CN115402405A - Steering system and vehicle - Google Patents
Steering system and vehicle Download PDFInfo
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- CN115402405A CN115402405A CN202211222602.2A CN202211222602A CN115402405A CN 115402405 A CN115402405 A CN 115402405A CN 202211222602 A CN202211222602 A CN 202211222602A CN 115402405 A CN115402405 A CN 115402405A
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- steering
- valve
- state
- oil
- steering mechanism
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- 230000007246 mechanism Effects 0.000 claims abstract description 81
- 239000007788 liquid Substances 0.000 claims abstract description 71
- 239000003921 oil Substances 0.000 claims abstract description 63
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Images
Classifications
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- 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
- B62D5/062—Details, component parts
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- 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
- B62D5/062—Details, component parts
- B62D5/064—Pump driven independently from vehicle engine, e.g. electric driven pump
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- 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
- B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof
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- 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
- B62D5/10—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 power unit
Abstract
The present application relates to a steering system including a reservoir, a steering mechanism assembly, and a pump assembly providing kinetic energy. The steering mechanism assembly comprises a first steering mechanism and a second steering mechanism, and the first steering mechanism and the second steering mechanism are respectively used for driving two front wheels to steer or two rear wheels to steer. When the steering valves corresponding to the first or second steering mechanisms are in different states, different interfaces corresponding to the liquid inlets of the steering valves are communicated, so that hydraulic oil enters corresponding cavities of corresponding steering oil cylinders communicated with the corresponding interfaces to drive the two front wheels or the two rear wheels to steer in corresponding directions. This application sets up first steering mechanism and second steering mechanism and turns to or two rear wheels are controlled two front wheels of vehicle respectively, have improved the flexibility ratio that whole car turned to.
Description
Technical Field
The present application relates to the field of vehicle technology, and in particular, to a steering system.
Background
The unmanned vehicle mainly depends on an intelligent driving system which is mainly based on a computer system in the vehicle to realize unmanned driving. Unmanned vehicles include heavy trucks, however, the full hydraulic steering system of which has the problem of insufficient sensitivity.
Disclosure of Invention
Based on this, it is necessary to provide a steering system for solving the problem of insufficient sensitivity of the full hydraulic steering system of the heavy truck in the related art.
According to an aspect of the present application, there is provided a steering system including:
the hydraulic oil pump comprises a liquid storage device and a control device, wherein the liquid storage device is provided with a containing cavity for containing hydraulic oil;
the steering mechanism assembly comprises a first steering mechanism and a second steering mechanism, and the first steering mechanism and the second steering mechanism respectively comprise a steering valve and a steering oil cylinder; the steering oil cylinders comprise piston rods, and the piston rods of the steering oil cylinders of the first steering mechanism and the second steering mechanism are in transmission connection with front wheels and rear wheels respectively;
and the steering valves are configured to supply oil to the steering oil cylinders by means of the pump assemblies so as to adjust the telescopic states of the piston rods of the corresponding steering oil cylinders to change the rotation angles of the front wheels or the rear wheels.
In one embodiment, the first steering mechanism and the second steering mechanism each comprise the steering valve and two steering cylinders;
the piston rods of the two steering oil cylinders of the first steering mechanism are in transmission connection with the front wheel;
the piston rods of the two steering oil cylinders of the second steering mechanism are in transmission connection with the rear wheel;
the steering valve is configured to be able to control the piston rod of a corresponding one of the two steering cylinders in an extended state and to control the piston rod of the other of the two steering cylinders in a retracted state.
In one embodiment, the steering oil cylinder further comprises a cylinder body, and the piston rod divides the corresponding cylinder body into a first cavity and a second cavity;
the steering valve is provided with a liquid inlet communicated with the accommodating cavity, a liquid outlet communicated with the accommodating cavity, a first interface and a second interface;
the first interface of the steering valve is respectively communicated with the first cavity of the first steering oil cylinder in the two corresponding steering oil cylinders and the second cavity of the second steering oil cylinder in the two corresponding steering oil cylinders;
the second interface of the steering valve is respectively communicated with the second cavity of the first steering oil cylinder in the two corresponding steering oil cylinders and the first cavity of the second steering oil cylinder in the two corresponding steering oil cylinders;
the steering valve has a first state and a second state;
when the steering valve is in the first state, the liquid inlet is communicated with the first interface, and the liquid outlet is communicated with the second interface;
and when the steering valve is in the second state, the liquid inlet is communicated with the second interface, and the liquid outlet is communicated with the first interface.
