RU2423276C1 - Device for continuous automatic toe-in control - Google Patents

Abstract

FIELD: transport. ^ SUBSTANCE: invention relates to automotive industry and can be used for automatic toe-in control in motion. Proposed device comprises controlled wheels, sleeves, strain gages, axles with rotary cams, sleeves, rings and washers with nuts to fasten the former on the axle, power supply, electromagnetic coil, distributing device, vessel with working fluid, pump and transverse tie rod with reversing mechanism. Strain gages are secured on face surfaces of the rings and interconnected in bridge circuit to make road lateral response transducers. Outer rings on external (relative to bush) faces are provided with ledges. Lateral surfaces of washers fastening bushes and rings on wheel axles are axial bores that receive ring ledges. Radial ledges are made on washer inner diameters, axial grooves are made on wheel axles ends to receive radial ledges of washers. Bush ends have axial cutouts while all rings have their inner faces provided with axial ledges that enter bush cutouts. ^ EFFECT: higher reliability, sensitivity and accuracy of control in motion. ^ 5 dwg

Description

The invention relates to vehicles and can be applied to provide automatic regulation of the convergence of the steered wheels in the process of movement.

A device for automatically controlling the convergence of the steered wheels in the process of driving, containing sensors of the side reaction of the road acting on the steered wheels, which are piezosensors in the form of washers mounted on the axles of the steered wheels and electrically connected via a bridge circuit, a reversible mechanism for changing the working length of the transverse steering rod and a control system for the specified mechanism, electrically connected to the sensors of the side reaction of the road (RF Patent No. 49257, November 10, 2005, Bull. No. 31).

The disadvantage of this device is the low sensitivity, accuracy and reliability, because The lateral reaction sensors of the road also respond to axial forces arising in the cages of the tapered wheel bearings from vertical loads.

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 on a bridge circuit mounted on the end surfaces of the rings mounted on the axes of the rotary axles on which bearings are mounted on the bushings steered wheels, an electric signal amplifier, a reversing mechanism for changing the working length of the transverse steering rod and the control system ION said mechanism is electrically connected to the sensors of the road side reactions (Russian Patent №2348913, 10.03.2009, Bul. №7).

The disadvantages of this device is the lack of reliability, since during operation it is possible to rotate the bushings and rings with strain gauges relative to the axles of the wheels, which will lead to a failure of the device.

The technical result of the proposed device for continuous automatic regulation of the convergence of the steered wheels of the car during movement is to increase reliability.

The specified technical result is achieved by the fact that in a device for automatically controlling the convergence of steered wheels of a car during movement, containing steered wheels with bearings, axles with slewing fists, 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, electric signal amplifier, switchgear, reservoir with working fluid, pump, cross The front draft with a reversing mechanism, the outer rings on the outer (with respect to the sleeve) ends have axial cuts, the lateral surfaces of the mounting washers of the bushings and rings on the axles of the wheels have axial protrusions that enter the cutouts of the rings; in addition, these washers in the holes have radial protrusions, and at the ends of the axles of the wheels there are axial grooves that include the radial protrusions of the washers; the bushings at the ends have axial cuts, and all rings on the inner ends have axial protrusions included in the cutouts of the bushings, which prevents turning of the bushings and rings with strain gauges, increasing the reliability of the structure.

Figure 1 shows a General diagram of the proposed device; figure 2 - the axis of the steered wheel assembly.

The proposed device includes steered wheels 1 mounted through bearings mounted on bushings 2, rings 3 with strain gauges fixed on end surfaces (electric sensors of side reactions of the road) 4 on axles 5. At the ends of axles 5 of the wheels there are axial grooves 6. Strain gauges 4 have the same electrical resistances and are connected according to the bridge circuit 7. Points A and B of the electric bridge 7 are connected to the power source 8, and points C and D are connected to the electromagnetic coil 9, the core of which is rigidly connected to the gold 10 com dispensing apparatus 11 of working fluid. The device also contains a tank 12, a pump 13 and a reverse mechanism for changing the working length of the transverse steering rod (hydraulic cylinder) 14. Strain gauges 4, an electric bridge 7, a power supply 8, an electromagnetic coil 9 and a switchgear 11 form a control system for a reversing mechanism 14 for changing the working length of the transverse tie rod 15.

The outer rings 3 on the outer (with respect to the sleeve) ends have axial cuts 16. All rings 3 on the inner ends have axial protrusions 17 included in the axial cuts 18 of the bushings 2. Bearing clearance (inner race 19, rollers 20, outer race not shown) of the steered wheels is regulated by a nut 21 with a washer 22. The bushing 2 is fixed to the axle 5 of the steered wheels by a nut 23 with a washer 24. The lateral surfaces of the washers 24 have axial protrusions 25 that enter the cutouts 16 of the rings. In addition, the washers 24 in the holes have radial protrusions 26 installed in the axial grooves 6 of the axles 5 of the wheels.

The device also includes an electric signal amplifier 27.

The device operates as follows.

With the rectilinear movement of the car and the correct convergence of the steered wheels, the side reactions of the road to these wheels are absent, and the load cell resistances are equal to each other, therefore the voltage supplied from points C and D of the electric bridge 7 through the electric signal amplifier 27 to the electromagnetic coil 9 is zero and the spool 10 of the switchgear 11 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 3 will act on the load cells 4 and change their electrical resistance. In this case, a voltage appears between points C and D of the bridge 7, which is supplied through the amplifier of the electric signal 27 to the electromagnetic coil 9. The current in the coil 9 will cause a magnetic flux moving the core of the coil 9 and the spool 10 of the switchgear 11 left or right, providing a supply of working fluid from pump 13 into one or another cavity of the hydraulic cylinder (reversing mechanism) 14 of changing the working length of the transverse steering rod 15, thereby changing its length and providing the required toe-in of the wheels 1.

Thus, the proposed device for automatically controlling the convergence of the steered wheels of the car during movement ensures the correct position of the steered wheels under various driving conditions (acceleration, rolling, braking), which helps to reduce resistance to movement, tire wear and fuel consumption.

Claims (1)

A device for automatically controlling the convergence of steered wheels of a vehicle during movement, comprising steered wheels mounted through bearings mounted on bushings, on axles with rotary fists, bushings, rings and washers with nuts for their fastening on the axles, strain gauges mounted on the end surfaces of the rings, connected by a bridge circuit and which are sensors of the side reactions of the road, an electric power source, an electric signal amplifier, an electromagnetic coil, the core of which is rigidly connected to gold com of the distributor of the flow of the working fluid, a container with the working fluid, a pump and a reversing mechanism for changing the working length of the transverse steering link, characterized in that the outer rings on the outer (with respect to the sleeve) ends have axial cuts, the side surfaces of the mounting washers of the bushes and rings on wheel axles - axial protrusions that enter the cutouts of the rings; in addition, these washers in the holes have radial protrusions, and at the ends of the axles of the wheels there are axial grooves that include the radial protrusions of the washers; the bushings at the ends have axial cuts, and all rings on the inner ends have axial protrusions included in the cutouts of the bushings, which prevents turning of the bushings and rings with strain gauges, increasing the reliability of the structure.

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