Drive Shaft Lubrication Control via Centrifugal Blocking
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Solution Overview
Problem
Existing driving force transmission devices in vehicles fail to optimally lubricate components according to running conditions, particularly at low speeds where insufficient lubrication can lead to gear defects due to inadequate oil dispersion and supply.
Innovation Solution
A driving force transmission device with a lubricating oil storage space in the drive shaft and a blocking mechanism using a conical spring and weight to control lubricating oil discharge based on rotational speed, ensuring optimal lubrication by blocking oil discharge at high speeds and releasing it at low speeds to maintain consistent lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lubricating oil is supplied by an oil pump, then lubrication can be maintained at low speeds, but the device complexity increases
Solution Approach 1:
The system uses the drive shaft's own rotation to generate centrifugal force for controlling oil discharge, eliminating the need for external control mechanisms. The blocking member automatically responds to rotational speed changes through centrifugal force, making the system self-regulating without additional actuators or control systems.
Solution Approach 2:
The patent replaces complex mechanical control systems (such as valves, actuators, or electronic controls) with a simple centrifugal force-based blocking member that automatically opens or closes the oil discharge hole based on rotational speed, significantly simplifying the overall system structure.
2Device complexity
If lubricating oil is dispersed by being carried up by a gear, then the structure is simple, but the amount of lubricating oil dispersed decreases at low rotational speeds
Solution Approach 1:
The lubricating oil is pre-stored in the lubricating oil storage space within the drive shaft before being needed. This preliminary storage ensures that oil is readily available for immediate discharge when required, eliminating delays and ensuring consistent lubrication regardless of operational speed.
Solution Approach 2:
The system changes the discharge parameter of lubricating oil based on rotational speed. At low speeds, the blocking member opens to allow oil discharge; at high speeds, it closes to prevent excessive discharge. This dynamic parameter adjustment ensures optimal lubrication across different operating conditions.
3Reliability
If a blocking member is added to control oil discharge, then lubrication can be optimized for different speeds, but the device complexity increases
Solution Approach 1:
The blocking member automatically responds to rotational speed changes through centrifugal force, making the system self-regulating without additional actuators or control systems. The elastic member provides automatic reset functionality, eliminating the need for external control mechanisms.
Solution Approach 2:
The blocking member's position (open or closed) changes based on rotational speed parameters. The elastic member's biasing force works in conjunction with centrifugal force to create a speed-dependent discharge control system that adapts to different operating conditions.
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 solution ensures consistent lubrication across all speed ranges, preventing gear defects and eliminating the need for forced lubrication methods like oil pumps, while maintaining a simple structure.
Implementation Method 1
The blocking member may be disposed inside the lubricating oil storage space to block the lubricating oil discharge hole with a centrifugal force generated by a rotation of the drive shaft.
Implementation Method 2
a carrying up gear configured to carry up a lubricating oil stored in the main body
Implementation Method 3
The driving force transmission device may include an elastic member configured to perform biasing in a direction in which the blocking member is separated from the lubricating oil discharge hole.
Data Source
AI summary
A driving force transmission device of a vehicle includes: a main body; a carrying up gear; a drive shaft; and a blocking member. A gear that transmits a driving force to the vehicle is housed in the main body. The carrying up gear carries up a lubricating oil stored in the main body. The drive shaft has, in the shaft, a lubricating oil storage space into which the carried up lubricating oil is introduced and a lubricating oil discharge hole through which the lubricating oil in the lubricating oil storage space is supplied to a bearing unit. The blocking member blocks the lubricating oil discharge hole in accordance with a rotational speed of the drive shaft.