Spare Wheel Pick-Up Unit Cam Stop Guide Surface Torque Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing units for picking up spare wheels face efficiency issues in torque transmission due to the cam's wobbling movement, which causes crushing and reduces the effectiveness of torque transfer, leading to difficulties in securely fixing the wheel in place.
Innovation Solution
The unit redesigns the stop mechanism to be located on the side of the cam, allowing for a guide surface interaction with a contact surface to determine the stop's travel, enabling improved torque transmission efficiency by preventing rotation and enhancing the support and sliding movements without pressure line constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stop is located on the edge of the cam and acts on the cam during wobbling movement, then the cam can be constrained to prevent rotation, but crushing occurs between the cam and stop which reduces torque transmission efficiency
Solution Approach 1:
The stop is repositioned from acting on the cam edge to acting on the cam from the side, changing the spatial dimension of the constraint mechanism. This dimensional shift allows the stop to engage with a lateral surface of the cam rather than the edge, eliminating the pressure line constraint and crushing while maintaining rotational prevention during wobbling movement.
Solution Approach 2:
A guide surface is introduced as an intermediary element between the stop and the cam. The guide surface interacts with a contact surface of the stop to determine the stop's travel path, ensuring proper alignment and movement of the stop during cam operation. This intermediary mechanism enables the stop to effectively constrain the cam without direct edge contact that causes crushing.
2Device complexity
If the stop acts on the cam from one edge with direct contact, then the structure is simple, but pressure line constraints cause crushing and reduce sliding efficiency
Solution Approach 1:
The stop mechanism transitions from edge-based contact to side-based contact with the cam, utilizing a different spatial dimension. The stop now acts on a lateral surface of the cam and is guided by a guide surface, which eliminates the pressure line constraint and crushing while maintaining structural efficiency for torque transmission.
Solution Approach 2:
The guide surface serves as an intermediary that determines the stop's travel and ensures proper engagement with the cam's side surface. This intermediary mechanism replaces direct edge contact, eliminating crushing while maintaining the simplicity and effectiveness of the stop mechanism for torque transmission during winding and unwinding operations.
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 improves torque transmission efficiency by allowing the cam to support and slide on the stop without pressure line issues, ensuring secure wheel fixation and enhanced torque transfer during both winding and unwinding operations.
Implementation Method 1
a wobbling movement occurs in the cam, i.e., the cam swings in time with a back and forth movement caused by the action of the eccentric shaft
Implementation Method 2
at least one guide surface, other than the area of contact between the stop and the edge of the cam, which interacts with a contact surface of the stop and determines the travel of said stop when the cam acts on the stop
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Unit for picking up spare wheels, comprising a gear assembly (50) which allows transmitting a torque, the gear assembly (50) comprising a cam (10) having a wobbling movement as the gear assembly (50) transmits the torque, and at least one stop (1) limiting the travel of said cam (10) during the wobbling movement, wherein the unit (100) comprises at least one guide surface (110) which interacts with a contact surface (2) of the stop (1) and determines the travel of said stop (1) when the cam (10) acts on the stop (1), the stop (1) acting on the cam (10) from one edge (12) of said cam (10).