CN115556823B - Multi-wheel steering system based on safety redundancy and vehicle - Google Patents
Multi-wheel steering system based on safety redundancy and vehicle Download PDFInfo
- Publication number
- CN115556823B CN115556823B CN202211439121.7A CN202211439121A CN115556823B CN 115556823 B CN115556823 B CN 115556823B CN 202211439121 A CN202211439121 A CN 202211439121A CN 115556823 B CN115556823 B CN 115556823B
- Authority
- CN
- China
- Prior art keywords
- port
- steering
- valve
- front group
- emergency
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
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
- B62D5/061—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle provided with effort, steering lock, or end-of-stroke limiters
-
- 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
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention relates to a multi-wheel steering system and a vehicle based on safety redundancy, which comprise a front group steering system, a rear group steering system and an emergency steering system; the invention comprises a front group steering system, a rear group steering system and an emergency steering power-assisted system, which jointly realize two modes of front group steering and multi-wheel steering of a vehicle; when the vehicle selects a front group steering mode, the front group of wheels are steered, and the rear group of wheels are locked in a centering way; when a multi-wheel steering mode is selected, the front group steering is a main steering system, all the steering modes play a role, and when the hydraulic power assistance of the front group steering fails, the emergency steering power assistance system provides the hydraulic power assistance of the front group; the invention is applied to heavy and ultra-heavy vehicles, can adjust individual hydraulic pipelines without increasing the cost of the whole vehicle and changing the configuration of the system, and realizes the flow supplement of the rear group steering system with the minimum change.
Description
Technical Field
The invention relates to the technical field of vehicle steering systems, in particular to a safety redundancy-based multi-wheel steering system and a vehicle.
Background
Modern transportation carries heavy and large-scale development requirements, and vehicles matched with the modern transportation also synchronously develop heavy and multi-axis. Therefore, high requirements are put on the steering system, such as the size of the minimum turning diameter, the safe reliability of the steering system and the like, and the conventional front group steering mode cannot meet the use requirements of the vehicle. When the vehicle turns in a narrow space or a multi-axle vehicle with more than 5 axles runs on a four-level road, more axles are needed to participate in turning, so that the turning diameter is reduced, and the trafficability is improved. When the vehicle leaves a narrow space, the vehicle can run at a high speed in a front group steering mode, and the maneuvering capacity of the vehicle is met.
Meanwhile, the vehicle type with the multi-wheel steering function has the advantages that the number of steering axles is large, the single axle bears heavy weight, the number of matched power cylinders and the cylinder diameter are increased, and the required flow of a steering system is greatly improved. Because the chassis power take-off mouth is limited, and will satisfy the power take-off demand of systems such as cooling, suspension and facial make-up, consequently to the less many rounds of steering motorcycle types of flow demand, steering system generally adopts the arrangement pattern of dual pump, when the required flow of steering system is bigger, then adopts the arrangement pattern of two independent big discharge capacity single pumps, and the chassis receives the restriction in engine space, and the scope that the oil pump discharge capacity increases is limited, to the motorcycle type that the flow demand is very big, often can't satisfy steering system's flow demand. Therefore, in the conventional engine common rotating speed range, matching the oil pump capable of meeting the flow required by the steering system becomes a difficulty.
Disclosure of Invention
The invention aims to provide a multi-wheel steering system and a vehicle based on safety redundancy aiming at the defects of the prior art, which are applied to heavy and ultra-heavy vehicles, realize the purpose of meeting the maneuvering capability of the vehicle in a multi-axle, and only adjust individual hydraulic pipelines without increasing the cost of the whole vehicle and changing the configuration of the system, thereby realizing the flow supplement of a rear group of steering systems with the minimum change.
