CN115977195A - Remote control loader hydraulic system and remote control loader - Google Patents
Remote control loader hydraulic system and remote control loader Download PDFInfo
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- CN115977195A CN115977195A CN202211590762.2A CN202211590762A CN115977195A CN 115977195 A CN115977195 A CN 115977195A CN 202211590762 A CN202211590762 A CN 202211590762A CN 115977195 A CN115977195 A CN 115977195A
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Abstract
The invention discloses a remote control loader hydraulic system and a remote control loader in the technical field of remote control loaders, wherein the remote control loader hydraulic system comprises a gear pump, a steering control valve, a steering gear and a steering oil cylinder; an oil outlet of the gear pump is connected with a port P of the steering control valve, and a port P1 of the steering control valve is connected with a port P of the steering gear; the R port and the L port of the steering control valve are respectively connected with a steering oil cylinder; the R port and the L port of the steering gear are respectively connected with a steering oil cylinder; the steering control valve is provided with a steering electric handle and a steering button, the steering button is used for switching the working mode of the remote control loader into a manual mode or an electric control mode, and the steering electric handle is used for controlling the remote control loader to steer in the electric control mode. The steering control valve and the remote control loader hydraulic system have the characteristics of simple structure, flexible control, low manufacturing and using cost, suitability for electric control and large-scale popularization and application of the loader steering system and the like.
Description
Technical Field
The invention belongs to the technical field of remote control loaders, and particularly relates to a hydraulic system of a remote control loader and the remote control loader.
Background
Because the working environment of the underground loader for the mine is extremely severe, and because of the importance on safety, the underground loader for the mine has come out of the country, and the underground operation for the mine must be provided with a vehicle driven by wireless remote control. In the prior art, the steering control system of the remote control loader has high cost, and is not beneficial to large-scale popularization and application of the remote control loader.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a remote control loader hydraulic system and a remote control loader, which have the characteristics of simple structure, flexible control, low manufacturing and using cost, suitability for electric control, large-scale popularization and application and the like of a loader steering system.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
in a first aspect, a remote control loader hydraulic system is provided, which comprises a gear pump, a steering control valve, a steering gear and a steering oil cylinder; an oil outlet of the gear pump is connected with a port P of the steering control valve, and a port P1 of the steering control valve is connected with a port P of the steering gear; the R port and the L port of the steering control valve are respectively connected with the steering oil cylinder; the R port and the L port of the steering gear are respectively connected with the steering oil cylinder; the steering control valve is provided with a steering electric handle and a steering button, the steering button is used for switching the working mode of the remote control loader into a manual mode or an electric control mode, and the steering electric handle is used for controlling the remote control loader to steer in the electric control mode.
Furthermore, the steering control valve comprises a control valve, an electric proportional reversing valve, an electromagnetic switching valve and an overflow valve; the oil inlet of the control valve and the port P of the electric proportional reversing valve are respectively connected with the port P of the steering control valve; the oil outlet of the control valve is respectively connected with the port P1 and the port M of the steering control valve; the LS port of the electric proportional reversing valve is respectively connected with the control end X2 of the control valve and the oil inlet of the overflow valve; a working oil port of the electric proportional reversing valve is connected with an oil inlet of the electromagnetic switching valve; an oil outlet of the electromagnetic switching valve is connected with an R port and an L port of the steering control valve; the steering electric handle is electrically connected with electromagnets WA2 and WA1 of the electric proportional reversing valve, and the steering button is electrically connected with an electromagnet WA3 of the electromagnetic switching valve.
Furthermore, in a manual mode, a steering electric handle and a steering button are not operated, electromagnets WA1 and WA2 of the electric proportional reversing valve and an electromagnet WA3 of the electromagnetic switching valve are not powered, the electric proportional reversing valve is in a middle position O type function, an LS port of the electric proportional reversing valve does not have an oil pressure signal, the oil pressure of a gear pump is acted on an X1 end of the control valve, compared with the oil pressure signal and the spring force of the LS port acted on an X2 end of the control valve, the oil outlet pressure is increased to overcome the spring force of the X2 end of the control valve, a valve core moves to the right, and a P port of the steering control valve is communicated with a P1 port; at the moment, the steering wheel of the steering gear is operated, and hydraulic oil enters the steering oil cylinder through the L port or the R port of the steering gear to realize steering.
Further, a steering button is pressed down to enter an electric control mode, an electromagnet WA3 of the electromagnetic switching valve is electrified in the electric control mode, a steering electric handle is pushed to an L position when the vehicle turns left, an electromagnet WA2 of the electromagnetic switching valve is electrified, hydraulic oil output by the gear pump enters a steering oil cylinder through the electric proportional directional valve and the electromagnetic switching valve to realize left turning; otherwise, the steering electric handle is pushed to the R position, so that the right steering is realized; at this time, the control valve is in an open circuit under the action of oil pressure at two ends X1 and X2 of the control valve and spring force at the end X2 of the control valve, and the port P1 of the steering control valve are not communicated.