In one embodiment, the steering system includes a controller electrically connected to all of the steering valves, respectively, and configured to be able to drive the steering valves to switch from one of the first state and the second state to the other of the first state and the second state.
In one embodiment, the first steering mechanism includes a first rotation angle sensor for measuring a rotation angle of the corresponding front wheel;
the second steering mechanism comprises a second rotation angle sensor for measuring the rotation angle of the corresponding rear wheel;
the controller is electrically connected with all the first rotation angle sensors and all the second rotation angle sensors respectively so as to control the steering valve to adjust the rotation angle of the front wheel or the rear wheel to a preset angle.
In one embodiment, the steering system further comprises a liquid supply pipeline, at least two first branch pipelines in one-to-one correspondence with the steering valves, a second branch pipeline, an accumulator control valve group and an accumulator;
one end of the liquid supply pipeline is connected to the pump assembly, and the other end of the liquid supply pipeline is connected to all the first branch pipelines and the second branch pipelines respectively;
one end, far away from the liquid supply pipeline, of the first branch pipeline is connected with a corresponding steering valve so as to pump the hydraulic oil in the accommodating cavity to a liquid inlet of the steering valve;
one end, far away from the liquid supply pipeline, of the second branch pipeline is connected with the energy accumulator, and the energy accumulator control valve group is arranged on the second branch pipeline.
In one embodiment, the accumulator control valve set is provided with a liquid inlet, a liquid outlet and a pressure relief opening communicated with the accommodating cavity;
the liquid inlet and the liquid outlet are respectively communicated with the second branch pipeline;
the accumulator control valve block is configured to communicate the fluid inlet and the pressure relief port and to block the fluid inlet and the fluid outlet when the hydraulic pressure in the accumulator is greater than a preset pressure.
In one embodiment, the steering valve comprises a proportional directional valve.
In one embodiment, the pump assembly includes an electric motor and a hydraulic pump; the motor is connected with the hydraulic pump to drive the hydraulic pump to operate, and hydraulic oil in the accommodating cavity can be conveyed to the liquid inlet end of the liquid inlet channel.
In one embodiment, the pump assembly includes an electric motor and a hydraulic pump; the motor with the hydraulic pump is connected to the drive hydraulic pump operation, and makes the hydraulic oil of holding the intracavity can carry to the inlet of diverter valve.
According to another aspect of the present application, there is provided a vehicle including the steering system described above.
Based on the a steering system of this application embodiment, this application sets up two front wheels of first steering mechanism and two rear wheel of second steering mechanism control vehicle respectively and turns to, and the steering system who reaches this application can control two front wheels of vehicle again can control two rear wheels and turn to respectively to different or the same direction to the flexibility that the vehicle turned to has been improved.
For example, when the two front wheels of the vehicle are driven by the first steering mechanism to turn left, the two rear wheels of the vehicle can also be driven by the second steering mechanism to turn right. Or when the first steering mechanism drives the two front wheels of the vehicle to steer, the steering valve corresponding to the second steering mechanism is not opened, so that the two rear wheels do not steer at the moment, and only the two front wheels steer. Or when the two rear wheels of the vehicle are driven by the second steering mechanism to steer, the steering valve corresponding to the first steering mechanism is not opened, so that the two front wheels do not steer at the moment, and only the two rear wheels steer. Thus, the situations of front wheel driving, rear wheel driving, front and rear wheel driving and the like can be realized according to requirements, and the flexibility of vehicle steering can be improved.
Drawings
Fig. 1 is a system configuration diagram provided in the steering system of the present application.
Fig. 2 is a schematic structural diagram of a steering valve and a steering cylinder provided by the present application.
