Commercial Vehicle Seat Double Locking Mechanism
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Solution Overview
Problem
Existing commercial vehicle seats with transverse swinging mechanisms experience unwanted play due to the technical requirement of a degree of freedom in rotation, leading to a wobbling sensation, and are hindered by the complexity and maintenance needs of known locking devices with multiple articulated components.
Innovation Solution
A commercial vehicle seat with a transverse swinging device featuring two spaced locking units, each with pivotable or linearly displaceable locking elements arranged in a horizontal plane between transverse rail units, providing a play-free and resilient locking mechanism that is compact and reduces the overall seat height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a transverse swinging device with slide rail elements is used to allow lateral movement of the seat part, then seating comfort on difficult terrain is improved, but play and wobbling occur due to the required degree of freedom in rotation
Solution Approach 1:
The locking device is divided into two separate locking units, each with its own locking element that can be independently actuated. This segmentation allows the system to maintain stability when locked while preserving the ability to swing when unlocked, resolving the contradiction between comfort and stability.
Solution Approach 2:
The locking elements are designed to be pivotable about a vertical axis, allowing them to dynamically transition between a locked position (providing stability) and an unlocked position (allowing swing for comfort). This dynamic capability resolves the contradiction by providing both states as needed.
2Stability of the object's composition
If locking devices with multiple articulated components are used to fix the cross slide part, then the seat can be stabilized, but the device becomes large and requires intensive maintenance
Solution Approach 1:
The invention extracts the essential locking function from the complex articulated mechanism, using a simple pivotable locking element that engages with a locking surface. This removes unnecessary components while retaining the stability function, resolving the contradiction between stability and simplicity.
Solution Approach 2:
Instead of using multiple articulated components to achieve locking, the invention inverts the approach by using a single pivotable element that locks through a simple engagement mechanism. This inversion simplifies the device while maintaining stability.
3Stability of the object's composition
If locking elements are arranged spaced apart in the longitudinal extension, then play-free fixing is achieved, but the locking device requires more space and increases seat height
Solution Approach 1:
The locking elements are arranged in a horizontal plane rather than vertically stacked, utilizing the horizontal dimension to achieve spaced-apart positioning for play-free fixing. This dimensional change allows precision fixing without increasing seat height, resolving the contradiction.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a commercial vehicle seat (1) comprising a seat part (2), a backrest part (3), and a seat base (7) for mounting on a body part (8) of a commercial vehicle, wherein the seat base (7) comprises a transverse pivoting device (21) with a transverse slide part (56) pivotable transversely to the longitudinal extent (55) of the commercial vehicle, by means of which at least the seat part (2) is pivotably mounted transversely to the direction of travel (5) on a base support part (33) of the seat base (7), and a locking device (60) for securing the transverse slide part (56) to the base support part (33), wherein the locking device (60) comprises two locking units (61, 62) arranged spaced apart from one another in the longitudinal extent (55) of the commercial vehicle, each with a pivotable bearing about a vertical pivot axis (63, 64) or displaceable bearing along a linear axis. has a locking element (65, 66),which are arranged synchronously in a horizontal plane (68) between two transverse rail units (34, 35) of the transverse oscillation device (21).