CN101934789B - Hydraulic brake valve of full-hydraulic brake system in construction machinery - Google Patents
Hydraulic brake valve of full-hydraulic brake system in construction machinery Download PDFInfo
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- CN101934789B CN101934789B CN 201010280077 CN201010280077A CN101934789B CN 101934789 B CN101934789 B CN 101934789B CN 201010280077 CN201010280077 CN 201010280077 CN 201010280077 A CN201010280077 A CN 201010280077A CN 101934789 B CN101934789 B CN 101934789B
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Abstract
The invention discloses a hydraulic brake valve of a full-hydraulic brake system in construction machinery, controlled by a brake pedal (8). The hydraulic brake valve and the brake pedal (8) are mounted on a bracket (3), the full-hydraulic brake system is provided with two hydraulic control oil paths which are respectively communicated with brake wheel cylinders of a front axle and a rear axle of a construction machinery vehicle, either hydraulic control oil path is provided with a three-position three-way change valve, and value cores of the two three-position three-way change valves are connected in series. The hydraulic brake valve is of a full-hydraulic brake system structure, has the technical parameters and performance indexes satisfying the design requirements of the hydraulic system, stable and reliable working state and good safe performance, improves the reliability of product sealing performance and improves the design and the performance of key core parts aiming at the internal structure of a traditional product so as to improve the sealing performance and the service life of the product.
Description
Technical field
The invention belongs to the technical field of construction machinery and equipment, relate to the full power hydraulic brake system of engineering machinery vehicle operation, more particularly, the present invention relates to a kind of hydraulic brake valve of construction machinery and equipment full power hydraulic brake system.
Background technology
In the prior art, the hydraulic brake valve of using on engineering machinery vehicle (for example model is the hydraulic brake valve of SL01), its performance can not satisfy the requirement of engineering machinery hydraulic braking, the equal out of reach requirement of the reliability and stability of hydraulic packing performance.The upper and lower valve body inner bore of hydraulic brake valve and axle core fit dimension precision high (positiver sealing), the manufacturing difficulty of processing is large, the kernel component dynamic sealing performance that the pass is built has leakage phenomenon, can not meet the requirement of product hydraulic braking seal tests, causes the hydraulic brake system brake to lose efficacy.
Summary of the invention
Problem to be solved by this invention is to provide a kind of hydraulic brake valve of construction machinery and equipment full power hydraulic brake system, its objective is the Full-hydraulic braking apparatus sealing property that improves construction machinery and equipment, improves the reliability of Full-hydraulic braking apparatus.
To achieve these goals, the technical scheme taked of the present invention is:
The hydraulic brake valve of construction machinery and equipment full power hydraulic brake system provided by the present invention, controlled by brake pedal, described hydraulic brake valve and brake pedal are installed on support, described hydraulic brake system is provided with two hydraulic control oil circuits, respectively with engineering machinery vehicle on propons and the interface oil circuit of the brake wheel cylinder of back axle be communicated with, respectively be provided with a three position three-way change valve in described two hydraulic control oil circuits, the spool of these two three position three-way change valves is connected in series.
The oil inlet of described two three position three-way change valves is communicated with two prefill valves respectively, the actuator port of described two three position three-way change valves is communicated with the interface oil circuit of the brake wheel cylinder of the propons of engineering machinery vehicle and back axle respectively, and the return opening of described two three position three-way change valves passes into respectively petrol storage tank; When brake pedal is in when depressing braking mode, the oil inlet of described two three position three-way change valves is communicated with actuator port respectively.
Each is communicated with an energy storage oil inlet of described two three position three-way change valves respectively.
The oil inlet of described three position three-way change valve is communicated with leading hydraulic system.
Establish the power cut switch on the oil circuit of the brake wheel cylinder of described back axle, described power cut switch is communicated with the oil circuit of the brake wheel cylinder of described back axle, and described power cut switch is the oil liquid pressure master cock.
Be equipped with moving light switch on the oil circuit of the brake wheel cylinder of described propons, described stop lamp switch is communicated with the oil circuit of the brake wheel cylinder of described propons, and described stop lamp switch is the oil liquid pressure master cock.
The valve body material of described hydraulic brake valve adopts spheroidal graphite iron QT450-10.
Described hydraulic brake valve the processing technology in valve body master cylinder hole adopt thick finish turning, expand fraising, thick micro-honing, tumbling and polishing technique.
