Rotatable Rosette Winding Device for Cargo Securing
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Solution Overview
Problem
Existing winding devices for securing loads in vehicle cargo spaces are cumbersome due to large ratchets, require excessive force to unwind belts, are not compact enough to be used with raised loading floors, and lack the ability to fix objects in all directions, particularly the vertical axis, with limited tensioning force relying solely on a winding spring.
Innovation Solution
A winding device with a rotatable rosette mechanism that allows switching between two operating modes: one using a clock spring and another employing a ratchet wheel and sliding pawls for belt tightening, enabling secure fixing in all directions, including vertical, with a push-button lever mechanism for locking and unlocking the handle in the load rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a traditional ratchet mechanism is used in the winding device, then the webbing can be tightened, but the ratchet becomes excessively large and requires considerable force to operate
Solution Approach 1:
The patent introduces a rotatable rosette mechanism that dynamically switches between two operating modes: a first mode where only the winding spring is active, and a second mode where the ratchet wheel and sliding pawls engage for tightening. This dynamic switching allows the device to operate efficiently in different phases without requiring a continuously large ratchet mechanism.
Solution Approach 2:
The tightening function is segmented into two distinct phases: an initial winding phase using the spring alone, and a subsequent tightening phase using the ratchet mechanism. This segmentation allows each component to be optimized for its specific function, reducing the overall size and force requirements compared to a traditional continuous ratchet design.
2Volume of moving object
If the winding device is designed with a compact structure, then it can be used with raised loading floors, but the clamping force becomes limited
Solution Approach 1:
The device transitions from a static compact structure to a dynamic system that expands its clamping capability when needed. The rotatable rosette enables switching between a compact storage mode and an active tightening mode where the ratchet mechanism provides enhanced clamping force, thus maintaining compactness while overcoming force limitations.
Solution Approach 2:
The ratchet wheel and sliding pawls are integrated within the compact winding housing, nested in such a way that they occupy minimal space when not in use. The mechanism folds or retracts into the housing, allowing the device to maintain a compact form factor while still providing sufficient clamping force when the tightening function is activated.
3Force
If only a winding spring is used to secure objects, then the device structure is simple, but the clamping force is limited and objects cannot be fixed in all directions
Solution Approach 1:
The winding device is designed with multi-functionality through the rotatable rosette that enables two distinct operating modes. The device can operate in a simple spring-only mode for basic securing, or switch to a enhanced mode with ratchet wheel and sliding pawls for situations requiring greater clamping force and multi-directional fixation, thus providing universal applicability.
Solution Approach 2:
The device dynamically adapts its complexity based on operational needs. The rotatable rosette allows the user to engage or disengage the ratchet mechanism as required, transforming the device from a simple spring system to a more complex but more capable tightening system only when necessary, thereby optimizing the force-to-complexity ratio.
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
Enables efficient and versatile securing of loads in all directions within the cargo space, including vertical positioning, with reduced force requirement and enhanced compactness, allowing for secure object fixation using a combination of spring and ratchet mechanisms.
Implementation Method 1
A webbing (90) can be unwound from the housing of the winding device (1), the end of which can be attached to the load rail (101)
Implementation Method 2
The rosette (7) has two working positions and can be swivelled to the right or left. In one working position (release position) of the rosette (7), the webbing (90) can be wound onto or off the winding device (1). In the second working position (locking position), the unwinding of the webbing (90) from the winding device (1) is blocked.
Implementation Method 3
The actuating mechanism for unwinding the webbing (90) comprises a ratchet wheel (8), two sliding pawls (9, 9'), and a cam (10). The pawls (9, 9') are slidably arranged in the grooves (25, 25') of the flange (24) of the winding shaft (11) of the winding device (1).
Implementation Method 4
The push button with lever mechanism is used to unlock and lock the handle in the load rail (101).
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A winding device (1) in the vehicle cargo area has a winding housing (2) by means of which it is connected to the load rail (100) arranged on the longitudinal side of the vehicle cargo area. A webbing (90) can be unwound from the housing of the winding device (1), the end of which, in the form of a handle (3) with a base (5), can be attached to the load rail (101) arranged on the other longitudinal side of the vehicle cargo area. The winding device (1) has a handle (3) with a push button (4) attached to the end of the webbing (90), by means of which the fixation of the handle (3) in the load rail (101) is actuated, furthermore an actuation button (6) for locking the winding device (1) in the load rail (100) and a pivoting rosette (7) for actuating the actuation mechanism for unwinding the webbing (90).