SU1049275A1 - Vehicle drive axle (modifications) - Google Patents

Abstract

1. A vehicle drive axle containing a main gear that includes the drive and driven gears, wheel gears, at least one of which is made planetary, with the driven gear of the main gear set coaxially to the shaft connecting the drive wheel gears and thrusters different By the fact that, in order to simplify the design, reduce the metal consumption and increase the vehicle’s patency, the main drive gear is mounted on the shaft freely and connected to the carrier All gears, and the epicyclic of this wheel transmission is rigidly connected with the corresponding propulsion unit. SL 1C SL I & 1 Fkg.}

Description

2. The vehicle drive axle containing the main gear, including the drive and driven gears, wheel gears, at least one of which is made planetary, with the driven gear wheel mounted coaxially to the shaft connecting the drive gears of the wheel gears, and thrusters different so that, in order to increase the vehicle’s patency by providing a blocking mode, the main drive gear is mounted on the shaft freely and connected to the carrier of one of the wheel gears and cl this transmission wheel rigidly associated with a respective propeller, a main gear provided with an additional pair of gears mounted coaxially to the drive and driven wheels

transmission, one of the wheels of the additional pair is installed with the possibility of connection with the corresponding shaft, and the other is fixed on the shaft rigidly.

3. The bridge according to claim 2, characterized in that in order to ensure that the propulsive speeds are equal with the drive locked, the gear ratio of the additional pair is equal to the ratio;

R , . (1-1ed) 1g

PP

where P is the main parameter of the planetary

p yes used as differential; ipex-gear ratio

other wheel transfer; i - the gear ratio of the main gear.

one

FIELD OF THE INVENTION The invention relates to transport engineering, in particular, to structures of drive axles of transport self-propelled vehicles.

Designs are known for drive axles of vehicles containing a main gear, representing a gear pair, a symmetric differential gear mechanism located between planetary onboard gears, the driving element of which is the sun gear and the follower is the carrier 1.

The conversion of torque, in addition to the gearbox, is carried out in the main gear and on-board planetary gearboxes. The differential drive axle mechanism distributes the torque applied to it between the output shafts and allows them to rotate at unequal speeds.

The disadvantage of this design is the relatively low permeability of a vehicle equipped with a bridge, due to the presence in the central part of the differential mechanism, which significantly increases the dimensions of the bridge and reduces ground clearance.

Also known is the design of the drive axle of automobiles, which includes a single central gearbox and two side drives. The adopted design scheme, converting the torque in the hypoid main gear, allows it to be divided in the central gearbox and sent further to the side gears. Increased torque on wheels

is achieved by transmitting rotation from the sun gear, connected to the semi-axis, through satellites with fixed axles of the carrier on the epicyclic gear attached to the drive wheel hub 2.

The amount of ground clearance for this design, and consequently, the patency of the machine is largely due to the presence in the central part

bridge differential mechanism.

A vehicle drive axle is known, comprising a main gear including drive and driven gears, wheel gears, at least one of which is made planetary, with the main gear driven wheel mounted coaxially to the shaft connecting the drive wheel gears and propulsive devices 3.

0 In the first case, with an unlocked differential mechanism, the torque is evenly distributed from the main gear to the aforementioned planetary rows. In this case, the tapered gear connecting the hollow shafts has the ability to rotate, and the tangential thrust force transmitted by each driving wheel of the bridge is equal and due to the coupling qualities of the driving wheel, which is less favorable in adhesion