Further, the setting method of the X2 end spring force of the control valve comprises the following steps: in the electric control mode, Δ P = P 0 - LS 0 The spring force F > [ delta ] P at the X2 end of the control valve; wherein, P 0 Is the outlet hydraulic oil pressure of the gear pump; LS (least squares) 0 Is the hydraulic oil pressure of the LS port of the electric proportional directional control valve.
Furthermore, the electric proportional directional valve realizes proportional control of valve core opening by controlling current magnitude, and is used for controlling steering speed.
Furthermore, the port M of the steering control valve is connected to a pressure switch, and the pressure switch is electrically connected to the electromagnet WA3 of the electromagnetic switching valve and the electromagnets WA2 and WA1 of the electric proportional directional valve, respectively.
Further, the electric proportional reversing valve is a three-position five-way electromagnetic reversing valve.
Further, the electromagnetic switching valve is a two-position four-way electromagnetic valve.
In a second aspect, a remote control loader is provided, which is equipped with the remote control loader hydraulic system of the first aspect.
Compared with the prior art, the invention has the following beneficial effects: the steering control valve replaces a priority valve in a traditional loader steering system, and the electric control of the loader steering system is realized on the basis of the original steering mode; the electric control device has the characteristics of simple structure, flexible control, low manufacturing and using cost, suitability for electric control and large-scale popularization and application of the steering system of the loader and the like.
Drawings
FIG. 1 is a schematic diagram of a hydraulic system of a remote loader according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of the steering control valve of FIG. 1;
in the figure: 1. a gear pump; 2. a steering control valve; 3. a diverter; 4. a steering cylinder; 5. a control valve; 6. an electrically proportional reversing valve; 7. an electromagnetic switching valve; 8. an overflow valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
as shown in fig. 1 and 2, the hydraulic system of the remote control loader comprises a gear pump 1, a steering control valve 2, a steering gear 3 and a steering oil cylinder 4; an oil outlet of the gear pump 1 is connected with a port P of the steering control valve 2, and a port P1 of the steering control valve 2 is connected with a port P of the steering gear 3; the R port and the L port of the steering control valve 2 are respectively connected with a steering oil cylinder 4; the R port and the L port of the steering gear 3 are respectively connected with a steering oil cylinder 4; the steering control valve 2 is provided with a steering electric handle and a steering button, the steering button is used for switching the working mode of the remote control loader into a manual mode or an electric control mode, and the steering electric handle is used for controlling the remote control loader to steer in the electric control mode.
The steering control valve 2 comprises a control valve 5, an electric proportional directional valve 6, an electromagnetic switching valve 7, an overflow valve 8, a port P for connecting a hydraulic oil supply pipeline (the hydraulic oil supply pipeline is connected with the outlet of the gear pump 1), a port M for connecting a pressure switch, an auxiliary oil port P1, a port T for connecting a hydraulic oil tank, and a port R and a port L for connecting the steering oil cylinder 4. The control valve 5 is a two-position two-way reversing valve, and the two control cavities are respectively connected with an oil outlet of the control valve 5 and an LS port of the electric proportional reversing valve 6; the electric proportional reversing valve 6 is a three-position five-way electromagnetic reversing valve, and comprises an LS oil port besides P, T, A and B oil ports, and a middle position can be in an O shape; the electromagnetic switching valve 7 is a two-position four-way electromagnetic valve and comprises oil ports A, B, L and R; the overflow valve 8 is connected with the LS port of the electric proportional directional valve 6.
The electric steering handle is electrically connected with electromagnets WA2 and WA1 of the electric proportional directional valve 6, and the steering button is electrically connected with an electromagnet WA3 of the electromagnetic switching valve 7.
The steering electric handle is a single-connection three-position handle (L-O-R), the L position is electrified corresponding to the electromagnet WA2, the R position is electrified corresponding to the electromagnet WA1, and the O position is not electrified corresponding to the electromagnets WA1 and WA 2. The turning button is a two-position button (S-O), when the S-position button is pressed, the electromagnet WA3 is powered on, the O-position button is reset, and the electromagnet WA3 is powered off.
An oil inlet of the control valve 5 and a port P of the electric proportional reversing valve 6 are respectively connected with a port P of the steering control valve 2; an oil outlet of the control valve 5 is respectively connected with a port P1 and a port M of the steering control valve 2; an LS port of the electric proportional reversing valve 6 is respectively connected with an X2 end of the control valve 5 and an oil inlet of the overflow valve 8; a working oil port of the electric proportional reversing valve 6 is connected with an oil inlet of the electromagnetic switching valve 7; an oil outlet of the electromagnetic switching valve 7 is connected with an R port and an L port of the steering control valve 2; and a T port of the electric proportional directional valve 6 and a T port of the overflow valve 8 are respectively connected with a T port of the steering control valve 2.