The present invention adopts technique scheme, is the full power hydraulic brake system structure, and its every technical parameter and performance figure have satisfied the designing requirement of construction machinery and equipment full power hydraulic brake system, and stable working state is reliable, and safety performance is good; Improved the reliability of hydraulic brake system sealing property, closed for the inner structure of existing product the kernel component of building and improve design, improved performance, thereby improve braking sealing performance and the service life of product.
Description of drawings
The below is briefly described the expressed content of each width accompanying drawing of this specification sheets and the mark in figure:
Fig. 1 is hydraulic brake valve systematic schematic diagram of the present invention;
Fig. 2 is the cross-sectional schematic of structure of the present invention;
Fig. 3 is the side schematic view of structure shown in Figure 2.
Be labeled as in figure:
1, body assembly of lower valve, 2, the upper valve body assembly, 3, support, 4, bolt, 5, nut, 6, spring washer, 7,, bolt, 8, brake pedal, 9, pedal rotating shaft, 10, split washer, 11, the roller turning cylinder, 12, roller, 13, screw.
The specific embodiment
The below contrasts accompanying drawing, by the description to embodiment, effect and principle of work, manufacturing process and operation using method etc. to the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, each several part and annexation, each several part, be described in further detail, to help those skilled in the art, inventive concept of the present invention, technical scheme had more complete, accurate and deep understanding.
As Fig. 1, Fig. 2 and the expressed structure of the present invention of Fig. 3, the present invention is a kind of hydraulic brake valve of construction machinery and equipment full power hydraulic brake system, is controlled by brake pedal 8, and described hydraulic brake valve and brake pedal 8 are installed on support 3.The hydraulic brake valve of construction machinery and equipment full power hydraulic brake system (SL01) is mainly used in the walking of fork truck, loader, road grader, excavating machine and handling machinery thereof, mining machinery, the directly moving brake system of all-hydraulic dual circuit fluid power of stopping, and its effect is dominant project mechanical-hydraulic brake equipment.
In order to solve the problem that exists at the described present known technology of this specification sheets background technology part and to overcome its defective, realize the Full-hydraulic braking apparatus of construction machinery and equipment, improve the goal of the invention of the reliability of braking, the technical scheme that the present invention takes is:
Be the hydraulic brake valve of construction machinery and equipment full power hydraulic brake system provided by the present invention as shown in Figure 1 in the long and two-short dash line frame, described hydraulic brake system is provided with two hydraulic control oil circuits, be communicated with the interface oil circuit of the brake wheel cylinder of the propons of engineering machinery vehicle and back axle respectively, respectively be provided with a three position three-way change valve in described two hydraulic control oil circuits, the spool of these two three position three-way change valves is connected in series.
As shown in Figure 2:
The spool of these two three position three-way change valves is respectively upper and lower piston valve core, is arranged on respectively in upper valve body assembly 2 and body assembly of lower valve 1.
Between support 3 and upper valve body assembly 2, be fastenedly connected by a plurality of bolts 7.
In order to reduce the wearing and tearing between brake pedal 8 and spool push rod, adopt the structure of roller 12, roller 12 is installed by roller turning cylinder 11.
As shown in Figure 3, be fastenedly connected by screw 13 between upper valve body assembly 2 and body assembly of lower valve 1.
As shown in Figure 2, when depressing brake pedal, upper piston moves down, the oil pressure in the first chamber raises, simultaneously promote again lower piston and move down, the oil pressure in the second chamber raises, and overcomes spring force, high pressure is braked the brake piping that fluid (first and second chamber) oil pressure flows into propons and back axle, and then front and back two wheel cylinder brakings.When loosen the brake pedal 8 (brake off), upper and lower piston is got back to initial position under action of the spring, fluid in brake wheel cylinder and pipeline, and the oil return pipe that flows back to hydraulic brake valve is got back to petrol storage tank.
The oil inlet of two three position three-way change valves of the present invention (P1, P2) is communicated with the two chamber actuator ports (A11, A21) of a prefill valve respectively, the actuator port of described two three position three-way change valves (A1, A2) respectively with engineering machinery vehicle on propons and the interface oil circuit of the brake wheel cylinder of back axle be communicated with, the return opening of described two three position three-way change valves (T1, T2) passes into respectively petrol storage tank; When brake pedal 8 is in when depressing braking mode, the oil inlet of described two three position three-way change valves (P1, P2) is communicated with actuator port (A1, A2) respectively.
The Median Function of described two three position three-way change valves is O type Median Function, namely is totally-enclosed hydraulic fluid port.At this moment, neither forward, the brake wheel cylinder of back axle provides braking fluid, simultaneously, brake wheel cylinder does not discharge hydraulic braking force yet.
