CN216951074U - Electric control limiting hydraulic system for tractor lifter oil cylinder and tractor - Google Patents
Electric control limiting hydraulic system for tractor lifter oil cylinder and tractor Download PDFInfo
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- CN216951074U CN216951074U CN202221140435.2U CN202221140435U CN216951074U CN 216951074 U CN216951074 U CN 216951074U CN 202221140435 U CN202221140435 U CN 202221140435U CN 216951074 U CN216951074 U CN 216951074U
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Abstract
The utility model relates to an electric control limiting hydraulic system for a tractor lifter oil cylinder and a tractor, wherein the electric control limiting hydraulic system for the tractor lifter oil cylinder comprises a lifting oil cylinder, an oil tank, a first electric control valve group, a second electric control valve group, a multi-way valve, a first oil cylinder pipeline, a second oil cylinder pipeline and an oil return pipeline, wherein one end of the first oil cylinder pipeline is connected with a first cavity of the lifting oil cylinder, and the other end of the first oil cylinder pipeline is connected with the oil tank through the first electric control valve group; one end of a second oil cylinder pipeline is connected with the second cavity of the lifting oil cylinder, and the other end of the second oil cylinder pipeline is connected with the oil tank through a second electric control valve group; the first oil cylinder pipeline and the second oil cylinder pipeline are provided with multi-way valves; the second cavity of the oil cylinder, the first electric control valve group, the second electric control valve group and the multi-way valve are all connected with an oil return pipeline; the cylinder body of the lifting oil cylinder is provided with a first electric control switch, a piston rod of the lifting oil cylinder is provided with a limiting rod which is arranged corresponding to the first electric control switch, and the first electric control switch is connected with the first electric control valve group and the second electric control valve group respectively.
Description
Technical Field
The utility model relates to the technical field of tractors, in particular to an electric control limiting hydraulic system for an oil cylinder of a tractor lifter and a tractor.
Background
The strong pressure lifter oil cylinder for the tractor needs repeated ascending and descending functions of an auxiliary working device when the whole tractor is used, and the position of the strong pressure lifter oil cylinder is basically fixed. The existing hydraulic system has a complex structure, is not provided with a limiting mechanism, and cannot limit the oil cylinder.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electric control limiting hydraulic system for an oil cylinder of a tractor lifter and a tractor, aiming at solving one or more technical problems.
The technical scheme for solving the technical problems is as follows: an electric control limiting hydraulic system for a tractor lifter oil cylinder comprises a lifting oil cylinder, an oil tank, a first electric control valve group, a second electric control valve group, a multi-way valve, a first oil cylinder pipeline, a second oil cylinder pipeline and an oil return pipeline, wherein one end of the first oil cylinder pipeline is connected with a first cavity of the lifting oil cylinder, and the other end of the first oil cylinder pipeline is connected with the oil tank through the first electric control valve group; one end of the second oil cylinder pipeline is connected with the second cavity of the lifting oil cylinder, and the other end of the second oil cylinder pipeline is connected with the oil tank through a second electric control valve group; the first oil cylinder pipeline and the second oil cylinder pipeline are provided with multi-way valves; the second cavity of the oil cylinder, the first electric control valve group, the second electric control valve group and the multi-way valve are all connected with an oil return pipeline; the lifting oil cylinder is characterized in that a first electric control switch is arranged on a cylinder body of the lifting oil cylinder, a limiting rod which is arranged corresponding to the first electric control switch is arranged on a piston rod of the lifting oil cylinder, and the first electric control switch is connected with a first electric control valve group and a second electric control valve group respectively.
The utility model has the beneficial effects that: according to the utility model, the piston rod of the lifting oil cylinder is provided with the limiting rod, the cylinder body of the lifting oil cylinder is provided with the first electric control switch, when the piston rod of the lifting oil cylinder descends to the preset position, the limiting rod can touch the first electric control switch, so that the first electric control valve group and the second electric control valve group are closed, the lifting oil cylinder is locked at the preset position by the first electric control valve group and the second electric control valve group and is kept still, and the limiting purpose is achieved. And the position of gag lever post and first automatically controlled switch can be adjusted in a flexible way to satisfy different position demands.
On the basis of the technical scheme, the utility model can be further improved as follows.
