DE2116441A1 - Axle drive for motor vehicles or the like - Google Patents

Description

May 25, 1971 1184

Aehs gear for motor vehicles or the like. Addendum to patent (patent application

The invention relates to an axle drive for motor vehicles, work and IT utility vehicles .Or the like., the drive power from the vehicle drive via a change gearbox and a differential gear Right and left side axle shafts of the haders to be driven via one each within the axle funnel arranged reduction gear, which consists of a power-splitting stationary gear with the outside. toothed spur gears is made, according to patent application P 20 41 784.9. *

For motor vehicles, work and IT utility vehicles of the type mentioned above, the drive power is transmitted from the engine via a switchable one Gearbox on a differential. From here, the fiaders to be driven are via right and left Left side axle shafts of the front and rear axles are driven. To the differential gears, the brakes and also to be able to dimension the gearbox and the like small in terms of the forces, is a big one Rear axle ratio required or desirable.

209842/0471 ₂

Axle drives that are designed as single-stage stationary drives are known. Here falls However, due to its large dimensions, the end wheel is out of the normal production program. With this gear unit, variable distance between axes makes it difficult to adapt to the connection for the three-point linkage and the PTO shaft etc. Furthermore, such wheels cause great difficulties in post-treatment, e.g. hardening. at The use of non-hardenable steel results in even larger parts and thus even larger ones Casing.

Next »ind, in order to avoid the disadvantages mentioned above, stationary gear with an internally toothed Spur gear became known as the end gear. The disadvantage here is the material lying outside the toothed circle, the poor possibility of correction the toothing and the cantilevered arrangement of at least the ring gear. Should the gear ratio are changed with a constant center distance, the outer diameter becomes disproportionate great.

Planetary gears are still common as axle gears, which, however, are disadvantageous in terms of the high price and the lack of adaptability are different translations. Every translation requires a new axis. Like the one above The internally toothed spur gear mentioned above, the internal gear rim also falls out of the usual production area out. The power flow within the planet carrier, this being a very expensive additional one Part is done axially, which inevitably leads to deformations and edge wear. Should that Edge wear can be avoided, is a very complex resilient suspension or a double bearing Planet carrier required. As is known, they take

209842/0471

Planetary gears with larger gear ratios take up a lot of space. The translation results from the formula i " _es = ^ 7. ^ / 7.2 ^{+ 1> where the} summand 1 is no longer decisive for the size of the gearbox with larger overall transmission ratios as is the case with small overall transmission ratios.

Furthermore, a gear arrangement was proposed in which between the differential gear and the axle shafts a power-dividing stationary gear with externally toothed. Spur gears is arranged. Here, the stationary gear as üreifach floor-mounted \

drives, d.n. it has three countershafts formed. Due to the coaxial design, however, this transmission cannot be used for a portal axis either.

The object of the invention is therefore to create an axle drive for motor vehicles with a portal axle, aas is characterized by its small footprint, its structurally favorable design with large power transmission excels.

The power-splitting stationary transmission that within of the downwardly protruding part of the portal axis ™ enables the transmission of larger ones Performances with relatively small dimensions, but with guarantee of the necessary ground clearance. Since all spur gears are externally toothed, they are part of the normal production program and can can therefore be manufactured precisely and cost-effectively. The externally toothed spur gears ensure a certain adjustment with variable gear ratios, so that uniform axle housings can be used for several performance classes.

ORIGINAL

Further features essential to the invention can be found in the drawings and in the following Description visible here show *

Fig «, 1 a schematic representation of an axle drive %

2 shows the schematic representation of the power transmission device;

Fig _o 3 an outer end of one half of a portal axis?

Figo 4 shows a further detail of the Aehsgetriebes.

