CN214689439U - Heavy forklift double-loop gas-liquid braking system - Google Patents
Heavy forklift double-loop gas-liquid braking system Download PDFInfo
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- CN214689439U CN214689439U CN202120547693.1U CN202120547693U CN214689439U CN 214689439 U CN214689439 U CN 214689439U CN 202120547693 U CN202120547693 U CN 202120547693U CN 214689439 U CN214689439 U CN 214689439U
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Abstract
The utility model provides a heavy forklift double-loop gas-liquid braking system, the braking system is connected with an air compressor, the braking system comprises a multi-loop protection valve, a double-loop pedal valve, an air force application device and a braking mechanism which are sequentially communicated, and an early warning device for monitoring pressure is also arranged between the air force application valve and the braking mechanism; the multi-loop protection valve is communicated with the air compressor through an air supply pipeline, and an oil-water separator combination valve, an air storage tank and an air pressure switch are sequentially arranged on the air supply pipeline. The utility model discloses a gas-liquid braking system of two return circuits, two the complementary and early warning device through multiloop protective valve, monitoring pressure guarantees the security of fork truck braking system operation, can carry out the early warning to the components and parts that need overhaul, and the security of braking can be guaranteed on the one hand to multiloop protective valve simultaneously, and its surplus gas circuit of on the other hand can also extend and supply other functions of fork truck to use.
Description
Technical Field
The utility model relates to a fork truck braking system technical field, concretely relates to heavy fork truck two return circuits gas-liquid braking system.
Background
The current heavy forklift provided with the gas-liquid comprehensive braking system generally adopts a single-loop system, and under the severe working condition of the heavy forklift, an air booster pump oil seal of the braking system is easy to damage, so that the instant braking failure or the attenuation of the braking performance can be caused, and the following problems and disadvantages are also existed: the brake system booster pump oil seal is damaged, the brake pressure is reduced instantly, and preventive prompt is lacked; after the braking pressure is reduced, the whole vehicle loses the braking function, and the backup braking pressure is not supplemented in time, so that the running safety of the whole vehicle, particularly under the full-load working condition, has larger potential safety hazard; single circuit brake systems also require regular and frequent maintenance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can promote braking security performance and have heavy fork truck gas-liquid braking system of early warning function.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a heavy forklift double-loop gas-liquid braking system is characterized in that an air compressor is connected with the braking system, the braking system comprises a multi-loop protection valve, a double-loop pedal valve, an air force application device and a braking mechanism which are sequentially communicated, and an early warning device for monitoring pressure is further arranged between the air force application valve and the braking mechanism; the multi-loop protection valve is communicated with the air compressor through an air supply pipeline, and an oil-water separator combination valve, an air storage tank and an air pressure switch are sequentially arranged on the air supply pipeline.
Preferably, the multi-circuit protection valve is provided with at least four gas supply lines.
Further, the air booster device comprises a first air booster pump and a second air booster pump which are respectively communicated with the two air outlets of the double-loop pedal valve.
Furthermore, two ends of the early warning device are respectively connected with a shuttle valve of the first air booster pump and the second air booster pump, and a low-pressure warning switch is arranged at the connection position.
Further, the brake mechanism comprises a first caliper disc brake and a second caliper disc brake which are communicated with the shuttle valve air outlet.
According to the technical scheme provided by the utility model, the utility model discloses a gas-liquid braking system in two return circuits, two way complemental and the early warning device through multiloop protection valve, monitoring pressure guarantees the security of fork truck braking system operation, can carry out the early warning to the components and parts that need overhaul, and the security of braking can be guaranteed on the one hand to multiloop protection valve simultaneously, and on the other hand its surplus gas circuit can also extend and supply other functions of fork truck to use.
Drawings
Fig. 1 is a schematic structural connection diagram of the braking system of the present invention;
in the figure: 1. an air compressor; 2. a multi-circuit protection valve; 3. a dual-circuit pedal valve; 4. an air force application device; 41. a first air booster pump; 42. a second air booster pump; 5. a brake mechanism; 51. a first caliper disc brake; 52. a second caliper disc brake; 6. an early warning device; 61. a shuttle valve; 62. a low-voltage alarm switch; 7. an oil-water separator combination valve; 8. a gas storage tank; 9. a pneumatic switch.
Detailed Description
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
The heavy forklift double-loop gas-liquid braking system shown in fig. 1 comprises an air compressor 1, wherein a power input port of the air compressor is connected with a power input port on a forklift engine, the braking system comprises a multi-loop protection valve 2, a double-loop pedal valve 3, an air booster 4 and a braking mechanism 5 which are sequentially connected with an outlet of the air compressor, an early warning device 6 for monitoring pressure is further arranged between the air booster and the braking mechanism, the multi-loop protection valve in the preferred embodiment is provided with four air supply pipelines, the air booster adopts an air booster and comprises a first air booster pump 41 and a second air booster pump 42 which are respectively connected with outlets of double-loop pedals, and the braking mechanism comprises a first caliper disc brake 51 and a second caliper disc brake 52.