Further, a second electric control switch and a valve rod capable of starting the second electric control switch are arranged on the multi-way valve, and the second electric control switch is connected with the first electric control valve group and the second electric control valve group respectively.
The beneficial effect of adopting the further scheme is that: through setting up the valve rod on the multiple unit valve, can be through pulling the valve rod control second electrical control switch on the multiple unit valve, utilize the switch of first electrical control valves of second electrical control switch control and second electrical control valves, after first electrical control valves and second electrical control valves are closed by the control of first electrical control switch, can open through first electrical control valves of second electrical control switch control and second electrical control valves, control each pipeline of lifting cylinder again.
The oil return pipeline is connected with the oil inlet channel of the first electric control valve group; and a stop valve is arranged on the oil drainage pipeline.
The beneficial effect of adopting the above further scheme is: through setting up the draining pipeline, through opening the stop valve, can directly return oil tank with the fluid of lifting cylinder second intracavity through the oil feed passageway of first automatically controlled valves.
Furthermore, an oil pump is arranged on the first oil cylinder pipeline and is positioned on a pipeline between the multi-way valve and the oil tank.
Further, a safety pipeline is connected between the first oil cylinder pipeline and the second oil cylinder pipeline, a safety valve is arranged on the safety pipeline, and the safety pipeline is located on a pipeline between the oil pump and the multi-way valve.
The beneficial effect of adopting the further scheme is that: through setting up safe pipeline, guaranteed entire system's security.
The oil-supplementing device further comprises an oil-supplementing pipeline, wherein one end of the oil-supplementing pipeline is connected with the second cavity of the lifting oil cylinder, and the other end of the oil-supplementing pipeline is respectively connected with the oil tank, the multi-way valve and the oil return pipeline; and an oil supplementing valve is arranged on the oil supplementing pipeline.
The oil supplementing pipeline is arranged, so that oil in the oil tank or oil in other pipelines enters the first cavity of the lifting oil cylinder through the oil supplementing pipeline under the action of negative pressure in the first cavity of the lifting oil cylinder.
Further, the first electronic control valve group comprises a lifting electromagnetic valve, a lifting valve and a lifting shuttle valve, the lifting shuttle valve is respectively connected with the lifting electromagnetic valve and the lifting valve, and the lifting electromagnetic valve is connected with the first electronic control switch.
Further, the second electric control valve group comprises a descending electromagnetic valve, a descending valve and a descending shuttle valve, the descending shuttle valve is respectively connected with the descending electromagnetic valve and the descending valve, and the descending electromagnetic valve is connected with the first electric control switch.
Furthermore, the number of the lifting oil cylinders is multiple, a first electric control switch is arranged on the cylinder body of at least one lifting oil cylinder, and a limiting rod arranged corresponding to the first electric control switch is arranged on the lifting oil cylinder.
The tractor comprises the electric control limiting hydraulic system for the tractor lifter oil cylinder.
The utility model has the beneficial effects that: the tractor adopts the electric control limiting hydraulic system for the oil cylinder of the tractor lifter, has simple operation and good structural safety, and can realize different lifting requirements of the oil cylinder.
Drawings
FIG. 1 is a schematic structural view of an electric control limiting hydraulic system for an oil cylinder of a tractor lifter according to the present invention;
FIG. 2 is a schematic structural diagram of the starting state of the electric control limit hydraulic system for the tractor lifter oil cylinder of the utility model;
FIG. 3 is a schematic structural diagram of the lifting state of the electric control limiting hydraulic system for the tractor lifter oil cylinder of the utility model;
FIG. 4 is a schematic structural view of the descending state of the electric control limit hydraulic system for the oil cylinder of the tractor lifter of the present invention;
FIG. 5 is a schematic structural diagram of the principle of the in-situ descending state of the electric control limiting hydraulic system for the tractor lifter oil cylinder.
