CV Joint Boot Clamp Structure With Pressing Portions Against Slippage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing boot clamping structures for constant velocity joints in vehicles fail to securely clamp the boot and clamp together, leading to slippage and compromised sealing performance, especially in harsh temperature environments where the boot distorts and lubricant leakage occurs.
Innovation Solution
A boot clamping structure featuring main and auxiliary pressing portions with protrusions on the clamp and boot surfaces, respectively, to ensure firm fastening and prevent slippage, using metallic materials for the clamp and rubber for the boot, with protrusions shaped like 'X' or ' ' to enhance the grip and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple clamp structure is used to fasten the boot, then the device complexity is reduced, but the reliability of the seal deteriorates due to slippage between clamp and boot
Solution Approach 1:
The clamp incorporates pressing portions with protrusions at specific locations on its inner circumferential surface, creating localized high-friction zones. These protrusions concentrate the clamping force and friction at critical points along the boot circumference, preventing slippage without requiring a completely complex clamp structure. The pressing portions are strategically positioned to address the most critical sealing zones.
Solution Approach 2:
The pressing portions are designed to apply preliminary frictional force and mechanical interlocking action before the boot undergoes thermal expansion or contraction during operation. By establishing initial mechanical engagement through the protrusions, the clamp prevents relative motion between the clamp and boot even when temperature changes cause the boot to distort.
2Reliability
If the clamp is tightly fastened to prevent slippage, then the sealing performance improves, but the boot may be damaged due to excessive clamping force
Solution Approach 1:
Instead of applying uniform clamping force around the entire boot circumference, the pressing portions concentrate force only at specific locations where protrusions contact the boot. This localized approach provides sufficient friction to prevent slippage while avoiding excessive force that could damage the boot material elsewhere. The non-contact portions of the boot are relieved from unnecessary stress.
Solution Approach 2:
The clamp applies more than enough clamping force at the specific pressing portions to prevent slippage, but only over a limited portion of the boot circumference. This partial action approach ensures reliable sealing at critical zones without subjecting the entire boot to excessive force that would cause damage. The protrusions are sized and positioned to provide adequate friction without over-compression.
3Adaptability or versatility
If the boot is made flexible to accommodate temperature changes, then the adaptability improves, but the slippage between clamp and boot increases
Solution Approach 1:
The pressing portions with protrusions establish preliminary mechanical interlocking engagement between the clamp and boot before thermal distortion occurs. This preliminary action creates a mechanical keying effect that prevents relative motion even when the flexible boot expands or contracts due to temperature changes. The protrusions engage the boot material in advance, locking it in position.
Solution Approach 2:
The pressing portions are positioned at specific locations on the boot where flexibility is least critical for sealing performance. By concentrating clamping force at these strategic locations rather than uniformly across the entire boot, the design maintains reliable clamp-boot connection at critical sealing zones while allowing the boot to remain flexible elsewhere to accommodate thermal expansion and contraction.
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
The structure effectively prevents lubricant leakage by ensuring a secure clamp-boot interface, even under rotational stress in extreme temperatures, thereby improving the sealing performance and maintaining lubrication within the joint.
Implementation Method 1
the boot is pressed by the main pressing portion while the clamp is fastened so that the clamp and the boot can be firmly fastened to each other without running against each other
Implementation Method 2
an auxiliary pressing portion that is provided to be protruded in a second direction toward the clamp on an outer circumferential surface of the boot
Data Source
Figure 1
Figure 2
Figure 3
AI summary
It is a technical object of the present invention to provide a boot clamping structure for a constant velocity joint that can securely fasten a clamp and a boot so that the clamp and the boot do not run against each other. To this end, the boot clamping structure for a constant velocity joint of the present invention is a boot clamping structure for a constant velocity joint for fastening both ends of a boot using a clamp, and includes a main pressing portion that is provided to be protruded in a first direction toward the boot on an inner circumferential surface of the clamp.