CN210343904U - Driven control valve group of thrust wheel and thrust wheel system - Google Patents
Driven control valve group of thrust wheel and thrust wheel system Download PDFInfo
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- CN210343904U CN210343904U CN201921232201.9U CN201921232201U CN210343904U CN 210343904 U CN210343904 U CN 210343904U CN 201921232201 U CN201921232201 U CN 201921232201U CN 210343904 U CN210343904 U CN 210343904U
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Abstract
The utility model discloses a passive control valve group of thrust wheels and a thrust wheel system, which comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a hydraulic control one-way valve and an energy accumulator; the first electromagnetic valve is arranged on a connecting branch of the large and small accommodating cavities of the thrust wheel oil cylinder; the second electromagnetic valve and the third electromagnetic valve are respectively and correspondingly arranged on a branch of the large containing cavity and a branch of the small containing cavity of the thrust wheel oil cylinder; a branch of the large cavity and a branch of the small cavity are respectively provided with a hydraulic control one-way valve; the branch of the large cavity is also provided with an energy accumulator. The valve group can realize the profile motion of the roller of the thrust wheel along with the change of the terrain; when the vehicle body is tilted, the pressure change caused by the volume change when the thrust wheel oil cylinder is forced to compress is utilized to play a role in supporting, so that the vehicle body is prevented from being tilted excessively. The control valve group not only meets the working condition requirements of the greening vehicle on simultaneous running and operation, but also can passively improve the stability of the whole vehicle, and is simple, reliable and safe.
Description
Technical Field
The utility model relates to a afforestation vehicle field especially relates to a thrust wheel valve unit for afforestation vehicle. Furthermore, the utility model discloses still relate to a thrust wheel control method including above-mentioned thrust wheel valve unit.
Background
The greening vehicle works normally and needs to be driven and trimmed at the same time. Under the working condition, when the arm support is unfolded for trimming or the road surface is uneven, the vehicle is inevitably inclined and unbalanced loaded, and the stability of the vehicle is influenced.
In order to solve the stability problem, a supporting wheel system with auxiliary rollers is added, so that the profiling motion of the rollers along with the change of terrain can be realized, the supporting and weight action can be realized when the vehicle body tilts, the vehicle body is prevented from tilting excessively, and the supporting wheel system is a solution which is convenient to obtain.
The supporting legs of the existing engineering machinery, such as cranes, pump trucks, fire trucks and the like, are generally installed and fixed for bearing after being extended out. The prior art can not be directly used for a greening vehicle.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art's defect, provide a check valve group and thrust wheel system of thrust wheel hydro-cylinder, can realize that the vehicle traveles simultaneously and the operating mode requirement of operation, adjust passively, improve vehicle stability.
For solving above-mentioned thrust wheel vehicle-mounted motion and the technical problem who plays the thrust, the utility model provides a following technical scheme:
a passive control valve group of a thrust wheel is characterized by comprising a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a hydraulic control one-way valve and an energy accumulator;
the first electromagnetic valve is arranged on a connecting branch of the large and small accommodating cavities of the thrust wheel oil cylinder;
the second electromagnetic valve and the third electromagnetic valve are respectively and correspondingly arranged on a branch of the large containing cavity and a branch of the small containing cavity of the thrust wheel oil cylinder;
a branch of the large cavity and a branch of the small cavity are respectively provided with a hydraulic control one-way valve;
the branch of the large cavity is also provided with an energy accumulator.
Furthermore, a branch of the large cavity and a branch of the small cavity are respectively provided with a throttling hole.
Furthermore, an overflow valve is arranged on a branch of the large cavity or a branch of the small cavity.
Further, when the first electromagnetic valve is powered off, the two large and small cavities are cut off into two independent cavities.
Furthermore, the two independent cavities are respectively controlled by a second electromagnetic valve and a third electromagnetic valve.
Furthermore, two hydraulic control one-way valves on the branch of the large containing cavity and the branch of the small containing cavity respectively seal the large containing cavity and the small containing cavity of the thrust wheel oil cylinder.
Further, when the first electromagnetic valve is electrified, the two cavities with the large and the small sizes are communicated to form one cavity.
Furthermore, the branch of the large cavity and the branch of the small cavity are provided with two hydraulic control one-way valves for closing the communicated cavities.
A thrust wheel system is characterized in that the system is controlled by a passive control valve set of any one of the thrust wheels.
The support is arranged on at least one side of the vehicle and comprises support legs, a thrust wheel oil cylinder and a thrust wheel; the supporting legs are driven by the thrust wheel oil cylinders to stretch; the supporting wheels are arranged at the bottoms of the supporting legs and can be in rolling contact with the ground.
The utility model discloses the beneficial effect who reaches:
the utility model relates to a thrust wheel valve unit that can be used to afforest the car. The valve group can realize the profile motion of the roller of the thrust wheel along with the change of the terrain; when the vehicle body is tilted, the pressure change caused by the volume change when the thrust wheel oil cylinder is forced to compress is utilized to play a role in supporting, so that the vehicle body is prevented from being tilted excessively.
