RU2697182C1 - Device for vehicle diagnostics - Google Patents

Abstract

FIELD: test equipment.

SUBSTANCE: invention relates to diagnostics and testing of transmission, suspension, steering and body. Proposed device comprises flange with holes for attachment to vehicle hub and flange-connected elements to support surface. Flange and elements providing support to surface are interfaced with possibility of relative rotation, which is provided by bearing. Circle, on which there are centers of holes on flange, its center can be shifted relative to axis of bearings rotation. Device can be made in the form of a wheel with a bus or a frame mounted on it, which may contain resilient elements. Frame may comprise rollers arranged to turn in horizontal plane.

EFFECT: simplification of the device, expansion of its technological capabilities.

6 cl, 5 dwg

Description

The invention relates primarily to the field of technical operation of vehicles and can be used, in particular, for the diagnosis and testing of transmissions, suspensions, steering and car bodies, road construction vehicles, wheeled tractors in enterprises related to the development, service and repair of the above equipment .

A known bench for power tests of a wheeled vehicle, in which a tire is used as a load device to create a load on the transmission and suspension of the test vehicle, whose axis is mounted with eccentricity with respect to the axis of the drum on which the vehicle wheel rests. [RU 2335753 C1, Bench for power tests of a wheeled vehicle. G01M 17/007 (2006.01) G01M 15/00 (2006.01), Bull. No. 28 dated 10/10/2008]

However, the design of this stand is complex and can only be used for stationary installation in a specialized area, it requires reliable fixation of the vehicle with additional structural elements - screeds.

There is a well-known stand for dynamic testing of vehicle power plants, where instead of a standard wheel, a flange is installed on the hub, with which you can remove the torque attributable to this wheel hub with a view to its subsequent change and measurement. [RU 2330257 C1, Stand for dynamic testing of vehicle power plants. IPC G01M 17/007 (2006.01) Bull. No. 21, dated July 27, 2008]

However, the design of this stand is complex and can only be used for stationary installation in a specialized area, cannot be used to create disturbing effects necessary for the diagnosis of suspension and steering. It requires separate supports, significantly distorting the load on the suspension of the vehicle compared with the support on a regular wheel.

The closest in technical essence and the achieved technical result is a device in the form of a stand for dynamic testing of power plants of vehicles. As a load device for creating a load on the engine, the transmission uses a disk brake mounted on the frame to which torque is transmitted through an adapter connected to the wheel hub of the car, and the frame transmitting force to the supporting surface is mounted on wheels providing the device's mobility and autonomy. [RU 97195 U1. The stand for dynamic tests of power plants of vehicles. IPC G01M 17/00 from 08/28/2010. Bull. No. 24]

However, the design of this stand is complex, does not have sufficient technological capabilities. It cannot be used to create vertical and horizontal disturbances necessary to check the suspension, steering and body elements of a vehicle, it does not provide the possibility of free, easy rotation of the hubs of the steered wheels during the diagnosis and when the transmission rotates with efforts commensurate with the forces during normal operation .

The basis of the invention is the technical task of simplifying the design of a device for diagnosing and expanding its technological capabilities in the diagnosis or testing of transmission, suspension, steering and wheel body mates, while ensuring that the steering wheels can rotate during operation of the device and create disturbing multidirectional effects.

To solve the problem in a vehicle diagnostic device containing a flange having holes for mounting on a vehicle’s wheel hub, the centers of which are arranged in a circle mounted for rotation by bearings on a frame on which a rolling element is mounted, which provides support to the surface, according to the invention, the rolling element, providing support on the surface is mounted to rotate in a horizontal plane, while the frame and the rolling element, providing The support resting on the surface is made in the form of a wheel equipped with an elastic element in the form of a tire or the rolling element providing support on the surface is made of at least two rollers mounted on the frame with the possibility of turning them in a horizontal plane, while the rolling element providing support to the surface, mounted on the frame by means of a flat spring, and to create vibrational effects on the car's systems, the circle on which the centers of the holes on the flange are located is shifted by its center (set lena with eccentricity) relative to the axis of rotation of the bearing ensures the possibility of rotation of the flange relative to the frame, wherein one of the openings in the flange, providing a mounting for a wheel hub, is circular, and the remaining openings have an arcuate shape with the arc center coinciding with the center circular hole.

The invention is illustrated by drawings:

In FIG. 1 (a, b) shows a device made in the form of a wheel containing a tire and its view with a cut along the axis of rotation.

In FIG. 2 shows a variant of the device having additional holes on the flange located in a circle, the center of which is offset from the axis of the bearings of the device.

In FIG. 3 (a, b) is a variant of the device in which the elements supporting the surface are made in the form of a frame on which an elastic element is fixed in the form of a flat spring with rollers fixed at its ends and can be rotated in a horizontal plane. On the flange, one of the holes that provides mounting on the wheel hub is made round, and the remaining holes have an arcuate shape with the center of the arcs coinciding with the center of the round hole.