The left-hand side shaft 1 shown schematically in FIG. 1 is driven by the vehicle drive, not shown, via a change gear and a differential gear (also not shown). The side shaft 1 is in drive connection with a pinion shaft 3 via a coupling sleeve 2 _9, the purpose of which will not be explained in detail at first. At the end of the pinion shaft 3, a pinion 4 is arranged in a rotationally fixed manner. As a precaution, the pinion shaft 3 and the tickle 4 are made from one piece. The pinion 4 meshes with two further spur gears 5, 6 (Fig. 2), which are non-rotatably arranged on countershafts 7, 8 =, furthermore, on the countershafts I ₁ 8 spur gears 9 _S 10 are arranged, which are connected to the end gear 11 , which drives the left drive wheel 12 of the vehicle, are engaged. The power is transmitted according to this arrangement, starting from the axle shaft 1 via the coupling sleeve 2, the pinion shaft 3, the pinion 4 and via the countershafts 7, 8 with the spur gears 5, 6 and 9, 10 to the end gear 11 A power split takes place within the Aehsgetriebes, which makes it possible to keep the dimensions of the individual spur gears small.

3 shows the outer end of a portal axis 13. Ia 209842/0471

- D -

In the axle housing 14, the left-hand side shaft 1 is rotatably supported within a bearing 15. On theirs At the outer end, the side shaft 1 has a profile ring 16. The non-rotatable connection of the side shaft 1 ait of the pinion shaft 3 », which in turn also has a profile ring 17, takes place - as already mentioned - via a profiled coupling sleeve 2. Bie end face 18 of pinion shaft 3 rests on the end face 20 of a bolt 19, the end face 20 having a low coefficient of friction has, which is preferably achieved by coating with molybdenum. The pinion shaft 3 is'

thus by this measure against axial displacement secured once in one direction by the bolt 19, while securing in the opposite direction Direction by a locking ring 21, which is arranged within the coupling sleeve 2, guaranteed is. The pinion 4 is, as already mentioned, with spur gears 5, 6 on the countershafts 7, 8 are rotatably mounted, in drive connection. Here are the centers 22, 23 (Fig. 2) of the Countershafts, and the centers 24 of the pinion shaft 3 on a straight line 28 «Through this arrangement uii-ä the oscillating mounting of the pinion shaft 3 is |

ensures that half of the power is transmitted to the countershafts 7, 8 and from there to the End wheel 11 takes place. Therefore, the manufacturing tolerances of the externally toothed spur gears are kept in normal Frenzen.

The axle shaft 25 on which the pulley 11 is attached, is mounted within the axle housing 14 by means of bearings 26, 27. In particular from Pig. 3 can also be seen, that the said axle drive was located in the downwardly projecting part 29 of the portal axis 13 the distribution of services guarantees a kenstruktiv

209842/0471 ⁶ -

space-saving arrangement, "while maintaining the necessary Ground clearance.

Fig. 4 shows the type of storage of one of the countershafts 7 or 8 within the axle housing H.

- 1 - 209842/0471

Claims (7)

Patent to claims 1./axle drive for motor vehicles, work and Commercial vehicles or the like., With the drive power from the vehicle drive via a gearbox and a differential gear on right and left side axle shafts of the to be driven Wheels over one each inside the axle funnel | arranged reduction gear, which consists of a power-splitting standard gear with externally toothed spur gears is made, according to patent application P 20 41 784.9, characterized in that the power-splitting stationary transmission (4, 5, 6, 9, 10, 11) arranged within the downwardly projecting housing part (29) of the portal axis (13) is. 2. Axle drive according to claim 1, characterized in that that a drive connection, starting from the % Side shaft (1) over a ^ itzelwelle (3) and at least two more countershafts (7, 8) on the end gear (11). 3. Axle drive according to Claims 1 and 2, characterized in that that the centers (22, 23, 24) of the pinion shaft (3) and the countershafts (7, 8) on a straight line (28) lie. 209842/0471 4. axle drive according to claims 1 to 3, characterized in that that the pinion shaft (3) is mounted so that it can move radially on all sides. 5. axle drive according to claims 1 to 4, characterized in that that the connection of the side shaft (1) and the pinion shaft (3) via a coupling sleeve (2) he follows. 6. axle drive according to claims 1 to 5 »characterized in that that the pinion shaft (3) against axial displacement on the one hand with its end face (18) on one Bolt (19) rests and on the other hand is secured within the coupling sleeve (2). 7. Axle drive according to claims 1 to 6, characterized in that each countershaft (7 _S 8) has two spur gears (5, 9 or 6, IQ), one of which with the end gear (11) and the other with the pinion (4) the pinion shaft (3) is in drive connection. Ci SB I 2 I C- l · ? ι