IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0650206
(2003-08-28)
|
발명자
/ 주소 |
- Dagg,John K.
- Marchel,Jacek
|
출원인 / 주소 |
- General Motors Corporation
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
7 |
초록
▼
An apparatus for preloading a torsion bar includes an adjuster arm that is adapted to be attached to and extend radially from a torsion bar and includes a free end with an involute surface formed thereon. An adjustment nut is adapted to be rigidly attached to a support member for the torsion bar adj
An apparatus for preloading a torsion bar includes an adjuster arm that is adapted to be attached to and extend radially from a torsion bar and includes a free end with an involute surface formed thereon. An adjustment nut is adapted to be rigidly attached to a support member for the torsion bar adjacent a free end of the adjuster arm. An adjustment bolt having a free end for engaging the involute surface of the adjuster arm is threadably engaged in the adjustment nut. When the adjuster arm is attached to the torsion bar and the adjustment nut is attached to the support member, rotation of the adjustment bolt rotates the adjuster arm and the torsion bar about a longitudinal axis of the torsion bar thereby changing a preload applied to the torsion bar. The adjustment bolt remains perpendicular to the involute surface while the adjuster arm rotates.
대표청구항
▼
The invention claimed is: 1. An apparatus for preloading a torsion bar comprising: an adjustment nut adapted to be rigidly attached to a support member; an adjustment bolt threadably engaged in the adjustment nut, having a free end, and having a longitudinal axis; and an adjuster arm adapted to be
The invention claimed is: 1. An apparatus for preloading a torsion bar comprising: an adjustment nut adapted to be rigidly attached to a support member; an adjustment bolt threadably engaged in the adjustment nut, having a free end, and having a longitudinal axis; and an adjuster arm adapted to be attached to and extend radially from the torsion bar and have a free end including an involute surface formed thereon that is defined by an evolute circle and extends over a predetermined adjustment range of contact, the involute surface being in contact with the free end of the adjustment bolt and perpendicular to the longitudinal axis of the adjustment bolt at any point of contact between the involute surface and free end of the adjustment bolt within the adjustment range of contact. 2. The apparatus of claim 1 wherein the adjuster arm has a center of rotation and the evolute circle is defined by an equation (xc+ R')2+(yc)2=R'2, where xc is an X-axis distance of a point of contact, within the adjustment range of contact, between the adjustment bolt and the involute surface from a nominal position point of contact, yc is a Y-axis distance of the point of contact, within the adjustment range of contact, between the adjustment bolt and the involute surface from the nominal position point of contact, and R' is a radius of the evolute circle that has a center at the center of rotation of the adjuster arm. 3. The apparatus of claim 1 wherein the adjuster arm has a center of rotation and the involute surface is defined by a first equation x(t)=R*(cos(t)+t*sin(t)-1) and a second equation y(t)=R*(sin(t)-t*cos(t)), where R is a distance from the center of rotation to a nominal position point of contact between the adjustment bolt and the involute surface, t is an angle of rotation of the adjuster arm from the nominal position point of contact to a point of contact within the adjustment range of contact, x(t) is an X-axis distance of the point of contact between the adjustment bolt and the involute surface from the nominal position point of contact as a function of t, and y(t) is a Y-axis distance of the point of contact between the adjustment bolt and the involute surface from the nominal position point of contact as a function of t. 4. The apparatus of claim 1 wherein the free end of the adjustment bolt includes a tapered surface for contact with the involute surface. 5. An apparatus for preloading a torsion bar comprising: an adjustment nut adapted to be rigidly attached to a support member; an adjustment bolt threadably engaged in the adjustment nut, having a free end, and having a longitudinal axis; and an adjuster arm adapted to be attached to and extend radially f mm the torsion bar, having a center of rotation, and having a free end including a contact surface formed thereon that extends over a predetermined adjustment range of contact, is in contact with the free end of the adjustment bolt, and is defined by the following equation: where r is a radius of curvature of the contact surface, t is an angle of rotation of the adjuster arm from a nominal position point of contact between the adjustment bolt and an involute surface to a point of contact within the adjustment range of contact, a and b are the limits of the angle of rotation t with a≦t≦b, xd is an X-axis coordinate of a center point of the arc defined by the radius r, yd is a Y-axis coordinate of the center point of the arc defined by the radius r, x(t) is an X-axis distance of the point of contact between the adjustment bolt and the involute surface from the nominal position point of contact as a function of t and y(t) is a Y-axis distance of the point of contact between the adjustment bolt and the involute surface from the nominal position point of contact as a function of t. 6. The apparatus of claim 5 wherein the contact surface is further defined by the equations: and where R is a distance from the center of rotation to the nominal position point of contact between the adjustment bolt and the involute surface. 7. The apparatus of claim 5 wherein the free end of the adjustment bolt includes a tapered surface for contact with the contact surface. 8. A torsion bar adjustment mechanism for applying and adjusting a preload in an automotive suspension system, the adjustment mechanism comprising: a torsion bar having an end; a support member; an adjustment nut rigidly attached to the support member; an adjustment bolt threadably engaged in the adjustment nut, having a free end, and having a longitudinal axis; and an adjuster arm attached to the end of and extending radially from the torsion bar, having a center of rotation, and having a free end including a contact surface formed thereon that extends over a predetermined adjustment range of contact, is in contact with the free end of the adjustment bolt, and is defined by the following equation: where r is a radius of curvature of the contact surface, t is an angle of rotation of the adjuster arm from a nominal position point of contact between the adjustment bolt and an involute surface to a point of contact within the adjustment range of contact, a and b are the limits of the angle of rotation t with a≦t≦b, xd is an X-axis coordinate of a center point of the arc defined by the radius r, yd is a Y-axis coordinate of the center point of the arc defined by the radius r, x(t) is an X-axis distance of the point of contact between the adjustment bolt and the contact surface from the nominal position point of contact as a function of t, and y(t) is a Y-axis distance of the point of contact between the adjustment bolt and the contact surface from the nominal position point of contact as a function of t. 9. The apparatus of claim 8 wherein the contact surface is further defined by the equations: and where R is a distance from the center of rotation to the nominal position point of contact between the adjustment bolt and the involute surface.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.