The control valve group not only meets the working condition requirements of the greening vehicle on simultaneous running and operation, but also can passively improve the stability of the whole vehicle, and is simple, reliable and safe.
Drawings
FIG. 1 a track roller system;
FIG. 2 is a schematic diagram of a control valve assembly;
in the figure, 3.1-3.2-electromagnetic valves; 3.3-3.4-hydraulic control one-way valve; 3.5-3.6-orifice; 3.7-electromagnetic valve; 3.8-energy accumulator; 3.9-relief valve.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The utility model relates to a thrust wheel passive control valves and thrust wheel system.
As shown in figure 1, a supporting wheel system is correspondingly arranged on each of two sides of the greening vehicle. The thrust wheel system comprises a supporting leg 1, a thrust wheel oil cylinder 2 and a thrust wheel 3. The supporting legs 1 are telescopic and are driven by the supporting wheel oil cylinders 2 to stretch in the vertical direction. The supporting wheels 3 are arranged at the bottom of the supporting legs 1 and realize rolling type contact with the ground.
As shown in fig. 2, the thrust wheel control valve group comprises electromagnetic valves 3.1 and 3.2, pilot operated check valves 3.3 and 3.4, orifices 3.5 and 3.6, an electromagnetic valve 3.7, an accumulator 3.8 and an overflow valve 3.9.
The solenoid valves 3.1, 3.2 may be 2/3 solenoid valves. The solenoid valve 3.7 may be an 2/2 solenoid valve.
A solenoid valve 3.7 is arranged on a branch path connected with the large and small containing cavities of the thrust wheel oil cylinder 2 to realize the on-off of the floating function of the thrust wheel oil cylinder 2;
in a vehicle-receiving state, the electromagnetic valve 3.7 is powered off to separate the large and small containing cavities of the thrust wheel oil cylinder 2, so that the control of the two containing cavities of the thrust wheel oil cylinder 2 can be realized, and the expansion of the thrust wheel oil cylinder 2 can be realized;
in an operating state, the electromagnetic valve 3.7 is communicated with the large and small containing cavities of the thrust wheel oil cylinder 2 and is in differential connection with the large and small containing cavities of the thrust wheel oil cylinder 2, so that floating of a cylinder rod and a thrust function are realized.
An energy accumulator 3.8 is arranged on a branch of a large containing cavity of the thrust wheel oil cylinder 2, and the energy accumulator 3.8 converts the vehicle side tilting force to compress oil liquid of the thrust wheel oil cylinder 2 to form internal pressure; meanwhile, when the vehicle recovers the level, the supporting wheel oil cylinder 2 is released again to be reset. The energy storage function of the energy accumulator 3.8 is utilized, and the supporting function of the supporting wheel oil cylinder 2 is realized together with the floating function.
When the vehicle body does not roll or slightly rolls, the cylinder rod is allowed to float up and down to a certain degree due to the differential connection of the thrust wheel oil cylinder 2 and the capacitive action of the energy accumulator 3.8;
once the vehicle rolls, the unbalance loading causes a passive rise in the working pressure inside the accumulator 3.8, which immediately pushes the cylinder rod to lift and act against excessive rolling of the body.
The lifting and supporting tool has the specific principle that the side-tipping and unbalance-loading of the vehicle body causes the cylinder rod of the supporting wheel cylinder 2 to retract, and the volume change of the oil liquid in the large cavity and the small cavity caused by the area difference of the cylinders is not equal during retraction. Assuming a large volume change Δ V1, a small volume change Δ V2. It is obvious that Δ V1 is greater than Δ V2, so during the retraction of the cylinder rod, a part of the large-cavity oil Δ V1 is used for compensating the small-cavity oil change Δ V2, and the rest oil Δ V1- Δ V2 is used for causing the working pressure of the accumulator 3.8 to change, and it is the working pressure of the accumulator 3.8 which pushes the cylinder rod to cause the support reaction force of the vehicle.
The working pressure of the accumulator 3.8 varies, depending on the performance of the accumulator.
An overflow valve 3.9 is arranged on a branch of one of the containing cavities of the thrust wheel oil cylinder 2, so that the bearing capacity of the thrust wheel oil cylinder can be limited and hydraulic elements can be protected; preferably, the overflow valve 3.9 is arranged on a branch of the small cavity of the thrust wheel oil cylinder 2.
For the thrust wheel oil cylinder 2, when the oil cylinder is pressurized, the oil cylinder has a bending instability critical load, if the inclined load of the vehicle during rolling exceeds the critical load, the oil cylinder can be deformed and bent, so the maximum pressure is required to be limited;
for the accumulator, the accumulator itself has a maximum working pressure, which also needs to be protected.
Of course, the set pressure of the relief valve depends on the lesser of the two constraints.
And branch paths of the two cavities of the thrust wheel oil cylinder 2 are respectively provided with orifices 3.5 and 3.6 for controlling the extending and retracting speeds of the thrust wheel oil cylinder 2.
A hydraulic control one-way valve 3.3 and a hydraulic control one-way valve 3.4 are respectively and correspondingly arranged in front of the two throttling holes 3.5 and 3.6, so that the positioning of the lower supporting wheel oil cylinder 2 in a vehicle-folding state and the pressure maintaining function in an operating state are realized;
and the electromagnetic valves 3.1 and 3.2 are respectively arranged on the branches of the two cavities of the thrust wheel oil cylinder 2 and are used for controlling the thrust wheel oil cylinder to stretch and retract so as to realize the reversing of the thrust wheel oil cylinder.
When the vehicle is collected, the electromagnetic valve 3.7 is powered off, the floating function is cut off, and the large and small containing cavities of the oil cylinder are cut into two independent containing cavities. Because the electromagnetic valve 3.1 or 3.2 is electrified, the two independent cavities are controlled to drive the thrust wheel oil cylinder 2 to extend or contract. The two hydraulic control one-way valves 3.3 and 3.4 respectively seal the large and small containing cavities of the thrust wheel oil cylinder, so that the positioning of the oil cylinder can be realized, and the uncontrolled extension of a cylinder rod caused by bumping in the running process of a vehicle is prevented.
When the vehicle works, the electromagnetic valve 3.7 is electrified, the floating function is started, and the large and small cavities communicated with the thrust wheel oil cylinder 2 form a cavity. The electromagnetic valves 3.1 and 3.2 are powered off, and the liquid control one-way valves 3.3 and 3.4 are used for sealing the communicated containing cavities, so that the floating and supporting functions of the cylinder rod are guaranteed.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (10)
1. A passive control valve group of a thrust wheel is characterized by comprising a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a hydraulic control one-way valve and an energy accumulator;
the first electromagnetic valve is arranged on a connecting branch of the large and small accommodating cavities of the thrust wheel oil cylinder;
the second electromagnetic valve and the third electromagnetic valve are respectively and correspondingly arranged on a branch of the large containing cavity and a branch of the small containing cavity of the thrust wheel oil cylinder;
a branch of the large cavity and a branch of the small cavity are respectively provided with a hydraulic control one-way valve;
the branch of the large cavity is also provided with an energy accumulator.
2. The passive control valve group of thrust wheels according to claim 1, wherein a branch of the large cavity and a branch of the small cavity are respectively provided with a throttling hole.
3. The passive control valve group of the thrust wheel as claimed in claim 1, wherein an overflow valve is further arranged on a branch of the large cavity or a branch of the small cavity.
4. The passive valve group of the thrust wheel as claimed in claim 1, wherein when the first solenoid valve is de-energized, the two large and small cavities are cut off into two independent cavities.
5. A passive valve group of thrust wheels according to claim 4, characterized in that the two independent volumes are controlled by a second solenoid valve and a third solenoid valve respectively.
6. The passive control valve group of the thrust wheel as claimed in claim 4, wherein two hydraulic control check valves on the branch of the large cavity and the branch of the small cavity respectively close the large cavity and the small cavity of the thrust wheel cylinder.
7. The passive control valve group of the thrust wheel as claimed in claim 1, wherein when the first solenoid valve is electrified, the two cavities are communicated to form one cavity.
8. The passive valve group of thrust wheels according to claim 7, wherein two pilot operated check valves on the branch of the large chamber and the branch of the small chamber close the communicated chambers.
9. A track roller system controlled by a passive set of control valves for a track roller as claimed in any one of claims 1 to 8.
10. The track roller system of claim 9, disposed on at least one side of the vehicle, comprising a support leg, a track roller cylinder, and a track roller; the supporting legs are driven by the thrust wheel oil cylinders to stretch; the supporting wheels are arranged at the bottoms of the supporting legs and can be in rolling contact with the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921232201.9U CN210343904U (en) | 2019-08-01 | 2019-08-01 | Driven control valve group of thrust wheel and thrust wheel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921232201.9U CN210343904U (en) | 2019-08-01 | 2019-08-01 | Driven control valve group of thrust wheel and thrust wheel system |
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| Publication Number | Publication Date |
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| CN210343904U true CN210343904U (en) | 2020-04-17 |
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| CN201921232201.9U Active CN210343904U (en) | 2019-08-01 | 2019-08-01 | Driven control valve group of thrust wheel and thrust wheel system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285107A (en) * | 2019-08-01 | 2019-09-27 | 江苏集萃道路工程技术与装备研究所有限公司 | A kind of the passive type control valve group and thrust wheel system of thrust wheel |
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2019
- 2019-08-01 CN CN201921232201.9U patent/CN210343904U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285107A (en) * | 2019-08-01 | 2019-09-27 | 江苏集萃道路工程技术与装备研究所有限公司 | A kind of the passive type control valve group and thrust wheel system of thrust wheel |
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