Connecting Ring Locking for Sealed Brake Particle Evacuation
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Solution Overview
Problem
Existing railway braking systems emit atmospheric pollution in the form of fine particles due to friction between the friction pad and the disc, and the suction devices for capturing these particles are inefficient or difficult to mount when integrated with the shoe holder.
Innovation Solution
A friction assembly with a connecting ring that is secured to the shoe holder using a cavity and securing mechanism, allowing efficient evacuation of particles to a suction device, even when the suction device is an integral part of the shoe holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the suction device is integrated as an integral part of the shoe holder, then the device complexity is reduced and mounting is simplified, but the connecting ring cannot be properly mounted or secured
Solution Approach 1:
The connecting ring is divided into multiple parts: a first part with a collar that fits into the secondary conduit, and a second part that fits into the block. This segmentation allows the ring to be mounted in two stages, solving the contradiction by enabling proper installation while maintaining the integrated structure.
Solution Approach 2:
The collar is preliminarily positioned in the secondary conduit before the main assembly operation. This preliminary action creates a prepared pathway and positioning mechanism that facilitates the subsequent insertion and securing of the connecting ring, resolving the mounting difficulty while preserving structural integration.
2Reliability
If the connecting ring is securely locked in both directions, then the sealing reliability is improved, but the mounting operation becomes more difficult requiring access to both ends
Solution Approach 1:
Instead of requiring access to both ends of the connecting ring for mounting, the solution inverts the approach by providing access through only one end (the first end). The collar at the first end enables insertion and securing from a single accessible location, while the second end remains accessible only after assembly, thus achieving reliable locking without compromising mounting ease.
3Reliability
If the collar is deformed or compressed to secure the connecting ring, then the sealing is improved, but the mounting process becomes more complex
Solution Approach 1:
The collar is designed with dynamic properties that allow it to be deformed during the mounting process and then maintain its deformed state for securing purposes. This dynamic behavior enables the collar to be compressed or deformed temporarily during installation to achieve proper sealing, while the deformation itself becomes the securing mechanism, thus improving sealing without significantly complicating the manufacturing process.
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 solution ensures reliable and efficient capture of particles emitted during braking, maintaining a seal and facilitating easy mounting of the connecting ring, thereby reducing atmospheric pollution.
Implementation Method 1
This contact is achieved for example by deformation (crushing) of the collar 1082 between the bottom of the housing and the face 122
Implementation Method 2
Alternatively (as shown in figure 18, this contact is made by compression of a helical spring mounted on the tube between the collar 1082 and the bottom of the housing
Implementation Method 3
The pipe 150 and the suction device constitute a device for evacuating the particles
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a friction assembly (1) comprising: a shoe holder (3) including a secondary duct (38); a friction shoe (2) including a primary duct (28), which can be secured to the shoe holder (3); and a connecting ring (8) arranged in the secondary duct (38) and establishing a connection with the primary duct (28) when the primary duct (28) is aligned with the secondary duct (38), the friction assembly (1) further comprising a block (50) with a cavity (55) connected to a suction device and forming an integral part of the shoe holder (3). The block (50) includes a hole (58) connecting the cavity (55) to the secondary duct (38), and the friction assembly (1) comprises a mechanism (70) for securing the ring (8) to the block (50) when the ring (8) is arranged in the hole (58) and in the secondary duct (38).