0 with expensive conditions. In this case, the distribution of moments and the possibility of changing the angular velocities of the driving wheels is achieved due to the kinematics of the planetary mechanisms of the side gears and the equilibrium (or rotation) of one hollow shaft relative to another. In case of blocking the bevel gear, both hollow shafts (epicycles) are locked onto the housing, and since the drive shaft is common to both onboard gears, the drive axle is locked. A disadvantage of the known construction is the low ground clearance due to the low-level main gearbox in the central part of the bridge, due to the introduction of a sufficiently strong conical slider. For locking the hollow shafts. The purpose of the invention is to simplify the design, reduce the metal consumption and increase the patency of the vehicle. This goal is achieved by the fact that in a drive axle of a vehicle containing a main gear, including driving and driven gears, wheel gears, at least one of which is made planetary, with the main drive gear being mounted coaxially to the shaft connecting the drive wheel gears , and the propellers, the slave,, .. the main gear wheel is mounted on the shaft freely and connected with the carrier of one of the wheel gears, and the epicycle of this wheel gear is rigidly connected with the corresponding move it. To lock the drive, an additional pair of gears are installed, which are mounted coaxially with the driving and driven wheels of the main gear, one of the wheels of the additional pair being installed with the appropriate shaft, and the other fixed to the shaft. In addition, to ensure the equality of propulsive speeds with the drive locked, the gear ratio of the additional pair is equal to: T) | g 1-p is the main parameter of the planetary gear ipefl-gear ratio; if is the gear ratio of the main gear. In FIG. Figure 1 shows the kinematic diagram of the drive axle without a blocking mechanism; in fig. 2 - the same, with the blocking mechanism of the driving bridge. The drive axle contains the main gear consisting of the lead 1 and the driven 2 gears. The latter is rigidly connected to the carrier 3 of the differential mechanism, made on the basis of a planetary row of wheel transmission. On the axle of the carrier 3, the satellites 4 are installed with the possibility of rotation. The sun has 5 planetary rows and 5 is fixedly mounted on the shaft 6; Slave gear 2 is mounted on the same shaft with the possibility of free rotation. The epicyclic 7 planetary row is rigidly fixed on the driving element 8 of the propeller 9. In turn, the shaft 6 connects the rigidly sun gear 5 with the driving element 10 of the onboard transmission. The onboard transmission can be performed both planetary and free, depending on the load of the elements and the required gear ratio. The output shaft of the wheel transmission II is connected to the driving element 12 of the drive 1. If the bridge is equipped with a locking mechanism, then the driven element is rigidly mounted on the shaft 6 14 of an additional gear pair, the gear 15 of which is mounted on the shaft 16 with the possibility of locking on the latter by means of a gear coupling 17. The driving axle operates as follows. Option without blocking. The torque, converted into the vehicle's gearbox, through the shaft 16, the drive gear 1 of the main gear attached thereto, is fed to the driven gear 2 (driven 3). At the same time, satellite 4 distributes the load depending on the moment on the propeller 13 on the epicycle 7., then on the driving element 8 of the propeller 9, and also on the solar bristle 5. Lastly, when the masking line is linearly moved and the moments on the propellers 9 and 13 rotate faster due to the fact that the torque from the propulsion unit 13 is converted in the wheel transmission 11. As the torque increases on one of the propulsion units, the satellite .4 begins to perform accelerated or slow motion. The drive axle pulling force is due to the adhesion of the propulsion device, which is in less favorable conditions for traction, since the summation of the moments converted in the onboard gears takes place in the carrier 3. The variant with blocking. The clutch 17 blocks the bristle 15 on the shaft 16, therefore, from the bristle 1. In this case, the torque is transmitted to the propeller 13 by the following force of the chain: the gear 15 - the driven element 14 - the shaft 6 - the wheel transmission 11 - the propeller 13. The torque is transmitted the propulsion unit 9 through the solar bristle 5 and the carrier 3, since the latter is connected with the shaft 16 through a gear. For a fixed value of the frequency of rotation of the shaft 16, the value of the frequency of rotation of the epicycle 7

will also be constant, as the sun gear 5 and the carrier 3 rotate with frequencies that are not directly dependent on the frequency of rotation of the shaft 16.

A necessary condition for the normal functioning of the locking mechanism is the equality of the angular velocities of the wheels. This is achieved by the equality of the gear ratios of the power circuits: the driving element 15 is the propulsion unit 13 and the driving gear 1 — the propulsion unit 9.

Determine the required ratio between the gear ratio of an additional pair (15-14) and, the gear ratio of the main gear ir, gear ratio of the gearbox 1red with the main parameter of the planetary row (5-3-7) P.

According to the famous formula of Willis

Pa -rpk (1-p) nh; where Pa is the frequency of rotation of the sun 5;

PV - chastota rotation of the epicycle 7, (mover);

P (, - rotation frequency drove 3,

but Pa p / 1d;

P n "ol p / re j

nt) n / ir, we get

 .riL fi-m-4t

1e

1g

 d

After conversion

J (1- P) -. (1-p)

1e -

Ipee

As a result, we have

0-) i

)

1e

1-P

The use of the proposed design will allow increasing the permeability of the vehicle, reducing the metal consumption and increasing the service life of the product.

0

15/7

FIG. 2

Claims (3)

1. The drive axle of the vehicle, comprising a final drive, including a drive gear and a driven gear, wheel gears, at least one of which is made of a planetary gear, the drive gear of the main gear being installed coaxially to the shaft connecting the drive gears of the gear wheels, and movers, characterized in that, in order to simplify the design, reduce metal consumption and increase the cross-country ability of the vehicle, the driven gear of the main gear is mounted on the shaft freely and is connected with the carrier of one of the wheels Transferring and epicycle wheel of the transmission is rigidly connected to the corresponding propeller. _from S 2. The drive axle of the vehicle, containing the main gear, including the driving and driven gears, gears, at least one of which is planetary, and the gear drive gear is installed coaxially to the shaft connecting the driving gears of the gears, and propulsors, characterized in that, in order to increase the passability of the vehicle by providing a blocking mode, the main gear driven wheel is mounted on the shaft free and connected with the carrier of one of the wheel gears, and the epicycle Anna transmission wheel rigidly associated with a respective propeller, a main gear provided with an additional pair of gears mounted coaxially to the drive and driven wheels of the transmission, wherein one of the additional pair of wheels is set to be connected with the corresponding shaft, while the other is rigidly fixed to the shaft. 3. The bridge according to claim 2, characterized in that in order to ensure the equality of the speeds of the propulsors with a locked drive, the gear ratio of the additional pair is equal to the ratio: (1 ~ i red J 1g 1-p where P is the main parameter of the planetary gear used as a differential; ipex — gear ratio of another wheel gear; i is the final drive ratio.