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Hydraulic kicker control piston

一种控制柱塞、液压传动的技术，应用在传动系统领域，能够解决泵-马达单元的旋转斜盘不能实施位移等问题

Inactive Publication Date: 2006-02-22
EATON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It is therefore an object of the present invention to provide an improved hydraulic transmission system having a pump-motor unit of the type described which overcomes the rotational skew of the pump-motor unit when the high pressure side of the system leaks down. The problem that the disk cannot implement displacement

Method used

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  • Hydraulic kicker control piston

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Embodiment Construction

[0017] Referring now to the accompanying drawings which are not intended to limit the invention, figure 1 The type of vehicle driveline in which the hydraulic drive system of the present invention is shown to be particularly well suited is shown. While it should be understood that the present invention is not limited to vehicles having four-wheel drive (or, as stated in the Background, to vehicles having drive wheels of the vehicle), figure 1 The vehicle system schematically shown in has four drive wheels W. The invention can also be used in vehicles with only two-wheel drive, in which case the two drive wheels can be the rear drive wheels, or the front drive wheels. Wheel brakes B of conventional type are operatively connected to the respective drive wheels W, the details of which do not form part of the present invention and are only briefly mentioned hereinafter. Preferably, the wheel brakes B, if present, may be part of an overall EHB (Electrohydraulic Braking) system, w...

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PUM

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Abstract

The present invention provides a hydraulic kicker control piston. A pump-motor unit (35) is disclosed, which includes a swashplate (95) having a neutral position ( 3) and first and second displaced positions and comprising first (87) and second (89) pressure actuators associated with the swashplate. Displacement of the swashplate is proportional to substantially only the difference in fluid pressure between a high pressure source (41) and a low pressure source (39). The first pressure actuator includes a first control piston (121) having a first effective area (A1), and the second pressure actuator includes a second control piston (127) having a second effective area (A2), the second effective area being at least somewhat greater than the first effective area. If the high and low pressure sources are at substantially the same pressure, the pressure acting on both of the first and second effective areas will displace the swashplate from neutral toward the second displaced position.

Description

technical field [0001] The present invention relates to hydraulic transmission systems of the type comprising variable displacement hydrostatic pump or motor units, and more particularly, the present invention relates to transmission systems of the type comprising pump-motor units which operate during one phase of the vehicle's duty cycle It acts as a pump in the middle and as a motor in another phase of the vehicle's work cycle. Still more specifically, the present invention relates to a hydraulic transmission system in which the pump-motor unit is of the type having a variable swash plate, only the control pressure communicating with a pair of fluid pressure actuators varies, the rotation The displacement direction and inclination angle of the swash plate are changed. Background technique [0002] Although the hydraulic transmission system of the present invention can be used in various types of hydraulic transmission systems, including transmission systems that are effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H39/00F16H39/06F16H61/42F16H61/439
CPCB60T1/10F04B1/324B60K6/12F16D31/02Y02T10/6208F16H61/439Y02T10/62F15B15/14
Inventor D·G·施瓦泽尔M·J·沃伊特R·V·辛格
Owner EATON CORP