JPS5881253A - Hub deceleration gear unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hub reduction ear drive unit having a planetary gear arrangement for mounting in the hub of a vehicle, such as a low-P vehicle, tractor, off-highway vehicle, or similar vehicle.

One problem with planetary gear units is that due to the construction constraints imposed by the requirements of planetary gearing, it is impossible to produce a sturdy gear unit unless forging or pressing is used in the construction of the unit. That's true. It is recognized that this leads to relatively expensive units that are particularly unsuitable for small production runs.

Accordingly, there is a need for a hub reduction device that is Klfi length in use, suitable for relatively low volume production operations, and relatively inexpensive to manufacture.

The present invention is directed to providing a # gear unit.

According to the present invention, there is provided a hub reduction gear unit mounted within a hub of a vehicle to transmit transmission from a drive shaft to a hub;
# The gear unit includes a non-rotating circular planetary gear carrier having a protruding hub axle, the planetary gear carrier and the hub axle are integrally cast into one piece made of cast metal, and the planetary ear carrier is ... rotatably supports a planetary gear that meshes with an annular gear fixed concentrically and a sun gear fixed to a sun gear shaft, and the wrinkled sun gear shaft is concentrically attached to the planetary ear carrier. The device is rotatable within the carrier and further includes a planetary ear carrier attachment device for coupling the carrier to the vehicle and a sun gear shaft coupling device for coupling the sun gear shaft to the drive shaft.

In one embodiment of the invention, the mounting device has a pivot joint and the cough coupling device has a universal joint, both joints being transverse to the sun gear axis for steering the vehicle. Limit the common pivot axis.

Preferably, the planetary ear carrier is cast from iron, electromagnetic or aluminum.

The invention will become clearer from the following description of some preferred embodiments thereof, given by way of example only, and with reference to the accompanying drawings, in which: FIG.

First, referring to Figure 1 and Figure 2, the vehicle (not shown)
A hub reduction gear unit of the present invention, generally indicated by the reference numeral 1, is provided to be mounted on a hub 2 of the present invention. In this embodiment of the invention, the hub 2 is steerable to steer a vehicle as will be explained in more detail below.

The hub reduction gear unit comprises a non-rotating planetary gear carrier 3 having a projecting, one-way shaft 4 .

The planetary gear carrier and I-deshaft are cast metal pieces that are cast as one piece, in this case cast iron. The hub shaft 4 is hollow and rotatably supports the hub 2 on a bearing 5. It will be appreciated that the non-rotating castings 3.4 may have as large a cross-section as necessary to support the load, are made of cast material and are relatively inexpensive to manufacture.

The sun gear shaft 9 is rotatably mounted on a bearing 10 in the carrier 3, and is fixed to the sun gear shaft 9.
The sun gear 14 fixed to fj5 is driven. A nut 17 at the end of the shaft 9 holds the bearing 10, sleeve 15, and sun gear shaft 9 together. The sun ear drives three idler M-11 # gears 18 which are rotatable in bins fixed to the planetary gear carrier 3. The shank 2 has an annular ear 2 which is firmly held on the shank 2 by a mating screw 21 on a free m-r side.
Driven by 0. Oil seals 22, 23 provide a seal between the planetary gear carrier, shaft, and shear, respectively. The cover plate 24 is used to check the gear, ha! 2 screws (
(not shown).

A coupling device for coupling the sun gear shaft 9 to the drive shaft 91/C is provided by a universal joint 25. The planetary gear carrier 3 and thus the shear 2 are connected to the illustrated vehicle housing part 28 by means of a mounting device provided by a pivot joint 29.

The pivot joint 29 has a pair of female members 26 of cast iron integral with the planetary gear carrier 3 and engages a male member 30 mounted on the planetary gear carrier 28. The hole 27 of the pivot joint 29 and the universal joint 25 are
Defines a common pivot axis around which the hub pivots for steering the vehicle.

In use, drive shaft 8 drives sun gear shaft 9 . Hedge 2 is driven by a sun gear shaft via gears 14, 18, 20. The vehicle (not shown) is steered by pivoting the beam about a common pivot axis between the pivot joint 29 and the universal joint 25.

A cross reduction gear unit according to another embodiment of the invention is shown in FIG. This Hashi reduction gear unit is similar to that described with reference to FIGS. 1 and 2,
Similar components are designated with similar numerals.

In this embodiment of the invention, the sun gear is axially divided into two parts to provide a pair of sun gears 14 that are mounted side by side on the sun gear shaft 9. The solar ear 14 drives three corresponding pairs of planetary ears 18 which drive a corresponding pair of annular ears 20 . The annular gear and the sun gear are recessed at 31 points corresponding to the positions where the two planetary ears 18 abut.

Through the use of gear pairs, the loads transmitted in the ears can be more evenly balanced and distributed along the gear axis.

In a similar manner, the gears may be paired with opposite hand angles on the teeth of each gear to obtain the meshing effect of a helical/gonal train providing balanced end thrust.

In this arrangement, the sun gear is intended to be spline driven from sleep.

FIG. 4 shows a cross reduction gear unit according to another embodiment of the present invention. The Hashi reduction gear unit is similar to that described with reference to FIGS. 1 and 2, and similar components are designated by the same reference numerals. In this embodiment of the invention, the cane is a non-steerable hub. The planetary ear carrier 3 is secured to the vehicle width housing by means of a mounting device provided in the housing 26 of the planetary ear carrier 3 which is bolted to the vehicle housing 28 with screws 36 .

The solar ear shafts are coupled by a coupling device provided by a shaft coupling (not shown). Also, in this embodiment of the invention:
The idler 1B is attached to the bin 19 with a flexible ring 33. This allows a degree of freedom of relative movement between the gears. Similarly, if desired, the annular gear and/or the sun ear may be attached to a flexible mounting member.

Although the sun gear is secured to a sleeper that is secured to the sun gear shaft, it is recognized that in practice it may be mounted directly to the sun gear shaft. Indeed, in the case of the gear unit of FIG. 4, the sun gear shaft may be formed as an extension of the drive shaft, so that the sun gear is intended to be mounted directly on the drive shaft. .

It is also recognized that while the hub is pivotable for steering the vehicle, it may also be pivotable about a horizontal axis to accommodate independent suspension of the wheels of the vehicle.

Furthermore, while particular types of pivot joints and universal joints have been described in the above embodiments, it is recognized that any suitable joint may be used.

5. , Moreover, there is a no.1 on the shaft protruding from the planetary ear carrier.
It will be appreciated that instead of being rotatably mounted on the planetary gear carrier, the shaft may be rotatably mounted in any suitable arrangement on the planetary gear carrier.

It is conceivable that the annular gear can be cut integrally with the hash. In fact, it is conceivable that in certain cases the annular ear could be cast in one piece with the hash.

One of the advantages of the invention is that since the planetary gear carrier does not rotate, this allows the planetary gear carrier to be cast with a substantial cross section, and in the embodiment of the invention just described, one planetary gear carrier is The shaft and the shaft are described as being made of cast iron, spherical graphite C nodular) iron, high-grade aluminum, high-grade bronze, or other low-corrosion materials.
It is recognized that any building material may be used. #The casting unit is
It is relatively inexpensive to manufacture in small quantities and is significantly cheaper than the forged units traditionally required to drive the hub.

The Hashi unit can be used without departing from the scope of the particular configuration of bearings and seals.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a cantilever reduction gear unit of the present invention, FIG. 2 is an end sectional view of the cantilever reduction gear unit of FIG. 1, and FIG. 3 is a cantilever reduction gear unit of another embodiment of the invention. FIG. 4 shows a diagram similar to FIG. 1 of a hash reduction gear unit according to still another embodiment of the present invention. 1... Deceleration bar e-yaninit 15... Sleep 2... Hashi 11... Nut 3... Planetary ear carrier 18... Planetary gear 4... Hashi shaft 20... Annular ear 8.・・Drive shaft 24・・Lid plate 9・
... Sun ear shaft 25 ... Universal joint 14
...Sun gear 29...Pivot joint 1＼ Representative Asamura Kōgai 4 people

Claims (1)

[Scope of Claims] (1) A hub reduction gear unit mounted within a hub of a vehicle to transmit drive from a drive shaft to a hub, comprising a non-rotating, epicyclic planetary gear carrier having a protruding hub shaft. , the planetary gear carrier and the hub axle are integrally cast into one piece of cast metal, and the planetary gear carrier is fixed to the annular gear concentrically fixed to the hub and the sun gear shaft. rotatably supporting planetary gears meshing with the sun gears, the sun gear shaft being concentric with the planetary gear carrier and rotatable within the shell carrier;
A gear unit comprising: a carrier mounting device for coupling the planetary gear carrier to a vehicle; and a skeleton sun gear shaft coupling device for coupling the sun gear shaft to the drive shaft. (2) the mounting device has a pivot joint; the coupling device has a universal joint; and (1) both joints share a common pivot axis transverse to the sun gear axis for steering the vehicle. The gear unit according to claim 1, which limits the scope of the present invention. (3) The ear unit according to claim 1 or 2, wherein the planetary gear carrier is cast from iron, bronze or aluminum. (4) The ear unit according to any one of claims 1 to 5, wherein the annular gear is cut integrally with the hub. (5) The gear unit according to any one of claims 1 to 3, wherein the annular gear is flexibly attached to the .... (6) The gear unit according to any one of claims 1 to IN5, wherein the planet gear is flexibly mounted. (7) The ear unit according to any one of claims 1 to 6, wherein the sun gear is attached directly to the sun gear shaft. (8) The sun gear is attached to the sun gear shaft. The gear unit according to any one of claims 1 to 6, which is cut into one end of a sleeper fixed to a gear shaft. (9) The planetary gear has two or more axial directions. The gear unit according to any one of claims 1 to 8, in which the annular gear and the sun wheel correspond to the respective planetary gears. The gear unit according to claim 89, which has a partially divided part in the axial direction.The gear unit according to claim 89, wherein each pair of teeth of the 0υ planetary gear and the sun gear and the annular ear meshing therewith are spirally shaped in the axial direction. 413. The ear unit according to claim 10, wherein one of the ear units is left-handed and the other one is right-handed. 12. A single retaining nut of the sun gear shaft having a retaining nut on the gear shaft and being easily disassembled by removing the single retaining nut of the sun gear shaft. ear unit.