Description of reference numerals:
a hydraulic pump 1; a motor 2; a check valve 3; a feed liquid oil filter 4; an accumulator control valve group 5; an accumulator 6; a pressure sensor 7;
a steering valve 8; a liquid inlet 81; a liquid outlet 82; a first interface 83; a second interface 84;
a steering cylinder 9; a first cavity 91; a second chamber 92;
a return oil filter 10; a first rotation angle sensor 11; a second rotation angle sensor 12;
a first branch line 13; a second branch line 14;
a return line 15; accommodating cavity 16.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The steering system 100 provided by the present application is described below with reference to the drawings.
As shown in fig. 1, a steering system 100 of the present application includes a reservoir having a housing chamber 16 for housing hydraulic oil, a steering mechanism assembly including a first steering mechanism and a second steering mechanism each including a steering valve 8 and a steering cylinder 9, and a pump assembly. The steering oil cylinder 9 comprises a piston rod, and the piston rods of the steering oil cylinders 9 of the first steering mechanism and the second steering mechanism are respectively in transmission connection with the front wheel and the rear wheel. And a pump assembly connected to the reservoir and all the steering valves 8, respectively, the steering valves 8 being configured to be able to supply oil to the steering cylinders 9 by means of the pump assembly to adjust the telescopic state of the piston rods of the corresponding steering cylinders 9 to change the rotation angle of the front or rear wheels.
In the application, the pump assembly pressurizes the hydraulic oil in the accommodating cavity 16 and then transports the hydraulic oil to the first steering mechanism and the second steering mechanism, and the steering valves 8 of the first steering mechanism and the second steering mechanism respectively supply oil to the corresponding steering oil cylinders 9, so that steering is completed.
This application sets up two front wheels of vehicle and two rear wheel steering are controlled respectively to first steering mechanism and second steering mechanism, have improved the flexibility that the vehicle turned to. For example, when the two front wheels of the vehicle are driven to turn left by the first steering mechanism, the two rear wheels of the vehicle can also be driven to turn right by the second steering mechanism. For example, the first steering mechanism drives the two front wheels of the vehicle to steer left or right, and at the moment, the steering valve 8 corresponding to the second steering mechanism is not opened, so that the two rear wheels do not steer, and only the two front wheels steer. The two rear wheels of the vehicle can be driven to steer left or right through the second steering mechanism independently, and at the moment, the steering valve 8 corresponding to the first steering mechanism is not opened, so that the two front wheels do not steer, and only the two rear wheels steer. Thus, the situations of front wheel driving, rear wheel driving, front and rear wheel driving and the like can be realized according to requirements, and the flexibility of vehicle steering can be improved.
As shown in fig. 1, each of the first steering mechanism and the second steering mechanism includes a steering valve 8 and two steering cylinders 9. Piston rods of the two steering cylinders 9 of the first steering mechanism are in transmission connection with the front wheels, and piston rods of the two steering cylinders 9 of the second steering mechanism are in transmission connection with the rear wheels. Wherein the steering valve 8 is configured to be able to control the piston rod of one of the two corresponding steering cylinders 9 in an extended state and to control the piston rod of the other of the two corresponding steering cylinders 9 in a compressed state.
For example, when the piston rod of one of the two steering valves 8 corresponding to the first steering mechanism is in an extended state and the piston rod of the other of the two steering valves 8 is in a compressed state, the two steering cylinders 9 in different states cooperate with each other to drive the two front wheels of the vehicle to steer left or right. That is, the two steering cylinders 9 in different states cooperate with each other to drive the front axle of the vehicle to steer left or right. The first steering mechanism is similar to the first steering mechanism in the steering process, and the two corresponding steering cylinders 9 in different states are matched with each other to drive the rear axle of the vehicle to turn left or right.
