CN103465891A - Hydraulic braking system - Google Patents
Hydraulic braking system Download PDFInfo
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- CN103465891A CN103465891A CN2013104415396A CN201310441539A CN103465891A CN 103465891 A CN103465891 A CN 103465891A CN 2013104415396 A CN2013104415396 A CN 2013104415396A CN 201310441539 A CN201310441539 A CN 201310441539A CN 103465891 A CN103465891 A CN 103465891A
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Abstract
The invention discloses a hydraulic braking system. The braking system comprises a braking pump, a prefill valve and a treadle valve, wherein the oil outlet of the braking pump is connected with the oil inlet of the prefill valve, the return opening of the prefill valve is connected with a return tank; the prefill valve comprises a first charging port and a second charging port; the treadle valve comprises a first treadle valve and a second treadle valve, wherein the first charging port is connected with the oil inlet of the first treadle valve, the second charging port is connected with the oil inlet of the second treadle valve, and the return openings of the first treadle valve and the second treadle valve are both connected with the return tank, the oil outlet of the first treadle valve is connected with a rear axle brake, and the oil outlet of the second treadle valve is connected with a front axle brake. By adopting the hydraulic braking system, the braking system can be greatly simplified in structure; by adopting two-way braking, the reliability is high.
Description
Technical field
The present invention relates to a kind of hydraulic brake system, particularly relate to a kind of hydraulic brake system of loader, belong to technical field of engineering machinery.
Background technology
Loader is the civil machinery for shovel dress and transported material, the brake system of loader is extremely important, if brake system loses efficacy, serious accident appearred possibly, mechanical loader braking system is the brake system that adopts gas cap oil at present, utilize air compressor to produce the compressed-air-storing of certain pressure in gas tank, whether connection by brake pedal control presssure gas, after stepping on brake pedal, pressed gas is introduced into system, then pressed gas passes through assistor, utilize area difference to produce the high pressure brake noise, brake noise enters the drg on wheel limit, thereby produce the braking force braking, but due to air-operated hydraulic brake system complexity, reliability is not high, if producing, pressure gas leaks or the high pressure brake fluid low, can make braking unable even invalid, this situation is breakneck.
Summary of the invention
The purpose of this invention is to provide a kind of novel hydraulic brake system, native system is simple in structure, and good reliability adopts Redundancy Design to make the reliability of braking improve, and its cost is also very cheap simultaneously.
Technical scheme: a kind of hydraulic brake system, comprise brake pump, prefill valve and treadle valve, the oil outlet of described brake pump is connected with the oil inlet of described prefill valve, the return opening of described prefill valve takes back fuel tank, described prefill valve comprises the first implementation of port and the second implementation of port, described treadle valve comprises the first treadle valve and the second treadle valve, described the first implementation of port is connected with the oil inlet of described the first treadle valve, described the second implementation of port is connected with the oil inlet of described the second treadle valve, the return opening of described the first treadle valve and described the second treadle valve all takes back fuel tank, the oil outlet of described the first treadle valve connects rear axle brake vi, the oil outlet of described the second treadle valve connects the propons drg.
Because native system has adopted hydraulic braking, good braking effect, reliability is strong, the first treadle valve connection rear axle brake vi due to described treadle valve, the second treadle valve is communicated with the propons drg, the braking of described the first treadle valve is ahead of described the second treadle valve a little, makes braking more reasonable, the danger of avoiding vehicle to lean forward.
Also comprise energy storage, described energy storage setting is all in the downstream of described the first implementation of port and described the second implementation of port.
Also be provided with pressure switch on described prefill valve, described pressure switch can be closed during lower than setting value at surveyed pressure.Like this can be at brake-pressure lower than the setting value alarm, the prompting chaufeur, safer.
Also be provided with the power cut switch on the first implementation of port of described prefill valve and the oil circuit of the second implementation of port, described power cut switch can be closed when surveyed pressure reaches preset value.The pressure cut off switch can cut off the power of driving engine when braking, and braking is more prone to more reasonable.
The present invention, by adopting hydraulic brake system, makes brake system structure greatly simplify, and adopts Dual-path brake, even wherein break down in a road, also can brake, and reliability is high.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is the embodiment of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1, a kind of hydraulic brake system, comprise brake pump 1, prefill valve 2 and treadle valve 3, the oil outlet of described brake pump 1 is connected with the oil inlet of described prefill valve 2, the return opening of described prefill valve 2 takes back fuel tank, described prefill valve 2 comprises the first implementation of port 4 and the second implementation of port 5, described treadle valve 3 comprises the first treadle valve 6 and the second treadle valve 7, described the first implementation of port 4 is connected with the oil inlet of described the first treadle valve 6, described the second implementation of port 5 is connected with the oil inlet of described the second treadle valve 7, the return opening of described the first treadle valve 6 and described the second treadle valve 7 all takes back fuel tank, the oil outlet of described the first treadle valve 6 connects rear axle brake vi 8, the oil outlet of described the second treadle valve 7 connects propons drg 9.
Also comprise energy storage 10, described energy storage 10 arranges all the downstream in described the first implementation of port 4 and described the second implementation of port 5.