The invention is realized by adopting the following technical scheme:
a multi-wheel steering system based on safety redundancy comprises a front group steering system, a rear group steering system and an emergency steering system; the front group steering system comprises a front group oil pump, a steering engine, a front group steering power cylinder, a centering cylinder and a first electromagnetic reversing valve; the rear group steering system comprises a rear group oil pump, a multi-way valve, a rear group steering power cylinder and a second electromagnetic reversing valve; the emergency steering system comprises an emergency pump and an emergency valve; the hydraulic steering system is characterized in that the front group oil pump and the emergency pump are respectively connected with a P6 port and a P7 port of the emergency valve, a T6 port of the emergency valve is respectively connected with a P4 port of the rear group oil pump and a P4 port of the multi-way valve, a working port of the multi-way valve is connected to the rear group steering power cylinder, the rear group steering power cylinder is connected to a C5 port and a B5 port of the electromagnetic directional valve II, an A6 port of the emergency valve is respectively connected with a P3 port of a steering machine and a C8 port of the electromagnetic directional valve I, a working port of the steering machine is connected to the front group steering power cylinder, and an A8 port of the electromagnetic directional valve I is connected to the centering cylinder.
As a further explanation of the invention, a hydraulic oil tank is also included; the front group oil pump, the rear group oil pump, a T3 port of the steering engine, the emergency pump, Y4 and T4 ports of the multi-way valve, an A5 port of the second electromagnetic directional valve, a B8 port of the first electromagnetic directional valve and the centering cylinder are respectively connected with the hydraulic oil tank.
As a further explanation of the invention, the front group steering system further comprises a flow control valve; the port P1 of the flow control valve is connected with the front group oil pump, the port A1 of the flow control valve is connected with the port P6 of the emergency valve, and the port B1 of the flow control valve is respectively connected with the hydraulic oil tank.
As a further description of the invention, the front group steering system further comprises a first overflow valve and a second overflow valve; the P2 port of the first overflow valve is connected between the A1 port of the flow control valve and the P6 port of the emergency valve, and the T2 port of the first overflow valve is connected between the hydraulic oil tank and the T3 port of the steering engine; and a P9 port of the second overflow valve is connected between an A8 port of the first electromagnetic directional valve and the centering cylinder, and a T9 port of the second overflow valve is connected between the hydraulic oil tank and the centering cylinder.
As a further explanation of the invention, the rear group steering system further comprises a filter; the front group oil pump and the emergency pump are respectively connected with the hydraulic oil tank through the filter.
As a further explanation of the invention, the front group steering system further comprises an accumulator; and the front and the back of the energy accumulator are respectively provided with a one-way valve, and the A6 port of the emergency valve is connected with the C8 port of the first electromagnetic directional valve through the one-way valve.
As a further explanation of the invention, a PLC controller is also included; the front group of steering power cylinders, the electromagnetic directional valve I, the rear group of steering power cylinders, the electromagnetic directional valve II and the multi-way valve are respectively in control connection with a PLC controller.
A vehicle comprising a safety redundancy based multi-wheel steering system as claimed in any one of the preceding claims.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention comprises a front group steering system, a rear group steering system and an emergency steering power-assisted system, which jointly realize two modes of front group steering and multi-wheel steering of a vehicle; when the vehicle selects a front group steering mode, the front group of wheels are steered, and the rear group of wheels are locked in a centering way; when a multi-wheel steering mode is selected, the front group steering is a main steering system, all the steering modes play a role, and when the hydraulic power assistance of the front group steering fails, the emergency steering power assistance system provides the hydraulic power assistance of the front group; the invention is applied to heavy and ultra-heavy vehicles, can be applied to multiple bridges, does not increase the cost of the whole vehicle and does not change the system configuration, and only adjusts individual hydraulic pipelines to realize the flow supplement of a rear group steering system with the minimum change.
Drawings
The invention is further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of the safety redundancy based multi-wheel steering system of the present invention;
fig. 2 is a schematic view of the application of the safety redundancy based multi-wheel steering system of the present invention on a heavy vehicle.
