RU2272946C1 - Gear box - Google Patents

Abstract

FIELD: transport mechanical engineering.

SUBSTANCE: gear box comprises housing (16) shafts, input shaft (1) with driving pinion (5) secured to the shaft, output shaft (2) provided with the driven gearings (13) and (14) secured to the shaft, two intermediate shafts (3) and (4), and device for shifting gears (8). Gears (6) and (7) rigidly connected with intermediate shafts (3) are different in sizes and connected with the driving pinion (5). Input shaft (1) is mounted in the top section of housing (16) of the gear box. Driving pinion (5) and pinions (6) and (7) of the intermediate shafts connected with it are mounted in the back section of the gear box.

EFFECT: expanded functional capabilities .

3 cl, 4 dwg

Description

The invention relates to vehicles, namely to transmissions of vehicles, mainly tractors.

Known gear shaft transmission containing an input shaft with a pinion gear, two identical intermediate shafts with gears located on them, an output shaft with gears and gear shifting devices. In this case, the intermediate shafts are parallel to the output shaft, and the output shaft is aligned with the input shaft.

The input gear drive gear is connected to the driven gears of the intermediate shafts at the front of the gearbox (1).

The main disadvantage of such a gearbox is the small number of gears.

Also known is a gearbox with the same shaft arrangement, but with a large number of gears, comprising an input shaft with a drive gear, an output shaft with gears fixed thereon, two intermediate shafts with gears and gearshift devices freely mounted on them, the output shaft located coaxially with the input shaft, the intermediate shafts are made unequal and are parallel to the output shaft, and the hard-drive gears of the intermediate shafts of different diameters are different in diameter, connected to the input gear pinion, located in front of the gearbox (2).

The increase in the number of gears is achieved by placing gearshift devices on the intermediate shafts.

Such a gearbox, having compactness and a relatively large number of gears, has found application on vehicles such as automobiles, but is not used in its pure form on tractors due to the insufficient number of gears, it is not used as the main gearbox in integral multi-function gearboxes, transmissions due to limited layout capabilities due to the alignment of the location of the input and output shafts, as well as the front location of the input gear of the input shaft and the connection nnyh with it the driven gears of the intermediate shafts.

The front arrangement of the input gear of the input shaft and the driven gears of the intermediate shafts connected to it in the application of the gearbox as the main one in composite multi-function gearboxes, transmissions increases the complexity, the cost of manufacturing a box, especially a box with a large number of gears with long-shaft shafts, because it is required to unload the shafts or introduce an additional intermediate support in the housing of the box or place a series of gears at the ends of the shafts in front of the front wall of the housing, but in this case, an additional partition is required to protect the dry compartment of the clutch.

The objective of the invention is the creation on the basis of a gearbox containing an input, output and two intermediate shafts, gearboxes with advanced layout capabilities for use in composite multi-function boxes, transmissions while reducing the complexity and cost of its manufacture.

The problem is achieved in that the gearbox contains an input shaft with a fixed drive gear, an output shaft with gears rigidly mounted on it, two intermediate shafts parallel to the output shaft with freely installed gears and gearshift devices, and also with a hard-mounted gear of different diameters each intermediate shaft driven gear connected to the input gear of the input shaft, and the input shaft is not aligned with the output shaft and is located in the upper th part of the gearbox housing parallel to the output shaft, and the drive gear of the input shaft and the rigidly mounted driven gears of the intermediate shafts connected to it are located at the rear of the gearbox.

Intermediate shafts with a set of parts installed on them, in addition to driven gears of different diameters connected to the input gear, are identical. The input gear drive gear and the driven gears of the intermediate shafts connected to it are located at the rear of the gearbox inside in front of the removable rear wall on which the rear ends of the gearbox shafts are mounted.

In an embodiment of a gearbox with long-base shafts, the input gear of the input shaft and the driven gears of the intermediate shafts connected to it are located at the rear of the gearbox behind a removable rear wall at the ends of the shafts mounted on bearings in the rear wall.

The proposed design of the gearbox differs from the known ones in that the input shaft is not aligned with the output shaft and is located at the top of the gearbox parallel to the output shaft, and the drive gear of the input shaft and the hard drive gears of the intermediate shafts of various diameters connected to it are located in the rear of the box gears. Intermediate shafts with a set of parts installed on them, in addition to driven gears connected to the input gear of the input shaft, are identical.

The input drive pinion gear and the driven gears of the intermediate shafts connected to it are located at the rear of the gearbox inside in front of the removable rear wall, on which the rear ends of the shafts are mounted in bearings or, in the case of long-base shafts, are located behind the removable rear wall at the ends of the shafts.

