CN215439563U - Hydraulic system of overhead working truck and scissor-fork type overhead working truck - Google Patents
Hydraulic system of overhead working truck and scissor-fork type overhead working truck Download PDFInfo
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- CN215439563U CN215439563U CN202122180474.7U CN202122180474U CN215439563U CN 215439563 U CN215439563 U CN 215439563U CN 202122180474 U CN202122180474 U CN 202122180474U CN 215439563 U CN215439563 U CN 215439563U
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- 239000003921 oil Substances 0.000 claims abstract description 141
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 abstract description 19
- 238000013016 damping Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Abstract
The utility model discloses a hydraulic system of an aerial lift truck and a scissor-fork type aerial lift truck, wherein the hydraulic system of the aerial lift truck comprises: the oil tank is used for providing hydraulic oil; the oil cylinder provides power for the lifting device; the oil supply oil way is connected with the oil tank and the oil cylinder and is provided with a hydraulic pump, a one-way valve and a first damper; and the oil return oil way is connected with the oil tank and the oil cylinder and is used for enabling the hydraulic oil in the rod cavity of the oil cylinder to flow back to the oil tank. In the process of using the hydraulic system of the high-altitude operation vehicle provided by the utility model, when the check valve is blocked after the hydraulic system is lifted to a certain height, the hydraulic oil in the rodless cavity of the oil cylinder flows back to the oil tank through the check valve, and flows through the first damper in the process of backflow, so that the flow rate of the hydraulic oil is limited by the first damper, the retraction speed of the oil cylinder is limited, the high-altitude operation vehicle is controlled to slowly descend, the damage to equipment and the casualties of personnel in the process of rapid descending are avoided, and the safety of the high-altitude operation vehicle is improved.
Description
Technical Field
The utility model relates to the technical field of high-altitude operation equipment, in particular to a hydraulic system of a high-altitude operation vehicle. In addition, the utility model also relates to a scissor type aerial work vehicle comprising the hydraulic system of the aerial work vehicle.
Background
At present, in a lifting oil circuit of a hydraulic system of a scissor type aerial work vehicle, a check valve or a one-way throttle valve is mostly used for preventing oil from flowing backwards, and in the using process, once the check valve is clamped and blocked, the oil flows out in the direction opposite to the flow direction of the original check valve through the check valve, so that the scissor type aerial work vehicle lifted to a high place originally descends quickly, and the conditions of equipment damage, casualties of operating personnel and the like are caused.
In summary, how to improve the safety of the overhead working truck is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a hydraulic system for an aerial work platform, which can control the aerial work platform to slowly descend when a check valve in the hydraulic system is stuck and lagged during use, so as to avoid damage to equipment and casualties of personnel during the rapid descent, and improve the safety of the aerial work platform.
Another object of the utility model is to provide a scissor-type aerial lift truck comprising the hydraulic system of the aerial lift truck.
In order to achieve the above purpose, the utility model provides the following technical scheme:
an aerial lift truck hydraulic system comprising:
the oil tank is used for providing hydraulic oil;
the oil cylinder provides power for the lifting device;
the oil supply oil path is connected with the oil tank and the oil cylinder, is provided with a hydraulic pump, a one-way valve and a first damper, and the hydraulic oil flows through the hydraulic pump and the one-way valve from the oil tank in sequence and enters a rodless cavity of the oil cylinder; in the clamping state of the one-way valve, hydraulic oil in a rodless cavity of the oil cylinder sequentially flows through the one-way valve and the first damper and enters the oil tank;
and the oil return oil way is connected with the oil tank and the oil cylinder and used for enabling the hydraulic oil in the rod cavity of the oil cylinder to flow back to the oil tank.
Preferably, a reversing valve is arranged between the one-way valve and the first damper.
Preferably, a filter is arranged at one end of the oil return path connected with the oil tank.
Preferably, a first overflow valve is arranged between the hydraulic pump and the reversing valve, and an outlet of the first overflow valve is connected with an inlet of the filter.
Preferably, a second overflow valve is arranged between the reversing valve and the one-way valve, and an outlet of the second overflow valve is connected with an inlet of the filter.