The device consists of a flange 1 having holes 2 for mounting on the wheel hub of a vehicle. The flange is mated to elements 3 that support the surface by means of at least one bearing 4, which rotates the flange 1 relative to the elements 3 or two bearings 4, as shown in FIG. 3 (b). The flange can be made with holes 2 arranged in a circle with a center coinciding with the axis of the bearing 4, as shown, for example, in FIG. 1 or have holes located in a circle with a center having an eccentricity C relative to the axis of rotation of the bearing 4, as shown in FIG. 2. For a quick transition from operating modes with or without eccentricity, the flange may also have one round hole 7, and the remaining elliptical 6 as shown in FIG. 3a.

Elements 3 supporting the surface can be made in the form of a wheel with a tire 8, as shown in FIG. 1 (a, b), or a rigid frame, as shown in FIG. 3 (a, b). On the element 3, which performs the function of the frame and provides support on the surface, an elastic element 9 can be fixed in the form of a flat spring, providing a change in the distance from the axis of rotation of the bearings to the supporting surface under the action of a changing load and contain rollers 10 mounted for rotation in a horizontal plane, as shown in FIG. 3a, b.

Diagnostics or testing of a vehicle using an example of a car with a symmetrical cross-wheel differential is proposed to be carried out in the following sequence. The car is installed on the site (bearing surface) or inspection ditch and is fixed by the parking brake or stops. At least one full-time wheel on the drive axle is removed from the vehicle and the proposed device is installed instead of it by means of holes 2 and nuts (not shown in the figures). After the engine starts and the transmission is driven into rotation. The wheel hub together with the flange 1 of the device starts to rotate while the car remains stationary, since the elements providing support on the surface 3 are connected with the flange through the bearing (s) and the torque on the elements providing support on the surface is practically not transmitted. If the holes 2 for mounting the flange 1 on the wheel hub are located in a circle whose center coincides with the axis of rotation of the bearing (s) 4, then the wheel hub of the vehicle and device are coaxial and smooth rotation is observed without vibration and all elements can be diagnosed (in particular organoleptically) vehicle transmissions (wheel hub bearings, constant velocity joints, cardan gears, etc.). In this case, the hubs of the steered wheels can be rotated by the steering, which expands the possibilities of diagnosis, and a standard vehicle braking system can be used for short-term loading of the transmission with torque

If the device is installed in such a way that the axis of rotation of the bearings 4 is offset by an eccentricity C with respect to the axis of rotation of the wheel hub of the vehicle, for example, by displacing the center of the circle on which the holes for fastening on the wheel hub relative to the axis of the bearings of the device are located, as shown in FIG. 2 and FIG. 3a, oscillations will occur when the flange 1 rotates. These vibrations will create disturbing effects on the car's systems, which will make it possible to diagnose (in particular, organoleptically) the suspension, steering, body elements for the presence of backlash, noise and vibration characterizing malfunctions. This will also allow simulating the impact of road conditions on the above systems in order to assess their reliability.

The above procedures for the diagnosis of vehicle systems can also be performed when replacing all wheels on the drive axles with the proposed device.

The invention relates to the field of diagnostics and testing of wheeled vehicles, can be used in factories producing cars, wheeled tractors, road-building machines, as well as in the field of service and repair of the above equipment. Using the proposed device, without significant costs for stationary diagnostic equipment, it is possible to effectively diagnose mechanical systems of a car, the operability of which depends on the disturbing effect of road conditions on them. The device allows you to test the strength, durability of various components in stationary conditions instead of operational and reduce the costs of identifying malfunctions and fine-tuning new equipment.

Claims (6)

1. A device for diagnosing a vehicle, comprising a flange having holes for mounting on the wheel hub of the vehicle, the centers of which are located around the circumference, mounted for rotation with bearings on a frame on which a rolling element is mounted, providing support on a surface, characterized in that in order to expand its technological capabilities by ensuring the rotation of the device with minimal effort together with the hub of the steered wheel of the diagnosed car A rolling element providing support on the surface, is rotatably mounted in a horizontal plane. 2. The device according to p. 1, characterized in that in order to simplify the device, the frame and the rolling element, which provides support on the surface, are made in the form of a wheel equipped with an elastic element in the form of a tire. 3. The device according to p. 1, characterized in that the rolling element, which provides support on the surface, is made of at least two rollers mounted on the frame with the possibility of rotation in a horizontal plane. 4. The device according to paragraphs. 1, 3, characterized in that the rolling element, which provides support on the surface, is fixed to the frame by means of a flat spring. 5. The device according to claim 1, characterized in that in order to create vibrational effects on the vehicle systems, the circle on which the centers of the holes on the flange are located is shifted with its center relative to the axis of rotation of the bearings, allowing the flange to rotate relative to the frame. 6. The device according to paragraphs. 1, 3, characterized in that one of the holes on the flange, which provides fastening on the wheel hub, is made round, and the remaining holes have an arcuate shape with the center of the arcs coinciding with the center of the round hole.

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