RU2000963C1 - Tractor power take-off reduction gear and gearbox drive - Google Patents

Abstract

Usage: in tractor drives Summary of the invention: the drive includes drive shafts of the gearbox and power take-off gearbox with controlled gear couplings, a gearbox output shaft with gears mounted on it for driving the main gear of the axle, output shaft of the power take-off gearbox for driving aggregated machines the shafts are equipped with individual friction clutches. The drive shaft of the power take-off gearbox is equipped with a gear sliding on the shaft. This gear is connected in one position with a power take-off shaft and in another with a gearbox driven shaft. During operation, depending on the position of the sliding gear, the gearbox can have additional speeds due to the connection with a power take-off gearbox of 1 sludge

Description

The invention relates to tractor construction, and more particularly, to a tractor transmission device comprising a gearbox and a power take-off gear and intended for obtaining a set of tractor speeds for performing various field and transport operations, and also for driving various towed and mounted machines mounted with a tractor.

There are known transmissions in which independent, separately controlled clutches are used to drive the gearbox and to drive the power take-off gear. The disadvantage of this transmission is that during periods when the power take-off gearbox is not used to drive aggregated machines, its clutches and gears are inactive and cannot be used to obtain additional tractor speeds.

Closest to the invention is a gearbox and tractor power take-off drive, comprising drive gear shafts and a power take-off gearbox with steered gear carriages housed in the housing, a gearbox driven shaft with gears mounted on it for driving a tractor main gear, driven a power take-off gearbox shaft with gears for driving aggregated machines. The drive is equipped with an intermediate shaft coaxially placed with the driven shafts of the gearbox and power take-off reducer and made with a bevel gear engaged with the main gear driven gear from the power take-off gear and with a gear clutch mounted on the intermediate shaft with axial movement relative to the shaft for connecting the intermediate shaft to the driven power take-off gear.

In this design, during periods when the power take-off shaft is not used, the gears of the power take-off reducer can be used to obtain an additional series of speeds, however, the transition from the speed included through the power take-off reducer occurs with a disruption of the power flow, i.e. with the tractor stopped at the moment of switching.

The aim of the invention is to eliminate these drawbacks, expanding the functionality of the drive due to the use of a power take-off gearbox to increase the speed of travel, and by eliminating the need to stop the tractor at the time of moving.

This goal is achieved by the fact that the gearbox drive and gear selection

power of the tractor, comprising driving gear shafts and power take-off gears with gears located in the housing; a driven gear shaft with gears mounted on it to drive the main gear of the axle. the driven shaft of the power take-off gearbox to each other by a gear clutch of parts, on each of which gears are rigidly connected to it, and one part of

5 of which are connected by their gears to the drive shaft, equipped with controlled gear shifting clutches and individual friction clutches mounted on drive shafts, and an additional gear mounted on the output shaft of the power take-off gearbox connected to the drive shaft, with the ability to move along it and the kinematic connection in one position with the gear of the driven shaft of the gearbox and in another position with the other part of the driven shaft of the power take-off gear, this part of the driven the shaft is connected by its gear to the aggregated machines, and half of the gear coupling, the connecting part of the driven shaft of the power take-off gearbox, is located on the additional gear.

The drawing shows the kinematic

5 diagram of the drive gearbox and tractor power take-off.

The input shaft 1 of the gearbox drive and the power take-off gearbox is equipped with a gear wheel 2, which at the same time does not engage with gear 3 of the power take-off gearbox and gearbox 4.

Individually mounted on the drive shaft of the power take-off gear

5, a friction clutch 5 for engaging and disengaging this gearbox. The same clutch 6 is mounted on the drive shaft of the gearbox.

PTO and gearbox

0 gears are identical in construction, consist of interchangeable parts, contain four pairs of gears and are located in a single housing.

The operation of the gearbox drive and power take-off gear is carried out as follows.

By moving the gear couplings 7 and 8, they include one of four gears and a power take-off gear. Moving couplings 9 or 10 include one of four

gears in the gearbox From the secondary shaft 11 of the gearbox, rotation is transmitted to the bevel gear 12 of the rear driving axle of the tractor through a gear reducer 13, which serves to increase the number of gears and change the direction of movement. The design of the gearbox may be different, but in this case, switching gear couplings 14 and 15 provides a choice of four ranges of speeds: 1 - transport, II - working, Deputy - slow and eh - reverse.

Thus, with a four-speed gearbox, the tractor will have twelve forward speeds and four rear. In the power take-off gearbox, by switching the clutches 7 and 8, the composite output shaft 16 is rotated at four different speeds. A sliding gear 17 at the end of the shaft 16, being shifted to the right, by means of a gear coupling 19 connects the part of the driven shaft 16 connected to the drive shaft of the power take-off gear with the part 18 of the driven shaft 16 connected to the aggregated machines and through gears 20 and 21 transmits rotation to the shaft 22 of the power take-off shaft, which serves to connect the agricultural machines that are aggregated with the tractor.

In those cases where the agricultural operation does not require the operation of the power take-off shaft, gear 17 is shifted to the left until it engages with gear 23, which is constantly engaged with one of the gears of the transmission secondary shaft 11.

In this case, all four gears of the power take-off gearbox can be used to drive the secondary shaft 11 and, therefore, to obtain additional tractor speeds. The gear ratios are selected so that the speeds through the power take-off gear alternate with the speeds obtained through the box gears, which allows, by turning on the desired gear in the gearbox using clutches 9

or 10 and the desired gear in the power take-off by means of couplings 7 or 8. then select the desired speed, including either friction clutch 5 or friction clutch 6. If during the movement

the gear selected, for example, when the clutch 5 is engaged, it is necessary to change the speed of movement, then when the friction clutch 6 is turned off, put the clutch clutch 9 or 10 to the desired position and turn off the friction clutch 5. simultaneously turning on the friction clutch 6. The tractor without stopping and without breaking the flow power will go to the desired speed. The use of this invention reduces the cost of transmission design, since the power take-off gearbox is used not only for its intended purpose, but also as an additional gearbox to increase the set of speeds, and the ability to change gears without interrupting the flow of power increases the unit's performance up to 10 %

(56) Instruction. Tractors LTZ-55, LTZ-55A and LTZ-55AN. M .: Mechanical Engineering, 1990, p. 167-173.

USSR copyright certificate No. 1361039, cl. B 60K 17/28, 1986.

Claims (1)

The claims DRIVE OF THE GEARBOX AND POWER TAKE-OFF REDUCER TRACTOR A, containing drive shafts of the gearbox and power take-off gearbox with gears, gearbox output shaft with gear wheels mounted on it to drive the main gear of the axle, power take-off gearbox output shaft - 50 capacities for driving aggregated machines, consisting of parts connected to each other by a gear clutch, on each of which gears are rigidly connected to it and one of which is connected by its gears to the drive shaft, from ichayuschiys in that it is provided with a controllable, toothed couplings switching pole .55 5 0, 5 wren and individual friction clutches mounted on the drive shafts, and an additional gear mounted on the part of the driven shaft of the power take-off gear associated with the drive shaft, with the possibility of moving along it and kinematic communication in one position with the gear shaft of the gearbox and in another position - with another part of the driven shaft of the power take-off gearbox, this part of the driven shaft is connected by its gear to aggregated machines, and half of the gear coupling connecting the parts of the driven shaft a power take-off gearbox, located on an additional gear.