Preferably, the hydraulic system of the overhead working truck comprises a rodless cavity connected with the oil cylinder and an oil drainage way of the oil tank, wherein the oil drainage way is provided with a control valve and a second damper, so that hydraulic oil in the rodless cavity of the oil cylinder is discharged to the oil tank through the control valve and the second damper in sequence.
Preferably, the hydraulic system of the high-altitude operation vehicle comprises any one of the hydraulic systems.
In the process of using the hydraulic system of the overhead working truck, when the overhead working truck is lifted, the hydraulic pump in the oil supply oil way works to ensure that hydraulic oil in the oil tank enters a rodless cavity of the oil cylinder through the hydraulic pump and the one-way valve to push the oil cylinder to extend out and drive the lifting device to lift; meanwhile, hydraulic oil in a rod cavity of the oil cylinder can flow back to the oil tank through an oil return oil way; when the check valve is blocked after the hydraulic cylinder is lifted to a certain height, hydraulic oil in a rodless cavity of the hydraulic cylinder flows back to the oil tank through the check valve, flows through the first damping in the backflow process, and the first damping limits the flow rate of the hydraulic oil, so that the retraction speed of the hydraulic cylinder is limited, the high-altitude operation vehicle is controlled to slowly descend, damage to equipment and casualties of personnel in the rapid descending process are avoided, and the safety of the high-altitude operation vehicle is improved.
In addition, the utility model also provides a scissor type aerial work vehicle comprising the hydraulic system of the aerial work vehicle.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a hydraulic system of an aerial work platform provided by the utility model.
In fig. 1:
1 is an oil tank, 2 is a hydraulic pump, 3 is a filter, 4 is a first overflow valve, 5 is a first damper, 6 is a reversing valve, 7 is a second overflow valve, 8 is a second damper, 9 is a check valve, 10 is a control valve, and 11 is an oil cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The core of the utility model is to provide a hydraulic system of an overhead working truck, which can control the overhead working truck to slowly descend when a check valve in the hydraulic system is clamped and lagged in the use process, thereby avoiding the damage to equipment and the casualties of personnel in the rapid descending process and improving the safety of the overhead working truck. The other core of the utility model is to provide a scissor type aerial work vehicle comprising the hydraulic system of the aerial work vehicle.
Please refer to fig. 1.
This embodiment provides an aerial working car hydraulic system, includes:
the oil tank 1 is used for providing hydraulic oil;
the oil cylinder 11 is used for providing power for the lifting device;
the hydraulic oil pump comprises an oil supply oil path, a hydraulic pump 2, a one-way valve 9 and a first damper 5, wherein the oil supply oil path is connected with an oil tank 1 and an oil cylinder 11, and hydraulic oil flows through the hydraulic pump 2 and the one-way valve 9 from the oil tank 1 in sequence and enters a rodless cavity of the oil cylinder 11; in the clamping state of the one-way valve 9, hydraulic oil in a rodless cavity of the oil cylinder 11 sequentially flows through the one-way valve 9 and the first damper 5 and enters the oil tank 1;
and the oil return circuit is connected with the oil tank 1 and the oil cylinder 11 and is used for enabling the hydraulic oil in the rod cavity of the oil cylinder 11 to flow back to the oil tank 1.
In the process of using the hydraulic system of the overhead working truck provided by the embodiment, when the overhead working truck is lifted, the hydraulic pump 2 in the oil supply circuit works to enable hydraulic oil in the oil tank 1 to enter the rodless cavity of the oil cylinder 11 through the hydraulic pump 2 and the one-way valve 9, so that the oil cylinder 11 is pushed to extend out, and the lifting device is driven to lift; meanwhile, the hydraulic oil in the rod cavity of the oil cylinder 11 can flow back to the oil tank 1 through an oil return circuit; when the check valve 9 is blocked after the hydraulic cylinder 11 is lifted to a certain height, hydraulic oil in a rodless cavity of the hydraulic cylinder 11 flows back to the oil tank 1 through the check valve 9 and flows through the first damper 5 in the backflow process, and the first damper 5 limits the flow rate of the hydraulic oil, so that the retraction speed of the hydraulic cylinder 11 is limited, the high-altitude operation vehicle is controlled to slowly descend, damage to equipment and casualties of personnel in the rapid descending process are avoided, and the safety of the high-altitude operation vehicle is improved.