As shown in fig. 1 and 2, the steering cylinder 9 further includes a cylinder body, and a piston rod divides the corresponding cylinder body into a first chamber 91 and a second chamber 92. The diverter valve 8 has an inlet 81 communicating with the accommodating chamber 16, an outlet 82 communicating with the accommodating chamber 16, a first port 83 and a second port 84. The first port 83 of the steering valve 8 is respectively communicated with the first cavity 91 of the first steering cylinder 9 of the two corresponding steering cylinders 9 and the second cavity 92 of the second steering cylinder 9 of the two corresponding steering cylinders 9. The second port 84 of the steering valve 8 is respectively communicated with the second cavity 92 of the first steering cylinder 9 of the two corresponding steering cylinders 9 and the first cavity 91 of the second steering cylinder 9 of the two corresponding steering cylinders 9. The piston rod of the first steering cylinder 9 can extend out of the first cavity 91 of the first steering cylinder 9 and is in transmission connection with the corresponding front wheel or rear wheel. The piston rod of the second steering cylinder 9 can extend out of the second chamber 92 of the second steering cylinder 9 and is in driving connection with the corresponding front or rear wheel.
It should be noted that the steering valve 8 and the two corresponding steering cylinders 9 may refer to the steering valve 8 and the two steering cylinders 9 of the first steering mechanism, and may also refer to the steering valve 8 and the two steering cylinders 9 of the second steering mechanism.
As shown in fig. 1 and 2, the steering valve 8 further includes a proportional directional valve, and the steering valve 8 has a first state and a second state. When the diverter valve 8 is in the first state, the liquid inlet 81 is communicated with the first connector 83, and the liquid outlet 82 is communicated with the second connector 84, and when the diverter valve 8 is in the second state, the liquid inlet 81 is communicated with the second connector 84, and the liquid outlet 82 is communicated with the first connector 83.
The first drive mechanism will be explained as an example:
the diverter valve 8 may be adjusted to a first state such that the inlet port 81 of the diverter valve 8 is in communication with the first port 83 and the outlet port 82 of the diverter valve 8 is in communication with the second port 84. The hydraulic oil flows from the liquid inlet 81 of the steering valve 8 to the first port 83 of the steering valve 8, and then flows into the first cavity 91 of the first steering cylinder 9 of the two corresponding steering cylinders 9 communicated with the first port 83 and the second cavity 92 of the second steering cylinder 9 of the two corresponding steering cylinders 9, so that the hydraulic oil is supplied to the corresponding cavities of the two corresponding steering cylinders 9, at this time, the piston rod of the first steering cylinder 9 of the two steering cylinders 9 is in an extending state, the second steering cylinder 9 of the two steering cylinders 9 is in a retracting state, and the two corresponding steering cylinders 9 drive the front axle of the vehicle to turn left or right.
The diverter valve 8 may also be adjusted to a second state such that the inlet port 81 of the diverter valve 8 is in communication with the second port 84 and the outlet port 82 of the diverter valve 8 is in communication with the first port 83. The hydraulic oil flows from the liquid inlet 81 of the steering valve 8 to the second port 84 of the steering valve 8, and then flows into the second cavity 92 of the first steering cylinder 9 of the two corresponding steering cylinders 9 and the first cavity 91 of the second steering cylinder 9 of the two corresponding steering cylinders 9 which are communicated with the second port 84, so that the hydraulic oil is supplied to the corresponding cavities of the two corresponding steering cylinders 9, at the moment, the piston rod of the first steering cylinder 9 of the two steering cylinders 9 is in a retracted state, the second steering cylinder 9 of the two steering cylinders 9 is in an extended state, and the two corresponding steering cylinders 9 drive the front axle of the vehicle to turn left or right.
The above-mentioned steering to the left or the right depends on the connection manner of the steering system 100 and the vehicle, and may be adjusted according to actual requirements, for example, when the piston rod of the first steering cylinder 9 is in the extended state and the second steering cylinder 9 is in the retracted state, the corresponding axle controlled is in the left-turning state, that is, the first state of the steering valve 8 is in the left-turning state, and then the corresponding second state is in the right-turning state. Correspondingly, if the piston rod of the first steering cylinder 9 is in the extended state and the corresponding axle controlled by the second steering cylinder 9 in the retracted state is in the right-turn state, that is, the first state of the steering valve 8 is in the right-turn state, then the corresponding second state is in the left-turn state. It will be appreciated that one of the first and second states is arranged to be turned in one direction and the other must be turned in the other direction.
