SK8655Y1 - Skid steer loader with electric drive - Google Patents

Abstract

Skid steer loader with electric drive, which has a lowered center of gravity of the loader by placing the battery (3) at the bottom between the rear wheels (7a), wherein the accumulator (3) via the electronic control unit (9) supplies power to the independent electric motors (2) of all the traveling wheels (7, 7a) or for electric motors of driven wheels (7), there are at least two wheels (7, 7a) on both sides of the skid-steered vehicle, each of which is connected to a planetary gearbox (8). When two wheels (7) are driven, the planetary gearboxes (8) on one side of the steered vehicle are interconnected by means of an infinite member transmission and this is coupled to first electric motor, on the other side of the steered vehicle they are interconnected by means of an infinite member transmission connected to the second electric motor. The rear wheels (7a) extend beyond the rear bottom of the loader frame.

Description

Technical field

The technical solution relates to a skid steer loader with an electric drive with a reduced center of gravity and extending the trailing wheels behind the rear lower part of the frame, which uses its electric power to power the electric motors placed directly in the wheel discs or one or two electric motors. which drive the wheels on each side of the loader through planetary gearboxes and an endless member. ¹ electrically powered loader does not use the internal combustion engine, and therefore the length of the shorter portion of the motor, which results in the advantage expanded by the departure angle. The stability of the loader is enhanced by the location of the electric accumulator, which is located in a proportion of 40 - 60 percent between the axles, while the center of gravity of the accumulator is located at a lower level than the center of gravity of the internal combustion engine.

BACKGROUND OF THE INVENTION

Nowadays, rta drives in skid steer and articulated loaders use combustion engines or electric motors, and lateral gears are used to distribute energy to the trolley. Conventional traveling wheels are mounted on these gearboxes. The rear of the loaders is fitted with an internal combustion engine and its location requires a longer construction that extends beyond the rear axle and the lacquer prevents handling in tight spaces. Especially when reversing there is a risk of impact and damage to the loader structure, since the wheel is hidden. The internal combustion engine is lighter than the battery but has a higher center of gravity.

The essence of the technical solution

The technical solution consists in the fact that the skid steer loader does not have lateral gears through which the torque is transferred to the traveling wheels. Each wheel is associated with its own planetary gearbox, which is driven by an infinite gear. The transmission of the endless member is driven by one or two electric motors. An infinite member transmission transfers low torque to each planetary gearbox.

By using electric motors to drive and using the battery, the center of gravity of the skid steer loader is more efficiently positioned thanks to the electric accumulators located at the bottom of the loader between the axles, allowing better handling in more difficult working conditions. At the same time, the solution simplifies the design of the skid steer loader, such a loader does not need space for the engine compartment, and is therefore shorter, thereby reaching the rear wheels beyond the rear bottom of the frame when the rear axle axis is located at the rear of the chassis arm. increases the approach angle, as well as overcoming obstacles when reversing, respectively. by hitting the wheels into the obstacle ⁷ and not the loader frame.

In a preferred solution, the skid steer loader has, instead of the gearboxes, only the mountings on which the wheels with electric motors are mounted. To these traveling wheels with electric motors the electric energy is supplied by electric conductors. This makes more efficient use of power to drive, as it does not have to pass through transmission gears in which energy to heat losses occur.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows a schematic of a shunt-operated loader with independent electric motors of all traveling wheels.

Figure 2 is a schematic diagram of a skid steer loader with accumulator and electric motors and drives with an endless transmission member on both sides of the steer loader.

Figure 3 shows a diagram of a skid steer loader with low battery storage and electric motors of all traveling wheels.

Figure 4 shows a skid steer loader with low battery storage.

Figure 5 shows a four-wheel loader with rear wheels extending beyond the rear bottom of the frame.

Examples ⁷ Embodiments

On both sides of the skid steer loader 1 there are at least two wheels 7, each of which is connected to a planetary gearbox 8, then the planetary gearboxes 8 on one side of the driven means are

With K 8655 Υ1 interconnected by means of a transmission to the endless member 6 and it is connected to one electric motor 4 and on the expensive side of the controlled means are interconnected by means of a transmission to the endless member 6 and this connected to the other electric motor 5 and powered.

The torque from the electric motors 4, 5 is transmitted by means of a transmission with an endless transmission member 6 (e.g., belt, chain) to each wheel 7 on one side of the driven means, which wheel 7 is then directly driven via a planetary gearbox 8. In the case of wheels with electric motors 4, 5 on each side, each wheel 7 is equipped with a speed sensor 11 which sends the measured value to the control unit 9. At least one traveling wheel 7 on each side of the loader 1 is equipped with a brake, preferably electromagnetic.

In another solution, the accumulator 3 is connected via an electronic control unit 9 to independent electric motors 2 of all the traveling wheels 7. To synchronize the speed of the traveling wheels with the electric motors 2 on the sides, each wheel 7 is equipped with a speed sensor 11 which sends the measured value to the control unit 9. the electronic unit 9 performs correction for each wheel 7 independently so as to avoid different wheel speeds 7 on the sides. Each traveling wheel 7 with electric motors 2 is preferably equipped with an electromagnetic brake,

The rear wheels 7a extend beyond the rear lower part of the frame 10 and therefore there is no severe collision with the obstacle and consequent damage to the rear part of the loader 1. Using electric motors 2 or 4, 5 to drive and using the accumulator 3 located at the bottom of the loader 1 between the axles, which allows better handling in more difficult working conditions.

Industrial usability

Travel wheels with directly installed electric motor can be used on all types of loaders or in other similar construction machines.

Claims (3)

REQUIREMENTS FOR O C H R A N 1, a skid steer loader with electric drive, characterized in that it has a lowered center of gravity of the loader (1) by placing the battery (3) at the rear bottom between the rear wheels (7a) for power supply to independent electric motors ( 2) all traveling wheels (7) or for electric motors (4, 5), with both sides of the skid steer loader (1) having at least two wheels (7), each of which is connected to a planetary gearbox (8), then to planets The gearboxes (8) on one side of the controlled means are connected by means of a transmission to an endless member (6) and it is connected to one electric motor (4) and on the other side of the controlled means are connected by means of a transmission to an endless member (6) with a second electric motor (5), the rear wheels (7a) extending beyond the rear lower part of the frame (10) of the loader structure (1). A skid steer loader with electric drive according to claim 1, characterized in that each wheel (7) is equipped with a sensor (11) for synchronizing the speed of the traveling wheels (7) with the electric motors (2, 4, 5). ), which sends the measured value to the control unit (9). Skid steer loader with electric drive according to the preceding claims, characterized in that the at least one running wheel (7) on each side of the loader (1) is equipped with a brake, preferably electromagnetic.