Description of the reference numerals
1. A hydraulic oil tank; 2. a filter; 3. a front group oil pump; 4. a rear group oil pump; 5. a flow control valve; 6. a first overflow valve; 7. a steering machine; 8. a front group of steering cylinders; 9. a PLC controller; 10. a multi-way valve; 11. a rear group of steering cylinders; 12. a second electromagnetic directional valve; 13. an emergency valve; 14. an emergency pump; 15. an accumulator; 16. a first electromagnetic directional valve; 17. an overflow valve II; 18. a centering cylinder; 141-first emergency pump; 142-a second emergency pump; 81-a bridge booster cylinder; 82-a second bridge booster cylinder; 111-a four-bridge cylinder; 112-five bridge boosting cylinder; 113-six bridge boosting cylinder; 181-four-bridge centering cylinder; 182-five-bridge centering cylinder; 183-six bridge centering cylinder.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows:
description of the drawings: the emergency control system comprises a flow control valve 5, an overflow valve I6, an overflow valve II 17, a steering engine 7 and an emergency valve 13, wherein a port P is a pressure oil port, namely an oil inlet; the T port is an oil return port; the ports A and B are direction control ports, namely a rod cavity or a rodless cavity which respectively controls oil to flow to the oil cylinder; the Y port is an external oil drainage port; the working principle of the first electromagnetic directional valve 16 is as follows: when the front group turns, the first electromagnetic directional valve 16 is in a power-off state, the port A8 is communicated with the port C8, and the port A8 is disconnected with the port B8; when the multi-wheel steering is carried out, the first electromagnetic directional valve 16 is in a power-on state, the port A8 is communicated with the port B8, and the port A8 is disconnected with the port C8; the second electromagnetic directional valve 12 works according to the following principle: when the front group turns, the second electromagnetic directional valve 12 is in a power-off state, the port A5 is communicated with the port B5, and the port A5 is communicated with the port C5; when the multi-wheel steering is carried out, the second electromagnetic directional valve 12 is in an electrified state, the port A5 is disconnected with the port B5, and the port A5 is disconnected with the port C5; principle of the emergency valve 13: when the flow of hydraulic oil input from the port P6 of the emergency valve 13 is normal, hydraulic oil input from the port P7 is output from the port T6; when the flow of the hydraulic oil input from the port P6 is abnormal, the hydraulic oil input from the port P7 is output from the port A6; as shown in FIG. 1, a multi-wheel steering system based on safety redundancy is applied to heavy and ultra-heavy vehicles, and comprises a front group steering system, a rear group steering system and an emergency steering power-assisted system, which are used for realizing two modes of front group steering and multi-wheel steering of the vehicle under the combined action; when the vehicle selects a front group steering mode, the front group of wheels are steered, and the rear group of wheels are locked in a centering way; when a multi-wheel steering mode is selected, the front group steering is a main steering system, all the steering modes play a role, and when the hydraulic power assistance of the front group steering fails, the emergency steering power-assisted system provides the hydraulic power assistance of the front group; the front group steering system comprises a front group oil pump 3, a steering engine 7, a front group steering power cylinder 8, a centering cylinder 18, a first electromagnetic directional valve 16, a first overflow valve 6, a second overflow valve 17, a flow control valve 5 and a filter 2; the rear group steering system comprises a rear group oil pump 4, a multi-way valve 10, a rear group steering power cylinder 11 and a second electromagnetic directional valve 12; the emergency steering system comprises an emergency valve 13 and an emergency pump 14;
when the front group steering mode is selected, hydraulic oil output by a front group oil pump 3 enters a P6 port of an emergency valve 13 through a flow control valve 5 and an overflow valve I6, the hydraulic oil is output to a steering machine 7 and a centering cylinder 18 through an A6 port of the emergency valve 13, a steering wheel is operated by a driver, the steering machine 7 drives a steering rod to be tied to a front group steering power cylinder 8 to realize steering of front group wheels under the assistance of the power of the front group steering power cylinder 8, a PLC (programmable logic controller) 9 controls a first electromagnetic directional valve 16 to control high-pressure locking of the centering cylinder 18, and a second electromagnetic directional valve 12 controls a rear group steering power cylinder 11 to be in a low-pressure follow-up state; the