Railway Switch Locking Device Lateral Mounting
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Solution Overview
Problem
The existing design of railway switch locking devices, particularly the locking parts, suffers from poor transmission of mechanical forces, leading to frequent ruptures and the need for frequent replacements due to a configuration where the contact surface and support surface are not optimally aligned, resulting in inefficient stress distribution.
Innovation Solution
The locking part is redesigned to have a contact surface opposite and parallel to its bearing surface against the frame, allowing for a simpler, parallelepipedal shape that is mounted laterally, enhancing stress transmission and reducing the likelihood of breaks, with screws providing secure and removable attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the locking part is mounted with contact surface and support surface at right angles (elbow configuration), then the part can be structurally compact, but the forces are poorly transmitted to the frame leading to ruptures
Solution Approach 1:
The invention inverts the traditional mounting configuration by changing from an elbow shape (contact surface vertical, support surface horizontal) to a straight configuration (both surfaces vertical and parallel). This inversion of the mounting orientation allows forces to be transmitted directly along the locking part's longitudinal axis, eliminating the weak junction zone and preventing ruptures.
2Ease of manufacture
If the locking part has complex shape with zones at right angles, then it can accommodate the elbow mounting, but the design becomes mechanically inefficient and prone to breaks
Solution Approach 1:
The invention changes the geometric parameters of the locking part from an elbow configuration (with perpendicular zones) to a straight parallelepipedal configuration. This parameter change aligns the contact surface and support surface parallel to each other, creating a direct force transmission path that significantly improves stress distribution and mechanical strength.
3Ease of repair
If the locking part is mounted from above on horizontal wall, then it can be securely attached, but the stress distribution becomes uneven causing frequent breaks
Solution Approach 1:
The invention transitions the mounting location from a horizontal upper wall to a vertical side wall of the frame. This dimensional change in mounting orientation allows the locking part to be attached laterally, creating a direct vertical force transmission path from the contact surface through the part to the frame, which evenly distributes stresses and prevents breaks.
Data Source
Figure 1~2
Figure 3~8
AI summary
The device has a fixed part integrated into a stock rail, and a movable part movable with respect to the fixed part. The fixed part comprises a locking piece provided with a contact surface (311) on which an end of a locking arm slides when the locking arm is in movement, where the locking arm is provided with a control branch. The locking piece is mounted against a metallic lateral wall (60) of a frame of the fixed part by a detachable fixation unit e.g. screw (70), along an axis perpendicular to the contact surface of the locking piece.