CN110126913B - Hydraulic system for realizing two steering modes by controlling two-way driving switch valve group - Google Patents
Hydraulic system for realizing two steering modes by controlling two-way driving switch valve group Download PDFInfo
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- CN110126913B CN110126913B CN201910404799.3A CN201910404799A CN110126913B CN 110126913 B CN110126913 B CN 110126913B CN 201910404799 A CN201910404799 A CN 201910404799A CN 110126913 B CN110126913 B CN 110126913B
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- switch valve
- steering
- switch
- valve group
- steering gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/12—Hand levers
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Abstract
The invention discloses a hydraulic system for realizing two steering modes by controlling a bidirectional steering switch valve group, which comprises a hydraulic oil tank, a hydraulic pump, an overflow valve, a filter, an electromagnetic valve, a switch valve group, a front steering gear, a rear steering gear, a front steering oil cylinder and a rear steering oil cylinder, wherein the inlet of the hydraulic pump is connected with the hydraulic oil tank, the outlet of the hydraulic pump is sequentially connected with the overflow valve and the filter, the outlet of the filter is connected with the inlet of the electromagnetic valve, two outlets of the electromagnetic valve are respectively connected with the front steering gear and the rear steering gear, the oil return port of the electromagnetic valve is connected with the hydraulic oil tank, two outlets of the front steering gear are respectively connected with the switch valve group and the front steering oil cylinder, two outlets of the rear steering gear are respectively connected with the switch valve group and the rear steering oil cylinder, the front steering oil cylinder and the rear steering oil ports of the front steering gear are respectively connected with the hydraulic oil tank. The switching of the steering modes of the vehicle is realized through the switch valve group, the front steering gear, the rear steering gear and the hydraulic system, the steering radius of the vehicle is reduced, and the steering flexibility of the vehicle is improved.
Description
Technical Field
The invention relates to the field of vehicle steering, in particular to a hydraulic system for realizing two steering modes by controlling a bidirectional driving switch valve group.
Background
At present, vehicles driven in two directions can generally realize front wheel steering or rear wheel steering, or adopt a splayed steering mode that front and rear wheels steer simultaneously. The front wheel steering or the rear wheel steering is independently adopted, the turning radius of the vehicle is large, and the steering is not flexible enough in a narrow space; if the splayed steering mode is adopted independently, an S-shaped path is easy to generate under the working condition that the vehicle needs to walk linearly.
At present, a plurality of electromagnetic valves are adopted to work together to control the switching of steering modes on some vehicles, and the switching of a plurality of steering modes such as front wheel steering, rear wheel steering and splayed steering can be realized, but the defects of needing an electric control system to participate, complex control logic, high purchasing cost, high failure rate and the like exist, so that a simple and reliable steering mode conversion hydraulic system needs to be developed.
Disclosure of Invention
The invention provides a hydraulic system for realizing two steering modes by controlling a bidirectional driving switch valve group, and realizes the switching of a plurality of steering modes of vehicle front wheel steering, rear wheel steering, splay steering and the like through the switch valve group, a front steering gear, a rear steering gear and a corresponding hydraulic system, thereby reducing the steering radius and improving the steering flexibility of the vehicle.
In order to achieve the purpose, the invention adopts the following technical scheme:
the two-way driving switch valve group controls and realizes a hydraulic system with two steering modes, which comprises a hydraulic oil tank, a hydraulic pump, an overflow valve, a filter, an electromagnetic valve, a switch valve group, a front steering gear, a rear steering gear, a front steering oil cylinder and a rear steering oil cylinder, the inlet of the hydraulic pump is connected with a hydraulic oil tank, the outlet of the hydraulic pump is sequentially connected with an overflow valve and a filter, the outlet of the filter is connected with the inlet of an electromagnetic valve, two outlets of the electromagnetic valve are respectively connected with a front steering gear and a rear steering gear, an oil return port of the electromagnetic valve is connected with the hydraulic oil tank, two outlets of the front steering gear are respectively connected with a switch valve group and a large cavity of a front steering oil cylinder, two outlets of the rear steering gear are respectively connected with the switch valve group and a large cavity of a rear steering oil cylinder, a small cavity of the front steering oil cylinder and a small cavity of the rear steering oil cylinder are respectively connected with the switch valve group, and oil return ports of the front steering gear and the rear steering gear are respectively connected with the hydraulic oil tank.
