RU178600U1 - Power take-off - Google Patents

Abstract

A power take-off mechanism, the shaft of which is a pinion shaft (3), and the slots at the end of the shaft serve as an element for transmitting torque to the actuator, while the slots to exclude self-switching are made with a thickness varying in length and with a radial chamfer on the outer end, which ensures lightness and noiselessness of switching on, and an additional cover (6) was introduced, hermetically closing the housing from the side of the splined end of the pinion shaft (3), which made it possible to create a simple and reliable power take-off mechanism that can be easily mounted on a motor barely internal combustion and dismountable. The power of this mechanism is selected from the gear of the gas distribution mechanism (timing) of the internal combustion engine (ICE). In this case, the power taken does not depend on the inclusion of gear in the gearbox and can be realized immediately after starting the engine.

Description

The proposed power take-off refers to the field of transport engineering, in particular to power take-offs from internal combustion engines to various equipment and actuators requiring transmission of up to 100% of engine power.

Known power take-off (KOM) from the engine, installed in the flywheel housing and providing power take-off from the crankshaft of an internal combustion engine. The device comprises a crankshaft gear mounted between the crankshaft end and the flywheel, an intermediate gear engaged with the gear and rotatably mounted on an axis, a gear shaft that is engaged with the intermediate gear and which can be connected to the working mechanism of an industrial machine . An intermediate gear is mounted on an axis through roller bearings and a support sleeve. The support sleeve is made with a flat, which, when installed, it enters the counter cavity of the flywheel housing, which eliminates the rotation of the sleeve around the axis. To improve lubrication and the passage of lubricant through the bearings, a groove is provided in the sleeve on the inner surface and a through radial hole matching the through radial hole of the axis. The pinion shaft is mounted on two roller tapered bearings. On the one hand, it has a gear rim that engages with the intermediate gear, and on the other hand it has a threaded part, a spline connection and a groove (see Utility Model Patent No. 130259, published July 20, 2013).

The disadvantage of this solution is that the design is complex, consists of a large number of parts, large dimensions, large mass, limited layout capabilities and a laborious assembly process.

The closest set of essential features is the power take-off mechanism, consisting of a body part and a shaft installed in it, made at the same time with the power take-off flange and at the other end of which the drive gear is fixed (See patent DE 4214799, Fig. 2, published 11.11.1993 g.).

The disadvantages of this design are the complexity of the design, expressed in that the drive gear is mounted on the shaft on a conical surface, in this case, the centering of the gear is impaired and it is impossible to maintain axial clearance when tightening the nut; in addition, the shaft needs to be sealed on the flange side.

The task was set - to create a simpler and more reliable power take-off mechanism, easily mounted and dismounted.

The problem is solved due to the fact that in the power take-off mechanism, consisting of a housing, a shaft with a drive gear and an element for transmitting torque, the drive gear is integral with the shaft, and the splines on the shaft end serve as an element for transmitting torque Slots to exclude self-switching are made with a thickness that is variable in length and with a radial chamfer on the outer end, to ensure lightness and noiseless switching. In addition, a cover was additionally introduced, which hermetically seals the housing from the side of the splined end of the shaft in the case when there is no need for power take-off.

The combination of distinctive features, namely, that the drive gear is integral with the shaft, and the slots at the end of the shaft serve as an element for transmitting torque, while the slots to exclude self-switching are made with a thickness that is variable in length and with a radius bevel on the outer end, which provides ease and noiselessness of inclusion and an additional cover is introduced, hermetically closing the housing from the side of the splined end of the shaft, which allowed creating a simple and reliable power take-off mechanism that can be easily mounted on vigatele combustion and dismountable.

Power in this case is taken from the gear of the gas distribution mechanism (GRM) of the internal combustion engine (ICE). In this case, the power taken does not depend on the inclusion of gear in the gearbox and can be realized immediately after starting the engine.

