Laser welded shock absorber with enhanced fatigue performance
By designing a laser-welded structure of circular wall hubs and plates in the vehicle crankshaft shock absorber, with the hollow channel tangent to the axis of rotation, the problem of stress concentration in the weld is solved, and fatigue performance and weld integrity are improved.
CN117162719BActive Publication Date: 2026-06-16GM GLOBAL TECHNOLOGY OPERATIONS LLC
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Patent Information
- Application Number
- CN202211327213.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2022-05-26
- Filing Date
- 2022-10-27
- Publication Date
- 2026-06-16
- Estimated Expiration
- 2042-10-27
AI Technical Summary
Technical Problem
Existing vehicle crankshaft shock absorbers are prone to weld cracks under high stress conditions, resulting in insufficient fatigue performance.
Method used
A shock absorber structure was designed, comprising a hub and a plate with circular walls, which are laser-welded to form a weld nugget. The hollow channel is set at an angle tangent to the axis of rotation to reduce stress concentration.
Benefits of technology
It improves the fatigue life of the shock absorber, enhances the integrity of the weld, reduces stress-induced cracking, and extends the service life.
✦ Generated by Eureka AI based on patent content.
Abstract
A damper that dampens vibrations of a crankshaft of a vehicle is disclosed. The damper includes a hub having a circular wall extending about an axis of rotation to define a bore formed therethrough. The wall includes a stepped portion extending radially from the wall and having a first arcuate portion formed thereon. The hub includes a main body portion extending radially from the wall to a lip to define an open cavity. The damper further includes an inertia ring disposed in the open cavity to provide inertia of the damper and a plate disposed on the lip of the hub and extending to the step of the wall to enclose the inertia ring in the open cavity. The plate abuts the wall and has a second arcuate portion arranged to cooperate with the first arcuate portion to define a hollow channel disposed radially about the wall of the hub. The damper includes a weld nugget interposed between the hub and the plate. The weld nugget has a root portion extending coincident with the axis of rotation through the hub and the plate to join the hub and the plate. The root portion has a tip defining a profile such that the hollow channel is disposed at an angle tangent to the profile.
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