The port M of the steering control valve 2 is connected to a pressure switch, and the pressure switch is electrically connected to a control port WA3 of the electromagnetic switching valve 7 and control ports WA2 and WA1 of the electric proportional directional valve 6, respectively.
The overflow valve 8 is connected with an LS port of the electric proportional reversing valve 6, the electric proportional reversing valve 6 is a three-position five-way electromagnetic reversing valve, and the electric proportional reversing valve comprises an LS oil port besides the P, T, A and B oil ports. The electromagnetic switching valve 7 is a two-position four-way electromagnetic valve and comprises oil ports A, B, L and R.
The hydraulic system of the remote control loader comprises a manual steering control mode and an electric control mode, and the two steering modes can be mutually interlocked.
In the manual mode, the manually controlled hydraulic steering is achieved by manipulating the steering wheel of the steering gear 3. At the moment, the electric proportional directional valve 6 is in a middle position, the oil outlet pressure of the gear pump 1 acts on the X1 end of the control valve 5, the valve core moves to the right, and the oil of the gear pump acts on the P port of the steering gear 3 from the P1 port through the control valve 5. The center of the steering gear 3 is open, and oil flows from P to T. When the steering wheel of the steering gear 3 is operated to turn left, oil in the port P1 of the control valve 5 enters the steering oil cylinder 4 from the port P to the port L of the steering gear 3, and left steering is realized. When the steering wheel of the steering gear 3 is operated to turn right, oil in a port P1 of the control valve 5 enters the steering oil cylinder 4 from a port P to a port R of the steering gear 3, and right steering is realized. Meanwhile, the pressure switch detects that a steering pressure signal of a port P1 of the control valve 5 can automatically cut off current signals of electromagnets WA1, WA2 and WA3 of the electric proportional directional valve 6, so that misoperation of electric control steering during manual steering is prevented.
When remote control steering is needed underground, a steering button is pressed down, the WA3 electromagnet is electrified, and therefore the electric control mode is started. When the left turn is carried out, the steering electric handle is pushed to the L position, the WA2 electromagnet is electrified, oil of the gear pump 1 enters the steering oil cylinder 4 from the port P to the port L through the steering control valve 2, and the left turn is realized. When the steering control valve 2 is turned to the right, the steering electric handle is pushed to the R position, the WA1 electromagnet is electrified, oil of the gear pump 1 enters the steering oil cylinder 4 from the port P to the port R through the steering control valve 2, and the right turning is realized. In the steering process, the electric proportional directional valve 6 leads oil pressure of a port P into the end X2 of the control valve 5 through an port LS, and the valve core moves leftwards, so that oil from the port P to the port P1 of the steering control valve 2 is cut off, and the manual steering operation in the electric control steering process is prevented.
The setting method of the X2 end spring force of the control valve comprises the following steps: in the electric control mode, Δ P = P 0 - LS 0 The spring force F > [ delta ] P at the X2 end of the control valve; wherein, P 0 Is the outlet hydraulic oil pressure of the gear pump; LS (least squares) 0 Is the hydraulic oil pressure of the LS port of the electric proportional directional control valve. This arrangement causes the port P of the steering control valve 2 to be not communicated with the port P1 of the steering control valve 2.
The electric proportional directional valve 6 can control the proportional control of the opening of the valve core by controlling the current, thereby controlling the steering speed and achieving the same effect as that of controlling the steering wheel to control the steering speed.
The electric control steering mode is also provided with a safety protection function for preventing the steering of the steering electric handle from being touched by mistake, the steering control valve 2 is provided with an electromagnetic switching valve 7, a steering button is pressed, a WA3 electromagnet of the electromagnetic switching valve 7 is electrified, and the electromagnetic switching valve 7 is in a switch-on position, so that the electric control steering can be realized.
Example two:
based on the hydraulic system of the remote control loader described in the first embodiment, the present embodiment provides a remote control loader, and the remote control loader is configured with the hydraulic system of the remote control loader described in the first embodiment.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (10)
1. A remote control loader hydraulic system is characterized by comprising a gear pump (1), a steering control valve (2), a steering gear (3) and a steering oil cylinder (4);
an oil outlet of the gear pump (1) is connected with a port P of the steering control valve (2), and a port P1 of the steering control valve (2) is connected with a port P of the steering gear (3); the R port and the L port of the steering control valve (2) are respectively connected with the steering oil cylinder (4); an R port and an L port of the steering gear (3) are respectively connected with the steering oil cylinder (4);
the steering control valve (2) is provided with a steering electric handle and a steering button, the steering button is used for switching the working mode of the remote control loader into a manual mode or an electric control mode, and the steering electric handle is used for controlling the remote control loader to steer in the electric control mode.
