Vehicle height adjustment device and vehicle height adjustment method
AssigneeIsuzu Motors Limited
InventorsSatoshi Hirao, Susumu Kawahata
Life of this patent
Estimating the term…
Abstract
A vehicle height adjustment device has an adjustment bolt (30) rotatably supported by or fixed to a wheel-side member or a vehicle-body member, and a spring seat member (10) threadedly engaging with the adjustment bolt. Rotation of the spring seat member is limited by a bump rubber pedestal (41) (or a coil spring bracket (9)). Displacement of the spring seat member occurs in an axial direction of rotation of the bolt, in accordance with rotation of the bolt. According to the present invention, rotation of the spring seat involved in rotation of the bolt for adjusting the vehicle height can be restricted, and a construction of a vehicle height adjustment mechanism can be simplified so that the number of parts or members of the device is reduced.
Claims14
A vehicle height adjustment device for a vehicle suspension system having a compression coil spring interposed between a wheel-side member carrying a wheel and a vehicle-body member, which regulates a position of a spring seat member abutting against an end portion of the spring, so as to adjust a vehicle height, comprising:
- an adjustment bolt which is rotatably supported by the wheel-side member or the vehicle-body member and which is able to be fixedly secured to the wheel-side member or the vehicle-body member;
- and
- the spring seat member provided with a recess with an internal thread formed therein, which threadedly engages with said bolt, wherein rotation of said spring seat member is limited by a component of the wheel-side member or the vehicle-body member for causing a relative displacement of said spring seat member in an axial direction of rotation of said bolt in accordance with rotation of the bolt,
- wherein said bolt is securely fastened to the wheel-side member or the vehicle-body member for fixing a position of said spring seat member,
- wherein said bolt has a large-diameter screw part which is inserted into the recess and which is provided with an external thread engageable with the internal thread of the recess;
- a shank with a relatively small diameter, which is integral with the large-diameter screw part and which is inserted through a through-hole formed in said wheel-side or vehicle-body member;
- a small-diameter screw part integrally connected to or continuous with the shank;
- and rotating tool engagement means integrally provided on an end portion of the small-diameter screw part, and
- wherein a boss portion having said through-hole is formed in said wheel-side or vehicle-body member, and the boss portion has a flat bearing surface abutting against a step formed in a transition between said large-diameter screw part and said small-diameter shank.
A vehicle height adjustment device for a vehicle suspension system having a compression coil spring interposed between a wheel-side member carrying a wheel and a vehicle-body member, which regulates a position of a spring seat member abutting against an end portion of the spring, so as to adjust a vehicle height, comprising:
- an adjustment bolt which is rotatably supported by the wheel-side member or the vehicle-body member and which is able to be fixedly secured to the wheel-side member or the vehicle-body member;
- the spring seat member which threadedly engages with said bolt;
- and
- rotation restriction means provided on the wheel-side member or the vehicle-body member for restricting rotation of the spring seat member by abutting against the rotated spring seat member;
- wherein said spring seat member is provided with a recess in which a thread is formed;
- wherein said bolt is provided with a large-diameter screw part threadedly engaging with said recess, a small-diameter shank integrally connected to or continuous with said large-diameter screw part, securing means for releasably fastening the small-diameter shank to the wheel-side member or the vehicle-body member, and engagement means for engaging with a rotating tool for rotating said shank;
- wherein said shank extends through a through-hole formed in the wheel-side member or the vehicle-body member;
- wherein said wheel-side member or the vehicle-body member is formed with a bearing surface, which is in plane contact with a step formed in a transition between said large-diameter screw part and said small-diameter shank so as to rotatably carry said bolt on said wheel-side or vehicle-body member, and
- wherein said step forms an annular journal surface which is seated on said bearing surface.
Dependencies are inferred from the claim text.