CN211848811U - Milling machine walking parking braking electrohydraulic control system - Google Patents
Milling machine walking parking braking electrohydraulic control system Download PDFInfo
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- CN211848811U CN211848811U CN202020178741.XU CN202020178741U CN211848811U CN 211848811 U CN211848811 U CN 211848811U CN 202020178741 U CN202020178741 U CN 202020178741U CN 211848811 U CN211848811 U CN 211848811U
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Abstract
The utility model discloses a milling machine walking parking braking electrohydraulic control system, which comprises a display, a controller, a pressure sensor, a walking pump electric servo valve, a first electromagnetic reversing valve and a second electromagnetic reversing valve; the input end of the controller is respectively connected with the pressure sensor and the electric servo valves a and b of the walking pump, the output end of the controller is respectively connected with the first electromagnetic directional valve Y2 and the second electromagnetic directional valve Y1, and the communication end of the controller is connected with the display; the controller reads and analyzes pressure signals acquired by the pressure sensor and current signals of the walking pump electric servo valves a and b, feeds the pressure signals back to the display, and finally controls the first electromagnetic directional valve and the second electromagnetic directional valve to act; the electro-hydraulic control system can not only realize the recovery of the traveling parking brake and the release of the parking brake of the milling machine, but also prevent the milling machine from working for a long time in a semi-braking state and influencing the service life of elements such as a speed reducer.
Description
Technical Field
The utility model relates to a milling machine electricity liquid control technical field specifically is a milling machine walking parking braking electricity liquid control system.
Background
The milling machine is indispensable as a walking machine and a reliable braking system. The existing milling machines in the market realize parking braking through built-in brakes of speed reducers, and the traditional control mode can only realize parking braking and parking braking release through a single loop, so that on one hand, when the loop fails, the milling machines cannot realize parking braking or parking braking release, if the parking braking cannot be realized, great potential safety hazards exist, and if the parking braking release cannot be realized, the milling machines cannot drive or trailer, so that the construction progress is influenced; on the other hand, if the milling machine works in a semi-braking state for a long time, the milling machine is not easy to be detected by an operator, the service life of elements such as a speed reducer is influenced, and personal and property safety can be endangered.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a milling machine walking parking braking electricity liquid control system to traditional control mode can only realize parking braking and parking braking through single return circuit and remove among the solution prior art, when this return circuit became invalid, will lead to the unable problem that realizes parking braking or parking braking and remove of milling machine.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a milling machine walking parking braking electrohydraulic control system, which comprises a display, a controller, a pressure sensor, a walking pump electric servo valve, a first electromagnetic reversing valve and a second electromagnetic reversing valve;
the input end of the controller is respectively connected with the pressure sensor and the electric servo valves a and b of the walking pump, the output end of the controller is respectively connected with the first electromagnetic directional valve Y2 and the second electromagnetic directional valve Y1, and the communication end of the controller is connected with the display; the first electromagnetic directional valve is connected with the second electromagnetic directional valve;
the controller reads and analyzes pressure signals acquired by the pressure sensor and current signals of the traveling pump electric servo valves a and b, feeds the pressure signals back to the display, and finally controls the first electromagnetic directional valve and the second electromagnetic directional valve to act, so that the traveling parking brake recovery and parking brake release of the milling machine are realized.
Furthermore, the electro-hydraulic control system further comprises a walking speed reducer brake, the walking speed reducer brake is connected with a pressure sensor, and the pressure sensor collects pressure signals of pressure oil entering the walking speed reducer brake.
Furthermore, the electro-hydraulic control system also comprises a manual reversing valve, a constant pressure oil source and a hydraulic oil tank; one end of the first electromagnetic reversing valve is respectively connected with the constant-pressure oil source and the hydraulic oil tank, and the other end of the first electromagnetic reversing valve is connected with the walking speed reducer brake through the manual reversing valve; one end of the manual reversing valve is connected with the hydraulic oil tank, and the other end of the manual reversing valve is connected with the constant-pressure oil source.
Furthermore, one end of a second electromagnetic reversing valve is connected with the hydraulic oil tank, and the other end of the second electromagnetic reversing valve is connected with a brake of the walking speed reducer through a manual reversing valve.
Furthermore, the electro-hydraulic control system also comprises a hand pump, wherein one end of the hand pump is connected with the hydraulic oil tank, and the other end of the hand pump is respectively connected with the pressure sensor, the manual reversing valve and the walking speed reducer brake.
