CN201300829Y - Hydraulic braking system for wheel type hydraulic excavator - Google Patents
Hydraulic braking system for wheel type hydraulic excavator Download PDFInfo
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- CN201300829Y CN201300829Y CNU200820096772XU CN200820096772U CN201300829Y CN 201300829 Y CN201300829 Y CN 201300829Y CN U200820096772X U CNU200820096772X U CN U200820096772XU CN 200820096772 U CN200820096772 U CN 200820096772U CN 201300829 Y CN201300829 Y CN 201300829Y
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- braking
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Abstract
The utility model discloses a hydraulic braking system for a wheel type hydraulic excavator, belonging to braking systems and aiming at providing a hydraulic braking system which is quick and safe in braking. The hydraulic braking system comprises a hand braking valve and a foot braking valve; front and back braking oil cylinders(2,3)are respectively communicated with front and back braking valves(11,4); the oil inlets of the two braking valves are communicated with a servo pump(8), and the oil return ports of the two braking valves are communicated with an oil tank; the working oil port of a reversing valve(7) is communicated with the control ends of the front and back braking valves(11,4); the oil inlet of the reversing valve(7)is communicated with a working oil port of the foot braking valve(5), and the oil return port of the reversing valve is communicated with the a working oil port of the hand braking valve(6); the b working oil port of the hand braking valve(6) is respectively communicated with the pilot end of the reversing valve(7) and an braking oil cylinder(1); the oil inlets of the hand braking valve(6) and the foot braking valve(5) are respectively communicated with the servo pump(8); and the oil return ports of the hand braking valve and the foot braking valve are respectively communicated with the oil tank. The hydraulic braking system is mainly used for a wheel type hydraulic excavator.
Description
Technical field:
The utility model relates to a kind of brake system, relates in particular to a kind of hydraulic brake system that is used for hydraulic wheel excavator.
Background technology:
As everyone knows, the quality of hydraulic excavator brake system directly has influence on the stationarity of car load and operator's safety.At present, the brake system of homemade hydraulic wheel excavator adopts the compression air brake mode mostly; Owing to need to be equipped with Air compressor, therefore complex structure not only, impact shock is bigger, and the stationarity of car load and operator's safety is difficult to be guaranteed.
Summary of the invention:
At the above-mentioned defective that exists in the prior art, the utility model aim to provide a kind of braking fast, safety, easy to operate hydraulic wheel excavator hydraulic brake system.
To achieve these goals, the utility model by the following technical solutions: it comprises parking brake valve and service brake valve; Front brake oil cylinder, back brake oil cylinder are held with preceding brake activation valve, the back actuator port of brake activation valve and guide respectively and are communicated with, and the oil inlet of above-mentioned two brake activation valves is communicated with servopump respectively, return opening is communicated with fuel tank; The actuator port of change-over valve is communicated with the control end of preceding brake activation valve, back brake activation valve respectively, and the oil inlet of change-over valve is communicated with the actuator port of service brake valve, and the return opening of change-over valve is communicated with a actuator port of parking brake valve; The b actuator port of parking brake valve is communicated with the guide's end and the brake cylinder of change-over valve respectively, and the oil inlet of parking brake valve is communicated with servopump, and the return opening of parking brake valve is communicated with fuel tank; The oil inlet of service brake valve is communicated with servopump respectively, and the return opening of service brake valve is communicated with fuel tank.
On servopump and oil circuit that preceding brake activation valve is communicated with and on servopump and the oil circuit that the back brake activation valve is communicated with, respectively be provided with a check valve; Exit end at each check valve is provided with energy storage.
Compared with the prior art, the utility model is owing to be medium with hydraulic oil, and adopted technique scheme, therefore has the following advantages:
1, volume is little, in light weight, applicable to the braking under the different situations;
2, handle control conveniently, the retro-speed scope is wide;
3, can realize electricity, liquid integrated control of braking easily;
4, job security is good, is easy to realize overload protection;
5, braking response is fast, and dynamic characteristics is good.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Among the figure: brake activation valve 11 before brake cylinder 1 Front brake oil cylinder 2 back brake oil cylinders 3 back brake activation valves 4 service brake valves 5 parking brake valves 6 change-over valves 7 servopumps 8 energy storages 9 check valves 10
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment:
As shown in Figure 1: Front brake oil cylinder 2, back brake oil cylinder 3 are respectively by oil pipe and preceding brake activation valve 11, afterwards the actuator port of brake activation valve 4 and guide hold and be communicated with, the oil inlet of preceding brake activation valve 11, back brake activation valve 4 is communicated with servopump 8 by oil pipe respectively, and the return opening of preceding brake activation valve 11, back brake activation valve 4 is communicated with fuel tank by oil pipe respectively.The actuator port of change-over valve 7 is communicated with by the control end of oil pipe with preceding brake activation valve 11, back brake activation valve 4 respectively, the oil inlet of change-over valve 7 is communicated with by the actuator port of oil pipe with service brake valve 5, and the return opening of change-over valve 7 is communicated with a actuator port of parking brake valve 6 by oil pipe.The b actuator port of parking brake valve 6 is communicated with the guide's end and the brake cylinder 1 of change-over valve 7 by oil pipe respectively, and the oil inlet of this parking brake valve is communicated with servopump 8 by oil pipe, and the return opening of this parking brake valve is communicated with fuel tank by oil pipe.The oil inlet of service brake valve 5 is communicated with servopump 8 by oil pipe, and the return opening of this service brake valve is communicated with fuel tank by oil pipe.In order to improve the braking reliability, avoid brake cylinder 1, Front brake oil cylinder 2, back brake oil cylinder 3 in the glancing impact oil return, on servopump 8 and oil circuit that preceding brake activation valve 11 is communicated with and on servopump 8 and the oil circuit that afterwards brake activation valve 4 is communicated with, respectively be provided with a check valve 10.In order to improve the speed of response of braking, be provided with energy storage 9 at the exit end of each check valve 10.
