CN105650044A - Emergency braking system for harvester and braking method thereof - Google Patents
Emergency braking system for harvester and braking method thereof Download PDFInfo
- Publication number
- CN105650044A CN105650044A CN201610146821.5A CN201610146821A CN105650044A CN 105650044 A CN105650044 A CN 105650044A CN 201610146821 A CN201610146821 A CN 201610146821A CN 105650044 A CN105650044 A CN 105650044A
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- China
- Prior art keywords
- hydraulic pump
- oil
- electromagnetic valve
- way electromagnetic
- oil circuit
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
The invention discloses an emergency braking system for a harvester. The emergency braking system for the harvester comprises a hydraulic pump. The hydraulic pump is connected with an oil supplementing pump, and an inclined disc of the hydraulic pump is connected with a hydraulic pump servo cylinder. The oil supplementing pump is connected with an oil inlet of a hydraulic pump servo proportion valve through an oil path. An oil tank is connected with an oil outlet of the hydraulic pump servo proportion valve through an oil path. A first cavity of the hydraulic cylinder servo cylinder is connected with a first work oil port of the hydraulic pump servo proportion valve through a third oil path, and a second cavity of the hydraulic cylinder servo cylinder is connected with a second work oil port of the hydraulic pump servo proportion valve through a fourth oil path. The emergency braking system further comprises a two-position two-way electromagnetic valve, a work oil port of the two-position two-way electromagnetic valve is connected with the first cavity of the hydraulic pump servo cylinder through a first oil path, a work oil port on the opposite side of the two-position two-way electromagnetic valve is connected with the second cavity of the hydraulic pump servo cylinder through a second oil path, and the two-position two-way electromagnetic valve is electrically connected with an electric control system. The emergency braking system guarantees that the harvester can still be reliably braked and automatically controlled when the harvester has a circuit fault, so that the operation safety of the harvester is improved.
Description
Technical field
The present invention relates to mechanical braking system technical field, particularly relate to a kind of cropper emergency braking system.
Meanwhile, the invention also discloses a kind of cropper brake hard method.
Background technology
Harvest machinery is requisite equipment in agricultural production, it can be divided into towed equipment two kinds of with self-propelled, wherein self-propelled equipment relies on the electromotor being contained in equipment basis to provide power, and self-propelled cropper is divided into again traditional mechanical formula type of drive and hydrostatic drive mode according to the difference of hoofing part mode.
The running part of existing hydrostatic drive cropper is mainly made up of parts such as electromotor, hydraulic pump, hydraulic motor, electromagnetic valve, transmission case, drive axles, hydrostatic drive cropper is provided power by electromotor, hydraulic pump is driven afterwards again through belt pulley or gear-box, hydraulic pump is connected with hydraulic motor by pipeline, hydraulic motor drives cropper to complete the actions such as advance, retrogressing, turning by change speed gear box, the size in direction and angle by changing hydraulic pump swash plate, thus it is possible to vary the direct of travel of equipment and the size of gait of march. When cropper needs to stop, by stepping on service brake while realizing brake block braking by making in hydraulic pressure blowback to the normally closed solenoid valve energising being connected in hydraulic pump servoBcylinder two ends, it is achieved braking.
And above-mentioned hydrostatic pressure system is in operation and there is following problem, owing to making in hydraulic pressure blowback by being energized to the normally closed solenoid valve being connected in hydraulic pump servoBcylinder two ends when needing to brake, realize braking, if once circuit comes in contact the faults such as bad, this electromagnetic valve cannot obtain electric, during hydraulic pump swash plate just cannot return, hydraulic pump continues to put out power, although there being brake block to brake, but owing to hydraulic pump exports the power brake force more than brake block, car braking cannot be realized, there is very big potential safety hazard.
Summary of the invention
The technical problem to be solved is: provide a kind of cropper emergency braking system automatically controlled and reliably brake.
For solving above-mentioned technical problem, the technical scheme is that a kind of cropper emergency braking system, including by the engine-driven hydraulic pump of cropper, described hydraulic pump connects slippage pump, the swash plate of described hydraulic pump is connected with hydraulic pump servoBcylinder, described slippage pump is connected with the oil-in of hydraulic pump servo proportion by oil circuit, fuel tank is connected with the oil-out of described hydraulic pump servo proportion by oil circuit, first chamber of described hydraulic pump servoBcylinder is connected with the first actuator port of described hydraulic pump servo proportion by the 3rd oil circuit, second chamber of described hydraulic pump servoBcylinder is connected with the second actuator port of described hydraulic pump servo proportion by the 4th oil circuit, also include 2/2-way electromagnetic valve, the actuator port of described 2/2-way electromagnetic valve is connected with the first chamber of described hydraulic pump servoBcylinder by the first oil circuit, the actuator port of described 2/2-way electromagnetic valve opposite side is connected with the second chamber of described hydraulic pump servoBcylinder by the second oil circuit,
Described 2/2-way electromagnetic valve electrically connects with the electric-control system of cropper.