Preferably, the switch valve group comprises five switch valves arranged in sequence, one outlet of the front steering gear is connected with a left oil port of a fifth switch valve in the switch valve group, and the other outlet of the front steering gear is connected with a left oil port of a first switch valve in the switch valve group and a large cavity of the front steering oil cylinder; one outlet of the rear steering gear is connected with the right oil port of the first switch valve in the switch valve group, and the other outlet of the rear steering gear is connected with the right oil port of the fifth switch valve in the switch valve group and the large cavity of the rear steering oil cylinder; the small cavity of the front steering oil cylinder is connected with a right oil port of a third switch valve in the switch valve group, and the small cavity of the rear steering oil cylinder is connected with a left oil port of the third switch valve in the switch valve group.
Preferably, a left oil port of a second switch valve in the switch valve group is connected with a left oil port of a third switch valve, and a right oil port of the second switch valve is connected with a right oil port of the first switch valve; and a left oil port of the fourth switch valve is connected with a left oil port of the fifth switch valve, and a right oil port of the fourth switch valve is connected with a right oil port of the third switch valve.
Preferably, all five on-off valves in the on-off valve group are manually operated valves.
Preferably, the first, third and fifth switch valves have the same switch state, and the handles of the five switch valves are connected together, which is opposite to the second and fourth switch valves.
Due to the structure, the invention has the advantages that:
1. the invention realizes the switching of the steering modes of the vehicle through the switch valve group, the front and rear steering gears and the corresponding hydraulic systems, can effectively reduce the steering radius of the vehicle and improve the steering flexibility of the vehicle.
2. The switch valve group is a combination of five switch valves, the handles are connected together, the handles are only in two states, the mode switching does not need to be controlled by an electrical system, the control logic is simple, the operation is convenient, and the performance is reliable.
3. Compared with a steering mode switching system adopting an electromagnetic reversing valve, the switching valve adopted by the invention has the advantages of low purchase cost and low maintenance cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a hydraulic schematic of the present invention;
FIG. 2 is a schematic view of a front cab splay steering mode of the present invention;
FIG. 3 is a schematic diagram of a rear cab splay steering mode of the present invention;
FIG. 4 is a front wheel steering hydraulic schematic of the present invention;
fig. 5 is a hydraulic schematic of the rear wheel steering of the present invention.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, the invention provides a switch valve group control hydraulic system for realizing two steering modes, which comprises a hydraulic pump 1, a filter 2, an electromagnetic valve 3, a switch valve group 6, a front steering gear 5, a rear steering gear 4, a front steering oil cylinder 7, a rear steering oil cylinder 8, a hydraulic oil tank 9 and an overflow valve 10.
The inlet of the hydraulic pump 1 is connected with a hydraulic oil tank 9, the outlet of the hydraulic pump is sequentially connected with an overflow valve 10 and a filter 2, the outlet of the filter 2 is connected with the inlet of an electromagnetic valve 3, two outlets of the electromagnetic valve 3 are respectively connected with the inlets of a front steering gear 5 and a rear steering gear 4 of a vehicle, and an oil return port of the electromagnetic valve 3 is connected with the hydraulic oil tank 9. The switch valve group 6 comprises five manually operated switch valves which are arranged in sequence, one outlet of the front steering gear 5 is connected with a left oil port of a fifth switch valve 65 in the switch valve group 6, and the other outlet is connected with a left oil port of a first switch valve 61 in the switch valve group 6 and a large cavity of the front steering oil cylinder 7; one outlet of the rear steering gear 4 is connected with the right oil port of the first switch valve 61 in the switch valve group 6, and the other outlet is connected with the right oil port of the fifth switch valve 65 in the switch valve group 6 and the large cavity of the rear steering oil cylinder 8; the small cavity of the front steering oil cylinder 7 is connected with the right oil port of the third switch valve 63 in the switch valve group 6, and the small cavity of the rear steering oil cylinder 8 is connected with the left oil port of the third switch valve 63 in the switch valve group 6; the oil return ports of the front steering gear 5 and the rear steering gear 4 are respectively connected with a hydraulic oil tank 9.
A left oil port of a second switch valve 62 of the switch valve group 6 is connected with a left oil port of a third switch valve 63, and a right oil port of the second switch valve 62 is connected with a right oil port of a first switch valve 61; the left oil port of the fourth switch valve 64 is connected with the left oil port of the fifth switch valve 65, and the right oil port of the fourth switch valve 64 is connected with the right oil port of the third switch valve 63. The first, third and fifth switch valves 61, 63 and 65 have the same switch state, and the handles of the five switch valves are connected together, which is opposite to the states of the second and fourth switch valves 62 and 64. The handle of the manual operation switch valve group can make five switch valves realize different switch states, thereby realizing the transformation of a steering oil circuit. When the handle of the switch valve group 6 is downward, the switch states of the five switch valves of the switch valve group 6 are sequentially switched on and off, and when the handle of the switch valve group 6 is upward, the switch states of the five switch valves of the switch valve group 6 are sequentially switched off and off.