Referring to fig. 1, a reversing valve 6 is arranged between the check valve 9 and the first damper 5, during use, when the lifting device is lifted, the hydraulic pump 2 works, the reversing valve 6 is in the right position, and hydraulic oil in the oil tank 1 sequentially flows through the hydraulic pump 2, the right position of the reversing valve 6 and the check valve 9 to enter a rodless cavity of the oil cylinder 11.
Preferably, one end that the oil return oil circuit is connected with oil tank 1 is provided with filter 3, and at the in-process of hydraulic oil backward flow, can filter hydraulic oil, avoid the hydraulic oil with impurity to get into oil tank 1, be favorable to prolonging the life of spare part in the high altitude construction car hydraulic system.
A first overflow valve 4 can be arranged between the hydraulic pump 2 and the reversing valve 6, the outlet of the first overflow valve 4 is connected with the inlet of the filter 3, and when the oil supply flow is overlarge in the oil supply process of the rodless cavity of the oil cylinder 11, the hydraulic oil can flow back to the oil tank 1 through the first overflow valve 4.
A second overflow valve 7 can be arranged between the reversing valve 6 and the one-way valve 9, the outlet of the second overflow valve 7 is connected with the inlet of the filter 3, and when the oil supply flow is overlarge in the oil supply process of the rodless cavity of the oil cylinder 11, the hydraulic oil can flow back to the oil tank 1 through the second overflow valve 7.
In another specific embodiment, as shown in fig. 1, the oil supply path includes a hydraulic pump 2, a reversing valve 6, a check valve 9, a first damper 5, a first overflow valve 4 and a second overflow valve 7, the oil return path includes a filter 3, the hydraulic system of the aerial work platform includes an oil discharge path connecting a rodless cavity of an oil cylinder 11 and an oil tank 1, and the oil discharge path is provided with a control valve 10 and a second damper 8, so as to discharge hydraulic oil in the rodless cavity of the oil cylinder 11 to the oil tank 1 through the control valve 10 and the second damper 8 in sequence; wherein the reversing valve 6 is in the right position under the oil supply state, and is in the left position after the oil supply is finished.
In the using process, when the lifting action is executed, the hydraulic pump 2 works, hydraulic oil sequentially flows through the hydraulic pump 2, the reversing valve 6 and the one-way valve 9 to enter a rodless cavity of the oil cylinder 11 and push a piston rod of the oil cylinder 11 to extend out, and in the process, the hydraulic oil in a rod cavity of the oil cylinder 11 flows back through an oil return oil way and flows back to the oil tank 1 through the filter 3 until the high-altitude operation vehicle finishes the lifting action; after the lifting action is finished, the hydraulic pump 2 stops working, no hydraulic oil is supplied, the reversing valve 6 reverses, the hydraulic oil between the one-way valve 9 and the reversing valve 6 flows back through the first damper 5 and flows back to the oil tank 1 until the hydraulic oil between the one-way valve 9 and the reversing valve 6 flows back to the oil tank 1; at the moment, the control valve 10 is in the state of the one-way valve 9 at the left position, the control valve 10 and the one-way valve 9 act together, so that hydraulic oil in the rodless cavity of the oil cylinder 11 is locked in the rodless cavity of the oil cylinder 11, the high-altitude operation vehicle is kept in the lifting state, and the lifting height is unchanged.
When the lifting device of the overhead working truck needs to be controlled to descend, the control valve 10 is reversed to the right position, hydraulic oil in a rodless cavity of the oil cylinder 11 flows back to the oil tank 1 through the control valve 10, the second damper 8 and the filter 3, and in the process of flowing back, due to the existence of the second damper 8, the lifting device of the overhead working truck can descend slowly, so that danger is avoided.
When the lifting device of the overhead working truck is lifted to a certain height or kept at the maximum height, if the one-way valve 9 is clamped, fails and the like under certain abnormal factors, hydraulic oil in a rodless cavity of the oil cylinder 11 flows through the one-way valve 9, the first damper 5 and the filter 3 in sequence and flows back to the oil tank 1; due to the existence of the first damper 5, the flow speed of hydraulic oil can be limited, the lifting device of the high-altitude operation vehicle can slowly descend from a certain height or the highest height, and the descending speed of the lifting device is slower than or equal to the descending speed of the control valve 10 in the right position under the normal condition, so that the safety is improved.
