CN210027381U - Normally closed wet braking system and engineering machinery - Google Patents
Normally closed wet braking system and engineering machinery Download PDFInfo
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- CN210027381U CN210027381U CN201920478747.6U CN201920478747U CN210027381U CN 210027381 U CN210027381 U CN 210027381U CN 201920478747 U CN201920478747 U CN 201920478747U CN 210027381 U CN210027381 U CN 210027381U
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Abstract
The utility model discloses a normally closed wet braking system and engineering machinery, which comprises an air compressor, a multifunctional unloading valve, an air cylinder, a parking braking valve, a reverse pedal valve, a booster pump and a shaft end wet brake; the air compressor, the multifunctional unloading valve, the air storage cylinder, the parking brake valve, the reverse pedal valve and the booster pump are sequentially communicated through an air pipe, and the booster pump is communicated with the shaft end wet brake through an oil pipe. The utility model has the advantages of simple structure, safe and reliable, the cost is lower, has fine marketing prospect.
Description
Technical Field
The utility model relates to a normal close formula wet braking system and engineering machine tool belongs to engineering machine tool technical field.
Background
With the increasing importance of the state on the safety and reliability of mining vehicles and engineering machinery, the safety and reliability requirements of brake systems are also increased, the traditional pneumatic oil-jacking dry-type brake system comprises a clamp type brake at two ends of a drive axle and a drum brake on a gearbox, the mining vehicles are easy to generate sparks when working underground, are underground and dangerous, the underground environment is relatively narrow, and the traditional disc brake and the drum brake are insufficient in reliability. In this case, wet brake systems have been the current choice for mine vehicle braking.
There are two types of current wet brake systems: normally open and normally closed.
The normally open type wet brake system comprises normally open type wet brakes (normally in an open state) at two ends of a drive axle and a drum brake on a gearbox; when any pipeline or element in the system has a problem, the whole machine loses the braking function, so that the normally open wet braking system has an inherent safety defect; in addition, the parking brake (also called hand brake) still depends on a drum brake on the gearbox, sparks are still easily generated during working, and the risk still exists underground.
For a normally closed wet brake system, the system comprises normally closed wet brakes (normally in a braking state) at two ends of a drive axle; most of the hydraulic braking systems adopt a full hydraulic braking mode (the structure and the principle can refer to a patent: CN 201720975245.5), a plurality of hydraulic valves, energy accumulators and other elements are needed, the cost is extremely high, the structure is complex, the occupied space of the whole machine is large, and particularly, the system is difficult to arrange by some small-sized engineering machinery; and the brake valve and the liquid filling valve are precise hydraulic elements, the requirement on the cleanliness of hydraulic oil is high, more dust exists underground, air humidity is high, impurities and water are difficult to enter a hydraulic system, the hydraulic valve is easy to block and corrode, and further the whole vehicle brake system fails.
SUMMERY OF THE UTILITY MODEL
The purpose is as follows: in order to overcome the defects in the prior art, the utility model provides a normally closed wet braking system and engineering machinery.
The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a technical scheme does:
a normally closed wet brake system comprises an air compressor, a multifunctional unloading valve, an air storage cylinder, a parking brake valve, a reverse pedal valve, a booster pump and a shaft end (normally closed) wet brake;
the air outlet of the air compressor is communicated with the air inlet of the multifunctional unloading valve, the air outlet of the functional unloading valve is communicated with the air inlet of the air cylinder, the air outlet of the air cylinder is communicated with the air inlet of the parking brake valve, the air outlet of the parking brake valve is communicated with the air inlet of the reverse pedal valve, and the air outlet of the reverse pedal valve is communicated with the air inlet of the booster pump; the oil outlet of the booster pump is communicated with the oil inlet of the shaft end wet brake, the oil is supplied to the shaft end wet brake to relieve braking, and the oil pressure is released to the shaft end wet brake to brake.
Further, the axle end wet brake comprises a front axle end wet brake and a rear axle end wet brake which are arranged at the axle end of the axle.
Furthermore, the booster pump comprises a front booster pump and a rear booster pump, the air outlet of the reverse pedal valve is divided into two paths and is respectively communicated with the front booster pump and the rear booster pump, the oil outlet of the front booster pump is connected with the oil inlet of the wet brake at the end of the front wheel shaft, and the oil outlet of the rear booster pump is connected with the oil inlet of the wet brake at the end of the rear wheel shaft.
Furthermore, a safety valve is arranged on the air cylinder, when the air pressure in the air cylinder reaches an upper limit, the excess air in the air cylinder is discharged through the action of the safety valve, and therefore the constant air pressure in the air cylinder is ensured.
