CN215249221U - Hang valves, hang hydraulic system and all-terrain crane - Google Patents
Hang valves, hang hydraulic system and all-terrain crane Download PDFInfo
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- CN215249221U CN215249221U CN202120405897.1U CN202120405897U CN215249221U CN 215249221 U CN215249221 U CN 215249221U CN 202120405897 U CN202120405897 U CN 202120405897U CN 215249221 U CN215249221 U CN 215249221U
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Abstract
The utility model relates to a hoist chassis hangs technical field, for solving the problem that can't promote the wheel when the landing leg is propped up, the tire breaks away from ground in the suspension system of current all-terrain crane, the utility model discloses a hang valves, hang hydraulic system and all-terrain crane, wherein hang the valves and have oil inlet, oil return opening, big chamber connection hydraulic fluid port, little chamber connection hydraulic fluid port to including first valve, second valve, third valve, fourth valve; the first valve, the second valve, the third valve and the fourth valve are two-position two-way valves, the fourth valve is connected between the oil return port and the large cavity connecting oil port, and the second valve and the third valve are connected in series between the small cavity connecting oil port and the large cavity connecting oil port; one oil port of the first valve is connected with the oil inlet, and the other oil port of the first valve is connected with a communication oil way between the second valve and the third valve. The utility model discloses normally promote or descend the wheel when the landing leg of hoist is propped up, the tire breaks away from ground, adjust the height of the relative frame of wheel.
Description
Technical Field
The utility model relates to a hoist chassis hangs technical field, more specifically says, relates to a hang valves and hang hydraulic system.
Background
The crane chassis suspension system comprises a left suspension oil cylinder, a right suspension oil cylinder, a left suspension valve bank and a right suspension valve bank, and the suspension valve banks are used for controlling to realize elastic or rigid mode switching.
In the rigid mode, the rod cavity and the rodless cavity of the suspension oil cylinders on the left side and the right side in the suspension system are not communicated with each other, and the suspension oil cylinders are not communicated with the energy accumulator. Due to the incompressible property of hydraulic oil, the stroke of the suspension cylinder cannot be changed in the mode.
Under the elastic mode, the suspension valve group communicates the rodless cavity of the right suspension oil cylinder with the rod cavity of the left suspension oil cylinder and with the right energy accumulator, and communicates the rodless cavity of the left suspension oil cylinder with the rod cavity of the right suspension oil cylinder and with the left energy accumulator. The lifting of the whole vehicle can be realized in an elastic mode.
When the suspension lifting is carried out, external pressure oil enters the rodless cavities of the left suspension oil cylinder and the right suspension oil cylinder through the suspension valve group, and the oil in the rod cavities of the left suspension oil cylinder and the right suspension oil cylinder flows back to the hydraulic oil tank through the suspension valve group, so that the function of suspending and lifting the whole vehicle is realized. When the suspension descends, the rodless cavity oil of the suspension oil cylinder enters the rod cavity of the suspension oil cylinder through the suspension valve group, and redundant oil flows into the hydraulic oil tank through the suspension valve group, so that the function of the whole vehicle suspension descending is realized.
The original suspension valve system only realizes the suspension lifting function when the tire of the crane is contacted with the ground, when the lower landing leg of the crane is supported and the tire of the vehicle is separated from the ground, the suspension oil cylinder can not retract due to the fact that the gravity of the chassis can not act on the suspension oil cylinder, namely the lifting action of the tire can not be carried out.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is the problem that can't promote the wheel when landing leg is propped up, the tire breaks away from ground among the suspension of current all-terrain crane, and provide a hang valves, hang hydraulic system and all-terrain crane to normally promote or descend the wheel when landing leg is propped up, the tire breaks away from ground.
The utility model discloses a realize that the technical scheme of its purpose is like: constructing a suspension valve group, which is characterized by comprising an oil inlet, an oil return port, a large cavity connecting oil port and a small cavity connecting oil port, and further comprising a first valve, a second valve, a third valve and a fourth valve; the first valve, the second valve, the third valve and the fourth valve are two-position two-way valves, the fourth valve is connected between the oil return port and the large cavity connecting oil port, and the second valve and the third valve are connected in series between the small cavity connecting oil port and the large cavity connecting oil port; one oil port of the first valve is connected with the oil inlet, and the other oil port of the first valve is connected with a communication oil way between the second valve and the third valve.
