WO2023178797A1 - 应急转向系统、底盘和作业机械 - Google Patents

应急转向系统、底盘和作业机械 Download PDF

Info

Publication number
WO2023178797A1
WO2023178797A1 PCT/CN2022/090362 CN2022090362W WO2023178797A1 WO 2023178797 A1 WO2023178797 A1 WO 2023178797A1 CN 2022090362 W CN2022090362 W CN 2022090362W WO 2023178797 A1 WO2023178797 A1 WO 2023178797A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
emergency
pump
assembly
steering
Prior art date
Application number
PCT/CN2022/090362
Other languages
English (en)
French (fr)
Inventor
何全文
吴彬
毕光强
Original Assignee
三一汽车起重机械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三一汽车起重机械有限公司 filed Critical 三一汽车起重机械有限公司
Publication of WO2023178797A1 publication Critical patent/WO2023178797A1/zh

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means

Definitions

  • the invention relates to the technical field of engineering machinery, and in particular to an emergency steering system, a chassis and a working machine.
  • the industry has added an emergency steering system to the original main steering system, and uses a plunger pump that can supply oil in both directions as an emergency power source.
  • the vehicle's gearbox drives the plunger pump forward or reverse. In this way, whether the vehicle is moving forward or backward, the gearbox can drive the plunger pump to supply oil to the hydraulic power steering device.
  • the plunger pump structure is complex and the use cost is high.
  • the present invention provides an emergency steering system, a chassis and a work machine to solve the disadvantage of high cost of using a plunger pump as an emergency power source in the prior art, and to enable the emergency pump to have a bidirectional oil supply function through a reversing conduction assembly. thereby reducing costs.
  • the invention provides an emergency steering system, which includes an oil supply device, a steering power assist component, an emergency pump and a reversing conduction component.
  • the emergency pump is used for transmission connection with a gearbox.
  • the reversing conduction assembly can enable the emergency pump driving hydraulic oil to flow from the oil supply device to the steering assist assembly.
  • the reversing conduction assembly includes a first oil inlet pipeline, a second oil inlet pipeline, a first oil outlet pipeline and a second oil outlet pipeline connected in sequence.
  • the pump includes a first oil port and a second oil port, the first end of the reversing and conducting component is connected to the oil supply device, and the second end of the reversing and conducting component is connected to the second oil port, so
  • the third end of the reversing passage assembly is connected to the first oil port, and the fourth end of the reversing passage assembly is connected to the steering assist assembly.
  • An emergency steering system further includes a power steering pump.
  • the power steering pump is transmission connected to the engine.
  • the oil inlet of the power steering pump is connected to the oil supply device.
  • the power steering pump has an oil inlet connected to the oil supply device.
  • the oil outlet is connected with the power steering assembly.
  • the oil outlet of the power steering pump and the fourth end of the reversing conduction assembly are connected to the power steering assembly through an emergency valve.
  • the emergency valve When the power steering pump When the oil pressure is above the preset value, the emergency valve conducts the power steering pump and the power steering assembly. When the oil pressure of the power steering pump drops below the preset value, the emergency valve conducts The reversing conduction component and the steering power assist component.
  • the emergency pump is a gear pump or a vane pump.
  • a first one-way valve conductive from the first end to the third end is provided on the first oil inlet pipeline, and a first one-way valve is provided on the second oil inlet pipeline.
  • a second one-way valve conductive from the first end to the second end and a third one-way valve directed from the second end to the fourth end is provided on the first oil outlet pipe.
  • valve, a fourth one-way valve directed from the third end to the fourth end is provided on the second oil outlet pipeline.
  • the power steering assembly includes a power steering assembly, a steering power cylinder and a steering control system.
  • One end of the power steering assembly is connected to the emergency valve, and one end is connected to the emergency valve.
  • the power steering cylinder is connected, and one end is connected to the oil supply device. Both the emergency pump and the power steering pump supply oil to the power steering cylinder through the power steering assembly, and the steering control system is used for The power steering assembly is controlled to distribute hydraulic oil to the power steering cylinder.
  • an oil return pipeline is also provided between the emergency valve and the oil supply device.
  • the emergency valve Connect the emergency pump and the oil supply device.
  • the present invention also provides a chassis, including the emergency steering system as described in any one of the above.
  • the present invention also provides a working machine, including the chassis as mentioned above.
  • the emergency steering system provided by the invention includes an oil supply device, a steering assist component, an emergency pump and a reversing conduction component.
  • the emergency pump is used to be connected to the gearbox transmission.
  • the reversing conduction component can enable the emergency pump to drive the hydraulic oil to flow from the oil supply device to the steering assist component.
  • the emergency steering system provided by the present invention uses an emergency pump that cannot supply oil in two directions, combined with a reversing conduction assembly, so that it can achieve the effect of two-way oil supply.
  • the emergency steering system provided by the present invention The system can absorb oil from the oil supply device and deliver hydraulic oil to the steering assist component regardless of whether the emergency pump rotates forward or reverse. At the same time, it has the advantages of simple structure and low cost.
  • Figure 1 is a schematic diagram of the principle of the emergency steering system provided by the present invention.