accumulator 15 is arranged in the centering loop formed by the port A6 of the emergency valve 13 and the first electromagnetic reversing valve 16, so that the centering loop can not maintain a centering state because the pressure of the centering cylinder 18 is slightly reduced due to internal leakage in the centering loop in the mode. The front and the back of the energy accumulator 15 are respectively provided with a one-way valve, and the pressure of the centering loop and the pressure of the front group of steering systems are mutually related and independent; when the vehicle is running, the hydraulic oil output by the emergency pump 14 directly returns to the hydraulic oil tank 1 through the T6 port of the emergency valve 13 and the hydraulic oil output by the rear group oil pump 4 through the multi-way valve 10; in the front group steering mode, the centering cylinder 18 of the rear group of wheels and the front group steering system share one hydraulic pump, namely a front group oil pump 3; when the multi-wheel steering mode is selected, the centering cylinder 18 is switched to a low-pressure follow-up state by controlling the first electromagnetic directional valve 16; switching the rear group steering power-assisted cylinder 11 to a pressure-building working state by controlling a second electromagnetic directional valve 12; hydraulic oil output by the front group of oil pumps 3 enters the emergency valve 13 and the steering engine 7 after passing through the flow control valve 5 and the overflow valve I6, and steering of front group steering wheels is realized by controlling a steering wheel by a driver; when the vehicle is running, hydraulic oil output by the emergency pump 14 is input through the port P7 of the emergency valve 13 and then output through the port T6, enters the port P4 of the multi-way valve 10 together with hydraulic oil output by the rear group of oil pumps 4, is calculated by the PLC 9 according to a piston displacement signal of the front group of steering cylinders 8 acquired by the displacement sensor of the front group of steering cylinders 8, and then controls the opening flow of each group of outlets of the multi-way valve 10, and the hydraulic oil with different flow is distributed to different oil cavities of the rear group of steering cylinders 11 of different axles, so that the rear group of wheels can be steered according to the proportion.
When the multi-wheel steering mode is switched to the front group steering mode, the centering cylinder 18 is finally enabled to enter a pressure building working state by controlling the power-on and power-off states of the first electromagnetic directional valve 16, the second electromagnetic directional valve 12 and the multi-way valve 10, and the rear group steering power cylinder 11 is enabled to enter a low-pressure oil return follow-up state, so that the rear group wheels are centered and locked; when the hydraulic oil output of the front group oil pump 3 is in an abnormal state, the emergency steering system is switched to, the emergency valve 13 inputs the hydraulic oil output by the emergency pump 14 through the port P7 and outputs the hydraulic oil through the port A6 to enter the steering machine 7 and the centering cylinder 18, and the steering assistance of the front group steering system is ensured.
The number of the steering axles of the front group of steering systems can be one or more; the number of the steering axles of the rear group steering system can be one or more.
As shown in fig. 2, the safety redundancy-based multi-wheel steering system is applied to a heavy vehicle, taking the heavy vehicle as an example; the front group of oil pumps 3 and the rear group of oil pumps 4 are arranged at a power take-off port of an engine, the emergency pump 14 is arranged on a middle shaft of a transfer case, and other hydraulic elements are arranged on a frame or other chassis structural parts; the PLC 9 is shared by PLC on the vehicle, the hydraulic oil tank 1 is shared by the hydraulic oil tank on the vehicle, and a steering mode switch and a forced centering switch on a cab instrument respectively control a steering mode, a four-axle centering cylinder 181, a five-axle centering cylinder 182 and a six-axle centering cylinder 183; when the vehicle is in a front group steering mode, hydraulic oil output by the front group oil pump 3 enters from a port P6 of the emergency valve 13, is output through a port A6 and then enters the steering machine 7, the four-axle centering cylinder 181, the five-axle centering cylinder 182 and the six-axle centering cylinder 183, and steering of front group steering wheels and straight-going centering locking of rear group steering wheels are realized. During running, hydraulic oil provided by the first emergency pump 141 and the second emergency pump 142 enters the emergency valve 13 through the port P7, enters the rear group steering system through the port T6, and returns to the oil tank through the multi-way valve 10.
