CN220032047U - All-terrain vehicle hydraulic steering system - Google Patents
All-terrain vehicle hydraulic steering system Download PDFInfo
- Publication number
- CN220032047U CN220032047U CN202320788338.2U CN202320788338U CN220032047U CN 220032047 U CN220032047 U CN 220032047U CN 202320788338 U CN202320788338 U CN 202320788338U CN 220032047 U CN220032047 U CN 220032047U
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 28
- 239000003921 oil Substances 0.000 claims description 52
- 239000010720 hydraulic oil Substances 0.000 claims description 18
- 230000001502 supplementing effect Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Steering Control In Accordance With Driving Conditions (AREA)
Abstract
The utility model discloses a hydraulic steering system of an all-terrain vehicle, which comprises a steering gear (6) and a steering oil cylinder (3), wherein an outlet of a variable pump (1) is connected with a steering oil way switching valve (7) through a one-way valve (4), the steering oil way switching valve (7) is connected with the steering gear (6) and the steering oil cylinder (3), the steering gear (6) adjusts the displacement through a steering gear variable control cylinder (9), and the steering gear variable control cylinder (9) is controlled by an electric proportion two-position three-way reversing valve (11). The utility model provides a hydraulic steering gear capable of adjusting the displacement according to the requirement, aiming at the problem that the displacement of the existing hydraulic steering gear cannot be adjusted according to the vehicle speed.
Description
Technical Field
The utility model relates to a hydraulic steering control system of an all-terrain vehicle.
Background
At present, a hydraulic steering device is almost used for accurately controlling the steering angle of a vehicle which uses hydraulic driving steering, the hydraulic steering device is mainly based on fixed displacement, namely, the steering angle of a steering wheel and the steering angle of the whole vehicle are in a completely proportional (constant ratio) relation, the control mode has the advantage of high steering accuracy, but the control mode has the defect that the steering angle is completely matched with the steering angle of the steering wheel and is fixed no matter how fast or slow the running speed of the vehicle is, the control is humanized when the running speed of the vehicle is low, but dangerous consequences such as rollover, tail flicking and the like can be generated when the running speed of the vehicle is high by rapidly stirring the steering wheel.
At present, in the field of passenger automobiles, auxiliary steering is performed through a plurality of intelligent new technical means, so that high stability and safety of steering control at low speed or high speed are ensured, and in the field of engineering vehicles using hydraulic steering control, the steering control is ensured by means of manual operation proficiency.
The all-terrain vehicles which are biased to emergency rescue, border protection patrol and plateau material transportation in China at present are increasingly widely used due to good running performance and excellent all-terrain traffic capacity, and the vehicles mainly adopt hydraulic driving steering, so that the defects are obvious.
Disclosure of Invention
The utility model aims to solve the technical problems that: aiming at the problem that the displacement of the existing hydraulic steering gear cannot be adjusted according to the vehicle speed, the hydraulic steering gear capable of adjusting the displacement is provided, and the displacement of the hydraulic steering gear is adjusted according to the requirement.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a hydraulic steering device comprises a steering gear 6, wherein the steering gear 6 adjusts the displacement through a steering gear variable control cylinder 9, the steering gear variable control cylinder 9 is controlled by an electric proportion two-position three-way reversing valve 11, and the opening of an oil way in the electric proportion two-position three-way reversing valve 11 is controlled by an electric signal after the speed of a vehicle is converted.
The hydraulic steering system of the all-terrain vehicle comprises the hydraulic steering device, wherein an outlet of the variable pump 1 is connected with a steering oil way switching valve 7 through a one-way valve 4, and the steering oil way switching valve 7 is connected with a steering device 6 and a steering oil cylinder 3.
The outlet of the one-way valve 4 is provided with a shunt access customized pressure reducing valve 10, and the customized pressure reducing valve 10 is connected with an electric proportion two-position three-way reversing valve 11.
Two steering cylinders 3 are arranged on a hinging device between the front body and the rear body of the all-terrain vehicle, and when one steering cylinder 3 contracts, the other steering cylinder 3 extends.
The outlet oil way bypass of the variable pump 1 is provided with a safety relief valve 2.
The bypass of the hydraulic oil path flowing into and out of the steering cylinder 3 is simultaneously communicated with the buffer/anti-suction valve combination 8.
The outlet of the check valve 4 is provided with a branch which is connected with an oil return way through an oil supplementing check valve 5, and the oil supplementing check valve 5 and the check valve 4 are reversely arranged.
