RU1786317C - Reversible two-stage reduction gear - Google Patents

Abstract

The invention relates to mechanical engineering, in particular, to constructions of gearboxes with a reversible driven shaft (BM B) equipped with external and internal gearing (SCR and SCW). The aim of the invention is to improve overall dimensions. R P contains a drive shaft (V uV) 1 with gear 2 and VMV 9 with a wheel 8, a first gear stage, including gear 2 connected to the refueling and 633 gears, wheels 3 and 4, as well as a third gear stage, including gear 7 with a hollow shaft and the wheel 8 and uncoupling clutches (RM) 5 and b / Shafts of the wheels 3 and 4. as well as gears 7 are made craxial G, and gear 7 is connected. NENA and B with wheels 4 and Z. In forward gear, include RM 5, and in reverse, RM 6.1 ill.

Description

The invention relates to mechanical engineering, in particular to constructions of gearboxes of industrial and transport power units.

Two-stage reversible gearboxes (PP) are known in which additional (parasitic) six-way and uncoupling couplings are provided for reversing the construction of the first stage. Putting into the design of the gearbox even one spurious gear entails one or more additional gear elements and shafts. This complicates the design and increases the weight of the gearbox.

The closest technical solution to the invention, the adopted spare part prototype, is a two-stage PP, in which one gear and two wheels are provided in the first stage, the gear being engaged with one wheel and the second (spurious) wheel engaged with the first. On the shafts of said wheels of the first stage, gears of the second stage are fixed, between the wheels

and gears, uncoupling couplings are provided.

The disadvantage of the prototype is the design complexity (two gears in the second stage) and the increased transverse dimension of the first stage, determined by the sum of the diameters of the wheels, and. as a result, the mass of the gearbox is increased.

The aim of the invention is to simplify the design and reduce the weight of the reverse gear.

The goal is achieved in that in the proposed PP. comprising a drive shaft with a gear in the first stage and two gear wheels mounted on the shafts, one of the wheels is made with external and the other with internal teeth. The gear of the drive shaft is engaged with both wheels. The second stage PP contains only one gear and a gear with the output shaft engaged with it. The shafts of the gears of the first stage are mounted coaxially to each other and to the gear of the second stage. For the communication of the first and second steps in the PP there are two

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uncoupling couplings, while their leading coupling halves are fixed on the shafts of the gears of the first stage, and the driven coupling halves are fixed on the ends of the gears of the second stage.

The drawing shows a diagram of the proposed PP.

The gearbox contains an input shaft 1 with a gear 2 of the first stage fixed thereon. Gear 2 is engaged with wheels 3 and 4 of the first stage, made with external 3 and internal 4 teeth. The shafts of gears 3 and 4 are mounted coaxially one to the other and gear 7 of the second stage. The gear 7 is engaged with the second stage wheel 8 fixed to the output shaft 9 of the gearbox. In RR, there are two high-quality uncoupling clutches 5 and 6, the leading coupling halves of which are fixed to the shafts of gears 3 and 4, and the driven coupling halves are fixed to the ends of the gear 7.

The proposed PP works as follows.

The input shaft 1, receiving energy from a non-reversible engine, rotates from all operating modes in the same direction. In this case, the wheel 4 with its shaft rotates in the same direction, and the wheel 3 with its shaft rotates in the opposite direction. When clutch 5 is turned on (clutch b is off), gear 7 receives the direction of rotation of shaft 1. When clutch b is turned on (clutch 5 is turned off), gear 7 changes the direction of rotation. Changing the direction of rotation of the gear. 7 provides a change in the direction of rotation of the wheel 8 and the output shaft 9, i.e. reverse gear.

Claims (1)

 The proposed gearbox in the second stage has only one gear (prototype - two). The transverse dimension of the gearbox is smaller than that of the prototype, since it is determined only by the diameter of the wheel 4. Therefore, the design of the proposed PP is simpler and the mass is smaller than that of the prototype. SUMMARY OF THE INVENTION A reversible two-stage gearbox comprising a drive shaft with a gear and meshed with two first stage gears mounted on the shafts, a gear and a gear being engaged with it, a second stage output shaft and two clutches with drive and driven coupling halves for coupling the first and second stages, characterized in that, in order to simplify the design and reduce weight, the gears of the first stage are made with one of the outer and the other with the inner teeth, the gear shafts s first stage wheel mounted coaxially to each other and the second gear stage, leading coupling half fixed to the shafts of gears of the first stage, and driven half coupling fixed to the ends of the second gear stage. . Bcfc