2. The remote control loader hydraulic system according to claim 1, characterized in that the steering control valve (2) comprises a control valve (5), an electric proportional directional valve (6), an electromagnetic switching valve (7), an overflow valve (8);
an oil inlet of the control valve (5) and a P port of the electric proportional reversing valve (6) are respectively connected with a P port of the steering control valve (2); the oil outlet of the control valve (5) is respectively connected with the port P1 and the port M of the steering control valve (2); an LS port of the electric proportional directional valve (6) is respectively connected with a control end X2 of the control valve (5) and an oil inlet of the overflow valve (8); a working oil port of the electric proportional directional valve (6) is connected with an oil inlet of the electromagnetic switching valve (7); an oil outlet of the electromagnetic switching valve (7) is connected with an R port and an L port of the steering control valve (2);
the steering electric handle is electrically connected with electromagnets WA2 and WA1 of the electric proportional reversing valve (6), and the steering button is electrically connected with an electromagnet WA3 of the electromagnetic switching valve (7).
3. The remote control loader hydraulic system according to claim 2, wherein in the manual mode, the steering electric handle and the steering button are not operated, the electromagnets WA1 and WA2 of the electric proportional directional valve (6) and the electromagnet WA3 of the electromagnetic directional valve (7) are not powered, the electric proportional directional valve (6) is in a neutral O type function, the LS port of the electric proportional directional valve (6) has no oil pressure signal, the oil outlet pressure of the gear pump (1) acts on the X1 end of the control valve (5), the oil outlet pressure is increased to overcome the spring force of the X2 end of the control valve (5) compared with the oil pressure signal and the spring force of the LS port acting on the X2 end of the control valve (5), the valve core moves to the right, and the P port of the steering control valve (2) is communicated with the P1 port; at the moment, the steering wheel of the steering gear (3) is operated, and hydraulic oil enters the steering oil cylinder (4) through an L port or an R port of the steering gear (3) to realize steering.
4. The hydraulic system of the remote control loader as claimed in claim 2, wherein a steering button is pressed to enter an electric control mode, in the electric control mode, an electromagnet WA3 of an electromagnetic switching valve (7) is electrified, when the vehicle turns left, a steering electric handle is pushed to an L position, an electromagnet WA2 of the electromagnetic switching valve (7) is electrified, hydraulic oil output by the gear pump (1) enters the steering cylinder (4) through the electric proportional directional valve (6) and the electromagnetic switching valve (7) to realize left turning; otherwise, the steering electric handle is pushed to the R position, so that the right steering is realized; at the moment, the control valve (5) is in an open circuit state under the action of oil pressure at two ends X1 and X2 of the control valve (5) and spring force at the end X2 of the control valve (5), and a port P1 of the steering control valve (2) are not communicated.
5. A remote-controlled loader hydraulic system according to claim 3 or 4 characterized in that the X2 end spring force of the control valve (5) is set by:
in the electric control mode, Δ P = P 0 - LS 0 The spring force F > [ delta ] P at the X2 end of the control valve (5);
wherein, P 0 The outlet hydraulic oil pressure of the gear pump (1); LS (least squares) 0 Is the hydraulic oil pressure of the LS opening of the electric proportional directional control valve (6).
6. The remote control loader hydraulic system according to claim 2, characterized in that the electric proportional directional valve (6) realizes proportional control of spool opening by controlling current magnitude for controlling steering speed.
7. The remote-controlled loader hydraulic system according to claim 2, characterized in that the port M of the steering control valve (2) is connected to pressure switches that are electrically connected to the electromagnets WA3 of the electromagnetic switching valve (7) and the electromagnets WA2 and WA1 of the electrically proportional reversing valve (6), respectively.
8. The remote control loader hydraulic system of claim 2, wherein the electro proportional directional valve (6) is a three-position five-way electromagnetic directional valve.
9. A remote-controlled loader hydraulic system according to claim 2 where the electromagnetic switching valve (7) is a two-position four-way solenoid valve.
10. A remote control loader, characterized in that the remote control loader is provided with the hydraulic system of the remote control loader according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211590762.2A CN115977195A (en) | 2022-12-12 | 2022-12-12 | Remote control loader hydraulic system and remote control loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211590762.2A CN115977195A (en) | 2022-12-12 | 2022-12-12 | Remote control loader hydraulic system and remote control loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115977195A true CN115977195A (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211590762.2A Pending CN115977195A (en) | 2022-12-12 | 2022-12-12 | Remote control loader hydraulic system and remote control loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115977195A (en) |
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2022
- 2022-12-12 CN CN202211590762.2A patent/CN115977195A/en active Pending
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