RU2419001C1 - Driving middle clutch disk - Google Patents

Abstract

FIELD: machine building. ^ SUBSTANCE: clutch disk cast out of grey cast iron corresponds to ring with two pins arranged at 180. Four support surfaces are formed on external surface of the disk. The said support surfaces ensure a gap between the driving middle disk and internal boring of a flywheel. ^ EFFECT: increased service life of clutch disk. ^ 2 dwg

Description

The invention relates to the field of transmissions of armored vehicles and equipment, and in particular to clutch units.

A clutch assembly is known, which is a cruciform coupling, where the position of the middle and pressure plates with respect to the axis of rotation and the flywheel is determined by the fit of 4 spikes along the lateral surfaces of the 4 grooves of the flywheel. Clutch Model 14; 142 frictional, dry, double-disc with a peripheral arrangement of twisted pressure springs. The leading parts are the flywheel, pressure and middle discs. The middle and pressure drive discs are cast from special cast iron, on the outer surface of which four machined studs are made evenly spaced around the circumference, which enter the grooves in the cast iron flywheel, which facilitates the displacement of the discs in the axial direction and ensures the transmission of torque from the flywheel to the pressure disc (see. Vasilchenkov VF Military vehicles and tracked vehicles. Fundamentals of the chassis design, pp. 24-26. Rybinsk: Publication of JSC "RDP" 1996. Open edition. Prototype). This device is the closest to the proposed technical solution and is taken as a prototype.

However, the disadvantage of the prototype is that when transmitting torque from the engine flywheel to the gearbox input shaft, increased vibration, increased gaps, changes in the adjustments, axial displacement of the drive discs occur, which causes defects and failures. In the details of the clutch assembly, abrasion, fatigue failure of the surface layer, contact setting, cracks, chipping of the spikes of the drive discs, wrinkling and breaking of the flywheel grooves are observed. Also, there is a change of working surfaces of types to non-working in 2 groove-tongue couplings, and the transmission of torque occurs only through two spikes. And as a result, a decrease in the adhesion angle resource (see KamAZ Clutch Node Reliability Problems 14. Information note, pp. 1-5. Publication of OJSC KamAZ Scientific and Technical Center. Open Edition).

The objective of the invention is to develop a simple clutch assembly that provides reliable transmission of torque, increasing the reliability of the transmission and, as a result, ensuring and maintaining the mobility of armored vehicles and equipment.

The technical solution to the problem is to reduce wear, imbalance and ensure the technical resource of the clutch assembly and power unit.

The leading middle clutch disc is cast from gray cast iron, characterized in that it is a ring with two spikes located 180 degrees apart and supporting surfaces made on the outer surface of the leading middle clutch disc, with the possibility of transmitting torque through the pair of tongue and groove two diametrically opposite spikes. Moreover, on the outside, four supporting surfaces are created, which, after casting, are processed according to the template with a grinding machine, to a value of 24.56 mm. In this case, the supporting surfaces provide a gap of 0.2-0.3 mm per diameter between the leading middle disk and the inner flywheel bore. The surface of the studs is milled to a size of _59.72-0.06 mm. Then the leading middle clutch disc is mounted on the mandrel and balanced with an accuracy of at least 30 g × cm, drilled on the surface of the hole with a depth of not more than 10 mm with a distance between the centers of at least 19 mm.

The invention is illustrated in the drawing, which shows a General view of the leading middle clutch disc,

Where

1 - leading middle clutch disc;

2 - spikes;

3 - the outer surface of the leading middle disk;

4 - supporting surfaces;

5 - flywheel;

6 - flywheel grooves;

7 - the internal bore of the flywheel.

The leading middle clutch disc 1 is cast from gray cast iron and is a ring with two spikes 2 located after 180 degrees and supporting surfaces 4 made on the outer surface of the drive disc 3.

In contrast to the prototype, in order to increase the operational reliability of the clutch assembly, the center middle clutch disc 1 is centered due to four supporting surfaces 4 cast and located on the outer surface of the drive disc 3, along these surfaces the disc enters and is centered along the inner bore of the flywheel 7 with a clearance of 0, 2-0.3 mm. The created supporting surfaces 4 provide reliable alignment of the leading middle disk 1 and exclude its axial movement. Torque transmission occurs through the tongue-and-groove pairing with two diametrically opposite spikes 2, while the wear of the pairing does not affect the centering of the leading middle clutch disc 1, since the centering function has been removed from the tongue-groove joints.

When the clutch engages, the leading middle disk shifts toward the flywheel, enters the flywheel grooves along the supporting surfaces, the spikes of the leading middle clutch disk engage with two of the four flywheel grooves.

Unlike the prototype, the design of the leading middle clutch disc provides reliable transmission of torque, centering of the leading middle clutch disc relative to the flywheel, reducing the mass of the disc. This prevents axial displacement, reduces the effect of centrifugal force, causing the formation of an imbalance, contact seizure and, accordingly, premature failure.

An example of the operation of the device. When the clutch engages, the leading middle clutch disc 1, when a pressure disk (not shown) is applied to it along the supporting surfaces 4, moves to the end surface of the flywheel 5, presses the driven disk (not shown) and enters the flywheel 5 along its inner bore 7 with a clearance of 0, 2-0.3 mm. The transmission of torque from the flywheel 5 to the input shaft of the gearbox (not shown) takes place with two spikes 2 when engaged with two of the four grooves of the flywheel 6.

The use of the proposed leading middle clutch disc allows, firstly, to ensure reliable transmission of torque, secondly, to reduce wear, imbalance, and thirdly, to provide a technical resource. The use of a leading middle clutch disc of this design meets the requirements for clutch assemblies.

The design of the leading middle clutch disc ensures the reliability of the clutch assembly, reduces repair costs, the mass of the disc, saves the installed resource set by the manufacturer, and the after-repair resource. All this increases the reliability of the use of armored weapons and equipment, provides the main property - mobility.

Information sources

1. Vasilchenkov V.F. Military vehicles and tracked vehicles. Chassis Design Basics, pp. 24-26. Rybinsk: Publication of JSC "RDP" 1996. Prototype. Open edition.

2. Reliability problems of the KamAZ clutch assembly 14. Information reference. Naberezhnye Chelny: OJSC KamAZ Scientific and Technical Center Open publication.

Claims (2)

1. The leading middle clutch disc, cast from gray cast iron, characterized in that it is a ring with two spikes located after 180 degrees, and supporting surfaces made on the outer surface of the leading middle clutch disc, with the possibility of transmitting torque through mating spike the groove is two diametrically opposite spikes, and on the outer side create four supporting surfaces, which after casting are processed according to the template with a grinder to a value of 24.56 mm, while the supporting surfaces STI provide clearance 0.2-0.3 mm in average diameter between the master disk and the inner bore of the flywheel. 2. Drive clutch disc medium according to claim 1, characterized in that the surface of spines milled in size 59.72 _-0.06 mm, and then leading the average clutch disc is mounted on the mandrel and balance with an accuracy not less than 30 g · cm, drilled at the surface of the hole with a depth of not more than 10 mm with a distance between the centers of not less than 19 mm.