CN108394395B - Brake valve block assembly for tractor - Google Patents
Brake valve block assembly for tractor Download PDFInfo
- Publication number
- CN108394395B CN108394395B CN201810364942.6A CN201810364942A CN108394395B CN 108394395 B CN108394395 B CN 108394395B CN 201810364942 A CN201810364942 A CN 201810364942A CN 108394395 B CN108394395 B CN 108394395B
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- Prior art keywords
- oil
- valve body
- brake valve
- automatic
- brake
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- 239000003921 oil Substances 0.000 abstract description 74
- 239000010720 hydraulic oil Substances 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/025—Electrically controlled valves
- B60T15/028—Electrically controlled valves in hydraulic systems
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Regulating Braking Force (AREA)
Abstract
A brake valve block assembly for a tractor comprising: three electromagnetic directional valves, an automatic braking valve body and a pipe joint with an orifice; the pipe joint with the throttle hole is arranged at the lower side of the valve body of the automatic braking valve, the first electromagnetic directional valve is connected with the pipe joint with the throttle hole, and the second electromagnetic directional valve and the third electromagnetic directional valve are arranged at the right side of the valve body of the automatic braking valve in parallel; the automatic brake valve body is provided with six connecting oil ports, wherein a third oil inlet, a fourth oil inlet, a first oil outlet and a second oil outlet are arranged on the automatic brake valve body, a second oil inlet is arranged on the lower side surface of the automatic brake valve body, and a pressure measuring oil port is arranged on the left side surface of the automatic brake valve body. The brake valve block assembly not only reserves the pedal operation braking function, but also can realize the electric control operation automatic braking by adopting the hydraulic oil controlled by electric control, thereby meeting the conventional use requirement of the tractor, further increasing the use function and improving the operation efficiency.
Description
Technical Field
The invention belongs to the field of tractors, and relates to a valve block assembly, in particular to a brake valve block assembly for a tractor.
Background
At present, on an unmanned wheeled tractor, most of the braking systems of the tractor adopt a mechanical control hydraulic power-assisted braking system, and the mechanical control hydraulic power-assisted braking system mainly comprises a braking pump, a running brake, a braking oil tank, a control pedal and a pipeline. Because the system can not realize automatic control, when the tractor needs to be braked, a driver is required to press a running brake control pedal to realize manual braking, thereby influencing the operation efficiency, increasing the labor cost and the time cost, and simultaneously increasing the labor intensity and the accident rate of the driver.
For automatic driving devices used in other fields similar to tractors, such as automobiles, construction machines, etc., although automatic control of braking can be achieved, there are some problems. For example, the patent of the utility model "an automatic brake valve for automobile brake", application number: 201220265630.8, although braking operations of different strengths can be achieved, the following problems still remain: firstly, the structure is complex, the ejector rod is in sliding fit with the upper cover, the intermediate body and the large shell, and the requirements on the machining precision and the assembly precision are high; secondly, the pneumatic transmission is used, and an independent air source is required, so that the use cost is increased; thirdly, the brake is not suitable for products such as a tractor, and the like, because the tractor not only needs unilateral wheel braking, but also can brake simultaneously, and meanwhile, the braking mode of original foot braking is reserved. The utility model patent application 'intelligent tractor' published by the national intellectual property agency on the 2015, 06 and 03 days has the application number: 201410773044.8, wherein include an automatic brake device, adopt the original brake mechanism of PLC control cylinder pulling tractor, realize automatic brake, this scheme simple structure easily realizes. There are several problems: first, there are the second, third of the above-mentioned problem in "a kind of car brake automatic brake valve"; secondly, the cylinder is used for directly pulling the braking device, so that the braking force is not easy to control, and the risk of sudden stop or braking weakness is caused.
Therefore, it is necessary to design a brake valve block assembly for a tractor, and introduce hydraulic oil capable of being controlled electrically to realize electrically controlled automatic braking while maintaining a mechanically controlled braking function. The tractor not only meets the conventional use of the tractor, but also meets the use requirement of the unmanned tractor, further simplifies the operation mode, reduces the labor intensity of operators, saves the time of users and improves the working efficiency.
Disclosure of Invention
The invention aims to provide the brake valve block assembly for the tractor, which has the advantages of compact structure, simple and convenient operation and reliable use, and meets the automatic braking requirement of the unmanned tractor while not affecting the normal driving braking requirement through reasonable combination and irregular use of a two-position three-way electromagnetic reversing valve and two-position four-way electromagnetic reversing valves.
