CN212220016U - Limiting device for hydraulic pilot control lifting system and mining dump truck - Google Patents
Limiting device for hydraulic pilot control lifting system and mining dump truck Download PDFInfo
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- CN212220016U CN212220016U CN202020947851.8U CN202020947851U CN212220016U CN 212220016 U CN212220016 U CN 212220016U CN 202020947851 U CN202020947851 U CN 202020947851U CN 212220016 U CN212220016 U CN 212220016U
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- 238000005065 mining Methods 0.000 title claims abstract description 10
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 31
- 239000003921 oil Substances 0.000 claims abstract description 26
- 230000009471 action Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 238000012856 packing Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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Abstract
A limiting device for a hydraulic pilot control lifting system and a mining dump truck, wherein the limiting device comprises a lifting handle, an electromagnetic directional valve, a lifting valve, a pilot hydraulic pump, a lifting oil cylinder, a gear handle, a hydraulic pump and a hydraulic oil tank; a controller is connected between the gear handle and the electromagnetic directional valve, when the controller detects that the gear handle is in a non-P gear state, the electromagnetic directional valve works at the left position of the electromagnetic directional valve, and hydraulic oil output by the lifting handle is cut off; when the controller detects that the gear handle is in a P gear state, the electromagnetic directional valve works at the right position of the electromagnetic directional valve, and hydraulic oil output by the lifting handle enters the lifting valve, so that the lifting oil cylinder runs. When the container is lifted to the position switch under the action of the lifting oil cylinder, the electromagnetic directional valve works at the left position of the electromagnetic directional valve. The utility model discloses make mining truck can realize automatic limit function at the in-process that lifts, make the packing box automatic shutdown after lifting the angle of settlement lift, the descending action.
Description
Technical Field
The utility model relates to a stop device for hydraulic pressure guide control lifting system belongs to the mining machinery field.
Background
The mining dump truck has the advantages of heavy load, high working efficiency and the like, and is widely applied to large-scale surface mine exploitation and earthwork construction engineering. Because the hydraulic elements have high power density and are convenient to arrange, the hydraulic system is responsible for the functions of steering, braking, lifting and the like of the vehicle.
In actual design and application, a hydraulic lifting system is in hydraulic pilot control, namely, a high-pressure low-flow hydraulic oil is used as a pilot control signal to control the high-pressure high-flow lifting system, but the hydraulic pilot control is generally implemented through manual operation, but the manual operation has errors and is not favorable for realizing automatic control, so that the conventional hydraulic pilot control lifting system mainly realizes passive limiting through a hydraulic lifting oil cylinder during lifting, and the hydraulic lifting oil cylinder can generate great impact on the hydraulic oil cylinder, so that the hydraulic oil cylinder is easily damaged, and even the hydraulic cylinder is pulled out.
Disclosure of Invention
The utility model aims at providing a stop device for hydraulic pressure pilot control lifts system, aim at makes mining truck can realize automatic limit function at the in-process of lifting through this function, makes the packing box automatic shutdown after lifting the angle of settlement lift, the descending action.
In order to realize the purpose, the utility model discloses a technical scheme is:
a limiting device for a hydraulic pilot control lifting system comprises a lifting handle, an electromagnetic directional valve, a lifting valve, a pilot hydraulic pump, a lifting oil cylinder, a gear handle, a hydraulic pump and a hydraulic oil tank; one end of the lifting handle is connected with the electromagnetic directional valve, the electromagnetic directional valve is connected with the lifting valve, the lifting valve is connected with the lifting handle, and the lifting oil cylinder is connected with the lifting valve; one end of the pilot hydraulic pump is connected with the hydraulic oil tank, and the other end of the pilot hydraulic pump is connected with the lifting handle; one end of the hydraulic pump is connected with the hydraulic oil tank, and the other end of the hydraulic pump is connected with the lifting valve; a controller is connected between the gear handle and the electromagnetic directional valve, when the controller detects that the gear handle is in a non-P gear state, the electromagnetic directional valve works at the left position of the electromagnetic directional valve, and hydraulic oil output by the lifting handle is cut off; when the controller detects that the gear handle is in a P gear state, the electromagnetic directional valve works at the right position of the electromagnetic directional valve, and hydraulic oil output by the lifting handle enters the lifting valve, so that the lifting oil cylinder runs.
Further, the controller is connected with a position switch, when the container is lifted to the position switch under the action of the lifting oil cylinder, the position switch is closed, and after receiving a closing signal of the position switch, the controller sends a signal to the electromagnetic directional valve, so that the electromagnetic directional valve works at the left position of the electromagnetic directional valve.
Further, the position switch adopts a proximity sensor, the proximity sensor is composed of a transmitting part and a receiving part, the transmitting part is installed at the top end of the tail part of the container, the receiving part is installed at the tail part of the frame, and the distance from the top end of the tail part of the container to the tail part of the frame is monitored in real time through the proximity sensor.
A mining dump truck is provided with the limiting device for the hydraulic pilot control lifting system.