In the drawings, the components represented by the respective reference numerals are listed below:
1. lifting the oil cylinder; 11. a limiting rod; 12. a first chamber; 13. a second chamber; 14. a piston rod; 2. an oil tank; 3. an oil pump; 4. a first electrically controlled switch; 5. a second electrically controlled switch; 6. a first electrically controlled valve block; 61. lifting the electromagnetic valve; 62. a poppet valve; 63. a poppet shuttle valve; 7. a second electric control valve group; 71. a descending solenoid valve; 72. a descent valve; 73. a drop shuttle valve; 8. a multi-way valve; 81. a valve stem; 9. a stop valve; 91. an oil replenishing valve; 92. a safety valve.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1 to 5, the electric control limiting hydraulic system for a tractor lifter oil cylinder of the present embodiment includes a lifting oil cylinder 1, an oil tank 2, a first electric control valve group 6, a second electric control valve group 7, a multi-way valve 8, a first oil cylinder pipeline, a second oil cylinder pipeline, and an oil return pipeline, wherein one end of the first oil cylinder pipeline is connected to a first cavity 12 of the lifting oil cylinder 1, and the other end is connected to the oil tank 2 through the first electric control valve group 6; one end of the second oil cylinder pipeline is connected with the second cavity 13 of the lifting oil cylinder 1, and the other end of the second oil cylinder pipeline is connected with the oil tank 2 through a second electric control valve group 7; the first oil cylinder pipeline and the second oil cylinder pipeline are provided with multi-way valves 8; the second cavity 13 of the lifting oil cylinder 1, the first electric control valve group 6, the second electric control valve group 7 and the multi-way valve 8 are all connected with an oil return pipeline; be equipped with first electric control switch 4 on the cylinder body of lift cylinder 1, be equipped with the gag lever post 11 that corresponds the arrangement with first electric control switch 4 on the piston rod 14 of lift cylinder 1, first electric control switch 4 is connected with first electric control valve group 6 and second electric control valve group 7 respectively.
As shown in fig. 1 to 5, in the present embodiment, a second electronic control switch 5 and a valve rod 81 capable of starting the second electronic control switch 5 are disposed on the multi-way valve 8, and the second electronic control switch 5 is connected to the first electronic control valve group 6 and the second electronic control valve group 7 respectively. Through setting up the valve rod on the multiple unit valve, can be through pulling the valve rod control second electrical control switch on the multiple unit valve, utilize the switch of first electrical control valves of second electrical control switch control and second electrical control valves, after first electrical control valves and second electrical control valves are closed by the control of first electrical control switch, can open through first electrical control valves of second electrical control switch control and second electrical control valves, control each pipeline of lifting cylinder again.
As shown in fig. 1 to 5, the electric control limiting hydraulic system for the tractor lifter oil cylinder of the embodiment further includes an oil drainage pipeline, one end of the oil drainage pipeline is connected with an oil inlet channel of the first electric control valve group 6, and the other end of the oil drainage pipeline is connected with an oil return pipeline; and a stop valve 9 is arranged on the oil drainage pipeline. Through setting up the draining pipeline, through opening the stop valve, can directly return oil tank with the fluid of lifting cylinder second intracavity through the oil feed passageway of first automatically controlled valves.
Specifically, as shown in fig. 1 to 5, an oil pump 3 is arranged on the first oil cylinder pipeline, and the oil pump 3 is located on a pipeline between the multi-way valve 8 and the oil tank 2. And a safety pipeline is connected between the first cylinder pipeline and the second cylinder pipeline, the safety pipeline is provided with a safety valve 92, and the safety pipeline is positioned on a pipeline between the oil pump 3 and the multi-way valve 8. Through setting up safe pipeline, guaranteed entire system's security.
As shown in fig. 1 to 5, the electrically controlled limiting hydraulic system for a tractor lifter cylinder of the present embodiment further includes an oil supplementing pipeline, one end of the oil supplementing pipeline is connected to the second chamber 13 of the lifting cylinder 1, and the other end of the oil supplementing pipeline is connected to the oil tank 2, the multi-way valve 8 and the oil return pipeline respectively; and an oil supplementing valve 91 is arranged on the oil supplementing pipeline. Through setting up the oil supply pipeline, the first chamber of lifting cylinder is under the negative pressure effect, and fluid in the oil tank or the fluid in other pipelines enter into the first intracavity of lifting cylinder through the oil supply pipeline.
As shown in fig. 1 to 5, specifically, the first electronic valve group 6 of the present embodiment includes a lift solenoid valve 61, a lift valve 62, and a lift shuttle valve 63, the lift shuttle valve 63 is connected to the lift solenoid valve 61 and the lift valve 62, respectively, and the lift solenoid valve 61 is connected to the first electronic switch 4.