In the preferred embodiment, the four-loop protection valve is communicated with the air compressor through an air supply pipeline, the air supply pipeline is sequentially provided with an oil-water separator combination valve 7, an air storage tank 8 and an air pressure switch 9, in specific use, the engine drives the air compressor to work to generate 0.8MPa of compressed air, firstly, water and oil of the compressed air are filtered through the oil-water separator combination valve, the filtered high-pressure air enters the air storage tank, the air pressure switch can display the pressure of the compressed air in real time, then the high-pressure air is divided into four loops through the four-loop protection valve, the air pressures of the four loops of air are not influenced by each other, and the air pressures of other 3 loops are not influenced even if the air pressure is reduced due to air leakage of one loop or other reasons.
Specifically, when a driver steps on the double-loop pedal valve 3, two paths of the four-loop protection valves are communicated with the double-loop pedal valve, and other loops can be used as a standby air path or expanded to be used for other functions of the forklift, such as air supply requirements of tires for inflating and dragging a vehicle; the first air booster pump 41 and the second air booster pump 42 which are respectively connected with the outlets of the double-loop pedal are both composed of an air cylinder and a pump head, the pump head is also called as a hydraulic cylinder body, when the air booster pump works, compressed air is introduced into the air cylinder to act on a cylinder piston with a larger area to form thrust, and then the hydraulic piston with a smaller area in the hydraulic cylinder is pushed to move through the push rod; then, the hydraulic piston transmits the generated hydraulic pressure to a first caliper disc brake 51 and a second caliper disc brake 52 of the brake mechanism, and the caliper piston of the caliper disc brake is pushed, so that the calipers clamp the brake disc to realize vehicle braking.
In order to further ensure the safety performance of the brake system, an early warning device 6 for detecting pressure is further arranged between the air force application mechanism 4 and the brake mechanism 5, the early warning device comprises a shuttle valve 61 and a pressure early warning switch 62, the two ends of the shuttle valve are respectively connected with the first air force application pump 41 and the second air force application pump 42, the pressure early warning switch is arranged at the connected position, the shuttle valve in the preferred embodiment is a valve with a valve body and an actuator which are combined into a whole, the size of the valve is small, the installation is convenient, the corrosion resistance performance is good, and in addition, the particularity of an internal piston structure enables the medium pressure to hardly have more resistance interference on the piston, so that the quick switch is realized, the pressure loss is small, the service life is long, and the maintenance is more convenient.
Specifically, the pressure early warning switch 62 can monitor the brake fluid pressure in the brake fluid cavity at the front part of the air booster pump in real time, if the pressure of the brake fluid cavity at the front part of one of the first air booster pump 41 and the second air booster pump 42 is reduced due to the influence of factors such as aging of a sealing member, the steel ball inside the shuttle valve 61 moves towards the side with the low pressure to seal the path with the reduced pressure, the pressure alarm switch at the corresponding side can give an alarm in real time to prompt that the air booster pump at the corresponding side needs to be overhauled, but as long as one path is in normal operation, the requirement of the brake fluid of the first caliper disc brake 51 and the brake fluid of the second caliper disc brake 52 can be ensured.
The utility model discloses a gas-liquid braking system in two return circuits, two complementary gas-liquid return circuits of way and the security that the early warning device 6 through multiloop protective valve 2, monitoring pressure guaranteed fork truck braking system operation can carry out the early warning to the components and parts that need overhaul, and the security of braking can be guaranteed on the one hand to multiloop protective valve simultaneously, and on the other hand its surplus gas circuit can also extend and supply other functions of fork truck to use.
The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (5)
1. A heavy forklift double-loop gas-liquid braking system is connected with an air compressor (1) and is characterized by comprising a multi-loop protection valve (2), a double-loop pedal valve (3), an air force application device (4) and a braking mechanism (5) which are sequentially communicated, wherein an early warning device (6) for monitoring pressure is further arranged between the air force application valve and the braking mechanism; the multi-loop protection valve is communicated with the air compressor through an air supply pipeline, and an oil-water separator combination valve (7), an air storage tank (8) and an air pressure switch (9) are sequentially arranged on the air supply pipeline.
2. The heavy duty forklift dual-circuit gas-liquid brake system as recited in claim 1, wherein said multi-circuit protection valve is provided with at least four gas supply lines.
3. The dual-circuit pneumatic-hydraulic brake system of claim 1, wherein the air booster includes a first air booster pump and a second air booster pump respectively communicating with the two air outlets of the dual-circuit pedal valve.
4. The heavy forklift double-circuit gas-liquid braking system according to claim 3, wherein two ends of the early warning device are respectively connected with a shuttle valve of the first air booster pump and the second air booster pump, and a low-pressure warning switch is arranged at the connection position.
5. The heavy duty forklift dual-circuit gas-liquid brake system according to claim 4, wherein said brake mechanism comprises a first caliper disc brake and a second caliper disc brake in communication with the shuttle valve outlet port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120547693.1U CN214689439U (en) | 2021-03-16 | 2021-03-16 | Heavy forklift double-loop gas-liquid braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120547693.1U CN214689439U (en) | 2021-03-16 | 2021-03-16 | Heavy forklift double-loop gas-liquid braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214689439U true CN214689439U (en) | 2021-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120547693.1U Active CN214689439U (en) | 2021-03-16 | 2021-03-16 | Heavy forklift double-loop gas-liquid braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214689439U (en) |
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2021
- 2021-03-16 CN CN202120547693.1U patent/CN214689439U/en active Active
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