As improving further, described hydraulic pump servo proportion is mechanical hydraulic servo proportioning valve.
Conceive as same technology, the invention also discloses a kind of cropper brake hard method, the enforcement step including as described below:
When a, cropper need to brake, step on the devices such as pedal, electric-control system obtains signal and signal passes to 2/2-way electromagnetic valve, and 2/2-way electromagnetic valve obtains signal and makes 2/2-way electromagnetic valve power-off, now 2/2-way electromagnetic valve connection position in a state of nature;
B, it is in two actuator ports connection of the 2/2-way electromagnetic valve connecting position, so that the first oil circuit and the second oil communication;
After c, the first oil circuit and the second oil communication so that the 3rd oil circuit and the 4th oil circuit also connect;
After d, the 3rd oil circuit and the 4th oil communication, the first chamber making hydraulic pump servoBcylinder also connects with the second chamber, the first chamber after connection and the second chamber finally make the pressure of two intracavity equal, so that the swash plate of hydraulic pump returns to middle position, power oil cannot be obtained, thus realizing the braking of cropper by the hydraulic motor of hydraulic pump drive.
Have employed above technical scheme, beneficial effects of the present invention:
Owing to also including 2/2-way electromagnetic valve, the actuator port of described 2/2-way electromagnetic valve is connected with the first chamber of described hydraulic pump servoBcylinder by the first oil circuit, the actuator port of described 2/2-way electromagnetic valve opposite side is connected with the second chamber of described hydraulic pump servoBcylinder by the second oil circuit, described 2/2-way electromagnetic valve electrically connects with the electric-control system of cropper, hydraulic pump servoBcylinder controls to be connected with 2/2-way electromagnetic valve, so when cropper needs to brake, the devices such as the pedal that can step on cropper, make 2/2-way electromagnetic valve power-off, the 2/2-way electromagnetic valve of power-off is in its connection position, now just the 3rd oil circuit and the 4th oil circuit that connect hydraulic pump servoBcylinder can be passed through the first oil circuit and the second oil communication, so that the first chamber of hydraulic pump servoBcylinder connects with the second chamber, two cavity pressures making hydraulic pump servoBcylinder are equal, thus the swash plate of hydraulic pump that band is dynamically connected returns to middle position, realize the braking of harvest machinery, during braking, connection position it is in the power-off state because of 2/2-way electromagnetic valve, can ensure that the reliable braking of cropper, in the energized state, it is in open position, it is ensured that the normal operation of harvest machinery, the electromagnetic valve solving tradition use must be in the energized state, the problem that could realize braking, it is to avoid harvest machinery occurs that wiring circuit contact is bad, causes the electromagnetic valve not to be energized and occurs completing the unsafe condition of braking.
Accompanying drawing explanation
Fig. 1 is the present invention status architecture schematic diagram when cropper runs;
Fig. 2 is the present invention status architecture schematic diagram when cropper is braked;
In figure: 1, hydraulic pump, 2, slippage pump, 3, hydraulic pump servo proportion, 4,2/2-way electromagnetic valve, the 5, first oil circuit, the 6, second oil circuit, 7, the 3rd oil circuit, the 8, the 4th oil circuit, 9, hydraulic pump servoBcylinder, 90, the first chamber, 91, the second chamber, 10, electromotor, 11, hydraulic motor, 12, transmission case, 13, drive axle.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figures 1 and 2, the cropper emergency braking system of the embodiment of the present invention, including the hydraulic pump 1 linked together and slippage pump 2, hydraulic pump 1 and slippage pump 2 are driven by the electromotor 10 of cropper, the swash plate of hydraulic pump 1 is connected with hydraulic pump servoBcylinder 9, slippage pump 2 is connected with the oil-in of hydraulic pump servo proportion 3 by oil circuit, and fuel tank is connected with the oil-out of hydraulic pump servo proportion 3 by oil circuit.
First chamber 90 of hydraulic pump servoBcylinder 9 is connected with the first actuator port of hydraulic pump servo proportion 3 by the 3rd oil circuit 7, and the second chamber 91 of hydraulic pump servoBcylinder 9 is connected with the second actuator port of hydraulic pump servo proportion 3 by the 4th oil circuit 8.
