A seal assembly (2) for a ballscrew comprises a seal body (4). The seal body (4) comprises a helical body portion having a central axis and extending through substantially a single helical turn about said central axis from a first end (10) to a second end (12) axially spaced from the first end (10). A connecting portion (14) extends generally parallel to the central axis (A) and connects the first and second ends (10, 12) of the helical body portion (8). A channel (21) is formed in a radially outer surface of the seal body (4), the channel (21) extending continuously around the helical body portion (8) and the connecting portion (14). An arcuate scraper seal portion (30) extends inwardly from a radially inner surface (31) of the connecting portion (14) for sealing engagement within a helical groove (22) of said ballscrew. A helical sealing portion (26) extends from a radially inner surface (29) of the helical body portion (8), extending circumferentially around the helical body portion (8) from the first end (10) to the second end (12) for engaging a radially outer helical ridge (24) of said ballscrew, the scraper seal portion (30) and helical sealing portion (26) forming a continuous seal around the inner diameter of the seal body (4). An energising member (6) is disposed within the channel (21) for radially inwardly preloading said scraper seal portion (30) and said helical seal portion (26).
HYBRID BALLSCREW SEAL
HYBRIDE KUGELUMLAUFSPINDELDICHTUNG
JOINT DE VIS À BILLES HYBRIDE
2020-08-26
Patent
Electronic Resource
English
BALL NUT AND BALLSCREW ABSOLUTE POSITION SENSOR FOR VEHICLE STEERING SYSTEM
European Patent Office | 2023
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