The invention can achieve the above purpose through the following technical scheme: a brake valve block assembly for a tractor comprising: the first electromagnetic reversing valve, the automatic braking valve body, the second electromagnetic reversing valve, the third electromagnetic reversing valve and the pipe joint with the orifice; the pipe joint with the throttle hole is arranged at the lower side of the valve body of the automatic brake valve, the first electromagnetic directional valve is connected with the pipe joint with the throttle hole in the brake valve block assembly through an oil pipe, and the second electromagnetic directional valve and the third electromagnetic directional valve are arranged at the right side of the valve body of the automatic brake valve in parallel; the automatic brake valve body is provided with six connecting oil ports, wherein a third oil inlet, a fourth oil inlet, a first oil outlet and a second oil outlet are arranged on the automatic brake valve body, a second oil inlet is arranged on the lower side surface of the automatic brake valve body, and a pressure measuring oil port is arranged on the left side surface of the automatic brake valve body.
Six internal oil ports are arranged in the automatic brake valve body, wherein a fifth oil inlet, a first oil return port, a first working oil port, a sixth oil inlet, a second oil return port and a second working oil port are arranged below the automatic brake valve body.
Five flow passages are formed in the automatic brake valve body, wherein the first flow passage is communicated with the second oil inlet, the fifth oil inlet, the sixth oil inlet and the pressure measuring oil port; the second runner is communicated with the first oil return port and the third oil inlet; the third runner is communicated with the second oil return port and the fourth oil inlet; the fourth runner is communicated with the first working oil port and the first oil outlet; and the fifth runner is communicated with the second working oil port and the second oil outlet.
By adopting the technical scheme, the invention can achieve the following beneficial effects: the brake valve block assembly of the tractor is used for introducing hydraulic oil which can be controlled electrically to realize automatic braking of the tractor by controlling the pedal, so that the conventional use of the tractor is met, the use requirement of the unmanned tractor is met, the time of a user is further saved, the operation efficiency is improved, and the operation income is increased; simple structure, reliable use and easy manufacture.
Drawings
FIG. 1 is a schematic view of a brake valve block assembly for a tractor according to the present invention;
FIG. 2 is a schematic diagram showing the structural arrangement of an oil port in the valve body of an automatic brake valve in a brake valve block assembly for a tractor;
FIG. 3 is a schematic illustration of a foot pedal braking mode neutral position in a brake valve block assembly for a tractor in accordance with the present invention;
FIG. 4 is a schematic illustration of a foot pedal braking mode braking condition in a brake valve block assembly for a tractor in accordance with the present invention;
FIG. 5 is a schematic illustration of the neutral position of the electronically controlled brake mode in a brake valve block assembly for a tractor in accordance with the present invention;
fig. 6 is a schematic diagram of an electronically controlled braking mode braking condition in a tractor brake valve block assembly according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. As shown in fig. 1 to 6, a brake valve block assembly for a tractor is fixed on a right suspension of the tractor by bolts, comprising: a first electromagnetic directional valve 1, an automatic braking valve body 2, a second electromagnetic directional valve 3, a third electromagnetic directional valve 4 and a pipe joint 5 with an orifice; the pipe joint 5 with an orifice is arranged on the lower side surface of the valve body 2 of the automatic brake valve and is used for buffering the impact of hydraulic oil when the hydraulic oil enters the brake; the first electromagnetic reversing valve 1 is arranged on a power reversing valve shell of the tractor and is used for switching an electric control automatic braking mode and a pedal braking mode, and is connected with a pipe joint 5 with an orifice in a brake valve block assembly through an oil pipe; the second electromagnetic directional valve 3 and the third electromagnetic directional valve 4 are arranged on the right side of the automatic braking valve body 2 in parallel, the second electromagnetic directional valve 3 controls the combination and separation of a left brake of the tractor, and the second electromagnetic directional valve 3 is communicated with the second oil inlet P2, the first oil outlet B1 and the third oil inlet P3 respectively through a first flow passage L1, a fourth flow passage L4 and a second flow passage L2 in the automatic braking valve body 2; the third electromagnetic directional valve 4 controls the combination and separation of the right brake of the tractor, and is communicated with the second oil inlet P2, the second oil outlet B2 and the fourth oil inlet P4 respectively through a first flow passage L1, a fifth flow passage L5 and a third flow passage L3 in the valve body 2 of the automatic braking valve.
