CN201769815U - Hydraulic brake valve of full hydraulic brake system of engineering machinery - Google Patents
Hydraulic brake valve of full hydraulic brake system of engineering machinery Download PDFInfo
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- CN201769815U CN201769815U CN2010205271539U CN201020527153U CN201769815U CN 201769815 U CN201769815 U CN 201769815U CN 2010205271539 U CN2010205271539 U CN 2010205271539U CN 201020527153 U CN201020527153 U CN 201020527153U CN 201769815 U CN201769815 U CN 201769815U
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- hydraulic brake
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- brake
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Abstract
The utility model discloses a hydraulic brake valve of a full hydraulic brake system of engineering machinery, which is controlled by a brake pedal (8). The hydraulic brake valve and the brake pedal (8) are respectively equipped on a bracket (3). The hydraulic brake system is provided with two hydraulic control oil ways which are respectively communicated with a brake wheel cylinder of a front axle and a back axle of an engineering machinery vehicle. The two hydraulic control oil ways are respectively provided with a three-position three-way directional valve. The valve cores of the two three-position three-way directional valves are connected in series. According to the technical solution, the hydraulic brake valve has a structure of a full hydraulic brake system. Various items of technical parameters and performance indexes satisfy the design requirement of the hydraulic system. Stable and reliable operation state and high safety are obtained. The reliability of sealing performance of product is improved. Improved design for important core component is performed for the inner structure of prior-art product for improving the performance, thereby improving the sealing performance and service life of the product.
Description
Technical field
The utility model belongs to the technical field of construction machinery and equipment, relates to the full power hydraulic brake system of engineering machinery vehicle operation, and more particularly, the utility model 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 the 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 height (positiver sealing), the manufacturing difficulty of processing is big, the kernel component dynamic sealing performance that the pass is built has leakage phenomenon, does not satisfy the requirement of product hydraulic braking seal tests, causes the hydraulic brake system brake to lose efficacy.
The utility model content
Problem to be solved in the utility model provides a kind of hydraulic brake valve of construction machinery and equipment full power hydraulic brake system, its objective is the all-hydraulic braking sealing performance that improves construction machinery and equipment, improves the reliability of all-hydraulic braking.
To achieve these goals, the technical scheme taked of the utility model is:
The hydraulic brake valve of construction machinery and equipment full power hydraulic brake system provided by the utility model, control by brake pedal, described hydraulic brake valve and brake pedal are installed on the 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 3-position-3-way change-over valve in described two hydraulic control oil circuits, the spool of these two 3-position-3-way change-over valves is connected in series.
The oil inlet of described two 3-position-3-way change-over valves is communicated with two prefill valves respectively, the actuator port of described two 3-position-3-way change-over 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 3-position-3-way change-over valves feeds petrol storage tank respectively; When brake pedal is in when depressing braking mode, the oil inlet of described two 3-position-3-way change-over valves is communicated with actuator port respectively.
Each is communicated with an energy storage oil inlet of described two 3-position-3-way change-over valves respectively.
The oil inlet of described 3-position-3-way change-over valve is communicated with guide's hydraulic efficiency pressure 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.
Make 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 technology.
The utility model 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 the kernel component of building at the inner structure of existing product and improve design, improved performance, thereby improve the braking sealing performance and the service life of product.
Description of drawings
Below expressed content of each width of cloth accompanying drawing of this specification sheets and the mark among the figure are made brief description:
Fig. 1 is a hydraulic brake valve systematic schematic diagram of the present utility model;
Fig. 2 is the cross-sectional schematic of the utility model structure;
Fig. 3 is the side schematic view of structure shown in Figure 2.
Be labeled as among the 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, the pedal turning cylinder, 10, split washer, 11, the roller turning cylinder, 12, roller, 13, screw.
The specific embodiment
Contrast accompanying drawing below, by description to embodiment, to effect and principle of work, the manufacturing process of the mutual alignment between the shape of the specific embodiment of the present utility model such as related each member, structure, the each several part and annexation, each several part and manipulate method etc., be described in further detail, inventive concept of the present utility model, technical scheme had more complete, accurate and deep understanding to help those skilled in the art.