Also include 2/2-way electromagnetic valve 4, the actuator port of 2/2-way electromagnetic valve 4 is connected with the first chamber 90 of hydraulic pump servoBcylinder 9 by the first oil circuit 5, and the actuator port of 2/2-way electromagnetic valve 4 opposite side is connected with the second chamber of hydraulic pump servoBcylinder 9 by the second oil circuit 6.
2/2-way electromagnetic valve 4 electrically connects with the electric-control system (not shown) of cropper.
Hydraulic pump servo proportion 3 is mechanical hydraulic servo proportioning valve.
The both sides hydraulic fluid port of hydraulic pump 1 connects hydraulic motor 11 by oil circuit, and hydraulic motor 11 connects the drive axle 13 of cropper by transmission case 12.
The cropper emergency braking system operation principle that details are provided below of the embodiment of the present invention.
Meanwhile, a kind of cropper brake hard method is also disclosed, the enforcement step including as described below:
When a, cropper need to brake, step on the devices such as pedal, electric-control system obtains signal and signal passes to 2/2-way electromagnetic valve 4, and 2/2-way electromagnetic valve 4 obtains signal and makes 2/2-way electromagnetic valve 4 power-off, now 2/2-way electromagnetic valve 4 connection position in a state of nature;
B, it is in two actuator ports connection of the 2/2-way electromagnetic valve 4 connecting position, so that the first oil circuit 5 connects with the second oil circuit 6;
After c, the first oil circuit 5 connect with the second oil circuit 6 so that the 3rd oil circuit 7 also connects with the 4th oil circuit 8;
After d, the 3rd oil circuit 7 connect with the 4th oil circuit 8, the first chamber 90 making hydraulic pump servoBcylinder 9 also connects with the second chamber 91, the first chamber 90 after connection and the second chamber 91 finally make the pressure of two intracavity equal, thus driving the swash plate of the hydraulic pump 1 being connected with the cylinder rod of hydraulic pump servoBcylinder 9 to return to middle position, power oil cannot be obtained, thus realizing the braking of cropper by the hydraulic motor of hydraulic pump drive.
Understand for the ease of entirety, specific works principle is: as shown in Figure 1, during cropper walking, hydraulic system is provided power drive hydraulic pump 1 and slippage pump 2 by electromotor 10, when driver drives hydraulic pump servo proportion 3 by manipulation device, as shown in fig. 1, illustrate when being in left position for hydraulic pump servo proportion 3, when hydraulic pump servo proportion 3 is in left position, now owing to manipulation device leaves middle position, by electric-control system, electric signal issued 2/2-way electromagnetic valve 4, 2/2-way electromagnetic valve 4 is made to obtain electric thus disconnecting the control oil at hydraulic pump servoBcylinder 9 two ends, namely the 3rd oil circuit 7 is made not connect with the 4th oil circuit 8, the pressure oil that now slippage pump 2 provides enters the first chamber of hydraulic pump servoBcylinder 9 by the left position of hydraulic pump servo proportion 3, and then control hydraulic pump swash plate generation deviation angle, make the flow that hydraulic pump output is proportional to manipulation device position, this flow is transferred to hydraulic motor 11, hydraulic motor 11 drives equipment transmission case 12, transmission case 12 drives the drive axle 13 of cropper by being mechanically connected, and then drive cropper to advance or retreat.
When equipment is prepared to stop, the signal making 2/2-way electromagnetic valve 4 by stepping on the devices such as pedal disconnects, the 2/2-way electromagnetic valve 4 being in off-position resets to original connection position state, now 2/2-way electromagnetic valve 4 is in position as shown in Figure 2, and then make hydraulic pump servoBcylinder 9 two ends control oil connection, namely the 3rd oil circuit 7 and the 4th oil circuit 8 by the first oil circuit 5,2/2-way electromagnetic valve 4 connect position and the second oil circuit 6 realizes connection, in making hydraulic pump swash plate return after connection, thus realizing cropper hydraulic braking.
