RU2471165C1 - Device to control toe-in in motion - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: proposed device comprises steerable wheels with bearings, axles with steering knuckles, bushes, rings, washers with nuts to secure the latter on axles, strain gages arranged on ring face surfaces and connected in bridge, power supply, solenoid coil, distributor, vessel with working fluid, pump, relay rod with tips that double as steering trapezoid ball-and-socket joint housings including also pins, blocks, thrust bearings, springs and covers, and hydraulic cylinder. Relay rod represents a one-piece element. Body of hydraulic cylinder is articulated via support to relay rod. On end of relay rod is provided with through cylindrical opening to receive ball-and-socket joint eccentric body. Joint body bottom section has outer thread for nut while top section is made integral with lever. Said lever is articulated with hydraulic cylinder rod to turn joint body and vary relay rod working length in the case of improper toe-in.

EFFECT: higher reliability.

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Description

The proposed device relates to vehicles and can be used to provide automatic regulation of the convergence of the steered wheels of the vehicle during movement.

A device is known for setting the convergence of steered wheels of a vehicle, comprising a reversible electric motor with power relays mounted on a steering knuckle of a steered wheel, a gear transmission connected on one side to a reversible electric motor, and on the other hand, through an actuator connected to said steering knuckle and a control system made according to the scheme of the measuring bridge and consisting of a deformation of the transverse steering rod mounted in one shoulder meter a bridge, in the diagonal of the power of which a battery is connected, a polarized relay installed in the measuring diagonal and connected to a power relay of a reversing electric motor, and a variable resistor with a slider connected to the aforementioned steering knuckle installed in the second arm of the measuring bridge, while the actuator made in the form of a helical gear, the nut of which is connected to the output shaft of the gear transmission, and a lever connected on one side to the screw of the helical gear, and with ugoy - with the help of an eccentric finger, is pivotally connected to said knuckle (AS USSR No. 652463, 03.15.79, Bull. No. 10).

The main disadvantages of this device are:

- change in the working length of the transverse steering rod when turning or curving the vehicle due to a change in the relative position (in plan) of the side lever of the steering trapezoid (steering knuckle) with an eccentric pin and the transverse link with a tip, which leads to a violation of the correct position of the steered wheels during rotation ( correct kinematics of rotation), lateral sliding and increased tire wear, increased resistance to movement and fuel consumption;

- the movable connection of the lower part of the ball eccentric finger of the ball joint of the steering trapezoid and the side lever of the trapezoid (knuckle), while it should be rigid (Car / N.N. Vishnyakov, V.K. Vakhlamov, A.N. Narbut and others. - M.: Mechanical Engineering, 1976. - S.238), which reduces the reliability of the steering.

Closest to the proposed device is a device for continuous automatic regulation of the convergence of the steered wheels in motion, containing sensors of lateral reactions of the road, which are strain gauges electrically connected according to the bridge circuit, mounted on the end surfaces of the rings, mounted on the axes of the rotary trunnions, on which bearings are mounted on the bushings steering wheels, and an electric signal amplifier, a reversing mechanism for changing the working length of the transverse steering rod and the system board the specified mechanism, electrically connected to the sensors of the side reaction of the road (RF patent No. 2348913, 03/10/2009, bull. No. 7).

The main disadvantages of this device are the lack of reliability and accuracy of regulation due to the fact that the reversing mechanism (hydraulic cylinder) integrated in the steering tie rod divides it into two components, which reduces its bending stiffness and longitudinal stability.

The technical result of the proposed device for automatically controlling the convergence of the steered wheels of a vehicle during movement is to increase the reliability and accuracy of the device.

The specified technical result is achieved by the fact that in a device for automatically controlling the convergence of steered wheels of a vehicle in motion, containing steered wheels with bearings, axles with knuckles, bushings, rings and washers with nuts for their fastening on the axles, strain gauges connected to an electric bridge , which are sensors of side reactions of the road, power source, electromagnetic coil, switchgear, reservoir with working fluid, pump, tie rod with tips, which at the same time are the bodies of the ball joints of the steering trapezoid, which also includes fingers, crackers, heels, springs and covers, and a reversing mechanism (hydraulic cylinder), the transverse steering rod is solid, the cylinder housing (reversing mechanism) is pivotally mounted through the bracket on the transverse link and the hole in one of the tie rod ends for the ball joint is made through cylindrical, into which the eccentric ball joint housing is installed, made in the lower part external thread for the nut, and in the upper part, at the same time with the lead, pivotally connected to the hydraulic cylinder rod, under the influence of which the hinge body rotates and changes the working length of the transverse steering rod when the steering wheel alignment is violated, which increases the steering rod rigidity, reliability and accuracy of the device .