This hydraulic brake valve flows into respectively hydraulic brake valve and energy storage by the constant oil mass of prefill valve stable output.When depressing brake pedal 8, hydraulic brake valve can provide fluid to the front and rear wheel brake wheel cylinder, to implement braking.
When Hydraulic Pump or by pass valve operational failure (not supplying fluid), worked on by prefill valve, close two two position two-way valves, cut-off actuator port (A1, A2) makes energy storage (1.6L) oil pressure keep certain reservoir pressure (the fluid energy does not discharge).When depressing brake pedal 8, hydraulic brake valve works on, and forward, the wheel brake wheel cylinder of back axle provides fluid, to implement braking.
The oil inlet of two three position three-way change valves of the present invention is communicated with an energy storage respectively.
The volume of energy storage is 1.6L.Prefill valve oil inlet (P1, P2) is communicated with Hydraulic Pump, by the Hydraulic Pump fuel feeding.Establish by pass valve on Hydraulic Pump outlet oil circuit, set up system pressure.When the system oil hydraulic coupling was too high, by pass valve was opened draining.
The oil inlet of three position three-way change valve of the present invention (P1) is communicated with leading hydraulic system.
The purpose that adopts leading hydraulic system is to make braking and the state conversion of brake off realize pulsation-free transition more.
On the oil circuit of the brake wheel cylinder of back axle of the present invention, establish the power cut switch, described power cut switch is the oil liquid pressure master cock.
,, still work for avoiding power system when braking for driving due to general back axle, the power cut switch begins to play a role.
On the oil circuit of the brake wheel cylinder of propons of the present invention, be equipped with moving light switch, described stop lamp switch is the oil liquid pressure master cock.
When braking, stop lamp switch is connected brake lamp, sends the signal of braking.
The upper and lower valve body material of hydraulic brake valve of the present invention adopts spheroidal graphite iron QT450-10.
In the prior art, the upper and lower valve body material of hydraulic brake valve is selected HT200, the present invention selects spheroidal graphite iron (QT450-10) with the upper and lower valve body material of hydraulic brake valve, and purpose is to guarantee that the special construction of product and bore area have higher hardness and improve roughness of surface.
The processing technology in the upper and lower valve body master cylinder hole of hydraulic brake valve of the present invention adopts thick finish turning, expands fraising, thick micro-honing, tumbling and polishing technique.
In the prior art, the Design Processing in the body master cylinder hole of hydraulic brake valve is unreasonable.The present invention improves design: mainly considers from the in-use performance of product, and the one, the stability of the dimension limit in cylinder hole is consistent to guarantee the hydraulic piston tension of engagement; The 2nd, the roughness of surface in cylinder hole is with the smoothness of guaranteeing the hydraulic piston motion and the service life of product.Therefore adopt thick finish turning, expansion fraising, thick micro-honing, tumbling and polishing technique, the hydraulic piston of assurance product coordinates and sealing property with the motion in master cylinder hole.
(SL01 hydraulic brake valve) provided by the invention belongs to full power hydraulic brake system dual circuit hydraulic brake new structure, pass through verification experimental verification, complete the designing requirement that the every technical parameter of attainment brake hydraulic pressure valve and performance have reached hydraulic brake system, the value of applying is arranged.
