MX2009006946A - Electric vehicle with two rotatable and motive front wheels, and rotating intervals of 180°. - Google Patents

Abstract

A four-wheel terrestrial automotive vehicle that includes a driving system with a rotating interval of 180° (90° to the right and 90° to the left), a platform supported over the two rear wheels that strictly acts as rolling supports, and two front wheels combining the driving a rotating functions. The two engines are controlled by controllers and these latter elements are simultaneously actuated by the signal of a potentiometer pedal. The present invention does not require a mechanical differential, which is a heavy and expensive element. The dual driving system, which includes the controllers, acts as an electronic differential. The vehicle includes a device for attenuating the oscillations of the front wheels, and an electro-hydraulic system for assisting the direction control.

Description

ELECTRIC VEHICLE WITH TWO DRIVE AND VIRABLE FRONT WHEELS AND 180 ° TURNING INTERVAL FIELD OF THE INVENTION Terrestrial automotive vehicle BACKGROUND OF THE INVENTION In the last decades of the twentieth century there was great interest, particularly in the United States, in the four-wheel turn system (4 vehicles have been built to incorporate it.) This is due to the low speed maneuverability (with the front wheels in push-pull mode) and to improve the control and stability (with the front and rear wheels turning in a-mode with 4RV vehicles is the excessive angular sweeping of the BAPT results because the center of turn is in front of the vehicle. This problem is so serious that some of these vehicles in The relevant work of this invention is the work of Kato pment of a medium duty truck with a mechanical linkage type fo system. "SAE Transactions, Vol. 99, No. 2, 1990, pp. 870-876, i medium-sized 4RV truck, With three modes of turning developed in response to demand from its clientele, it is a maneuverable to operate on narrow streets.The wheels in front t each side (total interval of 98 °), while the rear wheels turn [o ( total range of 60 °.) It is notable that the turning angle of l is less than that of the front precisely to limit the BAP o Work reports a considerable reduction in the minimum radius of sation to that of conventional 2RV vehicles, and therefore a reduction in the number of maneuvers and in the required time. However, it is noted that the BAPT problem allows the cantilever rear sweep to increase relative to a conventional vehicle. nplo is the one described in: "Automotive Tech, Best of what's n approximately) and 90 ° of turning, this is hardly possible. In addition, in this case, the excessive BAPT could result In agricultural tractors and lawn mowers there is a 180 ° swivel system which, unlike the system presented, is used in vehicles with rear-wheel drive, and requires that the rear wheels rotate in opposite directions around its axis for 90 ° . This, of course, requires more mechanical complication. US Patents: 6325296, 69261 1 1, 6951259, 7044244 and 7237629 there are steering mechanisms with a 180 ° turn interval with eccentric slugs, see US Patents: 69261 1 1, 6951259, US Pat. Nos .: 7237629; with rack and eccentric gears US: 291 exclusively US links: 6325396; but all these meca in combination with the rear traction and for application in s and lawn mowers.

Mind remember that there are narrow streets not only in Asian cities , the characteristic BAPT of the 4RV vehicles is inconvenient and arto in narrow streets. note that, in addition to the convenience of the maneuver itself that can be saved has as a consequence a greater than in an electric vehicle, and would result in a fuel saving m of the pollution in a gasoline vehicle. and to clarify that in all the vehicles the BAPT is presented, per se, as well as in the vehicle of the present inveis almost imperceptible, reason why it is not considered that cons a.

It is the object of the present invention to provide a vehicle with a steering mechanism capable of steering with an interval of 3 on the right and 90 ° on the left.

The purpose of the invention is that the mentioned Ackerman ometry steering mechanism.

Another purpose of this invention is to provide a steering system with a unique operating mode.

It is an object of the invention to provide a steering system 180 ° cornering range, combined with a dual system to eliminate the mechanical differential.

It is the object of the invention to provide a device that attenuates the oscillation of the front wheels. more than said device is to move the damper away from the direction of some parts of the steering mechanism itself.

BRIEF DESCRIPTION OF THE DRAWINGS a 1 is a scheme of the general concept and includes the subject systems. ra 5 is a scheme of a device that attenuates the oscillation of the front wheels. to 6 is a photograph of a prototype of the invention. ra 7 is a photograph of the front of the prototype that a contraphasic oscillation attenuator, in sea position ra 8 is a diagram of the oscillation attenuator device, in forward po. ra 9 is a photograph of the front of the prototype that ivo oscillation attenuator, in position of 90 ° turn to the left ra 10 is a diagram of the oscillation attenuator device, at 90 ° to the left.

If a conventional steering mechanism with a t interval of 180 ° would result in unviable configurations, for example extreme of return to 90 ° the transmission angle would be d and, therefore, the transmission torque would also be objectionably invention, The angular displacement of the mechanism itself is within reasonable limits even though the wheels are turned to the large, thanks to the introduction of displacement amplifiers mechanism and wheels. portions of the links of the steering mechanism and the ation are established to obtain a turning interval of 180 ° and 90 ° to the left) by an optimization in the computation to the error with respect to the Turning Law (Ackermons geometry of the Turning mechanism were determined by a pro ion to comply with the Turning Law, leaving the maximum error described in the following two publications: (1) Chicurel, E., and Turning Came with interval of 180 ° for a vehicle of 4 wheels " of the address.