The suspension valve group further comprises an overflow valve, and the overflow valve is connected with the fourth valve in parallel.
In the above suspension valve set, a throttle valve is arranged on the oil path between the fourth valve and the oil return port
In the above suspension valve set, the first valve, the second valve, the third valve and the fourth valve are all solenoid valves.
In the above suspension valve set, the first valve, the second valve and the fourth valve are in a cut-off state when the valve is powered off, and the third valve is in a conduction state when the valve is powered off.
In the suspension valve group, the suspension valve group is also provided with an energy accumulator interface communicated with the small cavity connecting oil port.
The utility model discloses a realize that the technical scheme of its purpose is like: the suspension hydraulic system is constructed and comprises a left suspension oil cylinder, a right suspension oil cylinder, a left suspension valve group, a right suspension valve group, a left energy accumulator and a right energy accumulator, and is characterized in that the left suspension valve group and the right suspension valve group are the suspension valve groups;
oil inlets of the left suspension valve bank and the right suspension valve bank are communicated with each other and connected with a pressure oil source, and oil return ports of the two valve banks are connected with a hydraulic oil tank;
a small cavity connecting oil port of the left suspension valve group and the left energy accumulator are both connected with a rod cavity of the right suspension oil cylinder; the large cavity connecting oil port is connected with the rodless cavity of the left suspension oil cylinder;
a small cavity connecting oil port of the right suspension valve group and the right energy accumulator are both connected with a rod cavity of the left suspension oil cylinder; the large cavity connecting oil port is connected with the rodless cavity of the right suspension oil cylinder.
The utility model discloses a realize that the technical scheme of its purpose is like: the all-terrain crane is characterized by also comprising the suspension hydraulic system, wherein two ends of a left suspension oil cylinder in the suspension hydraulic system are respectively hinged with the frame and the left swing arm mechanism; two ends of the right suspension oil cylinder are respectively hinged with the frame and the right swing arm mechanism.
Compared with the prior art, the utility model discloses normally promote or descend the wheel when the landing leg of hoist is propped up, the tire breaks away from ground, adjust the height of the relative frame of wheel.
Drawings
Fig. 1 is a schematic diagram of the structure of the suspension valve assembly of the present invention.
Fig. 2 is a schematic diagram of the suspension hydraulic system of the present invention.
Fig. 3 is a schematic view of a suspension system in an all-terrain crane.
Part names and serial numbers in the figure:
the hydraulic control system comprises a left suspension valve group 1, a first valve 11, a second valve 12, a third valve 13, a fourth valve 14, an overflow valve 15, a throttle valve 16, a left accumulator 2, a left suspension oil cylinder 3, a right suspension oil cylinder 4, a right suspension valve group 5, a right accumulator 6, a left wheel 7, a left swing arm mechanism 8, a right wheel 71, a right swing arm mechanism 81 and a frame.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
As shown in fig. 1, the suspension hydraulic system of the all-terrain crane in this embodiment includes a left suspension cylinder 3, a right suspension cylinder 4, a left suspension valve group 1, a right suspension valve group 5, a left accumulator 2, and a right accumulator 6, and the left suspension valve group 1 and the right suspension valve group 5 are suspension valve groups having the same structure.
As shown in fig. 2, the left suspension valve set has an oil inlet P, an oil return port T, a large chamber connection port B, a small chamber connection port a, and an accumulator interface a1, and includes a first valve 11, a second valve 12, a third valve 13, a fourth valve 14, and an overflow valve 15; the first valve 11, the second valve 12, the third valve 13 and the fourth valve 14 are all two-position two-way solenoid valves. The fourth valve 14 is connected between the oil return port T and the large cavity connecting oil port B, a throttle valve 16 is arranged on a connecting oil path between the fourth valve 14 and the oil return port T, and the second valve 12 and the third valve 13 are connected in series between the small cavity connecting oil port A and the large cavity connecting oil port B; one oil port of the first valve 11 is connected to the oil inlet P, and the other oil port is connected to a communication oil path between the second valve 12 and the third valve 13. The fourth valve 14 and the throttle valve 16 are connected in series and then connected in parallel with the relief valve, or the relief valve 15 and the fourth valve are connected in parallel. The accumulator port A1 is communicated with the small cavity connecting oil port A.
The first valve 11, the second valve 12, and the fourth valve 14 are turned off when they are de-energized, and the third valve 13 is turned on when they are de-energized.
As shown in figure 1, oil inlets P of a left suspension valve group 1 and a right suspension valve group 5 are communicated with each other and connected with a pressure oil source, and oil return ports T of the two valve groups are connected with a hydraulic oil tank.
The small cavity connecting oil port A of the left suspension valve group 1 is connected with the rod cavity of the right suspension oil cylinder 4, the large cavity connecting oil port B is connected with the rodless cavity of the left suspension oil cylinder 3, and the left energy accumulator 2 is connected with the energy accumulator interface A1 of the left suspension valve group 1.
The small cavity connecting oil port A of the right suspension valve group 5 is connected with the rod cavity of the left suspension oil cylinder 3, the large cavity connecting oil port B is connected with the rodless cavity of the right suspension oil cylinder 4, and the right energy accumulator 6 is connected with the energy accumulator interface A1 of the right suspension valve group 5.
As shown in fig. 3, in the all-terrain crane, the upper end of the left suspension cylinder 3 is hinged with a frame 9, the lower end of the left suspension cylinder is hinged with a left swing arm mechanism 8 connected with a left wheel 7, and the left wheel can be lifted relative to the frame by stretching and retracting the left suspension cylinder 3. The upper end of the right suspension oil cylinder 4 is hinged with the frame 9, the lower end of the right suspension oil cylinder is hinged with a right swing arm mechanism 81 connected with the right wheel 71, and the expansion of the right suspension oil cylinder 4 can realize the lifting of the right wheel relative to the frame.
The working principle of the suspension system in the all-terrain crane of the embodiment is as follows:
1. rigid mode: all electromagnetic valves in the left suspension valve group 1 and the right suspension valve group 5 are powered off, the first valve 11, the second valve 12 and the fourth valve 14 are all in a cut-off state, rod cavities and rodless cavities of the left suspension oil cylinder and the right suspension oil cylinder are mutually cut off, and due to the incompressible characteristic of hydraulic oil, the stroke of the suspension oil cylinder cannot be changed, so that the rigid connection between the frame and the vehicle is realized.
2. Elastic mode: in the left and right suspension valve groups 1 and 4, the second valve 12 is energized and turned on, the third valve 13 is de-energized and turned on, and the first valve 11 and the fourth valve 14 are de-energized and turned off. The rodless cavity of the left suspension cylinder 3 is communicated with the rod cavity of the right suspension cylinder 4 and the left accumulator 2 through a third valve 13 and a second valve 12 of the left suspension valve group 1. The rodless cavity of the right suspension cylinder 4 is communicated with the rod cavity of the left suspension cylinder 3 and the right accumulator 6 through a third valve 13 and a second valve 12 of the right suspension valve group 5, so that the elastic expansion of the left suspension cylinder and the right suspension cylinder is realized.
3. Lifting the wheels: all the electromagnetic valves in the left suspension valve group 1 and the right suspension valve group 5 are electrified, the first valve 11, the second valve 12 and the fourth valve 14 are conducted due to electrification, and the third valve 13 is cut off due to electrification. Oil in the rodless cavity of the left suspension oil cylinder 3 flows to the hydraulic oil tank through the fourth valve 14 in the left suspension valve group 1, and pressure oil of a pressure oil source enters the rod cavity of the left suspension oil cylinder 3 through the first valve 11 and the second valve 12 of the right suspension valve group 5, so that the retraction of the left suspension oil cylinder 3 is realized. In the same way, oil in the rodless cavity of the right suspension oil cylinder 4 flows to the hydraulic oil tank through the fourth valve 14 in the right suspension valve group 5, and pressure oil of a pressure oil source enters the rod cavity of the right suspension oil cylinder 4 through the first valve 11 and the second valve 12 of the left suspension valve group 1, so that the retraction of the right suspension oil cylinder 4 is realized. When the crane supporting legs are supported, the wheels are lifted by retracting the suspension oil cylinders and are separated from the ground; when the supporting legs are not supported, the vehicle always lands on the ground, and the frame descends relative to the ground when the suspension oil cylinder retracts, namely the height of the chassis descends.