  • Figure 2 is a schematic diagram of the principle of the reversing conduction component provided by the present invention.
  • the present invention provides an emergency steering system to solve the problem in the prior art that when the engine 100 is stopped or stalled, the engine 100 cannot continue to provide power for the steering power pump 600, causing the steering power cylinder 802 to lose its power source and provide steering operation for the driver. problems that pose greater difficulties.
  • the present invention provides an emergency steering system.
  • the emergency steering system includes an oil supply device 300, a steering assist assembly, an emergency pump 400 and a reversing conduction assembly 500.
  • the oil supply device 300 may be an oil tank or a hydraulic oil tank, and is intended to provide hydraulic oil to a hydraulic system that provides auxiliary force for steering.
  • the power steering assembly is used to provide assist power for steering when the engine 100 is operating normally, and the specific structure will be described below.
  • the gearbox 200 is connected to the chassis. During the sliding process of the chassis, the chassis will reversely drag the gearbox 200 to rotate, and the gearbox 200 can continue to provide power. Therefore, the gearbox 200 can continue to provide power.
  • the emergency pump 400 is connected to the power take-off port of the gearbox 200. When the engine 100 fails, the emergency pump 400 can be powered through the gearbox 200, so that the emergency pump 400 can be used as a power source to continue supplying oil to the power steering assembly.
  • the emergency pump 400 uses a plunger pump, and the plunger pump can be bidirectional.
  • the oil flow direction is fixed regardless of forward or reverse rotation. It is only necessary to connect the oil inlet end of the plunger pump to the oil supply device 300 and the oil outlet end to the steering assist assembly.
  • the plunger pump has a complex structure and high cost. Therefore, the emergency pump 400 of the emergency steering system provided by this application uses a vane pump or gear pump with a simpler structure and lower cost. At the same time, a reversing conduction component 500 is added to realize the emergency pump regardless of the structure. 400 is rotated forward or reversely, so that the direction of oil flow is from the oil supply device 300 to the steering assist assembly.
  • the emergency pump 400 may be a gear pump.
  • the gear pump includes a first oil port 401 and a second oil port 402.
  • the first oil port 401 supplies oil
  • the second oil port 402 supplies oil. Oil comes out of the oil port 402.
  • oil enters the second oil port 402 and oil comes out of the first oil port 401.
  • the reversing passage assembly 500 includes a first oil inlet pipeline 505 , a second oil inlet pipeline 506 , a first oil outlet pipeline 507 and a second oil outlet pipeline 508 that are connected in sequence.
  • the intersection point of the first oil inlet pipe 505 and the second oil inlet pipe 506 is the first end 501 of the reversing guide assembly 500
  • the intersection point of the second oil inlet pipe 506 and the first oil outlet pipe 507 is the third end of the reversing guide assembly 500 .
  • intersection point of the two ends 502, the first oil inlet pipeline 505 and the second oil outlet pipeline 508 is the third end 503 of the reversing conduction assembly 500, and the intersection point of the first oil outlet pipeline 507 and the second oil outlet pipe 508 is the reversing conduction.
  • Fourth end 504 of assembly 500 is the intersection point of the two ends 502, the first oil inlet pipeline 505 and the second oil outlet pipeline 508 .
  • the first end 501 is connected to the oil supply device 300, the second end 502 is connected to the second oil port 402, the third end 503 is connected to the first oil port 401, and the fourth end 504 is connected to the steering assist assembly.
  • the anti-drag gearbox 200 rotates forward, thereby driving the gear pump to rotate forward.
  • the first oil port 401 absorbs oil and the second oil port 402 discharges oil.
  • the reversing conduction assembly 500 conducts the supply voltage.
  • the oil device 300 and the first oil port 401 are connected to the second oil port 402 and the steering assist assembly at the same time.
  • the hydraulic oil enters the gear pump through the oil supply device 300, the first end 501 of the reversing guide assembly 500, the third end 503 of the reversing guide assembly 500 and the first oil port 401.
  • the hydraulic oil is pressurized in the gear pump and passes through the third end.
  • the second oil port 402, the second end 502 of the reversing conductive assembly 500, and the fourth end 504 of the reversing conductive assembly 500 then enter the steering assist assembly.
  • the anti-drag gearbox 200 reverses, thereby driving the gear pump to reverse.
  • the second oil port 402 absorbs oil and the first oil port 401 discharges oil.
  • the reversing conduction assembly 500 conducts the supply voltage.
  • the oil device 300 and the second oil port 402 simultaneously connect the first oil port 401 and the steering assist assembly.
  • the hydraulic oil enters the gear pump through the oil supply device 300, the first end 501 of the reversing guide assembly 500, the second end 502 of the reversing guide assembly 500 and the second oil port 402.
  • the hydraulic oil is pressurized in the gear pump and passes through the third oil port.
  • An oil port 401, the third end 503 of the reversing conductive assembly 500 and the fourth end 504 of the reversing conductive assembly 500 then enter the steering assist assembly.
  • the emergency steering system provided by the present invention also includes a power steering pump 600.
  • the power steering pump 600 can be a gear pump, a vane pump or a plunger pump.
  • the power steering pump 600 is connected to the power take-off port of the engine 100. Transmission connection, powered by engine 100.
  • the oil inlet of the oil circuit of the power steering pump 600 is connected to the oil supply device 300, and the oil outlet is connected to the power steering assembly.
  • the rotation direction of the engine 100 is fixed. When the engine 100 rotates, the power steering pump 600 is driven to operate to supply oil to the power steering assembly.