In technique scheme, brake cylinder 1 is a normally closed, and Front brake oil cylinder 2 and back brake oil cylinder 3 are open in usual; Brake activation valve 4, service brake valve 5, change-over valve 7 are two-position three-way valve, and parking brake valve 6 is two position and four-way reversing valves; Wherein, service brake valve 5 has when trampling pressure continually varying characteristic, and parking brake valve 6 has only the switching two states.
Principle of work: the service brake glancing impact, have only brake oil cylinder 2 and 3 work of back brake oil cylinder, and brake cylinder 1 is not worked; When the parking brake glancing impact, brake cylinder 1, Front brake oil cylinder 2 and back brake oil cylinder 3 are worked simultaneously.
Claims (3)
1. a hydraulic wheel excavator hydraulic brake system comprises parking brake valve and service brake valve; It is characterized in that: Front brake oil cylinder (2), back brake oil cylinder (3) are held and are communicated with the actuator port and the guide of preceding brake activation valve (11), back brake activation valve (4) respectively, and the oil inlet of above-mentioned two brake activation valves is communicated with servopump (8) respectively, return opening is communicated with fuel tank; The actuator port of change-over valve (7) is communicated with the control end of preceding brake activation valve (11), back brake activation valve (4) respectively, and the oil inlet of change-over valve (7) is communicated with the actuator port of service brake valve (5), and the return opening of change-over valve (7) is communicated with a actuator port of parking brake valve (6); The b actuator port of parking brake valve (6) is communicated with the guide's end and the brake cylinder (1) of change-over valve (7) respectively, and the oil inlet of parking brake valve (6) is communicated with servopump (8), and the return opening of parking brake valve (6) is communicated with fuel tank; The oil inlet of service brake valve (5) is communicated with servopump (8), and the return opening of service brake valve (5) is communicated with fuel tank.
2. hydraulic wheel excavator hydraulic brake system according to claim 1 is characterized in that: respectively be provided with a check valve (10) on servopump (8) and oil circuit that preceding brake activation valve (11) is communicated with and on servopump (8) and the oil circuit that back brake activation valve (4) is communicated with.
3. hydraulic wheel excavator hydraulic brake system according to claim 2 is characterized in that: the exit end at each check valve (10) is provided with energy storage (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820096772XU CN201300829Y (en) | 2008-11-13 | 2008-11-13 | Hydraulic braking system for wheel type hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820096772XU CN201300829Y (en) | 2008-11-13 | 2008-11-13 | Hydraulic braking system for wheel type hydraulic excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201300829Y true CN201300829Y (en) | 2009-09-02 |
Family
ID=41084449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820096772XU Expired - Lifetime CN201300829Y (en) | 2008-11-13 | 2008-11-13 | Hydraulic braking system for wheel type hydraulic excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201300829Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863270A (en) * | 2010-03-18 | 2010-10-20 | 三一重机有限公司 | Hydraulic brake device of dumper for mining |
| CN102363424A (en) * | 2011-06-30 | 2012-02-29 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Loading brake system for electric wheel mining dump trucks |
| CN103085657A (en) * | 2013-01-29 | 2013-05-08 | 三一重工股份有限公司 | Open type hydraulic system capable of braking, braking method and walking machinery |
| CN105459992A (en) * | 2015-03-16 | 2016-04-06 | 贵州詹阳动力重工有限公司 | Parking control method and device for wheel type hydraulic engineering vehicle |
| CN111749956A (en) * | 2020-06-22 | 2020-10-09 | 贵州詹阳动力重工有限公司 | Hydraulic control system for multipurpose wheeled engineering vehicle |
-
2008
- 2008-11-13 CN CNU200820096772XU patent/CN201300829Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863270A (en) * | 2010-03-18 | 2010-10-20 | 三一重机有限公司 | Hydraulic brake device of dumper for mining |
| CN102363424A (en) * | 2011-06-30 | 2012-02-29 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Loading brake system for electric wheel mining dump trucks |
| CN103085657A (en) * | 2013-01-29 | 2013-05-08 | 三一重工股份有限公司 | Open type hydraulic system capable of braking, braking method and walking machinery |
| CN105459992A (en) * | 2015-03-16 | 2016-04-06 | 贵州詹阳动力重工有限公司 | Parking control method and device for wheel type hydraulic engineering vehicle |
| CN105459992B (en) * | 2015-03-16 | 2018-02-09 | 贵州詹阳动力重工有限公司 | A kind of parking control method and device of wheel type hydraulic engineering truck |
| CN111749956A (en) * | 2020-06-22 | 2020-10-09 | 贵州詹阳动力重工有限公司 | Hydraulic control system for multipurpose wheeled engineering vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090902 |