RU2785801C1 - Device for control of radial runout of crankshaft main journals - Google Patents

Abstract

FIELD: control and measuring equipment.

SUBSTANCE: invention relates to control and measuring equipment of machine-building and repair and maintenance enterprises, in particular for control of radial runout of crankshaft main journals. A device for control of radial runout of crankshaft main journals contains a frame, two roller prisms with an installed crankshaft, guide rollers for prisms, and an indicator on a stand, while it has a measuring plate located on the frame, a linear electric engine, a friction rubberized disc, a gearbox motor, a low plate installed on the frame, a pneumatic cylinder, while a stationary roller prism, the indicator on the stand, and guide rollers with a movable roller prism and the linear electric engine are located on the measuring plate, and the gearbox motor is located on the low plate, connected to the friction rubberized disc via a belt drive, wherein the pneumatic cylinder is installed between the low plate and the frame for provision of a possibility of rotation of the low plate.

EFFECT: reduction in time during reinstallation of prisms in case of measurement of different crankshafts, possibility of control of radial runout of any journals relatively to each other, and elimination of manual turnaround of the crankshaft, when measuring runout.

1 cl, 4 dwg

Description

The present invention relates to instrumentation in machine-building and repair and maintenance enterprises, in particular to control the radial runout of the crankshaft main journals.

After the manufacture or restoration of the crankshaft, the radial runout of the main journals of the crankshaft relative to each other is monitored.

A device is known for monitoring the radial runout of the main journals of the crankshaft [URL: https://www.automnl.com/model/vw_sharan/82/, date of uploading to the electronic environment 06/25/2011], when the shaft is installed in the centers of the lathe and the indicator on a tripod, the beating of the necks is checked when cranking the crankshaft.

However, due to the fact that in the engine block the crankshaft is mounted on the main journals, and the measurement is made relative to the center holes of the shaft, there may be radial runout of the journals relative to each other due to the difference in base surfaces during measurement and operation.

A device is known for monitoring the radial runout of the main journals of the crankshaft [URL: https://juke2.ru/html/dbts.html, date of uploading to the electronic environment 08/15/2020], when the shaft is installed with two main journals on V-shaped measuring prisms, previously located on the marking plate, and the indicator on the tripod checks the radial runout of the journals when turning the crankshaft.

However, this measurement method requires time for preliminary precise installation of prisms, and in the case of measuring different shafts or radial runout relative to different journals of heavy long multi-bearing crankshafts, the time for reinstalling and realigning the prisms and manually turning heavy shafts increases significantly.

Closest to the invention in terms of technical essence and the achieved result is a device for monitoring the radial runout of the crankshaft main journals, containing a frame, two roller prisms with an installed crankshaft, guides for the prisms and an indicator on a tripod [URL: https://dizel-truck. ru/remont/kolenvalyi/, date of uploading to the electronic environment 12/27/2017].

However, in the case of measuring different shafts or radial runout relative to different journals of heavy long multi-bearing crankshafts, the time for reinstalling and realigning the prisms and indicator on a tripod increases.

The technical result is a significant reduction in time when reinstalling the prisms in the case of measuring different crankshafts, the ability to control the radial runout of any journals relative to each other and the elimination of manual rotation of the crankshaft when measuring the runout.

The technical result is achieved by the fact that in the device for monitoring the radial runout of the main journals of the crankshaft, containing a frame, two roller prisms with an installed crankshaft, guides for the prisms and an indicator on a tripod, according to the invention, has a measuring plate located on the frame, a linear motor, rubberized friction disk, motor-reducer, small plate mounted on the frame, pneumatic cylinder, while on the measuring plate there is a fixed roller prism, an indicator on a stand and guides with a movable roller prism and a linear electric motor, and on the small plate there is a motor-reducer connected a belt drive with a friction rubberized disk, and to ensure the possibility of turning the small plate between it and the frame, a pneumatic cylinder is installed.

The novelty of the proposed proposal lies in the fact that the rapid movement of a movable prism using a linear electric motor will allow you to place a crankshaft of any length in the fixture on any two main journals without additional regulation, and the friction disk, pressed against the neck by a pneumatic cylinder to provide the necessary force, with the help of a motor The gearbox will allow you to rotate the crankshaft when measuring at the required speed.

The essence of the invention is illustrated by drawings, which show:

in fig. 1 - device for monitoring the radial runout of the main journals of the crankshaft;

in fig. 2 - the same: top view;

in fig. 3 - the same: side view before installing the crankshaft;

in fig. 4 - the same: side view during the control of the radial runout of the crankshaft journals.

To control the radial runout of the main journals of the crankshaft, a device is used that contains a frame 1, to which a measuring plate 2 is attached with guides 3 installed on it with a linear electric motor 4 and a movable roller prism 5, a fixed roller prism 6. Roller prisms 5 and 6 are equipped with crankshaft 16. A small plate 7 is installed on the frame 1 with a motor-reducer 8 mounted on it, connected by a belt drive 9 through pulleys 10 and 11 with a friction rubber-coated disk 12. The small plate 7 can swing around the horizontal axis 13 with the help of a pneumatic cylinder 14 A tripod with a measuring indicator 15 is installed on the stove.

The control of the radial runout of the crankshaft main journals is carried out as follows.

Before carrying out the control operation, the movable prism 5 is installed with the help of a linear electric motor 4 at the required distance from the fixed prism 6 (Fig. 1), taking into account the dimensions between the base journals of the crankshaft being checked, on which the crankshaft 16 is subsequently installed. The rod of the pneumatic cylinder 14 is extended (Fig. 4), the friction disk 12 is in its uppermost position and does not interfere with the installation of the shaft both manually and with the help of a lifting mechanism.

The crankshaft to be checked is installed with the necessary journals on the prisms 5 and 6 (Fig. 1, 4), air is supplied to the pneumatic cylinder 14, the rod lowers the small plate 7, which rotates around the axis 13, and the friction disk 12 is pressed against the crankshaft journal 16 (Fig. 3), lying on a fixed prism 6. The indicator leg 15 is installed on the checked neck (Fig. 1), the gear motor 8 is started, which, through the pulleys 10 and 11 of the belt drive 9, transmits rotation to the rubberized friction disk 12. The disk 12 (Fig. 3), rotating, with the help of the pneumatic cylinder 14 ensures that the neck of the crankshaft 16 is pressed against the rollers of the fixed prism 6 and the rotation of the crankshaft, during which you can take readings from the measuring indicator 15. After measuring the runout of one neck, stop the gear motor 8, move the indicator 15 to the next neck, turn on the gear motor 8 and take measurements. If necessary, you can stop the motor-reducer 8, use the pneumatic cylinder 14 to remove the friction disk 12 from the crankshaft journal, and reinstall it on other journals.

Claims (1)

A device for monitoring the radial runout of the main journals of the crankshaft, containing a frame, two roller prisms with an installed crankshaft, guides for the prisms and an indicator on a stand, characterized in that it has a measuring plate located on the frame, a linear electric motor, a friction rubberized disk, a motor- a gearbox, a small plate mounted on the frame, a pneumatic cylinder, while on the measuring plate there is a fixed roller prism, an indicator on a tripod and guides with a movable roller prism and a linear electric motor, and on the small plate there is a gear motor connected by a belt drive with a friction rubberized disk , and to ensure the possibility of rotation of the small plate between it and the frame, a pneumatic cylinder is installed.

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