  • the above-mentioned power steering pump 600 is used when the engine 100 is working normally, and the above-mentioned emergency pump 400 is used when the engine 100 fails and cannot provide power for the steering power assembly. Both of them are not required. At the same time, hydraulic oil is provided for the power steering component.
  • the emergency steering system provided by the present invention also includes an emergency valve 700.
  • the emergency valve 700 can be understood as a valve that selectively opens and closes.
  • the preset value is the minimum value of the oil pressure required by the power steering component.
  • the emergency valve 700 conducts the emergency pump 400 and the power steering assembly, and the emergency pump 400 provides oil pressure to the power steering assembly.
  • This emergency steering system uses dual steering power sources to greatly improve vehicle driving safety.
  • a first one-way valve 509 is provided on the first oil inlet pipeline 505, and the conduction direction of the first one-way valve 509 is from the first end 501 to the third end 503; in the second A second one-way valve 510 is provided on the oil inlet pipeline 506. The conduction direction of the second one-way valve 510 is from the first end 501 to the second end 502; a third one-way valve is provided on the first oil outlet pipeline 507.
  • the conduction direction of the third one-way valve 511 is from the second end 502 to the fourth end 504; a fourth one-way valve 512 is provided on the second oil outlet pipeline 508, and the conduction direction of the fourth one-way valve 512
  • the third end 503 faces the fourth end 504.
  • the emergency pump 400 rotates forward, the first oil port 401 enters oil, and the second oil port 402 discharges oil.
  • the third end of the reversing conduction assembly 500 connected to the first oil port 401 Position 503 is negative pressure. Due to the existence of the fourth one-way valve 512, the hydraulic oil cannot pass through the fourth one-way valve 512 from the fourth end 504 to the third end 503, but the hydraulic oil can pass through the oil supply device 300 and the first end. 501 and the first one-way valve 509 reach the third end 503, and the hydraulic oil enters the emergency pump 400 through the first oil port 401 after passing through the third end 503.
  • the hydraulic oil is pressurized in the emergency pump 400 and discharged through the second oil port 402. At this time, the pressure at the second end 502 of the reversing conduction assembly 500 increases. Due to the presence of the second one-way valve 510, the hydraulic oil cannot pass through. The second one-way valve 510 reaches the first end 501 position, and can only reach the fourth end 504 position through the third one-way valve 511. Finally, the hydraulic oil enters the steering assist assembly through the fourth end 504.
  • the second oil port 402 supplies oil, and the first oil port 401 discharges oil.
  • the second end of the reversing conduction assembly 500 connected to the second oil port 402 Position 502 is negative pressure. Due to the existence of the third one-way valve 511, the hydraulic oil cannot pass through the third one-way valve 511 from the fourth end 504 to the second end 502, but the hydraulic oil can pass through the oil supply device 300 and the first end. 501 and the second one-way valve 510 reach the second end 502. The hydraulic oil passes through the second end 502 and then enters the emergency pump 400 through the second oil port 402.
  • the hydraulic oil is pressurized in the emergency pump 400 and discharged through the first oil port 401. At this time, the pressure at the third end 503 of the reversing conduction assembly 500 increases. Due to the existence of the first one-way valve 509, the hydraulic oil cannot pass through. When the first one-way valve 509 reaches the first end 501 position, it can only reach the fourth end 504 position through the fourth one-way valve 512. Finally, the hydraulic oil enters the steering assist assembly through the fourth end 504.
  • the above-mentioned power steering assembly includes a power steering assembly 801, a power steering cylinder 802 and a steering control system 803.
  • the power steering assembly is a prior art.
  • One end of the power steering assembly 801 is connected to the emergency valve 700 , one end is connected to the steering power cylinder 802 , and the other end is connected to the oil supply device 300 .
  • the hydraulic oil Before the hydraulic oil reaches the steering power cylinder 802, it needs to distribute oil pressure through the power steering assembly 801.
  • the steering control system 803 controls the power steering assembly 801 to distribute oil pressure to the steering power cylinder 802, so that the steering power cylinder 802 provides assist force for steering.
  • the return oil from the power steering cylinder 802 returns to the oil supply device 300 through the power steering assembly 801.
  • an oil return pipeline 701 is also provided between the above-mentioned emergency valve 700 and the oil supply device 300 .
  • the engine 100 drives the power steering pump 600 to work normally, and the hydraulic oil for the power steering assembly is provided by the power steering pump 600 .
  • the gearbox 200 is also working normally, thereby driving the emergency pump 400 to operate.
  • the emergency valve 700 connects the emergency valve 700 with the oil return pipeline 701, so that the hydraulic oil pressurized by the emergency pump 400 directly flows back to the oil supply. within device 300.
  • the emergency valve 700 closes the communication with the oil return pipeline 701 so that the hydraulic oil provided by the emergency pump 400 is directly supplied to the power steering assembly.
  • the emergency steering system uses dual steering power sources, which greatly improves the safety of automobile driving. It uses a combination of a vane pump or a gear pump and a reversing conduction assembly 500 to replace the relatively expensive plunger pump, thereby reducing costs.
  • the present invention also provides a chassis, which is provided with the emergency steering system as mentioned above, and therefore has the same advantages as above.
  • the present invention also provides a working machine.
  • the working machine includes the above-mentioned chassis and also has the above-mentioned emergency steering system. Therefore, it has the same advantages as above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