As Fig. 1, Fig. 2 and the expressed structure of the present utility model of Fig. 3, the utility model is a kind of hydraulic brake valve of construction machinery and equipment full power hydraulic brake system, and by brake pedal 8 controls, described hydraulic brake valve and brake pedal 8 are installed on the 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 the all-hydraulic dual circuit fluid power that stops, and its effect is a 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 all-hydraulic braking of construction machinery and equipment, improve the goal of the invention of the reliability of braking, the technical scheme that the utility model is taked is:
Be the hydraulic brake valve of construction machinery and equipment full power hydraulic brake system provided by the utility model 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 3-position-3-way change-over valve in described two hydraulic control oil circuits, the spool of these two 3-position-3-way change-over valves is connected in series.
As shown in Figure 2:
The spool of these two 3-position-3-way change-over valves is respectively upper and lower piston valve core, is installed in respectively in upper valve body assembly 2 and the body assembly of lower valve 1.
Bolt 4, nut 5, spring washer 6 play the position-limiting action of brake pedal 8 when brake off resets.
Between support 3 and the 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 the 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 the body assembly of lower valve 1.
As shown in Figure 2, when depressing brake pedal, upper piston moves down, the oil pressure in first chamber raises, simultaneously promote lower piston again and move down, the oil pressure in 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 the braking of front and back two wheel cylinders.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 the 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 3-position-3-way change-over valves described in the utility model (P1, P2) is communicated with the two chamber actuator ports (A11, A21) of a prefill valve respectively, the actuator port of described two 3-position-3-way change-over 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 3-position-3-way change-over valves (T1, T2) feeds petrol storage tank respectively; When brake pedal 8 is in when depressing braking mode, the oil inlet of described two 3-position-3-way change-over valves (P1, P2) is communicated with actuator port (A1, A2) respectively.
The meta function of described two 3-position-3-way change-over valves is O type meta function, promptly 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 hydraulic brake valve and energy storage respectively by the stable constant oil mass of prefill valve output.When depressing brake pedal 8, hydraulic brake valve then can provide fluid to the front and rear wheel brake wheel cylinder, to implement braking.
(not fuel feeding liquid) is worked on by prefill valve when Hydraulic Pump or by pass valve operational failure, closes two two position two-way valves, by 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 3-position-3-way change-over valves described in the utility model 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 the 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 3-position-3-way change-over valve described in the utility model (P1) is communicated with guide's hydraulic efficiency pressure system.
The purpose that adopts guide's hydraulic efficiency pressure system is to make the braking and the state exchange of brake off realize pulsation-free transition more.
On the oil circuit of the brake wheel cylinder of back axle described in the utility model, establish the power cut switch, described power cut switch is the oil liquid pressure master cock.
Because general back axle, is still worked for avoiding power system when carrying out glancing impact for driving, the power cut switch begins to play a role.
On the oil circuit of the brake wheel cylinder of propons described in the utility model, make moving light switch, described stop lamp switch is the oil liquid pressure master cock.
Carrying out glancing impact, stop lamp switch is connected brake lamp, sends the signal of braking.
The upper and lower valve body material of hydraulic brake valve described in the utility model adopts spheroidal graphite iron QT450-10.
In the prior art, the upper and lower valve body material of hydraulic brake valve is selected HT200 for use, the utility model is selected the upper and lower valve body material of hydraulic brake valve for use spheroidal graphite iron (QT450-10), 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 described in the utility model adopts thick finish turning, expansion fraising, thick micro-honing, tumbling and polishing technology.
In the prior art, the design of the processing technology in the body master cylinder hole of hydraulic brake valve is unreasonable.The utility model improves design: mainly considers from the in-use performance of product, and the one, the stability of cylinder hole size tolerance is to guarantee hydraulic piston tension of engagement unanimity; The 2nd, the roughness of surface in cylinder hole is with the smoothness of guaranteeing hydraulic piston motion and the service life of product.Therefore adopt thick finish turning, expansion fraising, thick micro-honing, tumbling and polishing technology, guarantee that the hydraulic piston of product cooperates and sealing property with the motion in master cylinder hole.