When the vehicle is in a multi-wheel steering mode, hydraulic oil output by the front group oil pump 3 enters from a port P6 of the emergency valve 13, enters the steering machine 7 after being output from a port A6, and enters the first axle power cylinder 81 and the second axle power cylinder 82 from the steering machine 7 according to the operation of a driver on a steering wheel, so that the steering assistance of the front group is realized; during driving, when the front group oil pump 3 outputs oil normally, the hydraulic oil output by the first emergency pump 141 and the second emergency pump 142 enters the port T6 after passing through the port P7 of the emergency valve 13, and the hydraulic oil output by the rear group oil pump 4 passes through the multi-way valve 10, and then the PLC controller 9 controls the opening flow of the multi-way valve 10 according to the displacement signal collected by the displacement sensor inside the first bridge cylinder 81, and distributes the hydraulic oil to the four bridge cylinders 111, the five bridge cylinders 112 and the six bridge cylinders 113 of the rear group steering cylinders through the multi-way valve 10, so as to supplement the flow of the rear group steering system, thereby achieving the steering of the rear group wheels. When the front group of steering power-assisted systems breaks down during driving, hydraulic oil output by the first emergency pump 141 and the second emergency pump 142 is input into the front group of steering power-assisted systems through the A6 port of the emergency valve 13, so that the front group of steering power-assisted systems under emergency conditions are realized; when the vehicle runs in a multi-wheel steering mode and the vehicle speed is less than a limited vehicle speed v, a driver can switch a steering mode switch on a cab instrument manually, and the multi-wheel steering mode is switched to a front group steering mode; when the vehicle speed exceeds the limited vehicle speed v, the vehicle-mounted control program automatically switches to the front group mode to ensure the driving safety. In any mode, the front group steering mode is entered, the on-off state of the first electromagnetic directional valve 16, the second electromagnetic directional valve 12 and the multi-way valve 10 is controlled, finally the four-axle centering cylinder 181, the five-axle centering cylinder 182 and the six-axle centering cylinder 183 enter the pressure building working state, and the four-axle cylinder 111, the five-axle cylinder 112 and the six-axle cylinder 113 enter the low-pressure oil return follow-up state, so that the rear group of wheels are centered and locked.
When the vehicle runs and the hydraulic oil output from the front group oil pump 3 is in an abnormal state, the vehicle enters emergency steering, the emergency valve 13 inputs the hydraulic oil output from the first emergency pump 141 and the second emergency pump 142 through the port P7 and outputs the hydraulic oil through the port A6 to the steering engine 7, the four-axle centering cylinder 181, the five-axle centering cylinder 182 and the six-axle centering cylinder 183, so as to ensure the steering assistance of the front group steering system.
