Hydrostatic Axial Piston Machine Utilizing A Bent-Axis Construction

Abstract

A hydrostatic axial piston machine (1) with a bent-axis construction has a drive shaft (4) with a drive flange (3) rotatable around an axis of rotation (Rt). A cylinder drum (7) has an axis of rotation (Rz). The cylinder drum (7) has a plurality of piston bores (8) located concentric to the axis of rotation (Rz) of the cylinder drum (7) and a longitudinally displaceable piston (10) is located in each bore (8). A driving device drives the cylinder drum (7). The drive shaft (4) is a hollow shaft. A torque bar (31) runs through the hollow shaft from a drive flange side end of the axial piston machine (1) to a cylinder drum side end of the axial piston machine (1) to transmit torque from the drive flange side end of the axial piston machine (1) to a cylinder drum side end of the axial piston machine (1).

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority to German Application No. 102013108409.5 filed Aug. 5, 2013, which is herein incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]This invention relates to a hydrostatic axial piston machine utilizing a bent-axis construction. The axial piston machine has a drive shaft rotatable around an axis of rotation and is provided with a drive flange, a cylinder drum rotatable around an axis of rotation, with the cylinder drum including a plurality of piston bores arranged concentric to the axis of rotation of the cylinder drum, a longitudinally displaceable piston in each cylinder bore and a driving device for driving the cylinder drum.[0004]2. Description of Related Art[0005]In axial piston machines that utilize a swashplate construction, the longitudinally displaceable pistons in the cylinder drum are each supported by a sliding shoe on a swashplate. However, on...

AI Technical Summary

Benefits of technology

This patent is about an invention that uses a hollow drive shaft and a torque bar to transfer torque between two parts of a machine. This allows for easy installation and flexibility in applications where a torque transfer is necessary. The design reduces the need for complex power dividers and makes the machine suitable for various uses. Overall, this invention simplifies the process of transferring power in a more efficient way.

Problems solved by technology

However, on account of the high inertial forces of the pistons and the sliding shoes located on the pistons during operation, axial piston machines that utilize a swashplate construction are limited with regard to the maximum allowable speeds of rotation.

The limited maximum allowable speed of rotation of an axial piston machine that utilizes a swashplate construction has disadvantages in terms of its use as a hydraulic motor.

In bent-axis axial piston machines in which the driving device for the cylinder drum is a driving joint located between the drive shaft and the cylinder drum, one disadvantage is that it is not possible to transfer a torque through the axial piston machine because the driving joint is located at the intersection of the axis of rotation of the cylinder drum with the axis of rotation of the drive shaft.

In known bent-axis axial piston machines that utilize a driving joint for driving the cylinder drum, it is not possible to provide torque transfer.

Therefore, the applications of such axial piston machine are limited.

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