Further, set outside air supply on the gas receiver and connect the mouth, when the unable normal start of engine, the air compressor machine can not be for the gas receiver provides the air supply, and the outside air supply on the accessible gas receiver connects the mouth and inserts outside air supply to ensure this braking system and normally work.
Further, in the normally closed wet brake system, the parking brake valve is an air brake valve. The reverse pedal valve is a reverse air brake pedal.
Further, in the normally closed wet brake system, the shaft end wet brake is a normally closed wet brake.
On the other hand, the utility model also provides an engineering machine tool, including above-mentioned normal close formula wet braking system.
Has the advantages that: the normally closed wet braking system and the engineering machinery provided by the utility model solve the problem that sparks are easy to generate when the traditional gas cap oil dry braking system or the gas cap oil normally open wet braking system works, simplify the structure of parking braking and ensure safer underground use; the problem of the cleanliness of hydraulic oil of a full hydraulic wet brake system is solved, and the hydraulic oil can be used safely under the underground working condition with high dust; the structure is simpler and more reliable, the occupied space of the whole machine is small, and the whole machine is convenient to arrange; the system has low cost, thereby greatly improving the market competitiveness of the whole machine. In addition, because the air storage cylinder is provided with the external air source access port, the brake is released through the external air source under the condition that the power system is out of action, so that the delivery and maintenance of the vehicle are facilitated.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
in the figure: 1 air compressor machine, 2 multi-functional off-load valves, 3 gas receiver: 3.1 safety valve, 3.2 external gas source access port; 4 parking brake valves, 5 reverse pedal valves, 6 booster pumps and 7 shaft end wet brakes.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
As shown in fig. 1, the normally closed wet brake system includes an air compressor 1, a multifunctional unloading valve 2, an air reservoir 3, a parking brake valve 4, a reverse pedal valve 5, a booster pump 6 and a shaft end wet brake 7;
the air compressor 1, the multifunctional unloading valve 2, the air storage cylinder 3, the parking brake valve 4, the reverse pedal valve 5 and the booster pump 6 are sequentially communicated through an air pipe, and the booster pump 6 and the shaft end wet brake 7 are communicated through an oil pipe.
The air outlet of the air compressor 1 is communicated with the air inlet of the multifunctional unloading valve 2, the air outlet of the functional unloading valve 2 is communicated with the air inlet of the air storage cylinder 3, the air outlet of the air storage cylinder 3 is communicated with the air inlet of the parking brake valve 4, the air outlet of the parking brake valve 4 is communicated with the air inlet of the reverse pedal valve 5, and the air outlet of the reverse pedal valve 5 is divided into two paths which are respectively communicated with the air inlets of the booster pumps 6; an oil outlet of the booster pump 6 is communicated with an oil inlet of the shaft end wet brake 7. The shaft end wet brake 7 is supplied with oil to release braking, and the shaft end wet brake 7 is released with oil pressure to perform braking;
the axle end wet brake 7 comprises a front axle end wet brake and a rear axle end wet brake which are arranged at the axle end of the axle.
The booster pump 6 comprises a front booster pump and a rear booster pump, an oil outlet of the front booster pump is connected with an oil inlet of the wet brake at the end of the front wheel shaft, and an oil outlet of the rear booster pump is connected with an oil inlet of the wet brake at the end of the rear wheel shaft.
In some embodiments, as shown in fig. 1, the shaft end wet brake 7 is a normally closed wet brake.
Wherein, axle head wet brake is prior art, and its inner structure and principle can refer to the patent: CN 201720975245.5.
In some embodiments, as shown in fig. 1, a safety valve 3.1 is provided on the air reservoir 3, and when the air pressure in the air reservoir 3 reaches an upper limit, the safety valve 3.1 is actuated to release excess air in the air reservoir, thereby ensuring that the air pressure in the air reservoir 3 is constant.
In some embodiments, as shown in fig. 1, an external air source access port 3.2 is provided on the air reservoir 3, and when the engine cannot be started normally and the air compressor 1 cannot provide air source for the air reservoir 3, an external air source can be accessed through the external air source access port 3.2 on the air reservoir 3, so as to ensure that the brake system works normally.
In some embodiments, as shown in fig. 1, the reverse pedal valve 5 is a reverse air brake pedal. The parking brake valve 4 is an air brake valve.
In another aspect, a construction machine is further provided, and the construction machine comprises the normally closed wet brake system.