After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has:
the position state of a container and the state of a vehicle gear handle are monitored in real time by adding a position switch and a controller, hydraulic pilot pressure oil is controlled by adding an electromagnetic directional valve, the position controller sends a control signal to the electromagnetic directional valve when the container is lifted or descended, the hydraulic oil of a lifting system is cut off actively by controlling the hydraulic pilot pressure oil, the stretching impact on a hydraulic oil cylinder is avoided, and the stability and the lifting experience of a vehicle are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
In the drawings:
FIG. 1 is a schematic view of the hydraulic principle of the present invention;
the labels in the figure are: the hydraulic lifting device comprises a lifting handle 1, an electromagnetic directional valve 2, an electromagnetic directional valve left position 2.1, an electromagnetic directional valve right position 2.2, a lifting valve 3, a lifting valve left pilot port 3.1, a pilot hydraulic pump 4, a lifting oil cylinder 5, a gear handle 6, a controller 7, a hydraulic pump 8, a hydraulic oil tank 9 and a position switch 10.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a limiting device for a hydraulic pilot control lifting system comprises a lifting handle 1, an electromagnetic directional valve 2, a lifting valve 3, a pilot hydraulic pump 4, a lifting oil cylinder 5, a gear handle 6, a hydraulic pump 8 and a hydraulic oil tank 9; one end of a lifting handle 1 is connected with an electromagnetic directional valve 2, the electromagnetic directional valve 2 is connected with a lifting valve 3, the lifting valve 3 is connected with the lifting handle 1, and a lifting oil cylinder 5 is connected with the lifting valve 3; one end of the pilot hydraulic pump 4 is connected with the hydraulic oil tank 9, and the other end is connected with the lifting handle 1; one end of the hydraulic pump 8 is connected with the hydraulic oil tank 9, and the other end is connected with the lifting valve 3; a controller 7 is connected between the gear handle 6 and the electromagnetic directional valve 2, when the controller 7 detects that the gear handle 6 is in a non-P gear state, the electromagnetic directional valve 2 works at the left position 2.1 of the electromagnetic directional valve, and hydraulic oil output by the lifting handle 1 is stopped; when the controller 7 detects that the gear handle 6 is in a P-gear state, the electromagnetic directional valve 2 works at the right position 2.2 of the electromagnetic directional valve, and hydraulic oil output by the lifting handle 1 enters the lifting valve 3, so that the lifting oil cylinder 5 runs.
Further scheme: the controller 7 is also connected with a position switch 10, when the container is lifted to the position switch 10 under the action of the lifting oil cylinder 5, the position switch 10 is closed, and after receiving a closing signal of the position switch 10, the controller 7 sends a signal to the electromagnetic directional valve 2, so that the electromagnetic directional valve 2 works at the left position 2.1 of the electromagnetic directional valve.
Preferably, the position switch 10 is a proximity sensor, which is composed of a transmitting part and a receiving part, wherein the transmitting part is installed at the top end of the tail of the cargo box, the receiving part is installed at the tail of the vehicle frame, and the distance from the top end of the tail of the cargo box to the tail of the vehicle frame is monitored in real time through the proximity sensor. When the container is lifted, the top end of the tail of the container is farthest away from the frame, the top end of the tail of the container is closer to the frame along with the lifting of the container, and a closing signal is sent to the controller 7 after the container reaches a preset distance.
The working process of the present invention is further explained with reference to fig. 1 below:
the working state of the gear handle 6 is divided into a P gear and a non-P gear, when the vehicle needs to be lifted, the gear handle 6 needs to be in the P gear, and when the vehicle runs, the gear handle is in the non-P gear.
Vehicle non-lifting state: when the vehicle is not lifted, the gear handle 6 is in a non-P-gear state, the controller 7 is connected with the gear handle 6 and the electromagnetic directional valve 2, when the gear handle 6 is in the non-P-gear state, the controller 7 enables the electromagnetic directional valve 2 to work at the left position 2.1 of the electromagnetic directional valve, when the electromagnetic directional valve 2 works at the left position 2.1 of the electromagnetic directional valve, hydraulic oil output by the lifting handle 1 is stopped, and the hydraulic oil cannot reach the left pilot port 3.1 of the lifting valve, so that the situation that a container is lifted due to misoperation of a driver in the driving process can be prevented. The electromagnetic directional valve 2 is connected with the lifting handle 1 and the lifting directional valve 3, and because the electromagnetic directional valve 2 is in the left position, a lifting pilot control signal sent by the lifting handle 1 cannot reach a lifting pilot port of the lifting directional valve 3, and the situation can prevent a cargo box from being lifted due to misoperation of a driver in the driving process of a vehicle.
Vehicle lifting state: when the gear handle 6 is in a P gear, the controller 7 enables the electromagnetic directional valve 2 to work at the right position 2.2 of the electromagnetic directional valve, at the moment, hydraulic oil output by the lifting handle 1 can reach the lifting valve left pilot port 3.1, the lifting valve 3 is in a lifting working condition under the action of the hydraulic oil of the lifting valve left pilot port 3.1, the lifting valve 3 is connected with the hydraulic pump 8 and the lifting oil cylinder 5, and the hydraulic oil output by the hydraulic pump 8 enters the lifting oil cylinder 5 to enable the lifting oil cylinder 5 to extend out due to the fact that the lifting valve 3 is in the lifting working condition, and a vehicle enters a lifting state.