The above is exemplarily described the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (1)
1. the hydraulic brake valve of a construction machinery and equipment full power hydraulic brake system, controlled by brake pedal (8), described hydraulic brake valve and brake pedal (8) are installed on support (3), described hydraulic brake system is provided with two hydraulic control oil circuits, respectively with engineering machinery vehicle on propons and the brake wheel cylinder interface oil circuit of back axle be communicated with, respectively be provided with a three position three-way change valve in described two hydraulic control oil circuits, the spool of these two three position three-way change valves is connected in series;
The oil inlet of described two three position three-way change valves all is communicated with the actuator port of prefill valve respectively, the actuator port of described two three position three-way change valves is communicated with the interface oil circuit of the brake wheel cylinder of the propons of engineering machinery vehicle and back axle respectively, and the return opening of described two three position three-way change valves passes into respectively petrol storage tank;
When brake pedal (8) is in when depressing state, the oil inlet of described two three position three-way change valves is communicated with actuator port respectively;
Described brake system is established two energy storages, and the oil inlet of described two three position three-way change valves is communicated with an energy storage respectively;
The oil inlet of described three position three-way change valve is communicated with leading hydraulic system;
Establish the power cut switch on the oil circuit of the brake wheel cylinder of described back axle, described power cut switch is communicated with the oil circuit of the brake wheel cylinder of described back axle, and described power cut switch is the oil liquid pressure master cock;
Be equipped with moving light switch on the oil circuit of the brake wheel cylinder of described propons, described stop lamp switch is communicated with the oil circuit of the brake wheel cylinder of described propons, and described stop lamp switch is the oil liquid pressure master cock;
It is characterized in that:
The valve body material of described hydraulic brake valve adopts spheroidal graphite iron QT450-10;
The processing technology in the valve body master cylinder hole of described hydraulic brake valve adopts thick finish turning, expands fraising, thick micro-honing, tumbling and polishing technique;
The volume of energy storage is 1.6L; Prefill valve oil inlet (P1, P2) is communicated with Hydraulic Pump, by the Hydraulic Pump fuel feeding;
Establish by pass valve on Hydraulic Pump outlet oil circuit, set up system pressure, when the system oil hydraulic coupling was too high, by pass valve was opened draining;
When Hydraulic Pump or by pass valve operational failure, when not supplying fluid, worked on by prefill valve, close two two position two-way valves, cut-off actuator port (A1, A2) makes the oil pressure of energy storage keep certain reservoir pressure, and the fluid energy does not discharge; When depressing brake pedal (8), hydraulic brake valve works on, and forward, the wheel brake wheel cylinder of back axle provides fluid, to implement braking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010280077 CN101934789B (en) | 2010-09-08 | 2010-09-08 | Hydraulic brake valve of full-hydraulic brake system in construction machinery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010280077 CN101934789B (en) | 2010-09-08 | 2010-09-08 | Hydraulic brake valve of full-hydraulic brake system in construction machinery |
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| CN101934789A CN101934789A (en) | 2011-01-05 |
| CN101934789B true CN101934789B (en) | 2013-06-12 |
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| CN 201010280077 Active CN101934789B (en) | 2010-09-08 | 2010-09-08 | Hydraulic brake valve of full-hydraulic brake system in construction machinery |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514564A (en) * | 2012-01-04 | 2012-06-27 | 江苏柳工机械有限公司 | Power cut-off electric control system for unilateral driving brake of engineering vehicle |
| CN106627541B (en) * | 2016-09-30 | 2023-06-09 | 三环集团有限公司 | Active hydraulic braking system of automobile |
| CN108674402B (en) * | 2018-05-23 | 2020-02-18 | 浙江海宏液压科技股份有限公司 | Full-hydraulic reverse braking clutch system |
| CN108891397A (en) * | 2018-06-14 | 2018-11-27 | 杭叉集团股份有限公司 | Electri forklift full power hydraulic brake system |
| CN108891398A (en) * | 2018-06-14 | 2018-11-27 | 杭叉集团股份有限公司 | Hydraulic valve block for brake system of forklift |
Citations (4)
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|---|---|---|---|---|
| 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 |
| CN201494429U (en) * | 2009-07-21 | 2010-06-02 | 广西柳工机械股份有限公司 | Full hydraulic 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 |
| CN201769815U (en) * | 2010-09-08 | 2011-03-23 | 芜湖盛力制动有限责任公司 | Hydraulic brake valve of full hydraulic brake system of engineering machinery |
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2010
- 2010-09-08 CN CN 201010280077 patent/CN101934789B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201494429U (en) * | 2009-07-21 | 2010-06-02 | 广西柳工机械股份有限公司 | Full hydraulic 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 |
| CN201769815U (en) * | 2010-09-08 | 2011-03-23 | 芜湖盛力制动有限责任公司 | Hydraulic brake valve of full hydraulic brake system of engineering machinery |
Non-Patent Citations (4)
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| 广西柳工机械股份有限公司等.装载机全液压制动系统的改进设计.《工程机械》.2008,第39卷49-52. |
| 装载机全液压制动系统的改进设计;广西柳工机械股份有限公司等;《工程机械》;20080630;第39卷;49-52 * |
| 装载机制动控制系统的研究;陈健;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20080515(第05期);22-27 * |
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Owner name: WUHU SHENGLI TECHNOLOGY CO., LTD Free format text: FORMER NAME: SHENGLI BRAKE CO., LTD., WUHU |
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Address after: 241003 No. 17 West Mountain Road, hi tech Industrial Development Zone, Anhui, Wuhu Patentee after: Wuhu Shengli Technology Shares Co., Ltd. Address before: 241003 No. 8, Jinshan Road, hi tech Industrial Development Zone, Yijiang District, Anhui, Wuhu Patentee before: Shengli Brake Co., Ltd., Wuhu |
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