Vehicle Parking Lock Cam Guiding Device Segmentation
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Solution Overview
Problem
Conventional vehicle parking lock devices have a large and complex sleeve design, leading to increased manufacturing costs due to poor workability and higher working man-hours.
Innovation Solution
A vehicle parking lock device with a cam guiding system comprising a cylindrical first guiding member, a half-cylindrical second guiding member, and a fixing member, where the second guiding member is constructed separately to minimize size and shape, allowing for improved workability and reduced material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sleeve is integrally configured with the cam guide and stopper plate to bind the sleeve immovably in radial direction, then the sleeve is stable and non-rotatable, but the sleeve becomes large in size, complicated in shape, and expensive to manufacture
Solution Approach 1:
The patent divides the originally integral sleeve structure into separate components: a first guiding member (cylindrical) and a second guiding member (half-cylindrical). These segmented parts are assembled together to achieve the same functional constraints (radial immovability and non-rotation) while reducing individual component complexity and improving manufacturability.
2Reliability
If the sleeve is integrally configured with one or both of the cam guide and stopper plate, then the sleeve is bound immovably in radial direction, but the manufacturing cost increases due to poor workability and increased working man-hours
Solution Approach 1:
By segmenting the sleeve into a first guiding member and a second guiding member with simpler geometries, each component becomes easier to manufacture with better workability. The assembly process replaces the complex integral structure manufacturing, reducing working man-hours and manufacturing cost while maintaining the radial movement constraint function.
3Ease of operation
If the sleeve is made large to accommodate the operation space of the parking lock pole, then the functional requirement is met, but the manufacturing cost increases and workability decreases
Solution Approach 1:
The operation space requirement is met by the coordinated arrangement of the segmented first and second guiding members rather than a single large sleeve. This segmentation allows the components to be more compact and easier to manufacture while still providing the necessary space for the parking lock pole operation.
Data Source
AI summary
A vehicle parking lock device having a parking rod; a tapered parking cam disposed at a leading end portion of the parking rod; and a cam guiding device that guides the parking cam moved together with the parking rod in association with a projection of the parking rod toward the leading end portion to move a parking lock pole with the parking cam to a position of engagement with a parking lock gear rotated together with a transmission output member, the cam guiding device including a first guiding member in a cylindrical shape and a second guiding member in a half cylindrical shape that is disposed subsequently to the first guiding member, the second guiding member having a tapered guiding concave surface that guides the parking cam toward the parking lock pole in association with the projection of the parking rod toward the leading end portion.