Lifting and limiting states: when the container is lifted to a preset position under the action of the lifting oil cylinder 5, the position switch 10 is closed, the position switch 10 is connected with the controller 7, the controller 7 sends a signal to the electromagnetic directional valve 2 after receiving a closing signal of the position switch 10, so that the electromagnetic directional valve 2 works at the left position 2.1 of the electromagnetic directional valve, at the moment, hydraulic oil output by the lifting handle 1 is cut off by the electromagnetic directional valve 2, pressure oil at the left pilot port 3.1 of the lifting valve disappears, the lifting valve 3 leaves a lifting working condition, hydraulic oil output by the hydraulic pump 8 is cut off by the lifting valve 3, the lifting oil cylinder 5 stops lifting, and the lifting limiting function is realized.
The utility model also discloses a mining dump truck installs foretell a stop device that is used for hydraulic pressure guide control lifting system.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are also meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use the combination according to the known technical solutions and technical problems to be solved by the present application.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments by utilizing the above technical contents without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical matters of the present invention are within the scope of the present invention.
Claims (4)
1. A stop device for hydraulic pilot control lifting system which characterized in that:
the hydraulic lifting device comprises a lifting handle, an electromagnetic reversing valve, a lifting valve, a pilot hydraulic pump, a lifting oil cylinder, a gear handle, a hydraulic pump and a hydraulic oil tank;
one end of the lifting handle is connected with the electromagnetic directional valve, the electromagnetic directional valve is connected with the lifting valve, the lifting valve is connected with the lifting handle, and the lifting oil cylinder is connected with the lifting valve;
one end of the pilot hydraulic pump is connected with the hydraulic oil tank, and the other end of the pilot hydraulic pump is connected with the lifting handle;
one end of the hydraulic pump is connected with the hydraulic oil tank, and the other end of the hydraulic pump is connected with the lifting valve;
a controller is connected between the gear handle and the electromagnetic directional valve, when the controller detects that the gear handle is in a non-P gear state, the electromagnetic directional valve works at the left position of the electromagnetic directional valve, and hydraulic oil output by the lifting handle is cut off; when the controller detects that the gear handle is in a P gear state, the electromagnetic directional valve works at the right position of the electromagnetic directional valve, and hydraulic oil output by the lifting handle enters the lifting valve, so that the lifting oil cylinder runs.
2. The limit device for a hydraulic pilot controlled lifting system according to claim 1, characterized in that:
the controller is also connected with the position switch, when the container is lifted to the position switch under the action of the lifting oil cylinder, the position switch is closed, and the controller sends a signal to the electromagnetic directional valve after receiving a closing signal of the position switch, so that the electromagnetic directional valve works at the left position of the electromagnetic directional valve.
3. A spacing device for a hydraulic pilot controlled lifting system according to claim 2, characterized in that:
the position switch adopts a proximity sensor, the proximity sensor consists of a transmitting part and a receiving part, the transmitting part is arranged at the top end of the tail part of the container, the receiving part is arranged at the tail part of the frame, and the distance from the top end of the tail part of the container to the tail part of the frame is monitored in real time through the proximity sensor.
4. A mining dump truck is characterized in that: a limiting device for a hydraulic pilot-controlled lifting system according to any one of claims 1 to 3 is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020947851.8U CN212220016U (en) | 2020-05-29 | 2020-05-29 | Limiting device for hydraulic pilot control lifting system and mining dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020947851.8U CN212220016U (en) | 2020-05-29 | 2020-05-29 | Limiting device for hydraulic pilot control lifting system and mining dump truck |
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| Publication Number | Publication Date |
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| CN212220016U true CN212220016U (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020947851.8U Active CN212220016U (en) | 2020-05-29 | 2020-05-29 | Limiting device for hydraulic pilot control lifting system and mining dump truck |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112937402A (en) * | 2021-03-16 | 2021-06-11 | 安徽华菱汽车有限公司 | Dump truck and lifting control device thereof |
| CN114738337A (en) * | 2022-04-26 | 2022-07-12 | 三一重型装备有限公司 | Hydraulic control system and working machine |
-
2020
- 2020-05-29 CN CN202020947851.8U patent/CN212220016U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112937402A (en) * | 2021-03-16 | 2021-06-11 | 安徽华菱汽车有限公司 | Dump truck and lifting control device thereof |
| CN112937402B (en) * | 2021-03-16 | 2024-04-19 | 安徽华菱汽车有限公司 | Dump truck and lifting control device thereof |
| CN114738337A (en) * | 2022-04-26 | 2022-07-12 | 三一重型装备有限公司 | Hydraulic control system and working machine |
| CN114738337B (en) * | 2022-04-26 | 2024-10-01 | 三一重型装备有限公司 | Hydraulic control system and working machine |
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