本发明涉及工程机械领域，提供一种应急转向系统、底盘和作业机械，包括供油装置、转向助力组件、应急泵和换向导通组件。应急泵用于与变速箱传动连接，当应急泵正转或反转时，换向导通组件均能使应急泵驱动液压油由供油装置流向转向助力组件。本发明提供的应急转向系统使用无法双向供油的应急泵与换向导通组件相结合，使其实现双向供油的效果，与现有技术中的柱塞泵相比，本发明提供的应急转向系统在实现无论应急泵正转还是倒转，均可向供油装置吸油，并将液压油输送至转向助力组件的效果的同时，具备结构简单，成本低的优点。

Description

应急转向系统、底盘和作业机械 技术领域
本发明涉及工程机械技术领域，尤其涉及一种应急转向系统、底盘和作业机械。
背景技术
在正常状况下，实现车辆转向所需的能量只有一小部分是由驾驶员通过机械转向系提供的，而大部分是由发动机通过液压助力转向装置提供的，即在转向过程中，发动机带动转向助力泵运转，进而向转向助力缸提供压力油，使转向助力缸动作，从而辅助实现轮胎的转向。
若车辆正常行驶状态遭遇发动机停机或熄火的情况时，液压助力转向装置将失去动力源，将会给驾驶员转向操作带来较大困难，极易导致事故发生。
为提高驾乘安全性，业内在原有的主转向系统基础上增加了应急转向系统，并且采用可双向供油的柱塞泵作为应急动力源，由车辆的变速箱驱动柱塞泵正向或反向运转，如此，无论车辆前行还是后退，变速箱均可驱动柱塞泵向液压助力转向装置供油，但是柱塞泵结构较复杂，使用成本较高。
发明内容
本发明提供一种应急转向系统、底盘和作业机械，用以解决现有技术中使用柱塞泵作为应急动力源成本高的缺陷，实现通过换向导通组件使应急泵具备双向供油的功能，进而降低成本的效果。
本发明提供一种应急转向系统，包括供油装置、转向助力组件、应急泵和换向导通组件，所述应急泵用于与变速箱传动连接，当所述应急泵正转或反转时，所述换向导通组件均能使所述应急泵驱动液压油由所述供油装置流向所述转向助力组件。
根据本发明提供的一种应急转向系统，所述换向导通组件包括首尾顺次连接的第一进油管路、第二进油管路、第一出油管路和第二出油管路，所述应急泵包括第一油口和第二油口，所述换向导通组件的第一端与所述供油装置连通，所述换向导通组件的第二端与所述第二油口连通，所述换向导通组 件的第三端与所述第一油口连通，所述换向导通组件的第四端与所述转向助力组件连通。
根据本发明提供的一种应急转向系统，还包括转向助力泵，所述转向助力泵与发动机传动连接，所述转向助力泵的进油口与所述供油装置连通，所述转向助力泵的出油口与所述转向助力组件连通。
根据本发明提供的一种应急转向系统，所述转向助力泵的出油口以及所述换向导通组件的第四端均通过应急阀与所述转向助力组件连通，当所述转向助力泵的油压在预设值以上时，所述应急阀导通所述转向助力泵与所述转向助力组件，当所述转向助力泵的油压降低到预设值以下时，所述应急阀导通所述换向导通组件与所述转向助力组件。
根据本发明提供的一种应急转向系统，所述应急泵为齿轮泵或叶片泵。
根据本发明提供的一种应急转向系统，所述第一进油管路上设置有由所述第一端向所述第三端方向导通的第一单向阀，所述第二进油管路上设置有由所述第一端向所述第二端方向导通的第二单向阀，所述第一出油管路上设置有由所述第二端向所述第四端方向的第三单向阀，所述第二出油管路上设置有由所述第三端向所述第四端方向的第四单向阀。
根据本发明提供的一种应急转向系统，所述转向助力组件包括动力转向器总成、转向助力缸和转向操纵系统，所述动力转向器总成的一端与所述应急阀连通，一端与所述转向助力缸连通，一端与所述供油装置连通，所述应急泵和所述转向助力泵均通过所述动力转向器总成向所述转向助力缸供油，所述转向操纵系统用于控制所述动力转向器总成为所述转向助力缸分配液压油。
根据本发明提供的一种应急转向系统，所述应急阀与所述供油装置之间还设置有回油管路，当所述转向助力泵的油压在预设值以上时，所述应急阀导通所述应急泵与所述供油装置。
本发明还提供一种底盘，包括如以上任一项所述的应急转向系统。
本发明还提供一种作业机械，包括如上所述的底盘。
本发明提供的应急转向系统，包括供油装置、转向助力组件、应急泵和换向导通组件。应急泵用于与变速箱传动连接，当应急泵正转或反转时，换 向导通组件均能使应急泵驱动液压油由供油装置流向转向助力组件。本发明提供的应急转向系统使用无法双向供油的应急泵与换向导通组件相结合，使其实现双向供油的效果，与现有技术中的柱塞泵相比，本发明提供的应急转向系统在实现无论应急泵正转还是倒转，均可向供油装置吸油，并将液压油输送至转向助力组件的效果的同时，具备结构简单，成本低的优点。
进一步的，本发明提供的底盘和作业机械，由于均具有如上所述的应急转向系统，因此，同样具有如上所述的优势。
附图说明
图1是本发明提供的应急转向系统原理示意图；
图2是本发明提供的换向导通组件原理示意图。
附图标记说明：