As shown in fig. 1 to 5, specifically, the second electronic valve set 7 of the present embodiment includes a descending solenoid valve 71, a descending valve 72, and a descending shuttle valve 73, the descending shuttle valve 73 is connected to the descending solenoid valve 71 and the descending valve 72, respectively, and the descending solenoid valve 71 is connected to the first electronic switch 4.
According to a specific scheme of this embodiment, the number of the lifting cylinders 1 is multiple, at least one of the lifting cylinders 1 is provided with a first electric control switch 4, and the lifting cylinder is provided with a limiting rod arranged corresponding to the first electric control switch. Preferably two, as shown in fig. 1 to 5.
As shown in fig. 1 to 5, the multi-way valve 8 of the present embodiment is provided with a valve rod 81, and the reversing operation of the multi-way valve 8 is realized by operating the valve rod 81.
The tractor hoist hydro-cylinder of this embodiment is with spacing hydraulic system of electric control when using:
in the starting state, after the engine is started, as shown in fig. 2, the oil pump 3 sucks oil from the oil tank 2, delivers the oil to the multi-way valve 8, and returns the oil to the oil tank 2 directly through the multi-way valve 8 and the oil return pipeline. At this time, the multi-way valve does not act, and the lifting oil cylinder 1 is kept still.
In the lifting state, as shown in fig. 3, when the multi-way valve 8 is shifted to the left position, the oil delivered from the oil pump 3 is delivered to the lift valve 62 through the multi-way valve 8, and at this time, both the lift solenoid valve 61 and the lower solenoid valve 71 are electrified. Oil enters the oil inlet channel of the poppet valve 62 through the first oil cylinder pipeline, so that the poppet valve 62 compresses the cavity (pilot control cavity) where the spring is located under the pressure action of the oil in the oil inlet channel, and pilot control oil in the cavity (pilot control cavity) where the spring of the poppet valve 62 is located enters the oil return pipeline through the lifting electromagnetic valve 61 and then returns to the oil tank 2. At this time, the oil enters the first cavity 12 of the lift cylinder 1 through the oil inlet channel of the lift valve 62, the piston rod 14 is upwardly extruded, the oil in the second cavity 13 of the lift cylinder 1 enters the oil inlet channel of the drop valve through the second cylinder pipeline, and the pilot control oil in the cavity where the drop valve 72 is compressed under the pressure of the oil in the oil inlet channel enters the oil return pipeline through the drop solenoid valve 71 and then flows back to the oil tank 2. And the oil entering the oil inlet channel of the descending valve continuously returns to the oil tank 2 through the second oil cylinder pipeline and the multi-way valve 8 on the second oil cylinder pipeline. Therefore, through the reversing of the multi-way valve 8, the lifting electromagnetic valve 61 and the descending electromagnetic valve 71 are electrified, oil enters the first cavity of the lifting oil cylinder 1, and the lifting function is realized.
In the lowering state, as shown in fig. 4, when the multi-way valve 8 is switched to the right position, the oil supplied from the oil pump 3 is supplied to the lowering valve 72 through the multi-way valve 8, and at this time, the raising solenoid valve 61 and the lowering solenoid valve 71 are both charged. Oil enters the oil inlet channel of the descending valve 72 through the second oil cylinder pipeline, so that the descending valve 72 compresses the cavity (pilot control cavity) where the spring of the descending valve 72 is located under the pressure of the oil in the oil inlet channel, and pilot control oil in the cavity where the spring of the descending valve 72 is located enters the oil return pipeline through the descending electromagnetic valve 71 and then returns to the oil tank 2. At this time, the oil enters the second chamber 13 of the lift cylinder through the oil inlet channel of the drop valve 72, the piston rod 14 is pressed downward, so that the oil in the first chamber 12 of the lift cylinder 1 enters the oil inlet channel of the poppet valve 62 through the first cylinder pipeline, and the pilot control oil in the chamber (pilot control chamber) where the poppet valve 62 compresses the spring under the pressure of the oil in the oil inlet channel enters the oil return pipeline through the lift solenoid valve 61, and then flows back to the oil tank 2. And the oil entering the oil inlet channel of the lift valve continuously returns to the oil tank 2 through the first oil cylinder pipeline and the multi-way valve 8 on the first oil cylinder pipeline. Therefore, through the reversing of the multi-way valve 8, the lifting electromagnetic valve 61 and the descending electromagnetic valve 71 are electrified, oil enters the second cavity of the lifting oil cylinder, and the descending function is realized.
