum, then the structure is simplified, but the internal combustion engine dimensions increase
Solution Approach 1:
The drive means are segmented into two separate locations along the shift drum axis. The power source is positioned at one axial end while the transmission shaft extends through the shift drum to the other axial end, distributing the drive components along the axial direction rather than concentrating them at one location. This segmentation allows for a more compact engine layout.
Solution Approach 2:
The transmission shaft is configured to run coaxially through the shift drum, utilizing the axial dimension to distribute drive components. By positioning the power source at one axial end and having the transmission shaft extend to the other axial end, the drive means are distributed along the axial dimension, preventing concentration at a single location and enabling compact engine dimensions.
2Volume of moving object
If power source is positioned at one end with transmission shaft through the shift drum, then the internal combustion engine becomes compact, but the drive means structure becomes more complex
Solution Approach 1:
The drive means are divided into two axial segments: the power source at one axial end and the transmission shaft extending through the shift drum to the other axial end. This segmentation distributes components along the axial direction, achieving compact engine dimensions while organizing the structure in a systematic manner.
Solution Approach 2:
The transmission shaft is arranged to run coaxially through the shift drum, utilizing the axial dimension to distribute drive components. This axial arrangement of drive means, with the power source at one end and the transmission shaft extending to the other end, achieves compact engine dimensions through dimensional distribution.
3Volume of moving object
If the power source rotational axis is perpendicular to the shift drum axis, then space utilization is improved, but the power transmission mechanism becomes more complex
Solution Approach 1:
The power source is positioned with its rotational axis perpendicular to the shift drum axis, utilizing the radial dimension for power transmission. This perpendicular arrangement allows for compact space utilization by distributing components in different spatial dimensions, with the transmission shaft serving as the interface between the perpendicular power source and the axial shift drum.
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
This configuration allows for a compact internal combustion engine by distributing the drive means along the axial direction, preventing a concentrated disposition and enhancing shift precision and engine compactness.
Implementation Method 1
a clamping spring (136) that has a pair of clamping pieces (136a, 136a) at opposite ends and is attached to the transmission shaft (117), and the pin (133) and the transmission projection (135) being disposed between the two clamping pieces
Data Source
AI summary
A shift control device for a vehicle transmission is provided in which drive means for making a shift drum pivot is connected to the shift drum, wherein the drive means (112) includes a power source (113) disposed on at one end, in the axial direction, of the shift drum (104), and a transmission shaft (117) to which power from the power source (113) is transmitted at the one end, in the axial direction, of the shift drum (104), power from the transmission shaft (117) being transmitted to the other end, in the axial direction, of the shift drum (104). This enables an internal combustion engine to be made compact while avoiding a concentrated disposition of the drive means on one side, in the axial direction, of the shift drum.