RU2435087C2 - Differential gear box - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: differential gear box consists of case (1) whereon there is secured input shaft (2) with input gear (3) and output shaft (4) with output gear (5). Rims of input and output gears are in continuous engagement with rims of satellites (6) installed on unit of carriers (7). The unit of carriers is made in form of shaft (8) with carriers (9) rigidly fixed on it. Between neighbour carriers (9) there are installed middle gears (10) rotating relative to shaft (8). Rims of neighbour gears (10) are in continuous engagement with rims of satellites (6). Middle gears (10) are fixed relative to case (1).

EFFECT: increased ratio at reduced dimensions and metal consumption of structure.

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Description

The invention relates to mechanical engineering, in particular to machines for sowing seeds of agricultural crops.

A known gear mechanism for changing the seeding rate, comprising a housing, a drive shaft and a driven shaft, a gear block fixed in rotation, a link with a housing and two gear wheels, an additional shaft mounted with the possibility of axial movement with a control lever fixed to its end, a lever fixing mechanism and etc. /one/.

The disadvantage of this invention is the inability to shift gears on the go in automatic mode and to obtain a large number of gear ratios.

The closest technical solution of the known is a multi-stage automatic gearbox based on a stepped planetary block, including an input shaft on which a planetary gear is mounted, on the ring gears of which one-way clutches, brake belts, driving gears, friction clutches for engaging forward gears are installed , planetary gear for reverse gear, output shaft on which driven gears of forward gears are mounted through one-way clutches and the driven gear of the reverse gear, friction clutches for engaging the engine braking mode and hydraulic control system, the planetary gearbox is made in the form of a stepped planetary block and has several sun gears rigidly connected to the input shaft and combined into a block along which several sets of satellites rotate mounted on a common carrier block, ring gears are installed with the possibility of free rotation on the input shaft, the drive gears are located on both the ends of the block drove in two, two of which were connected with the block rigidly, and two were connected with the block through friction clutches for switching forward gears, which are switched on hydraulically and equipped with clamps, and are engaged with the corresponding driven gear wheels of forward gears of the output shaft, one of which is mounted on the output shaft on the hub freely and communicates with the shaft through a friction clutch, on the outer rings of one-way couplings mounted on ring gears, and on the leading part of the friction clutches permanent magnets are installed and slots are made for the retainer, and speed sensors and clamps are installed in the planetary gear housing and the driven part of the friction clutches, and the outer ring of the one-way clutch is rigidly fixed using a clamp controlled by the control unit according to the parameters of the speed sensor transmitted to the control unit / 2 /.

The disadvantages of this invention are the large overall dimensions and metal consumption, the inability to obtain a large number of gear ratios.

The objective of the present invention is to change gear ratios in motion without interrupting the power flow, reduce metal consumption and structural dimensions while increasing the number of gear ratios.

The problem is achieved in that in a differential gearbox containing a housing, an input shaft, sets of satellites mounted on the carrier block, and the output shaft, the carrier block is made in the form of a shaft with carriers fixed to it, mounted between the adjacent carriers, rotatably relative to the shaft of the carrier block and fixing relative to the housing, the middle gears, the crowns of the satellites mounted on the carrier block are in constant engagement with the crowns of the middle gears and with the crowns of the input and output gears, p The input shaft and the output gear, as well as the output shaft and the output gear, are rigidly interconnected.

The drawing shows a diagram of a differential gearbox (side view).

The differential gearbox consists of a housing 1, on which the input shaft 2 with the input gear 3 and the output shaft 4 with the output gear 5 are fixed, the crowns of the input and output gears are in constant engagement with the crowns of the satellites 6 mounted on the carrier block 7. The carrier block is made in the form of a shaft 8 and with carriers 9 rigidly fixed on it, between the adjacent carriers 9 are installed, with the possibility of rotation relative to the shaft 8, the middle gears 10, and the crowns of the middle gears 10 are in constant engagement with the crowns of the satellites 6, setting lennyh on the block drove 7, it is also possible to fix the middle gears 10 relative to the housing 1.

Differential gearbox operates as follows.

Torque is transmitted through input shaft 2 and input gear 3 to satellites 6 mounted on the first carrier 9 of carrier 7, after which torque is transmitted to middle gear 10, if it is fixed relative to housing 1 at that moment, then satellites 6 run around it and transmit torque to the shaft 8, forcing the entire block of the carrier 7 to rotate, as a result of which the satellites 6, which are meshed with the middle gear 10 fixed relative to the housing and the side closest to the output gear 5, also begin to break in hydrochloric middle gear 10, transmitting the torque through the unrecorded medium gear 10 and satellites 6 mounted on the block 7 led to output gear 5 and the output shaft 4.

The gear ratio of this gearbox is changed by fixing relative to the housing 1 various middle gears 10 in order to ensure continuity of the power flow fixation, and releasing the middle gears 10 should be done with a little overlap. There is also the possibility of using combinations of fixation of the middle gears 10, which allows to reduce the metal consumption and dimensions of the structure, since with one number of links of the mechanism it is possible to create a larger number of gear ratios. The exception is the inability to stop two adjacent middle gears 10, due to the fact that the satellites 6 located between them are blocked, and the gearbox will jam.

Sources of literature

1. USSR Copyright Certificate No. 1702913 A1, publ. 01/07/92.

2. RF patent No. 2348542, IPC8 B60K 17/08, F16H 3/44, publ. 2009.03.10 - the prototype.

Claims (1)

A differential gearbox comprising a housing, an input shaft, sets of satellites mounted on a carrier block, and an output shaft, characterized in that the carrier block is made in the form of a shaft with carriers fixed to it, between adjacent carriers mounted for rotation relative to the shaft of the carrier block and fixation of the middle gears relative to the housing; the crowns of the satellites mounted on the carrier block are in constant engagement with the crowns of the middle gears and with the crowns of the input and output gears, the input shaft and input gear, as well as the output shaft and output gear, being rigidly interconnected, respectively.