That is to say, the steering valve 8 changes the state so that the hydraulic oil flows into the corresponding cavity of the corresponding steering cylinder 9 through the liquid inlet 81 of the steering valve 8 and the different ports, thereby controlling the corresponding axle to steer left or right.
The steering valve 8 further has a third state, when the steering valve 8 is in the third state, the liquid inlet 81 of the steering valve is not communicated with the corresponding first interface 83 or second interface 84, and the liquid outlet of the steering valve 8 is not communicated with the corresponding first interface 83 or second interface 84. That is, when the steering valve 8 is in the third state, the oil inlet, the first port 83, the oil outlet, and the second port 84 of the steering valve 8 are not communicated with each other two by two. At this time, the vehicle is in a straight-ahead state, the steering valve 8 is not energized, the steering valve 8 is in a neutral position off state, and the steering circuit is off.
As shown in fig. 1, the steering system 100 further includes a bidirectional hydraulic lock, which is disposed on a branch path connecting the corresponding steering valve 8, the first port 83 and the second port 84 corresponding to the steering valve 8, and the corresponding two steering cylinders 9, to prevent oil from flowing back, i.e., to ensure that the oil does not flow back when the cylinders are operating.
As shown in fig. 1, the steering system 100 further includes a controller electrically connected to all the steering valves 8, respectively, and configured to be able to drive the steering valves 8 to switch from one of the first state and the second state to the other of the first state and the second state. The controller is used for receiving the steering signal and then sending a corresponding steering signal to the steering valve 8 to control the steering of the steering valve, and the specific details are described below by combining a steering angle sensor, an upper computer and other components.
The first steering mechanism includes a first rotation angle sensor 11 for measuring a rotation angle of the corresponding front wheel, and the second steering mechanism includes a second rotation angle sensor 12 for measuring a rotation angle of the corresponding rear wheel. The controller is electrically connected to all the first rotation angle sensors 11 and all the second rotation angle sensors 12, respectively, to control the steering valve 8 to adjust the rotation angle of the front wheels or the rear wheels to a preset angle.
The steering system 100 further includes an upper computer for sending a steering signal to the controller. The controller is electrically connected to all the steering angle sensors, the steering valve 8 of the first steering mechanism, and the steering valve 8 of the second steering mechanism, respectively, to drive the steering valve 8 to switch from one of the first state and the second state to the other of the first state and the second state. That is, the connection of the controller and the steering valves 8 of the different steering mechanisms, respectively, can control the steering direction of the front axle and the rear axle of the vehicle, respectively.
The following description will be made by taking as an example a left turn state of the first drive mechanism and a left turn state of the first state: firstly, the upper computer sends a signal that the first driving mechanism turns left to a certain angle to the controller, the controller sends a left turning signal to the steering valve 8 corresponding to the first driving mechanism after receiving the signal through calculation, the steering valve 8 regulates and controls to enable an oil inlet of the steering valve 8 to be communicated with the first interface 83, and even if the steering valve 8 is in a first state, hydraulic oil provided by the hydraulic pump 1 and the energy accumulator 6 is conveyed into a cavity corresponding to the steering oil cylinder 9, so that the first driving mechanism drives the front axle of the vehicle to turn left. In the steering process, the turning angle sensor measures the steering angle of the left turn of the front axle of the vehicle in real time and transmits information to the controller, the controller transmits angle information to the upper computer, when the steering angle reaches a preset steering angle, the controller sends an instruction again, the steering valve 8 is powered off, the steering valve 8 returns to a middle-position disconnected state, the steering loop is disconnected, and the steering action is completed.
As shown in fig. 1, the steering system 100 further includes a fluid supply line, at least two first branch lines 13 in one-to-one correspondence with the steering valves 8, a second branch line 14, an accumulator control valve group 5, and an accumulator 6. One end of the liquid supply pipeline is connected to the pump assembly, the other end of the liquid supply pipeline is connected to all the first branch pipelines 13 and the second branch pipelines 14 respectively, one end, far away from the liquid supply pipeline, of each first branch pipeline 13 is connected with the corresponding steering valve 8, and therefore hydraulic oil in the accommodating cavity 16 is pumped to the liquid inlet 81 of the corresponding steering valve 8. One end of the second branch pipeline 14, which is far away from the liquid supply pipeline, is connected with the energy accumulator 6, and the energy accumulator control valve group 5 is arranged on the second branch pipeline 14.
