All-wheels drive arrangement with low input torque especially for the skid-steer loaders

Abstract

In an all-wheel drive arrangement with low input torque especially for the skid-steer loaders controlled by a control unit, made up of battery, frequency converter, electric joystick and/or electro-hydraulic switchgear, both sides of the vehicle control include at least two wheels, each wheel connected to a planetary gearing. The gearing equipped with the infinite gear member (e.g. belt, chain) transfers the torque from the electric motor to each wheel on one side of the vehicle controlled, whereby the planetary gear directly drives the particular wheel.

Claims

1. An all-wheel drive arrangement for a skid-steer loader, the drive arrangement comprising: a control unit that comprises a battery, a frequency converter, and an electric joystick, the control unit being configured for controlling the drive arrangement, exactly two wheels disposed on both sides of the vehicle; a plurality of planetary gearings arranged such that a separate planetary gearing is connected to each wheel, wherein each planetary gearing is linked to the other planetary gearing on a same side of the vehicle by an infinite gear member in the form of a belt, and two electric motors, one for each side of the vehicle, each electric motor being connected to the battery and each electric motor being connected to the infinite gear member on a respective side of the vehicle, wherein the one motor on each side of the vehicle drives both wheels on the respective side by transferring torque from the infinite clear to the planetary clearings on the respective side.

2. The all-wheel drive arrangement according to claim 1, wherein at least one of the wheels on each side of the vehicle is equipped with an electromagnetic brake.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Other objects and features of the invention will become apparent from the following detailed description considered in connection with the accompanying drawings. It is to be understood, however, that the drawings are designed as an illustration only and not as a definition of the limits of the invention.

(2) In the drawings, wherein the same or functionally equivalent components are provided with the same reference symbols:

(3) FIG. 1 illustrates the axonometric view on the all-wheels drive arrangement with low input torque especially for the skid-steer loaders; and

(4) FIG. 2 illustrates the all-wheel drive arrangement diagram consisting of the electric motor and infinite gear member drives on both sides of the vehicle controlled.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(5) The gearing 5 equipped with the infinite gear member (e.g. belt, chain) transfers the torque from the electric motor 2 to each wheel on one side of the vehicle controlled, whereby the planetary gear 1 directly drives the particular wheel. Each wheel has been equipped with own planetary gear 1 driven by the infinite gear member 5. The electric motor 2 directly drives the infinite gear member 5. The infinite gear member 5 transfers the low torque to each wheel's planetary gear 1. The vehicle controlled needs the electric motor 2 and the infinite gear member 5 for each side. If the electric motor drive 2 has been used, the frequency converter 3, electric joystick 6 and battery 4 have been included into the circuit. At least one wheel on each side has been equipped with the electromagnetic brake 7. The control unit 9 controls the drive.

(6) The control unit 9, consisting of battery 4, frequency converter 3, electric joystick 6 and/or electro-hydraulic switchgear 3a controls the all-wheels drive arrangement especially for the skid-steer loaders, whereby both sides of the vehicle controlled consist of at least two wheels where each wheel has been connected to the planetary gearing 1, with the planetary gearings 1 linked by the infinite gear member 5 on one side of the vehicle controlled, whereby the infinite gear member has been connected to a single electric motor 2 connected to battery 4. If the electric motor drive has been used, at least one wheel equipped with the electromagnetic brake 7 can be on each side. The infinite gear member 5 can be of either the belt or chain type.

INDUSTRIAL APPLICABILITY

(7) The all-wheel drive arrangement with low input torque can be used especially in the skid-steer loaders or in other constructionally similar machines.