Six oil ports are respectively connected to the valve body 2 of the automatic braking valve, namely a second oil inlet P2, and are connected with the first electromagnetic directional valve 1 and the braking valve block assembly; the third oil inlet P3 is connected with a left brake pump, the fourth oil inlet P4 is connected with a right brake pump, the first oil outlet B1 is connected with a left brake, the second oil outlet B2 is connected with a right brake, and the pressure measuring oil port G1 is used for measuring system pressure. The functions of the flow channel in the valve body are as follows: the first flow passage L1 is communicated with the second oil inlet P2, the fifth oil inlet P5, the sixth oil inlet P6 and the pressure measuring oil port G and is used for providing pressure oil for the electromagnetic valve in an electric control automatic braking mode; the second flow passage L2 is communicated with the first oil return port T1 and the third oil inlet P3 and is used for conveying hydraulic oil from the left brake pump to the left brake in a pedal braking mode; the third flow passage L3 is communicated with the second oil return port T2 and the fourth oil inlet P4 and is used for conveying hydraulic oil from the right brake pump to the right brake in a pedal braking mode; the fourth runner L4 is communicated with the first working oil port B'1 and the first oil outlet B1 and is a runner for communicating the automatic brake valve assembly and the left brake; the fifth runner L5 is communicated with the second working oil port B'2 and the second oil outlet B2 and is a runner for communicating the automatic brake valve assembly and the right brake.
The brake valve block assembly for the tractor provides two braking modes: a foot pedal braking mode and an electronically controlled automatic braking mode.
In the pedal braking mode, the first electromagnetic directional valve 1, the second electromagnetic directional valve 3 and the third electromagnetic directional valve 4 are not powered, the system principle is as shown in fig. 3, hydraulic oil provided by the hydraulic pump cannot enter the brake, and the brake pump is communicated with the brake through an oil pipe and an internal flow passage of the valve body 2 of the automatic brake valve, and at the moment, the brake pump is communicated with a brake oil tank. When two pedals are simultaneously stepped on to brake, the brake pump is disconnected from the brake oil tank, hydraulic oil from the brake pump enters the brake through the third oil inlet P3, the fourth oil inlet P4, the second flow passage L2 in the automatic brake valve body 2, the third flow passage L3, the first oil return port T1 of the second electromagnetic directional valve 3 and the second oil return port T2 of the third electromagnetic directional valve 4, so that the tractor brakes, and the system principle is shown in figure 4. In the pedal braking mode, one pedal can be independently pressed to perform unilateral braking.
In the electric control automatic braking mode, the second electromagnetic directional valve 3 and the third electromagnetic directional valve 4 are powered at the same time, the two electromagnetic valves are switched to work at the right position, the system principle is as shown in fig. 5, the incoming oil of the brake pump cannot enter the brake through the second flow passage L2 and the third flow passage L3, and the hydraulic oil P1 from the hydraulic pump enters the first electromagnetic directional valve 1 and is in a standby state. When the tractor is required to brake, the first electromagnetic directional valve 1 is electrified, the system principle is as shown in fig. 6, hydraulic oil P1 from the hydraulic pump enters the brake through a pipe joint 5 with an orifice, a first flow passage L1 in the valve body 2 of the automatic braking valve, a fifth oil inlet P5 of the second electromagnetic directional valve 3 and a sixth oil inlet P6 of the third electromagnetic directional valve 4, and the hydraulic oil enters the brake through the fourth flow passage L4 and the fifth flow passage L5, so that the tractor is braked. When the tractor does not need to brake, the first electromagnetic directional valve 1 is powered off, and the hydraulic oil P1 from the hydraulic pump is restored to a standby state.
The pressure measuring oil port G can monitor the braking pressure of the tractor during the electric control automatic braking at any time.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the whole of the present invention, but it is to be understood that the present invention is described in detail with reference to the foregoing embodiment, and that modifications in form or equivalents of some of the technical features described in the foregoing embodiment may be made by those skilled in the art. Modifications, equivalents, and the like, which are all intended to be included within the spirit and scope of the present invention, are intended to be included within the scope of the present invention.
