(preloaded) load cell for vehicle seat with lateral and...

G - Physics – 01 – L

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Details

G01L 1/26 (2006.01) B60N 2/00 (2006.01) B60R 21/00 (2006.01) G01G 19/40 (2006.01) G01G 19/414 (2006.01) B60R 21/01 (2006.01)

Patent

CA 2476708

A load cell is attached to seat parts (88, 15) (frame and pan) and includes a housing (2) and a mounting (1) acting upon a dish spring (4) with a strain gage (5). Lateral and angular decoupling is achieved with a ball bearing (43) and a slider (46). A sliding trap ring (122) provides a compliance to linear and angular misaligments and overload protection. A bushing (89) in form of a rubber sleeve with a Teflon coating is used between housing (2) and mounting (1). The bushing may also be steel ball bearings between two elastic rings. Springs (97) are precompressed by a preload bolt (125).

Dans la présente invention, une cellule de mesure est fixée sur des parties (88, 15) de siège (cadre et assise) et comprend un corps (2) et un moyen d'installation (1) s'appliquant sur un ressort incurvé (4) à jauge de contrainte (5). Le découplage latéral et angulaire est effectué par un roulement à billes (43) et un coulisseau (46). Une bague compensatrice coulissante (122) compense les défauts d'alignement linéaire et angulaire et protège contre la surcharge. Une garniture (89) se présentant sous forme d'une gaine en caoutchouc revêtue d'une couche de Téflon est utilisée entre le corps (2) et le moyen d'installation (1). La garniture peut également se présenter sous forme de roulements à billes en acier placés entre deux bagues élastiques. Des ressorts (97) sont précontraints par un boulon précontraint (125).

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