In the descending process of the lifting oil cylinder, if the descending speed is too fast, the oil inlet insufficient stroke negative pressure in the second cavity of the lifting oil cylinder 1 is easily caused, at the moment, the oil supplementing valve 91 is opened, oil in the oil tank 2 can be directly supplemented into the second cavity of the lifting oil cylinder through the oil supplementing pipeline, and the purpose of supplementing the oil is achieved.
When the lifting oil cylinder 1 descends, if the limiting rod 11 contacts the first electric control switch 4, the electric signal at the moment can ensure that the lifting electromagnetic valve 61 and the descending electromagnetic valve 71 are not electrified, and the lifting oil cylinder 1 is locked at the position by the lifting valve 62 and the descending valve 72 and is kept still, so that the purpose of limiting is achieved. Meanwhile, the positions of the limiting rod 11 and the first electric control switch 4 can be flexibly adjusted to meet different limiting requirements.
When the lifting oil cylinder 1 is limited, if the lifting oil cylinder needs to be lifted again, only the multi-way valve 8 needs to be pushed to change to the left position, and meanwhile, the valve rod 81 of the multi-way valve 8 touches the second electric control switch 5, so that the lifting electromagnetic valve 61 and the descending electromagnetic valve 71 are electrified, and the lifting oil cylinder 1 can obtain the lifting function.
In the original descending state, after the engine is flamed out, the multi-way valve 8 is in the middle position, and at the moment, the lifting solenoid valve 61 and the descending solenoid valve 71 are not electrified and are in the left position. The lift cylinder 1 generates pressure oil in the first chamber under the action of load, at this time, the pressure oil directly acts on a chamber (pilot control chamber) where a spring of the poppet valve 62 is located through the lift shuttle valve 63 and the lift solenoid valve 61, and the pressure oil entering the chamber where the spring is located maintains the poppet valve 62 in a closed state together with the spring force in the chamber where the spring is located in the poppet valve 62. Therefore, the lift cylinder remains stationary. At this time, as shown in fig. 5, the lift solenoid valve 61 is manually pushed open, so that the pressure oil entering the lift valve 62, that is, the pilot control oil, directly returns to the oil tank 2 through the lift solenoid valve 61, the lift valve 62 is in an open position under the action of the pressure oil in the first cavity 12 of the lift cylinder 1, and at the same time, the stop valve 9 is opened, so that the pressure oil in the first cavity 12 of the lift cylinder 1 directly returns to the oil tank through the oil inlet channel of the lift valve 62, and meanwhile, under the action of the negative pressure in the second cavity 13 of the lift cylinder 1, the oil in the oil tank 2 is conveyed into the second cavity 13 of the lift cylinder 1 through the oil replenishing valve 91, thereby achieving the purpose of replenishing the oil.
This embodiment is through setting up the gag lever post on the piston rod of lifting cylinder to set up first electrical switch on the cylinder body of lifting cylinder, when the piston rod of lifting cylinder descends to preset position, the gag lever post can touch first electrical switch, makes first electrical valve group and second electrical valve group close, and the lifting cylinder is kept motionless at preset position by first electrical valve group and the locking of second electrical valve group, reaches spacing purpose. And the position of gag lever post and first automatically controlled switch can be adjusted in a flexible way to satisfy different position demands.
The embodiment also provides a tractor, which comprises the electric control limiting hydraulic system for the tractor lifter oil cylinder. The tractor of this embodiment adopts foretell tractor lifting mechanism for hydro-cylinder spacing hydraulic system of electric control, easy operation, and structural safety is good, can realize the promotion demand that the hydro-cylinder is different.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An electric control limiting hydraulic system for a tractor lifter oil cylinder is characterized by comprising a lifting oil cylinder, an oil tank, a first electric control valve group, a second electric control valve group, a multi-way valve, a first oil cylinder pipeline, a second oil cylinder pipeline and an oil return pipeline, wherein one end of the first oil cylinder pipeline is connected with a first cavity of the lifting oil cylinder, and the other end of the first oil cylinder pipeline is connected with the oil tank through the first electric control valve group; one end of the second oil cylinder pipeline is connected with the second cavity of the lifting oil cylinder, and the other end of the second oil cylinder pipeline is connected with the oil tank through a second electric control valve group; the first oil cylinder pipeline and the second oil cylinder pipeline are provided with multi-way valves; the second cavity of the lifting oil cylinder, the first electric control valve group, the second electric control valve group and the multi-way valve are all connected with an oil return pipeline; the hydraulic lifting device is characterized in that a first electric control switch is arranged on a cylinder body of the lifting oil cylinder, a limiting rod which is arranged corresponding to the first electric control switch is arranged on a piston rod of the lifting oil cylinder, and the first electric control switch is connected with a first electric control valve bank and a second electric control valve bank respectively.