Address 200 consists of the control set, the mecha as well as the amplifiers, Figure 3, and the elements that The control unit is illustrated in Figure 3 and consists of the steering wheel 1, the f, the universal joint 3 and the gearbox 4. The mechanism of the installation by the Pitman arm 5, the arm 6, the transver bar, and the output links 9. The amplifiers are made up of 10 and the pinions 1 1, but they could be integrated by toothed belt transmissions (see next paragraph). The elements that veer 1 1 and the turning arrows 12. In FIG. 4, the staves, the tilting arms 14 and the front wheels 15 are illustrated.

If the amplifiers were chain or toothed band in the turn of the wheels, it would be necessary to compensate n in the gearbox 4. is of turn 13 and turn with them, Figure 4. The turning frames to the propulsion units, 16 to 18, including the wheels of conventional vehicles, the whole mechanism is part of the suspended mass (damped) . of propulsion. propulsion 200-b, Figure 4, consists of two units, gives by a controller that is not shown, an electric motor 16, a high speed 17, a low speed chain reducer Ores 16 are governed by both controllers and these, at their os by the signal of a potentiometer pedal. The controllers feed the motors. Because of its characteristics, the engines are speed change boxes. The controllers, and the propulsion dua, act as an electronic differential and, therefore, the mechanical differential. The transmission of the angular velocity of the s of turn 13. Each front suspension, not shown, with elicoidal and a shock absorber anchored at one end to the end frame to the swing arm 14. ivo attenuator of push-pull oscillations. a damper for restricting, at a tolerable level, the oscillations of the turning frames 13. It is such that the said tiguador frame is anchored directly thereon, the owner himself with said sweep. To avoid such interference a di > r 300, Figure 5, which comprises a crossbar mechanism which is mounted on a shock absorber 24. is composed of four articulated bars: two lateral bars? crossed in the shape of "X". The damper 24 is mounted not by the joints 25. The MBC is anchored in the b by the posts of the joints 26. During a turn, lores causes the posts of the joints 26 to be separated, ional. Seen in another way, the relative displacement, which is of turning occurs when turning, is transmitted to the master and the MBC, which acts as a reducer, in such a way that the master in the MBC itself operates within its range of permisib extension Ion of the vehicle, in forward motion, is illustrated in the Figur photography and with a scheme of the top view. The rectangles a s Figures 8 and 10 represent the horizontal sections of the cane the height of the shock absorber 24. The position of the maximum possible turn Figure 9 and 10.

Claims (1)

1. CLAIMS or described the present invention, this is considered a novelty \ claim as property contained in the following clauses: a four-wheeled earthshift, with two-wheel drive, because it is made up of: a steering system with a 180 ° angle, a propulsion system and supporting elements; The engine is a chassis, two rear wheels that act as steering support brackets that includes two amplifiers of turn displacements coupled to said amplifiers located in the vehicle, on which are mounted two units of each engine. electric, one or more gearboxes with its corresponding individual suspension, in addition, cessivo that attenuates the oscillations in contraphase of the driving wheels. terrestrial four-wheeled vehicle, with two-wheel drive d rmidad with claim 1, characterized in that the proportion of address of the de lazamie amlificators the speed reducers and the oscillating attenuator device by the suspension system. A four-wheeled vehicle with two-wheel drive is required by claim 1, characterized in that the system of a control assembly consisting of a flywheel, a globe, and a hydraulic servomechanism including a pump vehicle with four wheels, with two-wheel drive d rmidad with claim 4, characterized in that the pump a by means of an electric motor. a four-wheeled vehicle with two-wheel drive d rmity with claim 4, characterized in that the servo co controls the passage of the oil to drive, in one direction or another, itself that transfers the steering wheel to the Pitman arm. A four-wheeled ground vehicle with two-wheel drive d rmity with claim 6, characterized in that the Pit arm is augmented by the assistance of the hydraulic servomechanism. a four-wheeled vehicle with two-wheel drive d rmity with claim 8, characterized in that the mechanism converts the angular movement of the Pitman arm in the displacements 5S input to the two amplifiers. Four-wheel land vehicle, with two-wheel drive d iformity with claim 9, characterized in that angular impressions are different from each other. terrestrial four-wheeled vehicle, with two-wheel drive, dependence with claim 1, characterized in that the angular amplifications are constituted by gears. Four-wheel land vehicle, with two-wheel drive d rmidad with claim 1, characterized in that the angular amplifications are constituted by chain transmissions. four-wheeled land vehicle, with two-wheel drive d rmidad with the claim 1 characterized or ue lo a li terrestrial vehicle of four wheels, with traction on two wheels of rmidad with the claim 14, characterized in that the poten simultaneously the control voltage to each of the controlled four-wheeled land vehicle, with traction on the two wheels of ormity with claim 15, characterized in that the proportional controls identical to each of the motors. : four-wheeled land vehicle, with traction on two wheels of rmidad with claim 1, characterized in that the chassis is e > in the front part. A four-wheeled vehicle with two-wheel drive resides with claim 17, characterized in that the bifurcators are individually supported, each in a turning frame. vehicle with four wheels, with traction on two wheels d irmidad with claim 1, characterized in that each one month front is constituted by a swing arm a terrestrial four-wheeled vehicle, with traction on two wheels d rmidad with claim 20, characterized in that the cushions that intersect in the form of "X", are articulated to the two bars later Four-wheeled land vehicle, with two-wheel drive duality with claim 1, characterized in that the counter-phasing oscillation of the drive wheels is mounted ions in the turn frames and interconnects with each other.