The normally closed wet braking system provided by the utility model solves the problem that sparks are easy to generate when the traditional gas cap oil dry braking system or the gas cap oil normally open wet braking system works, simplifies the structure of parking braking, and is safer to use underground; the problem of the cleanliness of hydraulic oil of a full hydraulic wet brake system is solved, and the hydraulic oil can be used safely under the underground working condition with high dust; the structure is simpler and more reliable, the occupied space of the whole machine is small, and the whole machine is convenient to arrange; the system has lower cost, thereby greatly improving the market competitiveness of the whole machine; in addition, because the air storage cylinder is provided with the external air source access port, the brake is released through the external air source under the condition that the power system is out of action, so that the delivery and maintenance of the vehicle are facilitated.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (9)
1. A normally closed wet braking system is characterized by comprising an air compressor, a multifunctional unloading valve, an air storage cylinder, a parking braking valve, a reverse pedal valve, a booster pump and a shaft end wet brake;
the air outlet of the air compressor is communicated with the air inlet of the multifunctional unloading valve, the air outlet of the functional unloading valve is communicated with the air inlet of the air cylinder, the air outlet of the air cylinder is communicated with the air inlet of the parking brake valve, the air outlet of the parking brake valve is communicated with the air inlet of the reverse pedal valve, and the air outlet of the reverse pedal valve is communicated with the air inlet of the booster pump; the oil outlet of the booster pump is communicated with the oil inlet of the shaft end wet brake, the oil is supplied to the shaft end wet brake to relieve braking, and the oil pressure is released to the shaft end wet brake to brake.
2. The normally closed wet brake system according to claim 1, wherein: the axle end wet brake comprises a front axle end wet brake and a rear axle end wet brake which are arranged at the axle end of the axle.
3. The normally closed wet brake system according to claim 2, wherein: the booster pump comprises a front booster pump and a rear booster pump, the air outlet of the reverse pedal valve is divided into two paths which are respectively communicated with the front booster pump and the rear booster pump, the oil outlet of the front booster pump is connected with the oil inlet of the wet brake at the end of the front wheel shaft, and the oil outlet of the rear booster pump is connected with the oil inlet of the wet brake at the end of the rear wheel shaft.
4. The normally closed wet brake system according to claim 1, wherein: the gas cylinder is provided with a safety valve in a matched mode, when the air pressure in the gas cylinder reaches the upper limit, the safety valve acts to release redundant gas in the gas cylinder, and therefore the air pressure in the gas cylinder is guaranteed to be constant.
5. The normally closed wet brake system according to claim 1, wherein: and an external air source access port is arranged on the air storage cylinder.
6. The normally closed wet brake system according to claim 1, wherein: the parking brake valve is an air brake valve.
7. The normally closed wet brake system according to claim 1, wherein: the reverse pedal valve is a reverse air brake pedal.
8. The normally closed wet brake system according to claim 1, wherein: the shaft end wet brake is a normally closed wet brake.
9. A construction machine characterized in that: comprising a normally closed wet brake system according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920478747.6U CN210027381U (en) | 2019-04-10 | 2019-04-10 | Normally closed wet braking system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920478747.6U CN210027381U (en) | 2019-04-10 | 2019-04-10 | Normally closed wet braking system and engineering machinery |
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| Publication Number | Publication Date |
|---|---|
| CN210027381U true CN210027381U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920478747.6U Active CN210027381U (en) | 2019-04-10 | 2019-04-10 | Normally closed wet braking system and engineering machinery |
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| CN (1) | CN210027381U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110065483A (en) * | 2019-04-10 | 2019-07-30 | 徐工集团工程机械股份有限公司科技分公司 | A kind of normally closed type wet brake system |
-
2019
- 2019-04-10 CN CN201920478747.6U patent/CN210027381U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110065483A (en) * | 2019-04-10 | 2019-07-30 | 徐工集团工程机械股份有限公司科技分公司 | A kind of normally closed type wet brake system |
| CN110065483B (en) * | 2019-04-10 | 2023-11-10 | 徐工集团工程机械股份有限公司科技分公司 | Normally closed wet braking system |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220112 Address after: 400000 incubation building, Jiulong Park, high tech Development Zone, Jiulongpo District, Chongqing Patentee after: XCMG CHONGQING ENGINEERING MACHINERY Co.,Ltd. Address before: 221004 No. 99 Kunpeng North Road, Xuzhou Economic Development Zone, Jiangsu Province Patentee before: XCMG CONSTRUCTION MACHINERY Co.,Ltd. SCIENCE AND TECHNOLOGY BRANCH |
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| TR01 | Transfer of patent right |