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Steering Arrangement

一种转向设备、转向比的技术，应用在转向机构、流体转向机构、动力转向机构等方向，能够解决操作员无法足够快地转动方向盘等问题

Inactive Publication Date: 2015-02-04
J C BAMFORD EXCAVATORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the operator needs to turn the steering wheel quickly, which can be annoying and / or the operator may not be able to turn the steering wheel fast enough

Method used

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Examples

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Embodiment Construction

[0036] refer to figure 1 , which shows a vehicle 10 comprising a steering device according to the invention. The vehicle has a cab 12 mounted on a chassis 13 . Vehicle 10 has front drive road wheels (ground wheels) 14A and 14B, which are steerable wheels. The vehicle also has rear driven road wheels 15A and 15B. Drive road wheels 15A and 15B are in this example non-steerable.

[0037] Steering wheel 11 is arranged in the cab. The steering wheel 11 may be used to drive the travel steerable wheels in rotation about a generally vertical axis to steer the vehicle.

[0038] refer to figure 2 , where a steering device 20 is shown. The main components of this steering device are a pump system 22 , a steering system 24 , a steering ratio switching valve 26 and a steering cylinder device 28 . The steering apparatus includes several backup or so-called "spare" components so that in the event of certain component failures, the vehicle 10 can still be steered.

[0039] The steeri...

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PUM

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Abstract

A steering arrangement (20) including a first hydraulic pressure chamber (31), a second hydraulic pressure chamber (32), a third hydraulic pressure chamber (33) and a fourth hydraulic pressure chamber (34), the first and third pressure chambers (31, 33) being selectively operable to steer in a first direction and the second and fourth pressure chambers (32, 34) being selectively operable to steer in a second direction, a pump system (22) for supplying pressurised fluid to a steering system (24), the steering system (24) being operable to supply the pressurised fluid to one or more of the first, second, third and fourth hydraulic pressure chambers (31, 32, 33, 34), the steering system (24) having a first mode wherein pressurised fluid is simultaneously supplied to the first and third hydraulic pressure chambers (31, 33) to steer in the first direction or wherein pressurised fluid is simultaneously supplied to the second and fourth hydraulic pressure chambers (32, 34) to steer in the second direction, the steering system having a second mode wherein pressurised fluid is supplied to one of the first and third hydraulic pressure chambers (31, 33) to steer in the first direction or wherein pressurised fluid is supplied to one of the second and fourth hydraulic pressure chambers (32, 34) to steer in the second direction, such that the steering ratio is higher in the second mode than in the first mode.

Description

technical field [0001] The invention relates to a steering device. Background technique [0002] Steering devices are known whereby a vehicle may comprise a manually operable steering wheel. The steering wheel is mechanically connected to the steerable wheels that drive the travel to steer the vehicle. [0003] Hydraulic steering systems are also known whereby the steering wheel is hydraulically coupled to the steerable wheels of the vehicle. When a hydraulic leak occurs, proper precautions must be taken to ensure the vehicle remains steerable. One such arrangement is to provide a backup system, ie to provide two parallel steering systems, in the event that one of the steering systems fails, then the other steering system will be able to steer the vehicle. [0004] When the vehicle is running normally, it will have a predetermined steering ratio, i.e., a predetermined number of turns of the steering wheel will be required in order to turn the steered wheels from full left...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/06
CPCB62D5/093B62D5/008B62D5/30A01B69/007B62D5/12A01B69/00
Inventor R·F·G·杨N·J·克拉克R·E·卡德曼
Owner J C BAMFORD EXCAVATORS LTD
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