Under the preceding group mode of turning to, when hydraulic components such as four-axle centering cylinder 181, five-axle centering cylinder 182, six-axle centering cylinder 183, energy storage ware 15 or electromagnetic directional valve 16 broke down, the preceding group mode will become invalid, and PLC controller 9 automatic switch is the helping hand cylinder centering, reminds the driver in step on the instrument: "has switched to cylinder centering". The vehicle can be ensured to run at high speed in a front group mode; if the steering mode switch or the PLC 9 and the like have faults, a forced centering switch on the vehicle can be pressed to enter a forced centering state, the vehicle is driven in a front group mode, and the steering mode can be selected until the faults are repaired. The safety and reliability of the multi-wheel steering system are improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A multi-wheel steering system based on safety redundancy is characterized in that the system is applied to heavy, ultra-heavy and multi-axle vehicles; the system comprises a front group steering system, a rear group steering system and an emergency steering system; the front group steering system comprises a front group oil pump (3), a steering engine (7), a front group steering power cylinder (8), a centering cylinder (18) and a first electromagnetic directional valve (16); the rear group steering system comprises a rear group oil pump (4), a multi-way valve (10), a rear group steering power cylinder (11) and a second electromagnetic directional valve (12); the emergency steering system comprises an emergency pump (14) and an emergency valve (13);
the front group oil pump (3) and the emergency pump (14) are respectively connected with a P6 port and a P7 port of an emergency valve (13), a T6 port of the emergency valve (13) is respectively connected with a P4 port of a rear group oil pump (4) and a multi-way valve (10), a working port of the multi-way valve (10) is connected to a rear group steering power cylinder (11), the rear group steering power cylinder (11) is connected to C5 and B5 ports of a second electromagnetic reversing valve (12), an A6 port of the emergency valve (13) is respectively connected with a P3 port of a steering machine (7) and a C8 port of a first electromagnetic reversing valve (16), a working port of the steering machine (7) is connected to a front group steering power cylinder (8), and an A8 port of the first electromagnetic reversing valve (16) is connected to a centering cylinder (18);
the hydraulic oil tank (1); the front group oil pump (3), the rear group oil pump (4), a T3 port of a steering engine (7), an emergency pump (14), Y4 and T4 ports of a multi-way valve (10), an A5 port of a second electromagnetic directional valve (12), a B8 port of a first electromagnetic directional valve (16) and a centering cylinder (18) are respectively connected with the hydraulic oil tank (1);
the front group steering system further comprises an accumulator (15); the front and the back of the energy accumulator (15) are respectively provided with a one-way valve, and the A6 port of the emergency valve (13) and the C8 port of the first electromagnetic directional valve (16) are connected with the energy accumulator (15) through the one-way valves;
the device also comprises a PLC (9); the front group of steering cylinders (8), the first electromagnetic directional valve (16), the rear group of steering cylinders (11), the second electromagnetic directional valve (12) and the multi-way valve (10) are respectively in control connection with a PLC (programmable logic controller) controller (9).
2. A safety redundancy based multi-wheel steering system according to claim 1, wherein the front group steering system further comprises a flow control valve (5); the port P1 of the flow control valve (5) is connected with the front group oil pump (3), the port A1 of the flow control valve (5) is connected with the port P6 of the emergency valve (13), and the port B1 of the flow control valve (5) is respectively connected with the hydraulic oil tank (1).
3. A safety redundancy based multiple wheel steering system according to claim 2 wherein the front group steering system further comprises a first overflow valve (6) and a second overflow valve (17); a P2 port of the overflow valve I (6) is connected between an A1 port of the flow control valve (5) and a P6 port of the emergency valve (13), and a T2 port of the overflow valve I (6) is connected between the hydraulic oil tank (1) and a T3 port of the steering engine (7);
and a P9 port of the second overflow valve (17) is connected between an A8 port of the first electromagnetic directional valve (16) and the centering cylinder (18), and a T9 port of the second overflow valve (17) is connected between the hydraulic oil tank (1) and the centering cylinder (18).