4. And (3) descending of wheels: the first valve 11 and the second valve 12 of the left suspension valve group 1 and the right suspension valve group 5 are energized and placed in an on state, the third valve 13 is de-energized and placed in an on state, and the fourth valve 14 is de-energized and placed in an off state. A pressure oil source supplies oil, a rodless cavity of the left suspension oil cylinder 3 is communicated with an oil inlet P through a third valve 13 and a first valve 11 in the left suspension valve group 1, and a rod cavity is communicated with the oil inlet P through a second valve 12 and the first valve 11 in the right suspension valve group 5; a rodless cavity of the right suspension oil cylinder 4 is communicated with an oil inlet P through a third valve 13 and a first valve 11 in the right suspension valve group 5, and a rod cavity is communicated with the oil inlet P through a second valve 12 and the first valve 11 in the left suspension valve group 1; thereby realize about hanging rodless chamber and the chamber that has the pole in the hydro-cylinder intercommunication and all communicate with the oil inlet each other to realize the extension of left and right sides hanging hydro-cylinder. When the crane supporting legs are supported, the suspension oil cylinders extend to enable the wheels to descend, and the distance between the wheels and the ground is reduced until the wheels are in contact with the ground; when the supporting legs are not supported, the vehicle is always grounded, and the extension of the suspension oil cylinder is that the frame is raised relative to the ground, namely the height of the chassis is raised.
Claims (9)
1. A suspension valve group is characterized by comprising an oil inlet, an oil return port, a large cavity connecting oil port and a small cavity connecting oil port, and further comprising a first valve, a second valve, a third valve and a fourth valve; the first valve, the second valve, the third valve and the fourth valve are two-position two-way valves, the fourth valve is connected between the oil return port and the large cavity connecting oil port, and the second valve and the third valve are connected in series between the small cavity connecting oil port and the large cavity connecting oil port; one oil port of the first valve is connected with the oil inlet, and the other oil port of the first valve is connected with a communication oil way between the second valve and the third valve.
2. The hanging valve group of claim 1, further comprising an overflow valve connected in parallel with the fourth valve.
3. A valve group according to claim 1, characterised in that a throttle valve is arranged in the oil path between the fourth valve and the return.
4. The set of suspension valves according to any of claims 1 to 3, characterized in that said first, second, third and fourth valves are all solenoid valves.
5. The valve manifold as set forth in claim 4, wherein said first, second and fourth valves are de-energized in a closed state and said third valve is de-energized in an open state.
6. The valve group according to claim 5, characterized in that it is further provided with an accumulator interface communicating with said small chamber connection port.
7. A suspension hydraulic system comprising a left suspension cylinder, a right suspension cylinder, a left suspension valve group, a right suspension valve group, a left accumulator and a right accumulator, characterized in that the left suspension valve group and the right suspension valve group are the suspension valve groups according to any one of claims 1 to 5;
oil inlets of the left suspension valve bank and the right suspension valve bank are communicated with each other and connected with a pressure oil source, and oil return ports of the two valve banks are connected with a hydraulic oil tank;
a small cavity connecting oil port of the left suspension valve group and the left energy accumulator are both connected with a rod cavity of the right suspension oil cylinder; the large cavity connecting oil port is connected with the rodless cavity of the left suspension oil cylinder;
a small cavity connecting oil port of the right suspension valve group and the right energy accumulator are both connected with a rod cavity of the left suspension oil cylinder; the large cavity connecting oil port is connected with the rodless cavity of the right suspension oil cylinder.
8. Suspension hydraulic system according to claim 7, characterized in that the suspension valve group is further provided with an accumulator interface for connection with an accumulator and communication with the small chamber connection port.
9. A kind of all-terrain crane, its left side wheel is connected with left side swing arm mechanism, the right side wheel is connected with right side swing arm mechanism, characterized by that to also have suspension hydraulic system in claim 7 or 8, hang both ends of left suspension cylinder in the hydraulic system and articularly connect with frame and left side swing arm mechanism separately; two ends of the right suspension oil cylinder are respectively hinged with the frame and the right swing arm mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120405897.1U CN215249221U (en) | 2021-02-24 | 2021-02-24 | Hang valves, hang hydraulic system and all-terrain crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120405897.1U CN215249221U (en) | 2021-02-24 | 2021-02-24 | Hang valves, hang hydraulic system and all-terrain crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215249221U true CN215249221U (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120405897.1U Active CN215249221U (en) | 2021-02-24 | 2021-02-24 | Hang valves, hang hydraulic system and all-terrain crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215249221U (en) |
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2021
- 2021-02-24 CN CN202120405897.1U patent/CN215249221U/en active Active
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