Battery Bushing Sealing Structure for Tolerance Gap Assembly
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Solution Overview
Problem
The existing battery mounting structures suffer from gaps due to tolerance issues between bushings and the frame of the battery box, leading to insufficient tightening and unsealed connections.
Innovation Solution
A battery design that includes a bushing with a flange portion, rod portion, and connecting portion, which are sealably connected to mounting holes in beams, enhanced by sealing members and riveting structures to ensure a sealed connection between the bushing and beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bushings and bolts are used to attach the battery frame to the vehicle, then the battery can be mounted, but assembly tolerances cause gaps between the bushing and frame that prevent sealing and insufficient tightening
Solution Approach 1:
The patent introduces a sealing ring as an intermediary element between the bushing and the battery box frame. This sealing ring fills the gap caused by assembly tolerances, achieving both sealing and rigid connection simultaneously. The sealing ring is installed in a groove on the bushing and protrudes to contact the frame, eliminating the harmful effect of gaps while maintaining the mounting function.
Solution Approach 2:
The bushing structure is segmented into multiple functional parts: a mounting portion for attachment, a sealing portion with an installed sealing ring for sealing, and a reinforcing portion for structural support. This segmentation allows each part to independently address specific requirements - mounting reliability, sealing effectiveness, and connection strength - thereby resolving the contradiction between tolerance accumulation and connection quality.
2Ease of manufacture
If gaps exist between the bushing and frame due to tolerance, then assembly is easier, but the connection becomes unsealed and insufficiently tightened
Solution Approach 1:
The sealing ring serves as a mediator that accommodates assembly tolerances while ensuring sealing. It is designed to be elastically deformable, allowing it to be installed in the groove and then protrude to contact the frame, filling gaps without requiring high-precision assembly. This maintains ease of manufacture while achieving reliable sealing.
Solution Approach 2:
The sealing ring's cross-sectional shape is designed to change under compression - it is initially compressed during installation in the groove, then rebounds to protrude and contact the frame. This parameter change (from compressed to expanded state) allows the sealing ring to adapt to tolerance variations and ensure sealing effectiveness without compromising assembly ease.
Data Source
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AI summary
This application discloses a battery (100) and an electric apparatus. The battery (100) includes a box (10) and a bushing (30), where the box (10) is provided with a mounting beam (40), the mounting beam (40) includes a first beam (400) and a second beam (500), the first beam (400) is provided with a first mounting hole (401), the second beam (500) is provided with a second mounting hole (501), the bushing (30) includes a flange portion (31), a rod portion (32), and a connecting portion (33), along an axial direction of the rod portion (32), the flange portion (31) and the connecting portion (33) are respectively connected to two ends of the rod portion (32), the flange portion (31) protrudes from the rod portion (32) along a radial direction of the rod portion (32), the rod portion (32) passes through the first mounting hole (401), the connecting portion (33) passes through the second mounting hole (501), the flange portion (31) is sealably connected to the first beam (400) and/or the rod portion (32) is sealably connected to a wall of the first mounting hole (401), and the connecting portion (33) is sealably connected to a wall of the second mounting hole (501). The battery (100) can seal the bushing (30) to the first beam (400) and the second beam (500).