Dual Clutch Wear Readjustment With Adjustable Trigger Point
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Solution Overview
Problem
The existing dual clutch systems, such as DE 10 2013 207 694 A1, lack adjustability of the triggering point, which affects the precise adjustment of the clutch function in the assembled state, particularly due to the predetermined shape of the clamping spring and traction mechanism design.
Innovation Solution
The dual clutch system incorporates a clamping spring with an adjustable first stop interacting with the tie rod, allowing for adjustment of the triggering point, and a support ring that can be rotated via a ramp system to compensate for wear-related incorrect distances between the pressure plate and counterplate, ensuring precise engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the clamping spring shape and traction mechanism design are predetermined, then the structure is simplified, but the triggering point cannot be adjusted
Solution Approach 1:
The clamping spring is designed with an adjustable first stop that can be positioned at different locations along the spring's length. This allows the triggering point to be dynamically adjusted depending on the wear state of the friction linings, transforming a static structure into a dynamically adaptable one that maintains optimal performance throughout the clutch's service life.
Solution Approach 2:
The clamping spring is divided into multiple functional sections: a first section with a predetermined shape for basic clamping, and a second section with an adjustable first stop for triggering point adjustment. This segmentation allows each part to serve its specific function while enabling overall system adaptability without excessive complexity.
2Manufacturing precision
If the distance between pressure plate and counterplate is not adjusted for wear, then the structure remains simple, but the clutch function becomes imprecise
Solution Approach 1:
The adjustment device utilizes the existing wear of friction linings as the triggering mechanism. As the linings wear, the distance between the pressure plate and counterplate changes, automatically activating the adjustment mechanism through the clamping spring's interaction with the tie rod. This self-service approach eliminates the need for external adjustment systems while maintaining precision.
Solution Approach 2:
The system incorporates a feedback mechanism where the wear state of friction linings is continuously monitored through the distance change between the pressure plate and counterplate. This feedback triggers the adjustment device to compensate for wear, ensuring the clutch function remains precise throughout its service life without requiring external intervention.
3Adaptability or versatility
If the clamping spring is spring-loaded in circumferential direction, then the sensing ring can be adjusted, but the triggering point position is fixed
Solution Approach 1:
The first stop on the clamping spring is designed to be adjustable along the spring's length, allowing the triggering point to be dynamically positioned based on the wear state. This dynamic adjustment capability enables the system to adapt to different wear conditions while maintaining ease of operation through the spring-loaded mechanism that automatically engages the appropriate stop position.
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 solution enables precise adjustment of the clutch function by allowing the triggering point to be set and compensating for wear-related distance changes, enhancing the overall performance and reliability of the dual clutch system.
Implementation Method 1
The relief of the sensing ring results in the sensing ring being rotated in the circumferential direction via a spring mechanism
Implementation Method 2
the clamping spring has a first stop which interacts with the tie rod in the axial direction, so that by adjusting the distance between the first stop and a contact point of the tie rod, a trigger point of the clamping spring can be adjusted
Implementation Method 3
as a result of the ramp arrangement with the clutch cover, a contact surface for a lever spring is also displaced along the axial direction depending on wear
Implementation Method 4
With increasing wear of the friction linings, the counter-stop surface is moved along the axial direction
Data Source
Figure 1
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Figure 6~8
AI summary
The invention relates to a dual clutch (1) for coupling a drive shaft (2) of a motor vehicle (3) to one of two transmission input shafts (4, 5) of a transmission (6), having at least one counterplate (7) and two pressing plates (8, 9) for the pressing of in each case one clutch disc (10, 11) between the at least one counterplate (7) and each pressing plate (8, 9) with frictionally engaging action, wherein the first pressing plate (8) is arranged on a first side (12) of the counterplate (7), and a clutch cover (13) and a lever spring (14) are arranged on an opposite, second side (15) of the counterplate (7). The first pressing plate (8) can be displaced relative to the clutch cover (13) along an axial direction (17) by the lever spring (14) via a tension anchor (16); wherein the dual clutch (1) furthermore has at least one readjustment device (18) for the readjustment of a wear-induced incorrect spacing of the first pressing plate (8) to the counterplate (7), which readjustment device comprises a sensing ring (20), which is spring-loaded in a circumferential direction (19), and a clamping spring (21). Proceeding from a fastening (30) to the clutch cover (13) at a first end (31), the clamping spring (21), in a first section (32), extends substantially along the circumferential direction (19) along the contact region (25), and in a second section (33) which adjoins the first section (32), extends in the axial direction (17) through an opening (34) in the tension anchor (16). At a second end (35) which is provided there, the clamping spring (21) has a third section (36) with a stop (37) which interacts in the axial direction (17) with the tension anchor (16), such that, by means of an adjustment of the distance (38) between the stop (37) and a contact point (39), which interacts therewith, of the tension anchor (16), a triggering point (40) of the clamping spring (21) can be adjusted, at which triggering point, during an actuation of the lever spring (14), the clamping of the sensing ring (20) by the clamping spring (21) in the contact region (25) can be at least reduced by means of the tension anchor (16).