2. The electric control limiting hydraulic system for the tractor lifter oil cylinder according to claim 1, characterized in that a second electric control switch and a valve rod capable of starting the second electric control switch are arranged on the multi-way valve, and the second electric control switch is respectively connected with the first electric control valve group and the second electric control valve group.
3. The electric control limiting hydraulic system for the oil cylinder of the tractor lifter according to claim 1, characterized by further comprising an oil drainage pipeline, wherein one end of the oil drainage pipeline is connected with an oil inlet channel of the first electric control valve group, and the other end of the oil drainage pipeline is connected with an oil return pipeline; and a stop valve is arranged on the oil drainage pipeline.
4. The electric control limiting hydraulic system for the tractor lifter oil cylinder according to claim 1, characterized in that an oil pump is arranged on the first oil cylinder pipeline, and the oil pump is positioned on a pipeline between the multi-way valve and an oil tank.
5. The electrically controlled hydraulic limiting system for the tractor lifter cylinder according to claim 4, wherein a safety line is connected between the first cylinder line and the second cylinder line, the safety line is provided with a safety valve, and the safety line is located on a line between the oil pump and the multi-way valve.
6. The electric control limiting hydraulic system for the oil cylinder of the tractor lifter according to claim 1, characterized by further comprising an oil supplementing pipeline, wherein one end of the oil supplementing pipeline is connected with the second cavity of the lifting oil cylinder, and the other end of the oil supplementing pipeline is respectively connected with an oil tank, a multi-way valve and an oil return pipeline; and an oil supplementing valve is arranged on the oil supplementing pipeline.
7. The hydraulic system for electrically controlling the limit of a tractor lifter cylinder according to claim 1, wherein the first set of electrically controlled valves includes a lift solenoid valve, a lift valve and a lift shuttle valve, the lift shuttle valve is connected to the lift solenoid valve and the lift valve, respectively, and the lift solenoid valve is connected to the first electrically controlled switch.
8. The electric control limit hydraulic system for the tractor lifter oil cylinder according to claim 1, characterized in that the second electric control valve group comprises a descending solenoid valve, a descending valve and a descending shuttle valve, the descending shuttle valve is respectively connected with the descending solenoid valve and the descending valve, and the descending solenoid valve is connected with the first electric control switch.
9. The electric control limiting hydraulic system for the tractor lifter oil cylinder according to claim 1, characterized in that the number of the lifting oil cylinders is plural, a first electric control switch is arranged on a cylinder body of at least one of the lifting oil cylinders, and a limiting rod arranged corresponding to the first electric control switch is arranged on the lifting oil cylinder.
10. A tractor comprising an electrically controlled hydraulic limit system for a tractor lifter cylinder according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221140435.2U CN216951074U (en) | 2022-05-13 | 2022-05-13 | Electric control limiting hydraulic system for tractor lifter oil cylinder and tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221140435.2U CN216951074U (en) | 2022-05-13 | 2022-05-13 | Electric control limiting hydraulic system for tractor lifter oil cylinder and tractor |
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| CN216951074U true CN216951074U (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221140435.2U Active CN216951074U (en) | 2022-05-13 | 2022-05-13 | Electric control limiting hydraulic system for tractor lifter oil cylinder and tractor |
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| Country | Link |
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| CN (1) | CN216951074U (en) |
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2022
- 2022-05-13 CN CN202221140435.2U patent/CN216951074U/en active Active
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Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee after: Weichai Lovol Intelligent Agricultural Technology Co.,Ltd. Address before: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee before: Weichai leiwo Heavy Industry Co.,Ltd. |
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