In addition to the hydraulic system of the aerial work platform, the utility model further provides a scissor-type aerial work platform comprising the hydraulic system of the aerial work platform disclosed in the above embodiments, and the structure of other parts of the scissor-type aerial work platform is referred to the prior art and is not described herein again.
Of course, the hydraulic system of the aerial work platform provided by the application can also be applied to other aerial work equipment, and is not described herein.
It should be noted that, in the present application, the first damper 5 and the second damper 8, and the "first" and "second" in the first relief valve 4 and the second relief valve 7 are only mentioned for distinguishing the difference of the positions, and are not sequentially mentioned.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. Any combination of all the embodiments provided by the present invention is within the scope of the present invention, and will not be described herein.
The hydraulic system of the overhead working truck and the scissor-type overhead working truck provided by the utility model are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A hydraulic system of an aerial lift truck, comprising:
the oil tank (1) is used for providing hydraulic oil;
the oil cylinder (11) is used for providing power for the lifting device;
the oil supply oil path is connected with the oil tank (1) and the oil cylinder (11), and is provided with a hydraulic pump (2), a one-way valve (9) and a first damper (5), and the hydraulic oil flows through the hydraulic pump (2) and the one-way valve (9) from the oil tank (1) in sequence and enters a rodless cavity of the oil cylinder (11); under the clamping state of the one-way valve (9), hydraulic oil in a rodless cavity of the oil cylinder (11) sequentially flows through the one-way valve (9) and the first damper (5) and enters the oil tank (1);
and the oil return oil way is connected with the oil tank (1) and the oil cylinder (11) and used for enabling hydraulic oil in a rod cavity of the oil cylinder (11) to flow back to the oil tank (1).
2. The hydraulic system of the aerial lift truck as claimed in claim 1, characterized in that a reversing valve (6) is arranged between the one-way valve (9) and the first damper (5).
3. The hydraulic system of the aerial work platform as claimed in claim 2, wherein a filter (3) is arranged at one end of the oil return path connected with the oil tank (1).
4. The hydraulic system of the aerial work platform as claimed in claim 3, wherein a first overflow valve (4) is arranged between the hydraulic pump (2) and the reversing valve (6), and an outlet of the first overflow valve (4) is connected with an inlet of the filter (3).
5. The hydraulic system of the aerial work platform as claimed in claim 3, wherein a second overflow valve (7) is arranged between the reversing valve (6) and the one-way valve (9), and an outlet of the second overflow valve (7) is connected with an inlet of the filter (3).
6. The hydraulic system of an aerial work platform according to any one of claims 1 to 5, wherein the hydraulic system comprises an oil drain circuit which connects the rodless cavity of the oil cylinder (11) with the oil tank (1), and the oil drain circuit is provided with a control valve (10) and a second damper (8) so as to discharge hydraulic oil in the rodless cavity of the oil cylinder (11) to the oil tank (1) through the control valve (10) and the second damper (8) in sequence.
7. A scissor lift truck comprising the lift truck hydraulic system of any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122180474.7U CN215439563U (en) | 2021-09-09 | 2021-09-09 | Hydraulic system of overhead working truck and scissor-fork type overhead working truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122180474.7U CN215439563U (en) | 2021-09-09 | 2021-09-09 | Hydraulic system of overhead working truck and scissor-fork type overhead working truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215439563U true CN215439563U (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122180474.7U Active CN215439563U (en) | 2021-09-09 | 2021-09-09 | Hydraulic system of overhead working truck and scissor-fork type overhead working truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215439563U (en) |
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2021
- 2021-09-09 CN CN202122180474.7U patent/CN215439563U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hunan Xingbang Machinery Equipment Co.,Ltd. Assignor: Hunan Xingbang Intelligent Equipment Co.,Ltd. Contract record no.: X2024980000714 Denomination of utility model: A hydraulic system for high-altitude work vehicles and a scissor type high-altitude work vehicle Granted publication date: 20220107 License type: Common License Record date: 20240117 |