Also be provided with pressure switch 11 on described prefill valve 2, described pressure switch 11 can be closed during lower than setting value at surveyed pressure.
Also be provided with power cut switch 12 on the first implementation of port 4 of described prefill valve 2 and the oil circuit of the second implementation of port 5, described power cut switch 12 can be closed when surveyed pressure reaches preset value.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.
Claims (4)
1. a hydraulic brake system, comprise brake pump (1), prefill valve (2) and treadle valve (3), it is characterized in that: the oil outlet of described brake pump (1) is connected with the oil inlet of described prefill valve (2), the return opening of described prefill valve (2) takes back fuel tank, described prefill valve (2) comprises the first implementation of port (4) and the second implementation of port (5), described treadle valve (3) comprises the first treadle valve (6) and the second treadle valve (7), described the first implementation of port (4) is connected with the oil inlet of described the first treadle valve (6), described the second implementation of port (5) is connected with the oil inlet of described the second treadle valve (7), the return opening of described the first treadle valve (6) and described the second treadle valve (7) all takes back fuel tank, the oil outlet of described the first treadle valve (6) connects rear axle brake vi (8), the oil outlet of described the second treadle valve (7) connects propons drg (9).
2. a kind of hydraulic brake system as claimed in claim 1 is characterized in that: also comprise energy storage (10), described energy storage (10) arranges all the downstream in described the first implementation of port (4) and described the second implementation of port (5).
3. a kind of hydraulic brake system as claimed in claim 1 is characterized in that: also be provided with pressure switch (11) on described prefill valve (2), described pressure switch (11) can be closed during lower than setting value at surveyed pressure.
4. as a kind of hydraulic brake system as described in claim 1 or 2 or 3, it is characterized in that: also be provided with power cut switch (12) on first implementation of port (4) of described prefill valve (2) and the oil circuit of the second implementation of port (5), described power cut switch (12) can be closed when surveyed pressure reaches preset value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104415396A CN103465891A (en) | 2013-09-26 | 2013-09-26 | Hydraulic braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104415396A CN103465891A (en) | 2013-09-26 | 2013-09-26 | Hydraulic braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103465891A true CN103465891A (en) | 2013-12-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013104415396A Pending CN103465891A (en) | 2013-09-26 | 2013-09-26 | Hydraulic braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103465891A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358729A (en) * | 2014-11-14 | 2015-02-18 | 山推工程机械股份有限公司 | Hydraulic start-stop device and method for engine for engineering machinery |
| CN105221738A (en) * | 2014-05-27 | 2016-01-06 | 约翰迪尔（天津）有限公司 | Gearbox power cutoff control system, hydraulic braking sytem and method, traveling gear |
| CN107472225A (en) * | 2016-07-30 | 2017-12-15 | 汽解放柳州特种汽车有限公司 | The hydraulic control system of long head mine car |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0041020A1 (en) * | 1980-05-22 | 1981-12-02 | Automobiles Citroen | Pressure regulating means for a vehicle brake control unit |
| CN201026870Y (en) * | 2006-12-27 | 2008-02-27 | 广西柳工机械股份有限公司 | Integration full hydraulic pressure brake valve |
| CN201553138U (en) * | 2009-11-12 | 2010-08-18 | 浙江军联机械电子控股有限公司 | Loading machine walking hydraulic braking system mechanism |
| CN201923203U (en) * | 2010-12-01 | 2011-08-10 | 泸州长起特种起重设备有限公司 | Hydraulic steering and brake circuit for two-bridge engineering machinery |
| JP2012159131A (en) * | 2011-01-31 | 2012-08-23 | Kcm:Kk | Hydraulic pump control system for industrial vehicle and industrial vehicle |
-
2013
- 2013-09-26 CN CN2013104415396A patent/CN103465891A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0041020A1 (en) * | 1980-05-22 | 1981-12-02 | Automobiles Citroen | Pressure regulating means for a vehicle brake control unit |
| CN201026870Y (en) * | 2006-12-27 | 2008-02-27 | 广西柳工机械股份有限公司 | Integration full hydraulic pressure brake valve |
| CN201553138U (en) * | 2009-11-12 | 2010-08-18 | 浙江军联机械电子控股有限公司 | Loading machine walking hydraulic braking system mechanism |
| CN201923203U (en) * | 2010-12-01 | 2011-08-10 | 泸州长起特种起重设备有限公司 | Hydraulic steering and brake circuit for two-bridge engineering machinery |
| JP2012159131A (en) * | 2011-01-31 | 2012-08-23 | Kcm:Kk | Hydraulic pump control system for industrial vehicle and industrial vehicle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221738A (en) * | 2014-05-27 | 2016-01-06 | 约翰迪尔（天津）有限公司 | Gearbox power cutoff control system, hydraulic braking sytem and method, traveling gear |
| CN104358729A (en) * | 2014-11-14 | 2015-02-18 | 山推工程机械股份有限公司 | Hydraulic start-stop device and method for engine for engineering machinery |
| CN107472225A (en) * | 2016-07-30 | 2017-12-15 | 汽解放柳州特种汽车有限公司 | The hydraulic control system of long head mine car |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131225 |