The liquid supply pipeline is also provided with a one-way valve 3 and a liquid inlet oil filter 4. For single-phase flow restriction and oil filtration of the hydraulic oil which is conveyed from the receiving chamber 16 via the hydraulic pump 1 to the first branch line 13 or the second branch line 14.
When the hydraulic pressure in the oil way system is reduced to a certain degree, the hydraulic oil in the energy accumulator 6 flows into the pipeline to regulate and control the hydraulic pressure in the pipeline system to tend to be stable.
The accumulator 6 is an energy storage device, which stores the hydraulic oil in the oil circuit system in its cavity at proper time, and releases the stored hydraulic oil to supply the system again when the system needs. When the instantaneous pressure of the oil circuit system is increased, the energy of the part can be absorbed by the oil circuit system, so that the normal pressure of the whole system is ensured. Therefore, in the application, the energy accumulator 6 can provide power for the steering valve 8, and the energy accumulator 6 can be arranged in the middle of the front axle and the rear axle of the vehicle, so that the four-wheel rotation coordination is improved, and the system response time is shortened.
As shown in fig. 1, the accumulator control valve block 5 has a fluid inlet, a fluid outlet, and a pressure relief port in communication with the receiving chamber 16. The liquid inlet and the liquid outlet are respectively communicated with the second branch pipe 14. The accumulator control valve block 5 is configured to be able to communicate the fluid inlet and the pressure relief port and to block the fluid inlet and the fluid outlet when the hydraulic pressure in the accumulator 6 is greater than a preset pressure.
The energy accumulator control valve group 5 is electrically connected with the energy accumulator 6, the energy accumulator control valve group 5 and the energy accumulator 6 are further connected with a pressure sensor 7 for detecting the pressure in the energy accumulator 6, when the pressure of hydraulic oil filled in the energy accumulator 6 rises to a preset value, an overflow mechanism of the energy accumulator control valve group 5 is opened, the hydraulic oil in the control oil way is adjusted to flow to the accommodating cavity 16, and then the pressure of the system is adjusted.
As shown in fig. 1, the pump assembly includes an electric motor 2 and a hydraulic pump 1. The motor 2 is connected with the hydraulic pump 1 to drive the hydraulic pump 1 to operate, and hydraulic oil in the accommodating cavity 16 can be conveyed to the liquid inlet 81 of the steering valve 8. The hydraulic oil in the accommodating cavity 16 is driven by the motor 2 to be sucked out and pressurized by the hydraulic pump 1, flows to the corresponding steering valve 8 and then flows to the corresponding steering oil cylinder 9.
The hydraulic pump 1 can be set as a variable hydraulic pump 1, so that energy is saved, and the over-high oil temperature of the system is avoided.
As shown in fig. 1, the steering system 100 provided by the present application further includes a liquid return line 15 and a liquid return oil filter 10, wherein one end of the liquid return line 15 is connected to the accommodating chamber 16, the other end of the liquid return line 15 is connected to the liquid outlet 82 of the steering valve 8 and the pressure relief port of the accumulator control valve set 5, and the liquid return line 15 is connected to the liquid return oil filter 10. The hydraulic oil discharged from the pressure relief port of the accumulator control valve group 5 flows to the accommodation chamber 16 through the return line 15 and the return oil filter 10 provided on the return line 15. The hydraulic oil discharged from the outlet of the first chamber 91 or the second chamber 92 by the steering cylinder 9 flows to the return line 15 via the outlet end of the drain passage of the steering valve 8, and then flows back to the accommodating chamber 16 via the return oil filter 10.