The figure 1 shows a General diagram of the proposed device; figure 2 - ball joint connecting the transverse steering rod and the left side lever of the steering trapezoid.

The proposed device includes steered wheels 1 mounted through bearings and bushings 2 on the axles 3, on which the outer and inner rings 4 with load cells 5 are also installed, which are sensors of the side reactions of the road. The load cells 5 are mounted on the end surfaces of these rings, have the same electrical resistance and are connected by a bridge circuit 6. Points A and B of the electric bridge 6 are connected to a power source 7, and points C and D are connected to an electromagnetic coil 8, the core of which is rigidly connected to the spool 9 of a distribution device 10 of a flow of a working fluid. The device also contains a tank 11, a pump 12, a reversing mechanism for changing the working length of the transverse steering rod (hydraulic cylinder) 13 and an electric signal amplifier 14. Rings 4 with strain gauges 5, an electric bridge 6, a power supply 7, an electromagnetic coil 8, a distributor 10 of a working stream liquids and an electric signal amplifier 14 form a control system for a reversing mechanism 13 for changing the working length of the transverse steering rod. The transverse steering rod 15 is made integral, the hydraulic cylinder body through the bracket and the axis is hinged to its surface. The hole in one of the tie rod ends 16 under the ball joint is cylindrical, into which the eccentric ball joint housing 17 is mounted with a leash 18 connected to the hydraulic cylinder rod, and a nut 19, which is mounted on the housing 17 rigidly using one of the known methods, providing regulation convergence mobility tie rod end - eccentric housing. The ball joint also includes a finger 20, a cracker 21, a heel 22, a spring 23 and a cover 24.

The device operates as follows.

With the rectilinear movement of the vehicle and the correct convergence of the steered wheels, there are no lateral reactions of the road to these wheels, and the resistance of the load cells of the rings are equal to each other, so the voltage supplied from points C and D of the electric bridge 6 to the electromagnetic coil 8 is zero, and the spool 9 of the distribution device 10 is in a central (neutral) position.

If the convergence to the positive or negative side is deviated, the steered wheels 1 due to lateral reactions of the road through the bushings 2 and rings 4 will act on the load cells and change their electrical resistance. In this case, a voltage appears between points C and D of the electric bridge 6, a current will flow through the electromagnetic coil 8, and a magnetic flux will occur. The core of the coil 8 will move the spool 9 of the switchgear 10 left or right, providing a supply of working fluid from the pump 12 to the corresponding cavity of the hydraulic cylinder 13 (reverse mechanism for changing the working length of the transverse steering rod 15), the piston rod of which rotates the eccentric hinge body 17 through the leash left or right , changing, thus, the working length of the transverse steering rod 15 and providing the required convergence of the steered wheels 1.

Thus, the proposed device for automatic regulation of the convergence of the steered wheels of the vehicle during movement allows you to provide rigidity of the transverse steering rod, reliability and accuracy of the device.

Claims (1)

A device for automatically controlling the convergence of steered wheels of a vehicle during movement, comprising steered wheels with bearings, axles with slewing cams, bushings, rings and washers with nuts for their fastening on the axles, strain gauges mounted on the end surfaces of the rings and connected to an electric bridge, which are sensors for side reactions of the road, power supply, electromagnetic coil, switchgear, reservoir with working fluid, pump, steering tie rod with They are at the same time, which are simultaneously the bodies of the ball joints of the steering trapezoid, which also includes fingers, crackers, heels, springs and covers, and a reversing mechanism (hydraulic cylinder), characterized in that the transverse steering rod is integral, the housing of the hydraulic cylinder (reversing mechanism) is hinged through the bracket on the transverse link, and the hole in one of the ends of the tie rod under the ball joint is made through cylindrical, into which the eccentric ball joint housing is installed, made in the lower part with an external thread for the nut, and in the upper part at the same time with a leash pivotally connected to the hydraulic cylinder rod, under the influence of which the hinge body rotates and changes the working length of the transverse steering link when the toe of the steered wheels is violated.

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