Cropper is when occurring wiring circuit contact bad to utilize this emergency braking system can ensure that, cropper is now made to be under off-position, under off-position, the 2/2-way electromagnetic valve of this emergency braking system automatically resets to connection position under spring force, hydraulic pump is driven to return to middle position thereby through hydraulic pump servoBcylinder, cropper is braked, solve existing cropper and need just can complete in the energized state the problem of braking, thus avoiding the generation of security incident.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (3)
1. cropper emergency braking system, including by the engine-driven hydraulic pump of cropper, described hydraulic pump connects slippage pump, the swash plate of described hydraulic pump is connected with hydraulic pump servoBcylinder, described slippage pump is connected with the oil-in of hydraulic pump servo proportion by oil circuit, fuel tank is connected with the oil-out of described hydraulic pump servo proportion by oil circuit, first chamber of described hydraulic pump servoBcylinder is connected with the first actuator port of described hydraulic pump servo proportion by the 3rd oil circuit, second chamber of described hydraulic pump servoBcylinder is connected with the second actuator port of described hydraulic pump servo proportion by the 4th oil circuit, it is characterized in that, also include 2/2-way electromagnetic valve, the actuator port of described 2/2-way electromagnetic valve is connected with the first chamber of described hydraulic pump servoBcylinder by the first oil circuit, the actuator port of described 2/2-way electromagnetic valve opposite side is connected with the second chamber of described hydraulic pump servoBcylinder by the second oil circuit,
Described 2/2-way electromagnetic valve electrically connects with the electric-control system of cropper.
2. cropper emergency braking system according to claim 1, it is characterised in that described hydraulic pump servo proportion is mechanical hydraulic servo proportioning valve.
3. cropper brake hard method, it is characterised in that include enforcement step as described below:
When a, cropper need to brake, step on the devices such as pedal, electric-control system obtains signal and signal passes to 2/2-way electromagnetic valve, and 2/2-way electromagnetic valve obtains signal and makes 2/2-way electromagnetic valve power-off, now 2/2-way electromagnetic valve connection position in a state of nature;
B, it is in two actuator ports connection of the 2/2-way electromagnetic valve connecting position, so that the first oil circuit and the second oil communication;
After c, the first oil circuit and the second oil communication so that the 3rd oil circuit and the 4th oil circuit also connect;
After d, the 3rd oil circuit and the 4th oil communication, the first chamber making hydraulic pump servoBcylinder also connects with the second chamber, the first chamber after connection and the second chamber finally make the pressure of two intracavity equal, so that the swash plate of hydraulic pump returns to middle position, power oil cannot be obtained, thus realizing the braking of cropper by the hydraulic motor of hydraulic pump drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610146821.5A CN105650044A (en) | 2016-03-15 | 2016-03-15 | Emergency braking system for harvester and braking method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610146821.5A CN105650044A (en) | 2016-03-15 | 2016-03-15 | Emergency braking system for harvester and braking method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105650044A true CN105650044A (en) | 2016-06-08 |
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ID=56493679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610146821.5A Pending CN105650044A (en) | 2016-03-15 | 2016-03-15 | Emergency braking system for harvester and braking method thereof |
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| Country | Link |
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| CN (1) | CN105650044A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110816697A (en) * | 2019-10-08 | 2020-02-21 | 长沙桑铼特农业机械设备有限公司 | Crawler vehicle carrying electric control integrated pump motor driving system and driving control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130202452A1 (en) * | 2010-03-30 | 2013-08-08 | Robert Bosch Gmbh | Hydraulic fan drive |
| CN203543926U (en) * | 2013-06-24 | 2014-04-16 | 青岛科瑞特机电集团有限公司 | Electric-hydraulic brake control device |
| CN104863912A (en) * | 2014-11-06 | 2015-08-26 | 山东泰安煤矿机械有限公司 | Liquid control system for buddle jig |
| CN104879349A (en) * | 2015-04-13 | 2015-09-02 | 徐州重型机械有限公司 | Hydraulic system for energy recovery and utilization and engineering machinery vehicle |
| CN205423360U (en) * | 2016-03-15 | 2016-08-03 | 雷沃重工股份有限公司 | Emergency braking system for harvester |
-
2016
- 2016-03-15 CN CN201610146821.5A patent/CN105650044A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130202452A1 (en) * | 2010-03-30 | 2013-08-08 | Robert Bosch Gmbh | Hydraulic fan drive |
| CN203543926U (en) * | 2013-06-24 | 2014-04-16 | 青岛科瑞特机电集团有限公司 | Electric-hydraulic brake control device |
| CN104863912A (en) * | 2014-11-06 | 2015-08-26 | 山东泰安煤矿机械有限公司 | Liquid control system for buddle jig |
| CN104879349A (en) * | 2015-04-13 | 2015-09-02 | 徐州重型机械有限公司 | Hydraulic system for energy recovery and utilization and engineering machinery vehicle |
| CN205423360U (en) * | 2016-03-15 | 2016-08-03 | 雷沃重工股份有限公司 | Emergency braking system for harvester |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110816697A (en) * | 2019-10-08 | 2020-02-21 | 长沙桑铼特农业机械设备有限公司 | Crawler vehicle carrying electric control integrated pump motor driving system and driving control method |
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| PB01 | Publication | ||
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Application publication date: 20160608 |
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| RJ01 | Rejection of invention patent application after publication |