The outlet oil passage of the variable pump 1 is provided with a pressure detection port M.
The cylinder bodies of the two steering cylinders 3 are hinged on the hinging device, and the front ends of the two steering cylinders 3 are hinged with the front vehicle body.
The utility model has the beneficial effects that:
the displacement of the hydraulic steering gear can be adjusted according to the requirement, and meanwhile, the hydraulic steering device can be used for controlling vehicles, equipment and the like by other hydraulic steering.
The hydraulic steering gear displacement may be adjusted by a control signal inversely proportional to the vehicle speed, the steering gear displacement decreasing as the vehicle speed increases; conversely, when the vehicle speed decreases, the displacement of the steering gear increases. By means of the method, at a higher vehicle speed, the same steering wheel turns, the quantity of hydraulic oil obtained by the steering oil cylinder is smaller, the stroke of the steering oil cylinder is correspondingly shortened, and therefore the steering angle of the whole vehicle is also reduced; at a lower vehicle speed, the same steering wheel turns, the amount of hydraulic oil obtained by the steering oil cylinder is more, and the travel of the steering oil cylinder is correspondingly longer, so that the steering angle of the whole vehicle is also larger.
Drawings
Fig. 1 is a schematic diagram of a hydraulic steering system.
Fig. 2 is a steering cylinder layout.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Example 1:
the hydraulic steering device comprises a steering gear 6, wherein the steering gear 6 adjusts the displacement through a steering gear variable control cylinder 9, the displacement of the steering gear 6 can be adjusted through the stroke change of the steering gear variable control cylinder 9, the steering gear variable control cylinder 9 is controlled by an electric proportional two-position three-way reversing valve 11, and the opening amount of an oil way in the electric proportional two-position three-way reversing valve 11 is controlled by an electric signal after the speed conversion. Under the control of an electric signal after the speed conversion, the electric-proportion two-position three-way reversing valve 11 regulates the opening amount of an oil way in the electric-proportion two-position three-way reversing valve 11, high-pressure hydraulic oil flows into the variable control cylinder 9 of the steering gear through the electric-proportion two-position three-way reversing valve 11 to regulate the displacement of the steering gear (the displacement regulation of the steering gear is carried out completely according to the speed of the vehicle at this step), and when the speed of the vehicle is increased, the displacement of the steering gear 6 is reduced; when the vehicle speed decreases, the displacement of the steering gear 6 increases.
Example 2:
as shown in fig. 1, the hydraulic steering system of the all-terrain vehicle in this embodiment comprises a variable pump 1, a safety overflow valve 2, a steering cylinder 3 (two pieces), a one-way valve 4, an oil supplementing one-way valve 5, a steering device 6, a steering oil way switching valve 7, a buffering/anti-sucking valve combination 8, a steering device variable control cylinder 9, a constant pressure reducing valve 10, an electric proportion two-position three-way switching valve 11, a hydraulic oil tank 12, a hydraulic oil way and the like.
Basic circuit when driving the vehicle to steer: the variable pump 1 sucks hydraulic oil from the hydraulic oil tank 12, high-pressure hydraulic oil at the outlet of the variable pump 1 opens the one-way valve 4 and flows into the steering oil path switching valve 7, the steering oil path switching valve 7 is driven to change direction according to the steering direction of the steering wheel, the hydraulic oil flowing into the steering oil path switching valve 7 flows into the steering device 6, the hydraulic oil passes through the steering device 6 and is directly supplied to one cavity of the steering oil cylinder 3, and the hydraulic oil in the other cavity of the steering oil cylinder 3 flows through the steering oil path switching valve 7 to return oil;
the outlet oil way bypass of the variable pump 1 is provided with a safety overflow valve 2, so that the safety of the hydraulic steering system is ensured, and in addition, the outlet oil way of the variable pump 1 is provided with a pressure detection port M;
the hydraulic oil way bypass flowing into and out of the steering oil cylinder 3 is communicated with the buffer/anti-suction valve combination 8 at the same time, so that the use safety of the steering oil cylinder is ensured, the suction phenomenon of the oil cylinder in the operation process is prevented, and the quick oil supplementing can be performed.