Furthermore, the electro-hydraulic control system also comprises an overflow valve, wherein one end of the overflow valve is respectively connected with the hand pump, the pressure sensor, the walking speed reducer brake and the manual reversing valve, and the other end of the overflow valve is connected with the hydraulic oil tank.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a milling machine walking parking braking electrohydraulic control system, which comprises a display, a controller, a pressure sensor, a walking pump electric servo valve, a first electromagnetic reversing valve and a second electromagnetic reversing valve; the input end of the controller is respectively connected with the pressure sensor and the electric servo valves a and b of the walking pump, the output end of the controller is respectively connected with the first electromagnetic directional valve Y2 and the second electromagnetic directional valve Y1, and the communication end of the controller is connected with the display; the first electromagnetic directional valve is connected with the second electromagnetic directional valve; the controller reads and analyzes pressure signals acquired by the pressure sensor and current signals of the traveling pump electric servo valves a and b, feeds the pressure signals back to the display, and finally controls the first electromagnetic directional valve and the second electromagnetic directional valve to act, so that the traveling parking brake recovery and parking brake release of the milling machine are realized.
The electro-hydraulic control system also comprises a walking speed reducer brake, wherein the walking speed reducer brake is connected with a pressure sensor, and the pressure sensor acquires a pressure signal of pressure oil entering the walking speed reducer brake; when the milling machine moves, if the pressure sensor detects that the pressure value of pressure oil entering the brake of the walking speed reducer is lower than the preset value, the pressure sensor can transmit the acquired pressure signal to the display through the controller, the display can give an alarm and remind, and at the moment, an operator needs to stop the machine immediately to check the whole system loop, so that the speed reducer is prevented from working in a semi-braking state for a long time, and the damage to elements such as the speed reducer is avoided.
The electro-hydraulic control system also comprises a manual reversing valve, a constant pressure oil source and a hydraulic oil tank; one end of the first electromagnetic reversing valve is respectively connected with the constant-pressure oil source and the hydraulic oil tank, and the other end of the first electromagnetic reversing valve is connected with the walking speed reducer brake through the manual reversing valve; one end of the manual reversing valve is connected with the hydraulic oil tank, and the other end of the manual reversing valve is connected with the constant-pressure oil source; when the milling machine needs to move, the electric servo valve of the walking pump and the first electromagnetic reversing valve are powered on, pressure oil output from the constant-pressure oil source sequentially passes through the first electromagnetic reversing valve and the manual reversing valve to enter a brake of the walking speed reducer, and parking braking is released; when the milling machine is required to stop, the first electromagnetic reversing valve is powered off, pressure oil in the traveling speed reducer brake sequentially passes through the manual reversing valve and the first electromagnetic reversing valve to return to the hydraulic oil tank, and parking braking is recovered.
One end of the second electromagnetic reversing valve is connected with the hydraulic oil tank, and the other end of the second electromagnetic reversing valve is connected with a brake of the walking speed reducer through a manual reversing valve; when the milling machine is required to stop, the electric servo valve of the walking pump is de-energized, if the first electromagnetic directional valve is blocked, the pressure oil in the brake of the walking speed reducer cannot return to the hydraulic oil tank through the first electromagnetic directional valve, at the moment, the second electromagnetic directional valve is required to be energized, the pressure oil in the walking speed reducer returns to the hydraulic oil tank through the manual directional valve and the second electromagnetic directional valve in sequence, and the parking brake is recovered.
The electro-hydraulic control system also comprises a hand pump, wherein one end of the hand pump is connected with the hydraulic oil tank, and the other end of the hand pump is respectively connected with the pressure sensor, the manual reversing valve and the walking speed reducer brake; when the milling machine needs to move and the constant-pressure oil source fails at the moment and pressure oil cannot be supplied, under the condition, the manual reversing valve can be controlled to be closed, the pressure oil is supplied by the hand pump to enter the traveling speed reducer brake, and the parking brake is released; when the milling machine is required to stop, the manual reversing valve is opened, pressure oil in the traveling speed reducer brake sequentially passes through the manual reversing valve and the first electromagnetic reversing valve to return to the hydraulic oil tank, and parking braking is recovered.
The electro-hydraulic control system also comprises an overflow valve, wherein one end of the overflow valve is respectively connected with the hand pump, the pressure sensor, the walking speed reducer brake and the manual reversing valve, and the other end of the overflow valve is connected with the hydraulic oil tank; and redundant pressure oil returns to the hydraulic oil tank through an overflow valve so as to prevent elements such as a brake of the walking speed reducer and the like from being damaged due to overpressure.
Drawings
Fig. 1 is a working principle diagram of a milling machine walking parking braking electro-hydraulic control system provided by the embodiment of the utility model.