Claims (1)
1. A brake valve block assembly for a tractor comprising: the automatic braking device comprises a first electromagnetic directional valve (1), an automatic braking valve body (2), a second electromagnetic directional valve (3), a third electromagnetic directional valve (4) and a pipe joint (5) with an orifice; the method is characterized in that: the pipe joint (5) with the throttle hole is arranged at the lower side of the automatic brake valve body (2), the first electromagnetic directional valve (1) is connected with the pipe joint (5) with the throttle hole in the brake valve block assembly through an oil pipe, and the second electromagnetic directional valve (3) and the third electromagnetic directional valve (4) are arranged at the right side of the automatic brake valve body (2) in parallel; six connecting oil ports are formed in the automatic brake valve body (2), wherein a third oil inlet (P3), a fourth oil inlet (P4), a first oil outlet (B1) and a second oil outlet (B2) are formed in the automatic brake valve body (2), the second oil inlet (P2) is formed in the lower side face of the automatic brake valve body (2), and a pressure measuring oil port (G1) is formed in the left side face of the automatic brake valve body (2); six internal oil ports are formed in the automatic brake valve body (2), wherein a fifth oil inlet (P5), a first oil return port (T1), a first working oil port (B '1), a sixth oil inlet (P6), a second oil return port (T2) and a second working oil port (B' 2) are arranged below the automatic brake valve body (2); five flow passages are formed in the automatic brake valve body (2), wherein the first flow passage (L1) is communicated with the second oil inlet (P2), the fifth oil inlet (P5), the sixth oil inlet (P6) and the pressure measuring oil port (G); the second flow channel (L2) is communicated with the first oil return port (T1) and the third oil inlet (P3); the third flow passage (L3) is communicated with the second oil return port (T2) and the fourth oil inlet (P4); a fourth runner (L4) communicated with the first working oil port (B' 1) and the first oil outlet (B1); and the fifth runner (L5) is communicated with the second working oil port (B' 2) and the second oil outlet (B2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810364942.6A CN108394395B (en) | 2018-04-23 | 2018-04-23 | Brake valve block assembly for tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810364942.6A CN108394395B (en) | 2018-04-23 | 2018-04-23 | Brake valve block assembly for tractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108394395A CN108394395A (en) | 2018-08-14 |
| CN108394395B true CN108394395B (en) | 2024-05-28 |
Family
ID=63100424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810364942.6A Active CN108394395B (en) | 2018-04-23 | 2018-04-23 | Brake valve block assembly for tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108394395B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110155015A (en) * | 2019-04-26 | 2019-08-23 | 第一拖拉机股份有限公司 | A kind of used with tractor automatic brake control valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0494070A2 (en) * | 1990-12-31 | 1992-07-08 | TEIJIN SEIKI CO. Ltd. | A hydraulic circuit for running a crawler vehicle |
| JPH072072A (en) * | 1993-05-20 | 1995-01-06 | Yanmar Agricult Equip Co Ltd | Working vehicle |
| CN202370928U (en) * | 2011-12-16 | 2012-08-08 | 第一拖拉机股份有限公司 | Low-pressure control and lubrication control valve block assembly for wheeled tractor |
| CN202703571U (en) * | 2012-06-07 | 2013-01-30 | 郭绪辉 | Automatic brake valve for automobile braking |
| CN104678999A (en) * | 2014-12-15 | 2015-06-03 | 刘丙炎 | Intelligent tractor |
| CN106402058A (en) * | 2016-10-28 | 2017-02-15 | 北京科技大学 | Valve block assembly of pure electric dump truck hydraulic lifting system |
| CN107676316A (en) * | 2017-11-07 | 2018-02-09 | 燕山大学 | A kind of braking control system and control method applied to hydraulic open system |
| CN208376732U (en) * | 2018-04-23 | 2019-01-15 | 第一拖拉机股份有限公司 | A kind of used with tractor brake valve block assembly |
-
2018
- 2018-04-23 CN CN201810364942.6A patent/CN108394395B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0494070A2 (en) * | 1990-12-31 | 1992-07-08 | TEIJIN SEIKI CO. Ltd. | A hydraulic circuit for running a crawler vehicle |
| JPH072072A (en) * | 1993-05-20 | 1995-01-06 | Yanmar Agricult Equip Co Ltd | Working vehicle |
| CN202370928U (en) * | 2011-12-16 | 2012-08-08 | 第一拖拉机股份有限公司 | Low-pressure control and lubrication control valve block assembly for wheeled tractor |
| CN202703571U (en) * | 2012-06-07 | 2013-01-30 | 郭绪辉 | Automatic brake valve for automobile braking |
| CN104678999A (en) * | 2014-12-15 | 2015-06-03 | 刘丙炎 | Intelligent tractor |
| CN106402058A (en) * | 2016-10-28 | 2017-02-15 | 北京科技大学 | Valve block assembly of pure electric dump truck hydraulic lifting system |
| CN107676316A (en) * | 2017-11-07 | 2018-02-09 | 燕山大学 | A kind of braking control system and control method applied to hydraulic open system |
| CN208376732U (en) * | 2018-04-23 | 2019-01-15 | 第一拖拉机股份有限公司 | A kind of used with tractor brake valve block assembly |
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| Publication number | Publication date |
|---|---|
| CN108394395A (en) | 2018-08-14 |
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