In addition, it provides the connection and disconnection of actuators to the flow of power from the internal combustion engine both in the parking lot and when the vehicle is in motion.

If there is no need for power take-off, a cover is installed that covers the splined end of the shaft to ensure tightness of the timing case cavity.

The applicant does not know the power take-off mechanism with the indicated combination of essential features and the claimed combination of essential features does not follow explicitly from the current state of the art, which suggests the conformity of the claimed technical solution to the “novelty” condition.

The utility model is illustrated by drawings, on which:

FIG. 1 - Power take-off mechanism view from the side of the ICE flywheel;

FIG. 2 - Section AA in FIG. one;

FIG. 3 - Section BB in FIG. one;

FIG. 4 - Remote element C in FIG. 3;

FIG. 5 - Remote element U in FIG. 2.

The power take-off mechanism contains a bearing housing 1, bushings 2 are installed in it, which play the role of sliding bearings, in which a shaft-gear 3 is installed, through which power is transmitted from the engine timing mechanism, a thrust ring 4 to prevent axial displacements of the shaft-gear 3, nut 5 fixes the shaft - gear 3 in the bearing housing 1, together with the mounted thrust rings 4 forming a package of parts ready for installation on the engine flywheel housing.

Nut 5 serves to prevent axial displacements of the shaft - gear 3 and performs two functions: the nut itself and the end bearing. The end face of the nut 5, working in a pair of friction, has a hardness of up to 62 HRC, and the opposite end is made with normal hardness and has a belt for locking. The main locking is due to the tightening torque, axial clearance is ensured by the dimensional chain.

The power take-off mechanism is closed by a cover 6 to avoid oil leakage during operation of the internal combustion engine without additional actuators. To ensure 100% tightness of the power take-off mechanism on the cover 6, two grooves 7 and 8 were made for installing sealing rings in them (see Fig. 2).

Holes 9 are made in the bearing housing 1 to ensure oil supply to the bushings 2 and the shaft - gear 3 to prevent oil starvation and wear of the shaft - gears 3 and bushings 2. There are also four holes 10 on the bearing housing 1, which prevents the thrust rings 4 from turning , thereby increasing their service life. The groove 11 serves to install a sealing ring in it so that there are no oil leaks. The surface 12 plays an important role, it provides centering of the bearing housing 1 in the crankcase of the engine flywheel (see Fig. 3).

The persistent ring 4 has a bend 13 to prevent rotation, this bend clings to the hole 10 in the bearing housing 1. There are also grooves 14 through which oil flows to lubricate the bushings 2 and the gear shaft 3 (see Fig. 4). Thanks to these grooves 14, the oil flows back into the internal combustion engine and oil stagnation is not formed. In order to increase the service life of the thrust ring 4, special spraying of the minimum thickness is applied, as a result of which the friction force between the shaft end - gear 3 and nut 5 is reduced (see Fig. 5).

A window is provided in the body of the power take-off mechanism from the side of the shaft splines - gears 3, which allows you to set various options for actuators. To do this, remove the cover 6. The slots have different thicknesses along the length, which excludes self-switching off, and the slots also have a radius chamfer at the outer end, for smooth and silent switching on and reduction of switching forces. The result is reliable and comfortable controls.

The lubrication system works as follows: the oil from the internal combustion engine lubrication system is supplied under pressure to the hole 9 made in the bearing housing 1 and lubricates the bushings 2 and the gear shaft 3 and then flows through the grooves 14 into the engine crankcase.

Claims (1)

A power take-off mechanism, consisting of a housing in which a shaft with a drive gear and an element for transmitting torque is installed on the sliding bearings, characterized in that the drive gear is integral with the shaft, and the splines at the end of the shaft serve as an element for transmitting torque In this case, to prevent self-shutting, the slots are made of a thickness that is variable in length and with a radial chamfer on the outer end, to ensure ease and noiselessness of switching on, in addition, a lid is additionally introduced, hermetically closing The housing from the side of the splined end of the shaft - gear.

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