(the SL01 hydraulic brake valve) that the utility model provides belongs to full power hydraulic brake system dual circuit hydraulic brake new structure, pass through verification experimental verification, finish the designing requirement that every technical parameter of attainment brake hydraulic pressure valve and performance have reached hydraulic brake system, the value of applying is arranged.
In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technical scheme carry out; or design of the present utility model and technical scheme are directly applied to other occasion without improving, all within protection domain of the present utility model.
Claims (7)
1. the hydraulic brake valve of a construction machinery and equipment full power hydraulic brake system, control by brake pedal (8), described hydraulic brake valve and brake pedal (8) are installed on the support (3), it is characterized in that: 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 3-position-3-way change-over valve in described two hydraulic control oil circuits, the spool of these two 3-position-3-way change-over valves is connected in series.
2. according to the hydraulic brake valve of the described construction machinery and equipment full power hydraulic brake system of claim 1, it is characterized in that: the oil inlet of described two 3-position-3-way change-over valves all is communicated with the actuator port of prefill valve respectively, the actuator port of described two 3-position-3-way change-over 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 3-position-3-way change-over valves feeds petrol storage tank respectively; When brake pedal (8) is in when depressing state, the oil inlet of described two 3-position-3-way change-over valves is communicated with actuator port respectively.
3. according to the hydraulic brake valve of the described construction machinery and equipment full power hydraulic brake system of claim 1, it is characterized in that: described brake system is established two energy storages, and the oil inlet of described two 3-position-3-way change-over valves is communicated with an energy storage respectively.
4. according to the hydraulic brake valve of the described construction machinery and equipment full power hydraulic brake system of claim 1, it is characterized in that: the oil inlet of described 3-position-3-way change-over valve is communicated with guide's hydraulic efficiency pressure system.
5. according to the hydraulic brake valve of the described construction machinery and equipment full power hydraulic brake system of claim 1, it is characterized in that: 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.
6. according to the hydraulic brake valve of the described construction machinery and equipment full power hydraulic brake system of claim 1, it is characterized in that: make 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.
7. according to the hydraulic brake valve of the described construction machinery and equipment full power hydraulic brake system of claim 1, it is characterized in that: the valve body material of described hydraulic brake valve adopts spheroidal graphite iron QT450-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205271539U CN201769815U (en) | 2010-09-08 | 2010-09-08 | Hydraulic brake valve of full hydraulic brake system of engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205271539U CN201769815U (en) | 2010-09-08 | 2010-09-08 | Hydraulic brake valve of full hydraulic brake system of engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201769815U true CN201769815U (en) | 2011-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205271539U Expired - Fee Related CN201769815U (en) | 2010-09-08 | 2010-09-08 | Hydraulic brake valve of full hydraulic brake system of engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201769815U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934789A (en) * | 2010-09-08 | 2011-01-05 | 芜湖盛力制动有限责任公司 | Hydraulic brake valve of full-hydraulic brake system in construction machinery |
| CN102501846A (en) * | 2011-12-19 | 2012-06-20 | 芜湖盛力制动有限责任公司 | Pneumatic brake valve for engineering machinery |
| CN106740794A (en) * | 2016-12-27 | 2017-05-31 | 芜湖盛力科技股份有限公司 | A kind of braking system of engineering machinery air brake valve |
-
2010
- 2010-09-08 CN CN2010205271539U patent/CN201769815U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934789A (en) * | 2010-09-08 | 2011-01-05 | 芜湖盛力制动有限责任公司 | Hydraulic brake valve of full-hydraulic brake system in construction machinery |
| CN101934789B (en) * | 2010-09-08 | 2013-06-12 | 芜湖盛力制动有限责任公司 | Hydraulic brake valve of full-hydraulic brake system in construction machinery |
| CN102501846A (en) * | 2011-12-19 | 2012-06-20 | 芜湖盛力制动有限责任公司 | Pneumatic brake valve for engineering machinery |
| CN106740794A (en) * | 2016-12-27 | 2017-05-31 | 芜湖盛力科技股份有限公司 | A kind of braking system of engineering machinery air brake valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20120908 |