100：发动机；200：变速箱；300：供油装置；400：应急泵；401：第一油口；402：第二油口；500：换向导通组件；501：第一端；502：第二端；503：第三端；504：第四端；505：第一进油管路；506：第二进油管路；507：第一出油管路；508：第二出油管路；509：第一单向阀；510：第二单向阀；511：第三单向阀；512：第四单向阀；600：转向助力泵；700：应急阀；701：回油管路；801；动力转向器总成；802：转向助力缸；803：转向操纵系统。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明中的附图，对本发明中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
下面结合图1至图2描述本发明的应急转向系统、底盘和作业机械。
本发明提供一种应急转向系统，用于解决现有技术中当发动机100停机或熄火时，发动机100无法为转向助力泵600继续提供动力，使转向助力缸802失去动力源，为驾驶员转向操作带来较大困难的问题。
本发明为解决上述问题，提供一种应急转向系统，该应急转向系统包括供油装置300、转向助力组件、应急泵400和换向导通组件500。
供油装置300可以为油罐或者液压油箱，目的是为了向为转向提供辅助力的液压系统提供液压油。
转向助力组件用于在发动机100正常工作的情况下为转向提供辅助力，具体结构将在下文叙述。
虽然发动机100在出现突然停车或熄火时，无法继续提供动力，但是变速箱200与底盘连接，在底盘滑行过程中，底盘会反拖变速箱200转动，变速箱200可继续提供动力，因此，将应急泵400与变速箱200的取力口连接，当发动机100出现故障时，可通过变速箱200为应急泵400提供动力，使应急泵400作为动力源继续为转向助力组件供油。
当车辆前进或后退时，变速箱200的转向相反，进而，与变速箱200连接的应急泵400的转向也相反，因此，在现有技术中应急泵400使用柱塞泵，柱塞泵可以双向工作，无论正转还是反转，油流方向均固定，只需将柱塞泵进油的一端与供油装置300连通，出油的一端与转向助力组件连通即可。
但是柱塞泵结构复杂，成本高，因此，本申请提供的应急转向系统的应急泵400使用结构更简单，成本更低的叶片泵或齿轮泵，同时增加换向导通组件500，实现无论应急泵400正转还是反转，使油流方向均由供油装置300朝向转向助力组件的效果。
在本发明的一个实施例中，应急泵400可以为齿轮泵，该齿轮泵包括第一油口401和第二油口402，当齿轮泵正转时，第一油口401进油，第二油口402出油，当齿轮泵反转时，第二油口402进油，第一油口401出油。
换向导通组件500包括首尾顺次连接的第一进油管路505、第二进油管路506、第一出油管路507和第二出油管路508。第一进油管路505和第二进油管路506的交点为换向导通组件500的第一端501，第二进油管路506与第一出油管路507的交点为换向导通组件500的第二端502，第一进油管路505与第二出油管路508的交点为换向导通组件500的第三端503，第一出油管路507与第二出油管路508的交点为换向导通组件500的第四端504。
第一端501与供油装置300连通，第二端502与第二油口402连通，第 三端503与第一油口401连通，第四端504与转向助力组件连通。
当车辆向前行驶时，反拖变速箱200正转，进而带动齿轮泵正转，此时，第一油口401吸油，第二油口402出油，此时换向导通组件500导通供油装置300与第一油口401，同时，导通第二油口402与转向助力组件。液压油经供油装置300、换向导通组件500的第一端501、换向导通组件500的第三端503和第一油口401进入齿轮泵，液压油在齿轮泵内加压后经第二油口402、换向导通组件500的第二端502和换向导通组件500的第四端504后进入转向助力组件。
当车辆向后行驶时，反拖变速箱200反转，进而带动齿轮泵反转，此时，第二油口402吸油，第一油口401出油，此时换向导通组件500导通供油装置300与第二油口402，同时，导通第一油口401与转向助力组件。液压油经供油装置300、换向导通组件500的第一端501、换向导通组件500的第二端502和第二油口402进入齿轮泵，液压油在齿轮泵内加压后经第一油口401、换向导通组件500的第三端503和换向导通组件500的第四端504后进入转向助力组件。
以上以齿轮泵为例对本方案进行介绍，当应急泵400为叶片泵时与上述的原理相同，本领域技术人员可根据上述公开轻易得知如何使用叶片泵实现上述效果，此处不再赘述。
在本发明的一个实施例中，本发明提供的应急转向系统还包括转向助力泵600，转向助力泵600可以为齿轮泵、叶片泵或者柱塞泵，转向助力泵600与发动机100的取力口传动连接，由发动机100提供动力。转向助力泵600的油路的进油口与供油装置300连通，出油口与转向助力组件连通。发动机100的转动方向固定，当发动机100转动时，带动转向助力泵600运转，为转向助力组件进行供油。
