Vehicle Shaft Blocking Mechanism With Precision Guide Rail Housing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blocking mechanisms for vehicle shafts face issues with precise positioning and deformation of guide rails due to manufacturing tolerances and mechanical stresses, leading to unreliable locking and potential damage under high loads.
Innovation Solution
A blocking mechanism with a machined housing that secures the guide rail, preventing deformation and ensuring precise positioning by integrating the guide rail within the transmission casing, reducing friction and wear through a movable carriage and cam follower system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a guide rail made of stamped sheet metal is used, then the device complexity and manufacturing cost are reduced, but the guide rail becomes deformed under mechanical stresses and positioning precision deteriorates
Solution Approach 1:
The guide rail is divided into two separate components: a guide rail body and a guide surface element. The guide surface is made as a separate precision component that can be attached to the guide rail body, allowing the main structure to remain simple while the critical positioning surface achieves high precision through separate manufacturing and assembly.
2Ease of manufacture
If manufacturing tolerances are relaxed to reduce cost, then ease of manufacture improves, but the angle between attachment surface and guide surface varies from 90°, causing unreliable blocking
Solution Approach 1:
A precision guide surface element acts as an intermediary component between the guide rail body and the roller. This intermediate element provides the critical 90° positioning accuracy required for reliable blocking, while the main guide rail body can be manufactured with relaxed tolerances using cost-effective methods.
3Weight of moving object
If the guide rail is made lighter and simpler, then weight and complexity are reduced, but it becomes susceptible to deformation under high loads during blocking
Solution Approach 1:
The guide rail system combines different materials or structural properties: the guide rail body uses a material or structure optimized for weight and simplicity, while the guide surface element uses a material or structure optimized for strength and dimensional stability under load, creating a composite structure that achieves both lightness and strength.
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
The solution ensures reliable and durable locking of vehicle shafts by maintaining guide rail integrity, reducing wear, and preventing excessive loads from damaging the mechanism.
Implementation Method 1
the movable carriage includes a cam follower capable of moving on the cam surface so as to move the movable pawl from the release position into the locking position
Implementation Method 2
The movable carriage includes a roller which interacts with a cam surface of the pawl in such a way that a translational movement of the movable carriage causes the pawl to pivot
Data Source
AI summary
A blocking mechanism including a transmission casing and a movable pawl having a locking finger. The movable pawl is pivotably mounted in a plane about a pivot axis on the transmission casing between a locking position in which the locking finger is engaged in the locking recess and a release position in which the locking finger is disengaged from the locking recess. The movable pawl includes a cam surface. A linear actuator moves a movable carriage guided by a guide rail, in which the movable carriage includes a cam follower capable of moving on the cam surface, and a housing formed in the transmission casing, in which the guide rail is fitted in the housing.