The working principle of the invention is as follows:
1. splay steering mode of the front cab:
as shown in fig. 2, when the electromagnetic valve 3 operates in the right position and the handle of the switch valve group 6 is downward, the switch states of the five switch valves of the switch valve group 6 are sequentially switch on, and the system is in the splayed steering mode of the front cab. Pressure oil from the hydraulic pump 1 enters an oil inlet P of a front steering gear 5 through an overflow valve 10, a filter 2 and an electromagnetic valve 3, the front steering gear 5 turns right, hydraulic oil comes out from an oil port of the front steering gear CR and enters a large cavity of a rear steering oil cylinder 8 through a fifth switch valve 65 of a switch valve group 6 to push the rear steering oil cylinder 8 to turn, pressure oil in a small cavity of the rear steering oil cylinder 8 enters a small cavity of a front steering oil cylinder 7 through a third switch valve 63 of the switch valve group 6 to push the front steering oil cylinder 7 to turn, and front and rear steering linkage is realized; after pressure oil from the large cavity of the front steering oil cylinder 7 enters the front steering gear 5, the pressure oil returns to the hydraulic oil tank 9 from an oil return port T of the front steering gear 5, and therefore the splayed steering mode of the front cab is achieved. When the front steering gear 5 turns left, the operation process is reversed.
2. Splay steering mode of the rear cab:
as shown in fig. 3, when the electromagnetic valve 3 operates in the left position and the handle of the switch valve group 6 is turned down, the switch states of the five switch valves of the switch valve group 6 are sequentially switched on and off, and the system is in the splayed steering mode of the rear cab. The steering working process is similar to the splayed steering mode of the front cab, pressure oil from the hydraulic pump 1 enters an oil inlet P of the rear steering gear 4 through the overflow valve 10, the filter 2 and the electromagnetic valve 3, then exits from an oil port of the rear steering gear CR and enters a large cavity of the rear steering oil cylinder 8 to push the rear steering oil cylinder 8 to steer, pressure oil in a small cavity of the rear steering oil cylinder 8 enters a small cavity of the front steering oil cylinder 7 through a third switch valve 63 of the switch valve group 6 to push the front steering oil cylinder 7 to steer, and front and rear steering linkage is realized; pressure oil from the large cavity of the front steering oil cylinder 7 enters the rear steering gear 4 through the first switch valve 61 of the switch valve group 6, and then returns to the hydraulic oil tank 9 from the oil return port T of the rear steering gear 4, so that the splayed steering mode of the rear cab is realized. When the rear steering gear 4 is reversed, the operation is reversed.
3. Front wheel steering mode:
as shown in fig. 4, when the electromagnetic valve 3 is operated in the right position and the handle of the switch valve group 6 is upward, the switch states of the five switch valves of the switch valve group 6 are sequentially switch-off switches, and the system is in the front wheel steering mode.
Pressure oil from the hydraulic pump 1 enters an oil inlet P of the front steering gear 5 through the overflow valve 10, the filter 2 and the electromagnetic valve 3, enters a large cavity of the front steering oil cylinder 7 through an oil port of the front steering gear CL, pushes the front steering oil cylinder 7 to steer, and returns to the hydraulic oil tank 9 from an oil return port T of the front steering gear 5 after the pressure oil from a small cavity of the front steering oil cylinder 7 enters the front steering gear 5 through a fourth switch valve 64 of the switch valve group 6, so that a front wheel steering mode is realized. When the front steering gear 5 is reversed, the operation is reversed.