In the figure: 1-display, 2-controller, 3-pressure sensor, 4-walking speed reducer brake, 5-overflow valve, 6-manual reversing valve, 7-first electromagnetic reversing valve, 8-second electromagnetic reversing valve, 9-constant pressure oil source, 10-hydraulic oil tank, 11-hand pump and 12-walking pump electric servo valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, which is a schematic diagram of an electro-hydraulic control system for a milling machine traveling parking brake provided by an embodiment of the present invention, the electro-hydraulic control system includes a display 1, a controller 2, a pressure sensor 3, a traveling pump electric servo valve 12, a first electromagnetic directional valve 7, and a second electromagnetic directional valve 8; the input end of the controller 2 is respectively connected with the pressure sensor 3 and the electric servo valves 12a and b of the walking pump, the output end of the controller 2 is respectively connected with the first electromagnetic directional valve 7Y2 and the second electromagnetic directional valve 8Y1, and the communication end of the controller 2 is connected with the display 1; the first electromagnetic directional valve 7 is connected with the second electromagnetic directional valve 8; the controller 2 reads and analyzes the pressure signal acquired by the pressure sensor 3 and the current signals of the traveling pump electric servo valves 12a and b, feeds the pressure signal back to the display 1, and finally controls the first electromagnetic directional valve 7 and the second electromagnetic directional valve 8 to act, so that the traveling parking brake recovery and parking brake release of the milling machine are realized.
The electro-hydraulic control system further comprises a walking speed reducer brake 4, the walking speed reducer brake 4 is connected with the pressure sensor 3, and the pressure sensor 3 collects pressure signals of pressure oil entering the walking speed reducer brake 4.
The electro-hydraulic control system also comprises a manual reversing valve 6, a constant pressure oil source 9 and a hydraulic oil tank 10; one end of a first electromagnetic directional valve 7 is respectively connected with a constant pressure oil source 9 and a hydraulic oil tank 10, and the other end of the first electromagnetic directional valve is connected with a walking speed reducer brake 4 through a manual directional valve 6; one end of the manual reversing valve 6 is connected with a hydraulic oil tank 10, and the other end is connected with a constant pressure oil source 9.
One end of a second electromagnetic directional valve 8 is connected with a hydraulic oil tank 10, and the other end of the second electromagnetic directional valve is connected with a walking speed reducer brake 4 through a manual directional valve 6.
The electro-hydraulic control system also comprises a hand pump 11, wherein one end of the hand pump 11 is connected with a hydraulic oil tank 10, and the other end of the hand pump 11 is respectively connected with the pressure sensor 3, the manual reversing valve 6 and the walking speed reducer brake 4.
The electro-hydraulic control system further comprises an overflow valve 5, one end of the overflow valve 5 is connected with the hand pump 11, the pressure sensor 3, the walking speed reducer brake 4 and the manual reversing valve 6 respectively, and the other end of the overflow valve is connected with the hydraulic oil tank 10.
When the milling machine needs to move forward or backward, the walking pump electric servo valves 12a and b are powered on, meanwhile, the pressure sensor 3 transmits the acquired pressure signal to the controller 2, the controller 2 sends out an instruction to control the first electromagnetic reversing valve 7Y2 to be powered on, pressure oil output from the constant pressure oil source 9 sequentially passes through the first electromagnetic reversing valve 7 and the manual reversing valve 6 to enter the walking speed reducer brake 4, and parking braking is released; when the milling machine needs to be stopped, the electric servo valve 12 of the walking pump is powered off, meanwhile, the pressure sensor 3 transmits the acquired pressure signal to the controller 2, the controller 2 sends out an instruction to control the first electromagnetic reversing valve 7Y2 to be powered off, pressure oil in the brake 4 of the walking speed reducer returns to the hydraulic oil tank 10 through the manual reversing valve 6 and the first electromagnetic reversing valve 7 in sequence, and parking braking is recovered.
In the process, the pressure sensor 3 monitors the pressure of the pressure oil in the brake 4 of the walking speed reducer in real time and transmits the acquired pressure signal to the controller 2, if the milling machine needs to be stopped, after the walking pump electric servo valve 12 is powered off, when the pressure sensor 3 monitors that the pressure value of the pressure oil in the brake 4 of the walking speed reducer is higher than a preset pressure value required by brake release of the pressure oil, the controller 2 judges that the first electromagnetic directional valve 7 fails and sends an instruction to control the second electromagnetic directional valve 8Y1 to be powered on, the pressure oil in the brake 4 of the walking speed reducer returns to the hydraulic oil tank 10 through the manual directional valve 6 and the second electromagnetic directional valve 8 in sequence, and parking brake is recovered; if the milling machine is in the state of traveling, walking pump electricity servo valve 12 gets electric, at this moment, if pressure sensor 3 monitors when the pressure value that gets into pressure oil in walking speed reducer stopper 4 is less than the pressure default, pressure sensor 3 can transmit the pressure signal who gathers to display 1 through controller 2, alarm warning can appear in display 1, and operating personnel need shut down immediately this moment, examines whole system loop, prevents that the speed reducer from working under the half braking state for a long time, causes the damage of components such as speed reducer.