The following describes a flow of controlling vehicle steering by the steering system 100 provided by the present application, taking left steering of the first steering mechanism as an example:
firstly, the vehicle is in a straight-going state, at the moment, the steering control valve is not powered, the steering loop is powered off, and the oil inlet, the first connector 83, the oil outlet and the second connector 84 of the steering valve 8 are not communicated with each other pairwise.
Then, the upper computer sends a left-turn instruction signal to the controller, the controller sends a left-turn signal to the corresponding steering valve 8 after calculating according to the received signal from the upper computer, the corresponding steering valve 8 is regulated according to the received signal so that the liquid inlet 81 of the steering valve 8 is communicated with the first interface 83, and the liquid outlet 82 of the steering valve 8 is communicated with the second interface 84, so that the motor 2 drives the hydraulic pump 1 to suck out and pressurize hydraulic oil from the accommodating cavity 16, and the hydraulic oil flows into the first cavity 91 of the first steering cylinder 9 of the two corresponding steering cylinders 9 communicated with the first interface 83 and the second cavity 92 of the second steering cylinder 9 of the two corresponding steering cylinders 9 through the accumulator 6, the accumulator control valve group 5, the liquid inlet 81 of the steering valve 8, the first interface 83 and the bidirectional hydraulic lock. At this time, the liquid outlet 82 of the steering valve 8 communicates with the second port 84, and the hydraulic oil in the second chamber 92 of the first of the two steering cylinders 9 and the first chamber 91 of the second of the two steering cylinders 9, which communicate with the second port 84, flows into the accommodating chamber 16 through the second port 84, the liquid outlet 82 and the return oil filter 10.
And when the steering is carried out, the controller feeds back the wheel steering angle measured in real time by the steering angle sensor to the upper computer, when the wheel steering angle reaches a preset angle, the controller sends out a power-off instruction again, the steering valve 8 is powered off, the steering loop is disconnected, the steering valve 8 is in a third state, and the vehicle is steered.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A steering system, comprising:
the hydraulic oil pump comprises a liquid storage device and a control device, wherein the liquid storage device is provided with a containing cavity for containing hydraulic oil;
the steering mechanism assembly comprises a first steering mechanism and a second steering mechanism, and the first steering mechanism and the second steering mechanism respectively comprise a steering valve and a steering oil cylinder; the steering oil cylinders comprise piston rods, and the piston rods of the steering oil cylinders of the first steering mechanism and the second steering mechanism are in transmission connection with front wheels and rear wheels respectively;
and the steering valves are configured to supply oil to the steering oil cylinders by means of the pump assemblies so as to adjust the telescopic states of the piston rods of the corresponding steering oil cylinders to change the rotation angles of the front wheels or the rear wheels.
2. The steering system as claimed in claim 1, wherein the first steering mechanism and the second steering mechanism each include the steering valve and two of the steering cylinders;
the piston rods of the two steering oil cylinders of the first steering mechanism are in transmission connection with the front wheel;
the piston rods of the two steering oil cylinders of the second steering mechanism are in transmission connection with the rear wheel;
the steering valve is configured to be able to control the piston rod of a corresponding one of the two steering cylinders in an extended state and to control the piston rod of the other of the two steering cylinders in a retracted state.
3. The steering system of claim 2, wherein the steering cylinder further comprises a cylinder body, the piston rod dividing the corresponding cylinder body into a first chamber and a second chamber;
the steering valve is provided with a liquid inlet communicated with the accommodating cavity, a liquid outlet communicated with the accommodating cavity, a first interface and a second interface;
the first interface of the steering valve is respectively communicated with the first cavity of the first steering oil cylinder in the two corresponding steering oil cylinders and the second cavity of the second steering oil cylinder in the two corresponding steering oil cylinders;
the second interface of the steering valve is respectively communicated with the second cavity of the first steering oil cylinder in the two corresponding steering oil cylinders and the first cavity of the second steering oil cylinder in the two corresponding steering oil cylinders;
the steering valve has a first state and a second state;
when the steering valve is in the first state, the liquid inlet is communicated with the first interface, and the liquid outlet is communicated with the second interface;
and when the steering valve is in the second state, the liquid inlet is communicated with the second interface, and the liquid outlet is communicated with the first interface.