4. Rear wheel steering mode:
as shown in fig. 5, when the electromagnetic valve 3 is operated in the left position and the handle of the switch valve group 6 is upward, the on-off states of the five switch valves of the switch valve group 6 are sequentially the on-off switches, and the system is in the rear wheel steering mode. The steering working process is similar to the front wheel steering mode, pressure oil from the hydraulic pump 1 enters an oil inlet P of the rear steering gear 4 through the filter 2 and the electromagnetic valve 3, then enters a large cavity of the rear steering oil cylinder 8 through an oil port of the rear steering gear CL, the rear steering oil cylinder 8 is pushed to steer, the pressure oil from a small cavity of the rear steering oil cylinder 8 enters the rear steering gear 4 through a second switch valve 62 of the switch valve group 6, and then returns to the hydraulic oil tank 9 from an oil return port T of the rear steering gear 4, so that the front wheel steering mode is realized. When the rear steering gear 4 is reversed, the operation is reversed.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. Two kinds of mode hydraulic system that turn to are realized in two-way driving switch valves control, its characterized in that: the hydraulic steering system comprises a hydraulic oil tank, a hydraulic pump, an overflow valve, a filter, an electromagnetic valve, a switch valve group, a front steering gear, a rear steering gear, a front steering oil cylinder and a rear steering oil cylinder, wherein an inlet of the hydraulic pump is connected with the hydraulic oil tank, an outlet of the hydraulic pump is sequentially connected with the overflow valve and the filter, an outlet of the filter is connected with an inlet of the electromagnetic valve, two outlets of the electromagnetic valve are respectively connected with the front steering gear and the rear steering gear, an oil return port of the electromagnetic valve is connected with the hydraulic oil tank, two outlets of the front steering gear are respectively connected with the switch valve group and a large cavity of the front steering oil cylinder, two outlets of the rear steering gear are respectively connected with the switch valve group and a large cavity of the rear steering oil cylinder, a small cavity of the front steering oil cylinder and a small cavity of the rear steering oil cylinder are respectively connected with the switch valve group, and oil return ports of the front steering gear and the rear steering gear are respectively connected with the hydraulic oil tank;
the switch valve group comprises five switch valves which are arranged in sequence, one outlet of the front steering gear is connected with a left oil port of a fifth switch valve in the switch valve group, and the other outlet of the front steering gear is connected with a left oil port of a first switch valve in the switch valve group and a large cavity of the front steering oil cylinder; one outlet of the rear steering gear is connected with the right oil port of the first switch valve in the switch valve group, and the other outlet of the rear steering gear is connected with the right oil port of the fifth switch valve in the switch valve group and the large cavity of the rear steering oil cylinder; the small cavity of the front steering oil cylinder is connected with a right oil port of a third switch valve in the switch valve group, and the small cavity of the rear steering oil cylinder is connected with a left oil port of the third switch valve in the switch valve group;
five switch valves in the switch valve group are all manual operation valves;
the first, third and fifth switch valves are in the same switch state, and are opposite to the second and fourth switch valves in state, and the handles of the five switch valves are connected together.
2. The bi-directional steering switch valve bank control of claim 1 implements a two-steering mode hydraulic system, characterized in that: the left oil port of the second switch valve in the switch valve group is connected with the left oil port of the third switch valve, and the right oil port of the second switch valve is connected with the right oil port of the first switch valve; and a left oil port of the fourth switch valve is connected with a left oil port of the fifth switch valve, and a right oil port of the fourth switch valve is connected with a right oil port of the third switch valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910404799.3A CN110126913B (en) | 2019-05-16 | 2019-05-16 | Hydraulic system for realizing two steering modes by controlling two-way driving switch valve group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910404799.3A CN110126913B (en) | 2019-05-16 | 2019-05-16 | Hydraulic system for realizing two steering modes by controlling two-way driving switch valve group |
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| Publication Number | Publication Date |
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| CN110126913A CN110126913A (en) | 2019-08-16 |
| CN110126913B true CN110126913B (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910404799.3A Active CN110126913B (en) | 2019-05-16 | 2019-05-16 | Hydraulic system for realizing two steering modes by controlling two-way driving switch valve group |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6923290B1 (en) * | 2003-09-11 | 2005-08-02 | Sauer-Danfoss, Inc. | Closed circuit steering circuit for mobile vehicle |
| CN201872787U (en) * | 2010-09-14 | 2011-06-22 | 湖北万山宏业汽车零部件有限公司 | Vehicle two-way driving all hydraulic steering system |
| CN106240634A (en) * | 2016-08-15 | 2016-12-21 | 陕西铁路工程职业技术学院 | Radial type bidirectional steering vehicle all hydraulic pressure steering-gear |
| CN207790834U (en) * | 2018-01-12 | 2018-08-31 | 集瑞联合重工有限公司 | Special purpose vehicle and its two way all-wheel control system |
-
2019
- 2019-05-16 CN CN201910404799.3A patent/CN110126913B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6923290B1 (en) * | 2003-09-11 | 2005-08-02 | Sauer-Danfoss, Inc. | Closed circuit steering circuit for mobile vehicle |
| CN201872787U (en) * | 2010-09-14 | 2011-06-22 | 湖北万山宏业汽车零部件有限公司 | Vehicle two-way driving all hydraulic steering system |
| CN106240634A (en) * | 2016-08-15 | 2016-12-21 | 陕西铁路工程职业技术学院 | Radial type bidirectional steering vehicle all hydraulic pressure steering-gear |
| CN207790834U (en) * | 2018-01-12 | 2018-08-31 | 集瑞联合重工有限公司 | Special purpose vehicle and its two way all-wheel control system |
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| CN110126913A (en) | 2019-08-16 |
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