When the constant pressure oil source 9 fails and cannot provide pressure oil, if the milling machine needs to move, the manual reversing valve 6 can be controlled to be closed, the pressure oil is provided by the hand pump 11 to enter the traveling speed reducer brake 4, and the parking brake is released; the redundant pressure oil returns to the hydraulic oil tank 10 through the overflow valve 5 so as to prevent elements such as a brake 4 of the walking speed reducer from being damaged due to overpressure; if the milling machine needs to be stopped, the manual reversing valve 6 is opened, pressure oil in the traveling speed reducer brake 4 sequentially passes through the manual reversing valve 6 and the first electromagnetic reversing valve 7 to return to the hydraulic oil tank 10, and parking braking is recovered.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a milling machine walking parking braking electric hydraulic control system which characterized in that: the device comprises a display (1), a controller (2), a pressure sensor (3), a walking pump electric servo valve (12), a first electromagnetic directional valve (7) and a second electromagnetic directional valve (8);
the input end of the controller (2) is respectively connected with the pressure sensor (3) and the electric servo valves (12) a and b of the walking pump, the output end of the controller (2) is respectively connected with the first electromagnetic directional valve (7) Y2 and the second electromagnetic directional valve (8) Y1, and the communication end of the controller (2) is connected with the display (1); the first electromagnetic directional valve (7) is connected with the second electromagnetic directional valve (8);
the controller (2) reads and analyzes pressure signals collected by the pressure sensor (3) and current signals of the traveling pump electric servo valves (12) a and b, feeds the pressure signals back to the display (1), and finally controls the first electromagnetic directional valve (7) and the second electromagnetic directional valve (8) to act so as to realize the traveling parking brake recovery and parking brake release of the milling machine.
2. The milling machine walking parking braking electrohydraulic control system of claim 1, wherein: the oil pressure sensor is characterized by further comprising a walking speed reducer brake (4), wherein the walking speed reducer brake (4) is connected with the pressure sensor (3), and the pressure sensor (3) collects pressure signals of pressure oil entering the walking speed reducer brake (4).
3. The milling machine walking parking braking electro-hydraulic control system of claim 2, wherein: the hydraulic control system also comprises a manual reversing valve (6), a constant pressure oil source (9) and a hydraulic oil tank (10); one end of the first electromagnetic directional valve (7) is respectively connected with a constant pressure oil source (9) and a hydraulic oil tank (10), and the other end of the first electromagnetic directional valve is connected with a walking speed reducer brake (4) through a manual directional valve (6); one end of the manual reversing valve (6) is connected with the hydraulic oil tank (10), and the other end of the manual reversing valve is connected with the constant-pressure oil source (9).
4. The milling machine walking parking braking electro-hydraulic control system of claim 3, wherein: one end of the second electromagnetic directional valve (8) is connected with the hydraulic oil tank (10), and the other end of the second electromagnetic directional valve is connected with the walking speed reducer brake (4) through the manual directional valve (6).
5. The milling machine walking parking braking electro-hydraulic control system of claim 3, wherein: the hydraulic control system is characterized by further comprising a hand pump (11), wherein one end of the hand pump (11) is connected with the hydraulic oil tank (10), and the other end of the hand pump (11) is connected with the pressure sensor (3), the manual reversing valve (6) and the walking speed reducer brake (4) respectively.
6. The milling machine walking parking braking electro-hydraulic control system of claim 5, wherein: the hydraulic control system is characterized by further comprising an overflow valve (5), wherein one end of the overflow valve (5) is connected with the hand pump (11), the pressure sensor (3), the walking speed reducer brake (4) and the manual reversing valve (6) respectively, and the other end of the overflow valve (5) is connected with the hydraulic oil tank (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020178741.XU CN211848811U (en) | 2020-02-18 | 2020-02-18 | Milling machine walking parking braking electrohydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020178741.XU CN211848811U (en) | 2020-02-18 | 2020-02-18 | Milling machine walking parking braking electrohydraulic control system |
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| Publication Number | Publication Date |
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| CN211848811U true CN211848811U (en) | 2020-11-03 |
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| CN202020178741.XU Active CN211848811U (en) | 2020-02-18 | 2020-02-18 | Milling machine walking parking braking electrohydraulic control system |
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- 2020-02-18 CN CN202020178741.XU patent/CN211848811U/en active Active
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| CP02 | Change in the address of a patent holder |
Address after: 221004 No.10 tuolanshan Road, Xuzhou Economic and Technological Development Zone, Xuzhou City, Jiangsu Province Patentee after: XUZHOU XUGONG ROAD-CONSTRUCTION MACHINERY Co.,Ltd. Address before: 221004 No. 10, Mount Blue Road, Xuzhou Economic Development Zone, Jiangsu, China Patentee before: XUZHOU XUGONG ROAD-CONSTRUCTION MACHINERY Co.,Ltd. |