RU2410270C1 - Device for continuous automatic controlled wheels toe-in control in motion - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: proposed device comprises controlled wheels, sleeves, strain gages, axles with rotary cams, 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 connected in bridge circuit with power supply and electromagnetic coil to make road lateral response transducers. Electromagnetic coil core is rigidly coupled with working fluid control vale spool communicated with working fluid tank, pump and hydraulic cylinder of reversing mechanism intended for varying the length of transverse pitman lever. Said rings have angular lateral cutouts arranged regularly all along the circumference. Said strain gages are arranged on face surfaces of the rings between said lateral cutouts and interconnected.

EFFECT: higher reliability, sensitivity and accuracy of control in motion.

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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 in the process of movement.

A device for automatically controlling the convergence of the steered wheels in the process of driving, comprising 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 by 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 with 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 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 disadvantages of this device are: insufficient sensitivity and accuracy without amplification of the electric signal from the sensors of the side reactions of the road, and with the amplifier - the complexity of the design, reduced reliability and the cost of electric energy for the amplifier.

The technical result of the proposed device for automatically controlling the convergence of the steered wheels of the car during movement is to increase the sensitivity and accuracy, simplify the design, reduce the cost and operating costs, 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, sensors of side reactions of the road, power supply, electromagnetic coil, switchgear, reservoir with working fluid, pump, transverse thrust with reversing mechanism m, the rings have three equally spaced equal lateral sections, and the load cells are installed on the end surfaces of the rings between these sections and are connected to each other, which increases the design sensitivity, accuracy and eliminates the electric signal amplifier.

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 side slices 4, located at an angle of 60 ° to each other, on axles 5. Strain gauges (electric sensors of side reactions of the road) 6 are fixed to the end the surfaces of the rings 3 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 supply 8, and points C and D are connected to the electromagnetic coil 9, the core of which is rigidly connected to the spool 10 m dispenser 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 gages 6, 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 clearance in the bearings (inner race 16, rollers 17, outer race not shown) of the steered wheels is regulated by a nut 18 with a washer 19. The sleeve 2 is fixed to the axle 5 of the steered wheels by a nut 20 with a washer 21.

The device operates as follows.

With the rectilinear movement of the car and the correct convergence of the steered wheels, there are no side reactions of the road to these wheels, and the load cell resistances are equal to each other, therefore the voltage supplied from points C and D of the electric bridge 7 to the electromagnetic coil 9 is zero and the spool 10 of the switchgear 11 is in the central (neutral) position.

When the convergence to the positive or negative side is deviated, the steered wheels 1 due to side reactions of the road through the bushings 2 and rings 3 will act on the load cells 6 and change their electrical resistance. In this case, a voltage is applied between points C and D of the bridge 7 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 the pump 13 to either another cavity of the hydraulic cylinder (reversing mechanism) 14 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 a car during movement increases sensitivity and accuracy, simplifies the design, increases reliability, reduces the cost and operating costs of the device, and ensures the correct position of steered wheels under various driving conditions (acceleration, coasting, 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 electromagnetic coil, the core of which is rigidly connected to the spool of the switchgear working fluid flow, a reservoir with working fluid, a pump and a reverse mechanism for changing the working length of the transverse steering link, characterized in that the rings have three equally spaced side sections, and the load cells are installed on the end surfaces of the rings between these sections and are connected to each other.

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