Angle rotating device for wheel alignment test

An angle rotating device for wheel alignment test has a disk seat, a lever bar inserted in the disk seat, a cover plate covering the disk seat, a solid rotating disk disposed on the cover plate, a ring disposed in the solid rotating disk, and a hollow disk disposed in the cover plate. The solid rotating disk has a center shaft. The ring has an annular face having a plurality of circular apertures receiving a plurality of balls. A sleeve is disposed in a center of the ring. A plurality of springs are connected to the sleeve and the ring.

BACKGROUND OF THE INVENTION
 The present invention relates to an angle rotating device for wheel
 alignment test. More particularly, the present invention relates to an
 angle rotating device for wheel alignment test which can sense a
 deflection angle of a wheel sensitively.
 Referring to FIGS. 1, 2, and 2A, an angle rotating device A for wheel
 alignment test of the prior art has a cover plate A3, a solid rotating
 disk A1 disposed on the cover plate A3, a ring A2 disposed in the solid
 rotating disk A1, a movable rack A4 disposed on a bottom of the cover
 plate A3, and a movable plate A5 confined by the movable rack A4. The
 solid rotating disk A1 has a center shaft All. The ring A2 has an annular
 face A21 having a plurality of circular apertures receiving a plurality of
 balls A22. A sleeve A24 is disposed in a center of the ring A2. A
 plurality of springs A23 are connected to the sleeve A24 and the ring A2.
 The cover plate A3 has a center hole A32 and a plurality of cage posts A31
 confining the movable rack A4. The movable rack A4 has two transverse
 plates A41, two longitudinal plates A42, and a spacing A43 defined by the
 transverse plates A41. The movable plate A5 has a round hole A51. The
 spacing A43 receives the movable plate A5. The center shaft All passes
 through the sleeve A24, the center hole A32, and the round hole A51.
 Referring to FIG. 1 again, a wheel B presses the angle rotating device A
 for wheel alignment test of the prior art. Since the cage posts A31
 contact the movable rack A4, the friction between the cage post A31 and
 the movable rack A4 will be very large. Therefore, the angle rotating
 device A for wheel alignment test cannot sense a deflection angle of the
 wheel B sensitively.
 SUMMARY OF THE INVENTION
 An object of the present invention is to provide an angle rotating device
 for wheel alignment test which can sense a deflection angle of a wheel
 sensitively.
 Accordingly, an angle rotating device for wheel alignment test comprises a
 disk seat, a lever bar inserted in the disk seat, a cover plate covering
 the disk seat, a solid rotating disk disposed on the cover plate, a ring
 disposed in the solid rotating disk, and a hollow disk disposed in the
 cover plate. The disk seat has a sector recess, two arc recesses, a center
 groove, a round aperture, and a center aperture. The lever bar has an
 oblong hole, a round hole, and a circular hole. The hollow disk has a
 center through hole. The cover plate has a round opening receiving an
 upper portion of the hollow disk. The solid rotating disk has a center
 shaft. The ring has a central hole, an annular face having a plurality of
 circular apertures receiving a plurality of balls. A sleeve is disposed in
 the central hole of the ring. A plurality of springs are connected to the
 sleeve and the ring. The sector recess of the disk seat receives the lever
 bar. The circular hole of the lever bar matches the round aperture of the
 disk seat. A bolt is inserted in the round hole of the lever bar. The
 center shaft passes through the sleeve, the center through hole, and the
 oblong hole.

DETAILED DESCRIPTION OF THE INVENTION
 Referring to FIGS. 3, 4, 4A, 4B, 4C, and 4D, an angle rotating device for
 wheel alignment test comprises a disk seat 5, a lever bar 4 inserted in
 the disk seat 5, a cover plate 3 covering the disk seat 5, a solid
 rotating disk 1 disposed on the cover plate 3, a ring 2 disposed in the
 solid rotating disk 1, and a hollow disk 3A disposed in the cover plate 3.
 The disk seat 5 has a sector recess 53, two arc recesses 51, a center
 groove 52, a first round aperture 54, a second round apperure 55, and a
 center aperture 50.
 The lever bar 4 has an oblong hole 41, a round hole 40, and a circular hole
 42.
 The hollow disk 3A has a center through hole 3A1.
 The cover plate 3 has a round opening 31 receiving an upper portion of the
 hollow disk 3A.
 A positioning pin 3B is connected to the cover plate 3.
 The solid rotating disk 1 has a center shaft 11. The ring 2 has a central
 hole 23, an annular face 21 having a plurality of circular apertures
 receiving a plurality of balls 22. A sleeve 25 is disposed in the central
 hole 23 of the ring 2. A plurality of springs 24 are connected to the
 sleeve 25 and the ring 2.
 The sector recess 53 of the disk seat 5 receives the lever bar 4.
 The circular hole 42 of the lever bar 4 matches the first round aperture 54
 of the disk seat 5.
 The round hole 40 of the lever bar 4 matches the second round aperture 55
 of the disk seat 5.
 A bolt 4A is inserted in through the round hole 40 of the lever bar 4 and
 the second round aperture 55 of the disk seat 5.
 The center shaft 11 passes through the sleeve 25, the center through hole
 3A1, and the oblong hole 41.
 Since the friction between the lever bar 4 and the hollow disk 3A is
 insignificant, the angle rotating device for wheel alignment test can
 sense a deflection angle of a wheel sensitively.
 When the angle rotating device for wheel alignment test is not operated,
 the positioning pin 3B is inserted in the circular hole 42 of the lever
 bar 4 and the round aperture 54 of the disk seat 5.
 The invention is not limited to the above embodiment but various
 modification thereof may be made. Further, various changes in form and
 detail may be made without departing from the scope of the invention.