在本发明的一个实施例中，上述的转向助力泵600应用于发动机100正常工作的情况下，上述的应急泵400应用于发动机100故障、无法为转向助力组件提供动力的情况下，两者无需同时为转向助力组件提供液压油。
因此，本发明提供的应急转向系统还包括应急阀700，应急阀700可以理解为一种选择开闭的阀门。当发动机100和转向助力泵600均正常工作时， 转向助力泵600为转向助力组件提供的液压油的油压位于预设值之上，预设值即转向助力组件所需油压的最小值，此时，应急阀700导通转向助力泵600与转向助力组件，同时关闭应急泵400与转向助力组件的连通。当发动机100和转向助力泵600两者至少其中之一发生故障，且转向助力泵600提供的油压下降至预设值以下时，应急阀700导通应急泵400与转向助力组件，由应急泵400向转向助力组件提供油压。该应急转向系统采用双转向动力源，大幅提升汽车行驶安全性。
在本发明的一个实施例中，在第一进油管路505上设置有第一单向阀509，第一单向阀509的导通方向为第一端501朝向第三端503；在第二进油管路506上设置有第二单向阀510，第二单向阀510的导通方向为第一端501朝向第二端502；在第一出油管路507上设置有第三单向阀511，第三单向阀511的导通方向为第二端502朝向第四端504；在第二出油管路508上设置有第四单向阀512，第四单向阀512的导通方向为第三端503朝向第四端504。
以下将针对应急泵400正转和倒转两种情况对该换向导通组件500的工作原理进行说明。
当变速箱200正转时，应急泵400正转，第一油口401进油，第二油口402出油，此时，与第一油口401连接的换向导通组件500的第三端503位置为负压，由于第四单向阀512的存在，液压油无法通过第四单向阀512由第四端504到达第三端503，而液压油可以经供油装置300、第一端501和第一单向阀509到达第三端503，液压油经过第三端503后经第一油口401进入应急泵400。
液压油在应急泵400内加压后经第二油口402排出，此时换向导通组件500的第二端502位置压力升高，由于有第二单向阀510的存在，液压油无法通过第二单向阀510到达第一端501位置，只能经过第三单向阀511到达第四端504位置，最后液压油经第四端504进入转向助力组件。
当变速箱200反转时，应急泵400反转，第二油口402进油，第一油口401出油，此时，与第二油口402连接的换向导通组件500的第二端502位置为负压，由于第三单向阀511的存在，液压油无法经第三单向阀511由第 四端504到达第二端502，而液压油可以经供油装置300、第一端501和第二单向阀510到达第二端502，液压油经过第二端502后经第二油口402进入应急泵400。
液压油在应急泵400内加压后经第一油口401排出，此时换向导通组件500的第三端503位置压力升高，由于有第一单向阀509的存在，液压油无法通过第一单向阀509到达第一端501位置，只能经过第四单向阀512到达第四端504位置，最后液压油经第四端504进入转向助力组件。
在本发明的一个实施例中，上述的转向助力组件包括动力转向器总成801、转向助力缸802和转向操纵系统803，该转向助力组件为现有技术。动力转向器总成801的一端与应急阀700连通，一端与转向助力缸802连通，一端与供油装置300连通。液压油在到达转向助力缸802之前，需要经过动力转向器总成801为其分配油压。
当车辆需要转弯时，转向操纵系统803控制动力转向器总成801为转向助力缸802分配油压，使转向助力缸802为转向提供辅助力。转向助力缸802的回油经动力转向器总成801回到供油装置300。
当车辆直行时，经转向助力泵600或应急泵400提供的液压油在经过动力转向器总成801后直接回流到供油装置300。
在本发明的一个实施例中，上述的应急阀700与供油装置300之间还设置有回油管路701。当车辆正常行驶时，发动机100带动转向助力泵600正常工作，转向助力组件的液压油由转向助力泵600提供。但与此同时，变速箱200也在正常工作，进而驱动应急泵400运转。
因此，当转向助力泵600提供的油压在预设值以上时，应急阀700导通应急阀700与回油管路701的连通，使经过应急泵400加压后的液压油直接回流到供油装置300内。当转向助力泵600提供的油压下降到预设值以下时，应急阀700关闭与回油管路701的连通，使应急泵400提供的液压油直接向转向助力组件供给。
本发明提供的应急转向系统采用双转向动力源，大幅提高汽车行驶的安全性，使用叶片泵或齿轮泵与换向导通组件500的组合代替成本较高的柱塞泵，降低成本。
本发明还提供一种底盘，该底盘上设置有如上所述的应急转向系统，因此，具有与如上所述相同的优势。
本发明还提供一种作业机械，该作业机械包括上述的底盘，同样也具有如上所述的应急转向系统，因此，具有与如上所述相同的优势。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (10)