4. A steering system according to claim 3, comprising a controller electrically connected to all of the steering valves respectively and configured to be able to drive the steering valves from one of the first state and the second state to the other of the first state and the second state.
5. The steering system according to claim 4, characterized in that the first steering mechanism includes a first rotation angle sensor for measuring a rotation angle of the corresponding front wheel;
the second steering mechanism comprises a second rotation angle sensor for measuring the rotation angle of the corresponding rear wheel;
the controller is electrically connected with all the first rotation angle sensors and all the second rotation angle sensors respectively so as to control the steering valve to adjust the rotation angle of the front wheel or the rear wheel to a preset angle.
6. The steering system according to any one of claims 1 to 5, characterized in that the steering system further comprises a liquid supply line, at least two first branch lines, second branch lines, an accumulator control valve group, and an accumulator, in one-to-one correspondence with the steering valves;
one end of the liquid supply pipeline is connected to the pump assembly, and the other end of the liquid supply pipeline is connected to all the first branch pipelines and the second branch pipelines respectively;
one end, far away from the liquid supply pipeline, of the first branch pipeline is connected with a corresponding steering valve so as to pump the hydraulic oil in the accommodating cavity to a liquid inlet of the steering valve;
one end, far away from the liquid supply pipeline, of the second branch pipeline is connected with the energy accumulator, and the energy accumulator control valve group is arranged on the second branch pipeline.
7. The steering system of claim 6, wherein said accumulator control valve block has a fluid inlet, a fluid outlet, and a pressure relief port in communication with said receiving cavity;
the liquid inlet and the liquid outlet are respectively communicated with the second branch pipeline;
the accumulator control valve block is configured to communicate the fluid inlet and the pressure relief port and to block the fluid inlet and the fluid outlet when the hydraulic pressure in the accumulator is greater than a preset pressure.
8. The steering system of any of claims 1-5, wherein the steering valve comprises a proportional directional valve.
9. The steering system of claims 1-5, wherein the pump assembly includes an electric motor and a hydraulic pump; the motor with the hydraulic pump is connected to the drive the hydraulic pump operation, and make the hydraulic oil that holds the intracavity can carry to the inlet of diverter valve.
10. A vehicle characterized by comprising a steering system according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211222602.2A CN115402405A (en) | 2022-10-08 | 2022-10-08 | Steering system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211222602.2A CN115402405A (en) | 2022-10-08 | 2022-10-08 | Steering system and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN115402405A true CN115402405A (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211222602.2A Pending CN115402405A (en) | 2022-10-08 | 2022-10-08 | Steering system and vehicle |
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| Country | Link |
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| CN (1) | CN115402405A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103465956A (en) * | 2013-09-27 | 2013-12-25 | 徐州重型机械有限公司 | Steering control valve, engineering vehicle steering system and steering striking resistant method |
| CN108791479A (en) * | 2018-06-13 | 2018-11-13 | 徐州重型机械有限公司 | Fluid-link steering control system and crane |
| CN113060209A (en) * | 2021-03-30 | 2021-07-02 | 北京科技大学 | Electro-hydraulic steering system for articulated trackless vehicle and articulated trackless vehicle |
| CN217320496U (en) * | 2022-05-27 | 2022-08-30 | 三一专用汽车有限责任公司 | Rear axle steering system, rear axle device and vehicle |
-
2022
- 2022-10-08 CN CN202211222602.2A patent/CN115402405A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103465956A (en) * | 2013-09-27 | 2013-12-25 | 徐州重型机械有限公司 | Steering control valve, engineering vehicle steering system and steering striking resistant method |
| CN108791479A (en) * | 2018-06-13 | 2018-11-13 | 徐州重型机械有限公司 | Fluid-link steering control system and crane |
| CN113060209A (en) * | 2021-03-30 | 2021-07-02 | 北京科技大学 | Electro-hydraulic steering system for articulated trackless vehicle and articulated trackless vehicle |
| CN217320496U (en) * | 2022-05-27 | 2022-08-30 | 三一专用汽车有限责任公司 | Rear axle steering system, rear axle device and vehicle |
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