A kind of many bridges steering gear
Technical field: the utility model belongs to steering mechanism of motor vehicle, especially relates to a kind of many bridges steering gear.
Background technology: at present, what known many bridges steering gear adopted is that and arranged on left and right sides is provided with the connecting rod transmission, left side pull bar one end links to each other with the swing arm that turns on the steering box, other end direct connection is on the track arm of first steeraxle, and pull bar two ends, right side link to each other with the track arm of back steeraxle with the swing arm that turns to of back steeraxle respectively, drive many bridges by the both sides jointed gear unit and turn to, complex structure, exist driving error big when turning to, turn to inharmonious, defective such as wear on tyres is serious.
Summary of the invention: the purpose of this utility model is in order to overcome existing many bridges steering gear complex structure, the steerage gear error is big, turn to defectives such as inharmonious, that wear on tyres is serious, and a kind of simple in structure, many bridges steering gear that the steerage gear error is little is provided.
The utility model by bearing circle, Steering gear, steering box, turn to swing arm, turn to group to form behind propons pull bar, front steering axle, front axle steering knuckle arm, propons steering trapezium and at least one group, after turn to group control back steeraxle two-wheeled to rotate synchronously.After turn to group to comprise that pull bar between bridge, back steeraxle turn to swing arm, back steeraxle pull bar, back steeraxle, back steeraxle track arm, back steeraxle steering trapezium.Steering box, turn to pull bar between swing arm, propons pull bar, bridge, back steeraxle to turn to swing arm and back steeraxle pull bar to be arranged in the same side of automobile chassis frame, between bridge pull bar one end with turn to swing arm hinged, the other end turns to swing arm hinged with the back steeraxle, and back steeraxle turns to the swing arm other end hinged with back steeraxle pull bar.
The beneficial effect of utility model is, pull bar, propons pull bar and back steeraxle pull bar turn to the line of centres of swing arm swing not parallel with the back steeraxle between bridge, but angled, and the back steeraxle turns to and keeps a stable drive ratio between the swing arm.Each back steeraxle turns to the length of swing arm and arranges identical with the relative position of steeraxle like this, make the back steeraxle turn to swing arm identical with the transmitting ratio of track arm, realize the dynam between each steering wheel angle and the coupling of mechanical property, it is big to have solved existing many bridges steering gear driving error, turn to inharmonious, the problem that wear on tyres is serious.
Description of drawings:
Fig. 1 is a front view of the present utility model;
Fig. 2 is a birds-eye view of the present utility model.
1-bearing circle among the figure, the 2-Steering gear, the 3-steering box, 4-turns to swing arm, 5-propons pull bar, the 6-front steering axle, 7-front axle steering knuckle arm, 8-propons steering trapezium, pull bar between the 9-bridge, steeraxle turns to swing arm behind the 10-, steeraxle pull bar behind the 11-, steeraxle behind the 12-, steeraxle track arm behind the 13-, steeraxle steering trapezium behind the 14-, pull bar two between the 15-bridge, steeraxle turns to swing arm two behind the 16-, steeraxle pull bar two behind the 17-, steeraxle two behind the 18-, steeraxle track arm two behind the 19-, steeraxle steering trapezium two behind the 20-
The specific embodiment: in Fig. 1, a kind of many bridges steering gear is three bridge steering gears, by bearing circle (1), Steering gear (2), steering box (3), turn to swing arm (4), propons pull bar (5), front steering axle (6), front axle steering knuckle arm (7), propons steering trapezium (8), pull bar between bridge (9), back steeraxle turns to swing arm (10), back steeraxle pull bar (11), back steeraxle (12), back steeraxle track arm (13), back steeraxle steering trapezium (14), pull bar two (15) between bridge, back steeraxle turns to swing arm two (16), back steeraxle pull bar two (17), back steeraxle two (18), back steeraxle track arm two (19), back steeraxle steering trapezium two (20) is formed.Steering box (3), turn to swing arm (4), propons pull bar (5), after turn to pull bar (9) between the bridge of group, back steeraxle turns to swing arm (10), back steeraxle pull bar (11), pull bar two (15) between bridge, back steeraxle turns to swing arm two (16), back steeraxle pull bar two (17) is arranged in the same one-sided of automobile, bearing circle (1) is connected with steering box (3) by Steering gear (2), turn to swing arm (4) to be installed on the output shaft of steering box (3), propons pull bar (5) one ends with turn to swing arm (4) hinged, front axle steering knuckle arm (7) on the other end and the front steering axle (6) is hinged, propons steering trapezium (8) is hinged with the front axle steering knuckle arm (7) of front steering axle (6) both sides respectively, after turn between the bridge of group pull bar (9) one ends and turn to swing arm (4) hinged, the other end turns to swing arm (10) hinged with the back steeraxle, back steeraxle turns to swing arm (10) one ends to be fixed on the vehicle frame, the other end is hinged with back steeraxle pull bar (11), back steeraxle pull bar (11) other end links to each other with back steeraxle track arm (13) on back steeraxle (12), pull bar two (15) one ends turn to swing arm (10) hinged with the back steeraxle between bridge, the other end turns to swing arm two (16) hinged with the back steeraxle, back steeraxle turns to swing arm two (16) one ends to be fixed on the vehicle frame, the other end is hinged with back steeraxle pull bar two (17), and back steeraxle pull bar two (17) other ends link to each other with back steeraxle track arm two (19) on the back steeraxle two (18).
When turning to, driver's steering wheel rotation (1), swing by the swing arm (4) that turns to that Steering gear (2) is connected on the steering box (3) steering box (3) driving, drive the revolver rotation that front axle steering knuckle arm (7) drives front steering axle (6) by propons pull bar (5), be delivered to the right side wheel of front steering axle (6) again by propons steering trapezium (8); Simultaneously power again through pull bar between bridge (9), back steeraxle turn to pull bar two (15), back steeraxle between swing arm (10), back steeraxle pull bar (11), back steeraxle track arm (13), back steeraxle steering trapezium (14), bridge turn to swing arm two (16), back steeraxle pull bar two (17), back steeraxle track arm two (19), back steeraxle steering trapezium two (20) be delivered to respectively back steeraxle (12) and after the left and right wheels of steeraxle two (18), the realization synchronous coordination turns to, and reduces driving error.