  1. 一种应急转向系统，其特征在于，包括供油装置(300)、转向助力组件、应急泵(400)和换向导通组件(500)，所述应急泵(400)用于与变速箱(200)传动连接，当所述应急泵(400)正转或反转时，所述换向导通组件(500)均能使所述应急泵(400)驱动液压油由所述供油装置(300)流向所述转向助力组件。
  2. 根据权利要求1所述的应急转向系统，其特征在于，所述换向导通组件(500)包括首尾顺次连接的第一进油管路(505)、第二进油管路(506)、第一出油管路(507)和第二出油管路(508)，所述应急泵(400)包括第一油口(401)和第二油口(402)，所述换向导通组件(500)的第一端(501)与所述供油装置(300)连通，所述换向导通组件(500)的第二端(502)与所述第二油口(402)连通，所述换向导通组件(500)的第三端(503)与所述第一油口(401)连通，所述换向导通组件(500)的第四端(504)与所述转向助力组件连通。
  3. 根据权利要求2所述的应急转向系统，其特征在于，还包括转向助力泵(600)，所述转向助力泵(600)与发动机(100)传动连接，所述转向助力泵(600)的进油口与所述供油装置(300)连通，所述转向助力泵(600)的出油口与所述转向助力组件连通。
  4. 根据权利要求3所述的应急转向系统，其特征在于，所述转向助力泵(600)的出油口以及所述换向导通组件(500)的第四端(504)均通过应急阀(700)与所述转向助力组件连通，当所述转向助力泵(600)的油压在预设值以上时，所述应急阀(700)导通所述转向助力泵(600)与所述转向助力组件，当所述转向助力泵(600)的油压降低到预设值以下时，所述应急阀(700)导通所述换向导通组件(500)与所述转向助力组件。
  5. 根据权利要求1-4任一项所述的应急转向系统，其特征在于，所述应急泵(400)为齿轮泵或叶片泵。
  6. 根据权利要求2所述的应急转向系统，其特征在于，所述第一进油管路(505)上设置有由所述第一端(501)向所述第三端(503)方向导通的第一单向阀(509)，所述第二进油管路(506)上设置有由所述第一端(501) 向所述第二端(502)方向导通的第二单向阀(510)，所述第一出油管路(507)上设置有由所述第二端(502)向所述第四端(504)方向的第三单向阀(511)，所述第二出油管路(508)上设置有由所述第三端(503)向所述第四端(504)方向的第四单向阀(512)。
  7. 根据权利要求1-4任一项所述的应急转向系统，其特征在于，所述转向助力组件包括动力转向器总成(801)、转向助力缸(802)和转向操纵系统(803)，所述动力转向器总成(801)的一端与所述应急阀(700)连通，一端与所述转向助力缸(802)连通，一端与所述供油装置(300)连通，所述应急泵(400)和所述转向助力泵(600)均通过所述动力转向器总成(801)向所述转向助力缸(802)供油，所述转向操纵系统(803)用于控制所述动力转向器总成(801)为所述转向助力缸(802)分配液压油。
  8. 根据权利要求4所述的应急转向系统，其特征在于，所述应急阀(700)与所述供油装置(300)之间还设置有回油管路(701)，当所述转向助力泵(600)的油压在预设值以上时，所述应急阀(700)导通所述应急泵(400)与所述供油装置(300)。
  9. 一种底盘，其特征在于，包括如权利要求1-8任一项所述的应急转向系统。
  10. 一种作业机械，其特征在于，包括如权利要求9所述的底盘。
PCT/CN2022/090362 2022-03-22 2022-04-29 应急转向系统、底盘和作业机械 WO2023178797A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210286590.3A CN114590314A (zh) 2022-03-22 2022-03-22 应急转向系统、底盘和作业机械
CN202210286590.3 2022-03-22

Publications (1)

Publication Number Publication Date
WO2023178797A1 true WO2023178797A1 (zh) 2023-09-28

Family

ID=81810380

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/090362 WO2023178797A1 (zh) 2022-03-22 2022-04-29 应急转向系统、底盘和作业机械

Country Status (2)

Country Link
CN (1) CN114590314A (zh)
WO (1) WO2023178797A1 (zh)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH111171A (ja) * 1997-06-13 1999-01-06 Komatsu Ltd 油圧式自走車両の緊急油圧操舵装置
JP2001219857A (ja) * 2000-02-09 2001-08-14 Kayaba Ind Co Ltd 車両の油圧式パワーステアリング装置
JP2013151258A (ja) * 2012-01-26 2013-08-08 Isuzu Motors Ltd パワーステアリングシステム、車両、及びその制御方法。
CN104210541A (zh) * 2014-08-26 2014-12-17 三一汽车起重机械有限公司 车辆应急转向系统及轮式起重机
CN106494500A (zh) * 2016-10-21 2017-03-15 贵州詹阳动力重工有限公司 一种应急转向系统、工程机械
CN215154999U (zh) * 2021-04-21 2021-12-14 三一汽车起重机械有限公司 一种全液压应急转向系统及工程机械
CN114179906A (zh) * 2021-12-24 2022-03-15 三一汽车起重机械有限公司 应急转向系统及作业车辆

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001171505A (ja) * 1999-12-16 2001-06-26 Tcm Corp 車両の補助制動装置
CN202107021U (zh) * 2011-06-15 2012-01-11 上海海鹏特种车辆有限公司 一种轴线车液压应急转向装置
CN102700603B (zh) * 2012-05-31 2013-12-25 陕西秦川机械发展股份有限公司 一种应急式双回路转向助力系统
JP6346406B6 (ja) * 2013-04-09 2023-10-11 いすゞ自動車株式会社 油圧パワーステアリングシステム、それを搭載した車両、及び油圧パワーステアリングシステムの制御方法
CN203427875U (zh) * 2013-07-22 2014-02-12 上汽依维柯红岩商用车有限公司 重型商用汽车转向系统
CN204250157U (zh) * 2014-11-14 2015-04-08 南京徐工汽车制造有限公司 一种应急式双回路动力转向系统
CN107472358B (zh) * 2017-08-18 2023-12-15 龙工(上海)机械制造有限公司 轮式装载机应急转向液压系统
CN110091916B (zh) * 2019-05-27 2023-08-15 徐工集团工程机械股份有限公司科技分公司 一种工程机械应急转向系统
CN113879391B (zh) * 2021-08-31 2022-11-08 三一汽车起重机械有限公司 一种转向液压系统及起重机
CN215436585U (zh) * 2021-09-03 2022-01-07 徐州徐工矿业机械有限公司 一种基于液压桥路的应急转向系统及工程机械

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH111171A (ja) * 1997-06-13 1999-01-06 Komatsu Ltd 油圧式自走車両の緊急油圧操舵装置
JP2001219857A (ja) * 2000-02-09 2001-08-14 Kayaba Ind Co Ltd 車両の油圧式パワーステアリング装置
JP2013151258A (ja) * 2012-01-26 2013-08-08 Isuzu Motors Ltd パワーステアリングシステム、車両、及びその制御方法。
CN104210541A (zh) * 2014-08-26 2014-12-17 三一汽车起重机械有限公司 车辆应急转向系统及轮式起重机
CN106494500A (zh) * 2016-10-21 2017-03-15 贵州詹阳动力重工有限公司 一种应急转向系统、工程机械
CN215154999U (zh) * 2021-04-21 2021-12-14 三一汽车起重机械有限公司 一种全液压应急转向系统及工程机械
CN114179906A (zh) * 2021-12-24 2022-03-15 三一汽车起重机械有限公司 应急转向系统及作业车辆

Also Published As

Publication number Publication date
CN114590314A (zh) 2022-06-07

Similar Documents

Publication Publication Date Title
EP2598393B1 (en) Power steering system for a vehicle
CN103192872B (zh) 混合驱动的电动液压助力转向系统及其控制方法
CN114179906B (zh) 应急转向系统及作业车辆
CN106741154B (zh) 起重机的转向控制系统及汽车起重机
WO2014166313A1 (zh) 新能源汽车及其混合驱动的电动液压助力转向系统
CN110962919B (zh) 一种主动电液耦合转向系统及车辆
WO2023178797A1 (zh) 应急转向系统、底盘和作业机械
CN111943091B (zh) 一种叉车液压转向的控制方法及液压转向系统
CN204488912U (zh) 一种蓄能式车辆液力转向安全辅助装置
CN216761891U (zh) 转向系统及作业机械
KR100962800B1 (ko) 대형 상용차의 파워 스티어링 시스템
CN108443247B (zh) 叉车独立液压转向系统
CN211494217U (zh) 防掉高压转向辅助装置
CN113895515A (zh) 一种助力转向系统及车辆
CN106240634A (zh) 铰接式双向驾驶车辆全液压转向系统
CN217294650U (zh) 一种车辆液压转向系统的应急补偿回路
JPS6256816B2 (zh)
CN108974118B (zh) 一种车辆及其行车辅助系统
JP4968098B2 (ja) 作動流体の回路
CN117302343A (zh) 转向系统及其控制方法和起重机
CN216468411U (zh) 静音液压舵机
CN220785899U (zh) 一种应急转向液压系统及收获机
CN221293767U (zh) 一种开芯应急液压转向系统以及收获机
CN221251429U (zh) 一种兼容有人驾驶和无人驾驶转向功能的中小流量液压转向系统
CN109131548A (zh) 一种重型铰接式车辆先导控制高压大流量液压转向系统

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22932854

Country of ref document: EP

Kind code of ref document: A1