The displacement of the steering gear 6 is variable, the displacement adjustment is driven by a steering gear variable control cylinder 9, and the displacement of the steering gear 6 can be adjusted by changing the stroke of the steering gear variable control cylinder 9;
the other path of high-pressure oil at the outlet of the one-way valve 4 flows into the customized pressure reducing valve 10 and then reaches the electric-proportion two-position three-way reversing valve 11, the opening of an oil way in the electric-proportion two-position three-way reversing valve 11 is regulated by the electric-signal control of the electric-proportion two-position three-way reversing valve 11 after the speed conversion, and the high-pressure hydraulic oil flows into the variable control cylinder 9 of the steering gear through the electric-proportion two-position three-way reversing valve 11 to regulate the displacement of the steering gear (the displacement of the steering gear is regulated according to the speed of the vehicle in this step). The oil return port of the electric proportion two-position three-way reversing valve 11 is directly connected with an oil return way.
The return oil way is directly communicated with the hydraulic oil tank 12, the bypass is provided with the oil supplementing one-way valve 5, and the oil supplementing one-way valve 5 can rapidly supplement oil to the steering gear to prevent the steering gear 6 from sucking air.
When the vehicle speed increases, the displacement of the steering gear 6 decreases; conversely, when the vehicle speed decreases, the displacement of the steering gear increases. By means of the means, at a higher vehicle speed, the same steering wheel turns, the amount of hydraulic oil obtained by the steering oil cylinder 3 is smaller, the stroke of the steering oil cylinder is correspondingly shortened, and the steering angle of the whole vehicle is reduced; at a lower vehicle speed, the same steering wheel angle is adopted, the amount of hydraulic oil obtained by the steering oil cylinder 3 is more, the travel of the steering oil cylinder is correspondingly longer, and the steering angle of the whole vehicle is also larger.
Claims (9)
1. The utility model provides an all-terrain vehicle hydraulic steering system, includes steering gear (6) and steering cylinder (3), its characterized in that: the outlet of the variable pump (1) is connected with a steering oil way switching valve (7) through a one-way valve (4), the steering oil way switching valve (7) is connected with a steering device (6) and a steering oil cylinder (3), the steering device (6) adjusts the displacement through a steering device variable control cylinder (9), and the steering device variable control cylinder (9) is controlled by an electric proportion two-position three-way reversing valve (11).
2. The all-terrain vehicle hydraulic steering system of claim 1, wherein: the outlet of the one-way valve (4) is provided with a shunt access customized pressure reducing valve (10), and the customized pressure reducing valve (10) is connected with an electric proportion two-position three-way reversing valve (11).
3. The all-terrain vehicle hydraulic steering system of claim 2, wherein: two steering cylinders (3) are arranged on a hinging device between the front body and the rear body of the all-terrain vehicle, and when one steering cylinder (3) contracts, the other steering cylinder (3) stretches.
4. The all-terrain vehicle hydraulic steering system of claim 3, wherein: the outlet oil way bypass of the variable pump (1) is provided with a safety overflow valve (2).
5. The all-terrain vehicle hydraulic steering system of claim 4, wherein: the bypass of the hydraulic oil path flowing into and out of the steering oil cylinder (3) is simultaneously communicated with the buffer/anti-suction valve combination (8).
6. The all-terrain vehicle hydraulic steering system of claim 5, wherein: the outlet of the one-way valve (4) is provided with a branch which is connected with an oil return way through an oil supplementing one-way valve (5), and the oil supplementing one-way valve (5) and the one-way valve (4) are reversely arranged.
7. The all-terrain vehicle hydraulic steering system of claim 5, wherein: the outlet oil way of the variable pump (1) is provided with a pressure detection port M.
8. The all-terrain vehicle hydraulic steering system of claim 5, wherein: the cylinder bodies of the two steering cylinders (3) are hinged on the hinging device, and the front ends of the two steering cylinders (3) are hinged with the front vehicle body.
9. The all-terrain vehicle hydraulic steering system of any of claims 1-8, wherein: the opening of the oil way in the valve of the electric proportion two-position three-way reversing valve (11) is controlled by an electric signal after the speed conversion, so that the displacement of the steering gear (6) is reduced when the speed of the vehicle is increased, and the displacement of the steering gear (6) is increased when the speed of the vehicle is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320788338.2U CN220032047U (en) | 2023-04-11 | 2023-04-11 | All-terrain vehicle hydraulic steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320788338.2U CN220032047U (en) | 2023-04-11 | 2023-04-11 | All-terrain vehicle hydraulic steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220032047U true CN220032047U (en) | 2023-11-17 |
Family
ID=88724958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320788338.2U Active CN220032047U (en) | 2023-04-11 | 2023-04-11 | All-terrain vehicle hydraulic steering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220032047U (en) |
-
2023
- 2023-04-11 CN CN202320788338.2U patent/CN220032047U/en active Active
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