4. A safety redundancy based multi-wheel steering system according to claim 3, wherein the rear group steering system further comprises a filter (2); the front group oil pump (3) and the emergency pump (14) are respectively connected with the hydraulic oil tank (1) through the filter (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211439121.7A CN115556823B (en) | 2022-11-17 | 2022-11-17 | Multi-wheel steering system based on safety redundancy and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211439121.7A CN115556823B (en) | 2022-11-17 | 2022-11-17 | Multi-wheel steering system based on safety redundancy and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115556823A CN115556823A (en) | 2023-01-03 |
| CN115556823B true CN115556823B (en) | 2023-03-03 |
Family
ID=84770729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211439121.7A Active CN115556823B (en) | 2022-11-17 | 2022-11-17 | Multi-wheel steering system based on safety redundancy and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115556823B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001010517A (en) * | 1999-06-29 | 2001-01-16 | Nissan Diesel Motor Co Ltd | Power steering system for vehicle |
| CN104564880A (en) * | 2014-12-29 | 2015-04-29 | 中联重科股份有限公司 | Rear axle steering valve group, axle steering centering hydraulic control system and vehicle |
| CN112550445A (en) * | 2020-01-10 | 2021-03-26 | 北京航天发射技术研究所 | Hydraulic power-assisted steering system |
| CN213442761U (en) * | 2020-11-02 | 2021-06-15 | 湖北航天技术研究院特种车辆技术中心 | Four-axis grouping steering system |
| CN114475772A (en) * | 2020-11-13 | 2022-05-13 | 秦皇岛天业通联重工科技有限公司 | Automobile emergency steering system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007290408A (en) * | 2006-04-20 | 2007-11-08 | Kobelco Cranes Co Ltd | Multi-axle vehicle |
| CN101947975A (en) * | 2010-09-28 | 2011-01-19 | 中国三江航天工业集团公司特种车辆技术中心 | Numerical-control rear-combined steering control device |
-
2022
- 2022-11-17 CN CN202211439121.7A patent/CN115556823B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001010517A (en) * | 1999-06-29 | 2001-01-16 | Nissan Diesel Motor Co Ltd | Power steering system for vehicle |
| CN104564880A (en) * | 2014-12-29 | 2015-04-29 | 中联重科股份有限公司 | Rear axle steering valve group, axle steering centering hydraulic control system and vehicle |
| CN112550445A (en) * | 2020-01-10 | 2021-03-26 | 北京航天发射技术研究所 | Hydraulic power-assisted steering system |
| CN213442761U (en) * | 2020-11-02 | 2021-06-15 | 湖北航天技术研究院特种车辆技术中心 | Four-axis grouping steering system |
| CN114475772A (en) * | 2020-11-13 | 2022-05-13 | 秦皇岛天业通联重工科技有限公司 | Automobile emergency steering system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115556823A (en) | 2023-01-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2927093B1 (en) | Follow-up steering control system of multi-axle automobile crane and multi-axle automobile crane | |
| US11618294B2 (en) | Active-passive dual mode switchable vehicle suspension system and switching method therefor | |
| CN201784677U (en) | Steering boosting middle cylinder, axle hydraulic steering system and runabout crane | |
| CN107856732B (en) | Electro-hydraulic steering hydraulic system for multi-mode control | |
| CN102935861B (en) | Multi-axle vehicle and steering control system and steering control method thereof | |
| CN103963825A (en) | Steering system and independent suspension wheel type overload vehicle | |
| CN105438256A (en) | Steering controlling method and device and crane | |
| CN108556910B (en) | All-wheel steering system | |
| WO2015024399A1 (en) | Turning system and heavy-load wheeled vehicle having independent suspension | |
| CN109911009B (en) | Full-hydraulic steering system and method for underground metal mine concrete mixer truck | |
| CN110285102B (en) | Multi-shaft emergency rescue vehicle hydraulic steering control system with active suspension | |
| CN115556823B (en) | Multi-wheel steering system based on safety redundancy and vehicle | |
| CN111301518A (en) | Rear axle electro-hydraulic power steering system and control method thereof | |
| CN202669912U (en) | Crane and automatic centering steering system thereof | |
| CN102424001A (en) | Four-axle automobile chassis and automobile crane with same | |
| CN213862398U (en) | Multi-mode steering device of snow sweeper | |
| CN204055960U (en) | A kind of multi-axle off-road vehicle all-wheel steering device | |
| CN112550445B (en) | Hydraulic power-assisted steering system | |
| CN212473643U (en) | Hydraulic auxiliary control electric independent steering system and electric vehicle | |
| CN209814088U (en) | Full-hydraulic steering system of underground concrete mixer truck for metal mine | |
| CN102874309A (en) | Crane as well as steering system and rocker arm thereof | |
| CN109955673A (en) | A kind of hydro-pneumatic suspension system and a kind of vehicle | |
| CN207916493U (en) | Hydro-pneumatic suspension system and vehicle | |
| CN208760742U (en) | Radial type double-cab steering hydraulic system | |
| CN113062904B (en) | Rear axle steering locking valve, hydraulic system and automobile crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |