Control device

FIELD: automotive industry.

SUBSTANCE: invention relates to mechanisms designed for simultaneously turning front and rear wheels. Proposed device consists of front wheels with steering shaft 5 and steering wheel 6 installed on frame of standard steering system. Bevel gear 7 installed in steering shaft 5 is in meshing with gear 8 of rear wheel control shaft 9. Crank-and-connecting rod mechanism is arranged on opposite end of shaft 9 whose output shaft 19 is arranged vertically, and steering lever 20 connected by tie-rods 21 with rear wheel turning levers 22 is secured on end of output shaft.

EFFECT: improved maneuverability of wheeled vehicles.

3 dwg

 

The invention relates to the field of transport and is designed to increase the mobility of wheeled vehicles, such as passenger cars, wheeled tractors, excavators, scrapers, etc.

Known devices for this purpose, containing gears with the internal toothed rack which is connected by the cracker with the toothed wheel with your finger (see the journal "Technology-youth for 1988, No. 8, 41).

However, these mechanisms are bulky, difficult to manufacture, contain wheels internal gears, progressive pair. Because of this, there is a long kinematic chain, in which there are gaps, causing spontaneous oscillations of the wheels.

From the technical literature of the known device management, consisting of rods, gears and crank mechanism (see "Mechanisms in modern engineering" BES, M., Nauka, 1971, str).

The closest technical solution is a control device consisting of a steering wheel, a steering shaft with a steering mechanism, steering levers and rods connected with the levers swivel pins steered wheels (see "Chassis", part II "Steering" Irinel, M., "engineering", 1987, p.72). The specified device has limited controllability, great turning radius. It does not provide the required maneuverability DL the road vehicles (scraper, excavators) and for cars when Parking at limited sites.

The technical solution of this invention is to improve the maneuverability of the vehicle and the ability to install the control unit on the standard steering gear series production vehicles.

A technical solution is achieved in that in the lower part of the steering shaft before the control mechanism is a bevel gear, which is connected with the driven bevel gear of larger diameter mounted on the steering shaft of the rear steering wheels, and at the opposite end thereof is fixed a crank mechanism, an output shaft which is vertical, and at the end of his fixed rotary lever, connected by rods to the levers of rotation of the rear wheels.

The invention is illustrated by drawings.

Figure 1 shows schematically the control device of the vehicle when viewed from the side.

Figure 2 shows a General view of the device management

Figure 3 shows the ratio of the swivel arms of the crank mechanism and the rear wheels.

The control unit is implemented as follows. The control unit and all its components are mounted on the frame 1 of the vehicle (car etc), which has the front 2 and rear 3-driven wheels. On the frame of the car grip the EN control mechanism 4 (worm or rack type), on the upper end of the steering shaft 5 is fixed steering wheel 6. At the lower end of the steering shaft before control mechanism mounted bevel gear 7, which is engaged with the bevel gear 8 mounted on the front end of the steering shaft 9 of the rear wheels. Both gears are enclosed in a common housing. In figure 2 it is shown by a dotted line. The steering shaft of the rear wheels equipped with cardan joint 10 and its rear end mounted in the bearing 11 mounted on the vehicle frame.

The control device of the front wheels made standard without changing its components. The control device of the front wheels has a steering lever 12 rod 13 and the swing arms 14 of the front wheels.

Driven gear 7 and the leading gear 8 of the steering shaft 9 of the rear wheels have a gear ratio of 3 or more. Bevel wheel 8 is three times larger in diameter and in the same time a greater number of teeth.

A pair of bevel gears 7 and 8 is conical reducer and they are enclosed in a common housing.

On the rear end of the steering shaft 9 has an angular crank mechanism having a crank 15 and the rod 16 mounted in the bearing 17 of the crank angle ∝. The opposite end of the connecting rod bearing 18 mounted on a vertical shaft 19 of the crank mechanism. On the vertical shaft 19 in its lower end for the Sol rotary lever 20 of the rear wheels. The lever 20 rods 21 connected with the levers 22 of rotation of the rear wheels. The levers rotate the rear wheels are located on the pivot pins 23 mounted on the rear axle of the vehicle by means of vertical hinges 24. The device tie rods, swivel levers, axles and wheel studs is a typical and commercially available for a specific vehicle class. A crank mechanism is installed in the General case. In figure 2 it is shown by a dotted line.

The rotary lever 20 has a greater length than the lever 22 to rotate the rear wheels. The length of the lever 20 is more than 1.2 times the length of the lever 22 of rotation of the wheels, as shown in Figure 3.

The gear ratio of the steering mechanism of the front wheels (the worm pair, the control mechanism 14 is typical and standard for each vehicle type. The total gear ratio of bevel pairs 7 and 8, the crank mechanism and controls of the rear wheels is less than or equal to the transmission number of the control mechanism of the front wheels of the vehicle, which is installed on the proposed control device.

The control unit operates as follows. When turning the steering wheel the steering shaft 6 rotates in the direction of rotation of the steering wheel and using the control mechanism 4, the lever 12, rod 13 and the pivot levers 14 powerchip the Ute front wheels 2 of the vehicle in the direction of rotation of the steering wheel. Rotation of the steering shaft 4 through a pair of conical gears (7, 8), the steering shaft 9 of the rear wheels and a crank mechanism with levers 20 and 22 causes rotation of the rear wheels in the opposite direction. Since the gear ratio of the steering mechanism of the front wheels is equal to the total transmission number of the steering mechanism of the rear wheels (or more), the rear wheels turn at the same angle as the front wheels (or less than).

While turning the front and rear wheels in the opposite direction increases vehicle stability when cornering. In addition, increased maneuverability, especially at low speed at limited sites. This is necessary in the Parking lot, when the excavator, grader, scraper limited to construction sites.

The described kinematic scheme eliminates the internal gearing in the control mechanism with a reduced number of links of the kinematic chain, increases the rigidity of the control device.

Compared with the prototype of the proposed control device has a low weight, small dimensions. The body of the crank mechanism has dimensions of 100×100×150 mm And it easily fits into the dimensions of a standard control mechanism 4.

The proposed control device is of a simple and reliable in operation compared to the prototype.

The control device of a vehicle, comprising mounted on its frame steered wheels connected by rods with their control mechanism having a steering wheel and steering shaft, characterized in that the lower part of the steering shaft before the control mechanism is a bevel gear, which is connected with the driven bevel gear of larger diameter mounted on the steering shaft of the rear steering wheels, and at the opposite end thereof is fixed a crank mechanism, an output shaft which is vertical, and at the end of his fixed rotary lever, connected by rods to the levers of rotation of the rear wheels.



 

Same patents:

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FIELD: transport engineering; wheeled vehicles.

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Control device // 2271955

FIELD: automotive industry.

SUBSTANCE: invention relates to mechanisms designed for simultaneously turning front and rear wheels. Proposed device consists of front wheels with steering shaft 5 and steering wheel 6 installed on frame of standard steering system. Bevel gear 7 installed in steering shaft 5 is in meshing with gear 8 of rear wheel control shaft 9. Crank-and-connecting rod mechanism is arranged on opposite end of shaft 9 whose output shaft 19 is arranged vertically, and steering lever 20 connected by tie-rods 21 with rear wheel turning levers 22 is secured on end of output shaft.

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2 dwg

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2 cl, 3 dwg

FIELD: transport.

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2 cl, 3 dwg

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8 cl, 4 dwg

FIELD: machine engineering.

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Control device // 2271955

FIELD: automotive industry.

SUBSTANCE: invention relates to mechanisms designed for simultaneously turning front and rear wheels. Proposed device consists of front wheels with steering shaft 5 and steering wheel 6 installed on frame of standard steering system. Bevel gear 7 installed in steering shaft 5 is in meshing with gear 8 of rear wheel control shaft 9. Crank-and-connecting rod mechanism is arranged on opposite end of shaft 9 whose output shaft 19 is arranged vertically, and steering lever 20 connected by tie-rods 21 with rear wheel turning levers 22 is secured on end of output shaft.

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