The invention is illustrated by drawings, where:

figure 1 is a kinematic diagram of a gearbox,

figure 2 - arrangement of shafts,

figure 3 is a longitudinal section of a gearbox as part of a composite gearbox, transmission,

figure 4 is a longitudinal section of a variant of a gearbox with long-base shafts with a cantilever arrangement of the input gear of the input shaft and the driven gears of the intermediate shafts.

The gearbox contains the input shaft 1 located in its upper part (Fig. 1), the output shaft 2, misaligned to the input shaft, two identical intermediate shafts 3, 4 located parallel to the output shaft, the drive gear 5 rigidly mounted on the input shaft 1, placed on the intermediate shafts of the gears 6, 7, gears 8, for example friction clutches or synchronizers, freely mounted gears 9, 10, 11, 12, rigidly mounted on the output shaft 2 of the gears 13, 14, rigidly mounted of different diameters a removable rear wall 15 (Fig.3, 4) of the housing 16, in which the rear ends of the shafts 1, 2, 3, 4 are mounted on the bearings.

In an embodiment of a gearbox with long-base shafts (FIG. 4), the drive gear 5 and the driven gears 6, 7 connected to it are located at the ends of the shafts behind the removable rear wall 15.

The proposed gearbox operates as follows:

Power from the engine through the clutch is supplied to the input shaft 1. From the input shaft 1, the power through the gear 5 and the driven gears 6, 7 connected to it is transmitted to the intermediate shafts 3, 4.

Using gear shifting devices 8, for example, friction clutches or synchronizers, power is selectively transmitted from one or another gear of the first or second intermediate shafts 3, 4 to the output shaft 2, providing the number of gears equal to the number of freely mounted gears on the intermediate shafts.

To reduce the complexity of the assembly of the gearbox, all shafts with gears are pre-installed with their rear ends in bearings on the removable rear wall 15. And then assembled are installed in the gearbox housing.

The transmission described above, while retaining all the advantages of the input-output circuit - two intermediate shafts, allows it to be used in multiple gearboxes, transmissions, providing a large number of gears in a wide speed range.

The implementation of the driven gears of the intermediate shafts connected to the input gear of the input shaft is not the same, different in diameter in combination with the sameness of the intermediate shafts and all the other parts installed on them makes it possible to obtain different gears in an economical way.

The placement of the input gear of the input shaft and the driven gears of the intermediate shafts connected to it in the rear of the gearbox and their installation on the ends of the shafts behind the removable rear wall in the embodiment of the gearbox with long-base shafts eliminate the need for introducing an intermediate support into the housing and make it possible to assemble the gearbox with reduced labor intensity along with short-base shafts using a preliminary sub-assembly of shafts with gears into one node based on a removable rear wall.

This arrangement of the gearbox, in the case of using it in a composite gearbox, allows, if necessary, making a connector along the rear wall of the plane with minimal labor input to assemble and disassemble both cases of the composite gearbox.

Literature

1. The application of Germany No. 2819293, class. F 16 H 3/06 "Inventions in the USSR and abroad", issue No. 6 for 1980, p. 36.

2. Japanese application No. 58-14941, F 16 H 3/08 "Inventions in the USSR and abroad", issue No. 23 for 1983, p. 85.

Claims (4)

1. A gearbox comprising a housing, an input shaft with a rigidly mounted drive gear, an output shaft with rigidly mounted gears, two intermediate shafts parallel to the output shaft with freely mounted gears and gearshift devices, as well as with a rigidly installed different diameter on each intermediate the shaft of the driven gear connected to the input gear of the input shaft, characterized in that the input shaft is not aligned with the output shaft and is located in the upper part of the housing ki parallel to the output shaft and the drive gear of the input shaft and connected thereto countershafts driven gears located at the rear of the gearbox. 2. The gearbox according to claim 1, characterized in that the intermediate shafts with a set of parts installed on them, except for driven gears (6, 7), are made the same. 3. The gearbox according to claim 1 or 2, characterized in that the input gear of the input shaft and the driven gears of the intermediate shafts connected to it are located in the rear of the box in front of the removable rear wall of the gearbox housing, in which the rear ends of the shafts are located on the bearings. 4. The gearbox according to claim 1 or 2, characterized in that the input gear of the input shaft and the driven gears of the intermediate shafts connected to it are located at the rear of the box behind the removable rear wall, in which the rear ends of the shafts are located on the bearings.

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