CN217294497U - Auxiliary braking system for pneumatic braking of loader - Google Patents
Auxiliary braking system for pneumatic braking of loader Download PDFInfo
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- CN217294497U CN217294497U CN202221464824.0U CN202221464824U CN217294497U CN 217294497 U CN217294497 U CN 217294497U CN 202221464824 U CN202221464824 U CN 202221464824U CN 217294497 U CN217294497 U CN 217294497U
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Abstract
The utility model relates to the field of brake systems, in particular to an auxiliary brake system for the air brake of a loader, which comprises an air supply component and an air booster pump, wherein the air supply component and the air booster pump are communicated through a first pipeline and a second pipeline which are arranged in parallel; a foot brake valve is arranged on the first pipeline, an angle sensor is arranged on the foot brake valve, a first control valve and a second control valve which are used for controlling the on-off of the first pipeline are arranged on the first pipeline, and a first pressure sensor which is positioned between the foot brake valve and the second control valve is arranged on the first pipeline; a proportional valve is arranged on the second pipeline, and a third control valve for controlling the on-off of the proportional valve and the air booster pump is arranged on a second pipeline section for communicating the proportional valve and the air booster pump; the angle sensor, the first pressure sensor, the first control valve, the proportional valve, the second control valve and/or the third control valve are/is in communication connection with the controller. The auxiliary brake system for the loader air brake is provided with an auxiliary brake pipeline, so that danger is avoided after a foot brake valve fails.
Description
Technical Field
The utility model relates to a braking system field, concretely relates to loader air braking's auxiliary brake system.
Background
The loader is important technical equipment for basic industry and infrastructure construction service, is one of engineering mechanical equipment with wide application, is widely applied to various fields of national economy, and a service braking system is an important component of the loader, and the quality of the performance of the service braking system is directly related to the safety and the stability of the loader during operation. The service brake of the existing loader is a single brake system, only one air supply pipeline is arranged, if a foot brake valve is damaged, the air supply pipeline cannot be communicated, so that brake failure can be caused, and the system failure is very dangerous when occurring on a ramp.
SUMMERY OF THE UTILITY MODEL
To above defect, the utility model aims at providing a loader air braking's auxiliary brake system aims at solving among the prior art foot brake valve and damages the technical problem that can cause the braking failure.
In order to solve the technical problem, the technical scheme of the utility model is that:
the utility model discloses a loader air braking's auxiliary brake system includes air feed subassembly and air booster pump, and its structural feature is: the air supply assembly is communicated with the air booster pump through a first pipeline and a second pipeline which are arranged in parallel;
a foot brake valve is arranged on the first pipeline, an angle sensor for detecting the angle of the pedal is arranged on the foot brake valve, a first control valve for controlling the on-off state of the first pipeline section for communicating the air supply assembly and the foot brake valve is arranged on the first pipeline section for communicating the foot brake valve and the air booster pump, a second control valve for controlling the on-off state of the second pipeline section for communicating the foot brake valve and the air booster pump is arranged on the first pipeline section, and a first pressure sensor positioned between the foot brake valve and the second control valve is arranged on the first pipeline;
a third control valve for controlling the on-off of the proportional valve is arranged on a second pipeline section for communicating the proportional valve and the air booster pump;
the angle sensor, the first pressure sensor, the first control valve, the proportional valve, the second control valve and/or the third control valve are/is in communication connection with the controller.
Preferably, the pressure-opening curve of the proportional valve corresponds to the opening-pressure curve of the foot brake valve.
Preferably, the first control valve is a first electromagnetic valve, and the first electromagnetic valve is arranged at one end of the first pipeline connected with the air supply assembly.
Preferably, the second control valve is a second electromagnetic valve, the third control valve is a first one-way valve, and the second electromagnetic valve is electrically connected with the controller.
Preferably, the second control valve is a second electromagnetic valve, the third control valve is a third electromagnetic valve, and the second electromagnetic valve and the third electromagnetic valve are both electrically connected with the controller.
Preferably, the second control valve is a second one-way valve, the third control valve is a fourth electromagnetic valve, a fifth electromagnetic valve is arranged at one end of the second pipeline connected with the air supply assembly, and the fourth electromagnetic valve and the fifth electromagnetic valve are both electrically connected with the controller.
Preferably, the air supply assembly comprises an air compressor, an air dryer and an air storage cylinder which are connected in sequence.
Preferably, an air inlet main pipe is installed at the air outlet end of the air storage cylinder, and the air inlet main pipe is connected with the air inlet ends of the first pipeline and the second pipeline through a three-way joint.
Preferably, the air booster pump is provided with an air outlet main pipe communicated to the air chamber of the air booster pump, and the air outlet main pipe is connected with the air outlet ends of the first pipeline and the second pipeline through a three-way joint.
Preferably, one end of the second pipeline connected with the air booster pump is provided with a second pressure sensor
After the technical scheme is adopted, the beneficial effects of the utility model are that:
through set up angle sensor and pressure sensor on the foot brake valve, and connect a proportional valve in parallel on the foot brake valve, and under angle sensor and pressure sensor's cooperation, judge whether the foot brake valve damages, thereby whether abandon the foot brake valve, change into the proportional valve, the proportional valve can replace the foot brake valve to adjust the gas pressure and the flow that supply with the air booster pump, make this scheme possess supplementary brake pipe way, avoid because of the foot brake valve inefficacy back, take place dangerously.
Drawings
Fig. 1 is a schematic diagram of a first embodiment of the present invention;
fig. 2 is a schematic circuit diagram according to a first embodiment of the present invention;
fig. 3 is a schematic flow chart according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of a second embodiment of the present invention;
fig. 5 is a schematic diagram of a third embodiment of the present invention.
In the figure: 1. a gas supply assembly; 10. an air compressor; 11. an air dryer; 12. an air cylinder; 2. an air booster pump; 3. a first pipeline; 30. a first pressure sensor; 31. a first solenoid valve; 32. a second solenoid valve; 33. a second check valve; 4. a second pipeline; 40. a proportional solenoid valve; 41. a first check valve; 42. a second pressure sensor; 43. a third electromagnetic valve; 44. a fourth solenoid valve; 45. a fifth solenoid valve; 5. a foot brake valve; 50. an angle sensor; 6. a three-way joint; 7. a controller; 8. and a brake lamp.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1, 2 and 3, the auxiliary braking system for the air brake of the loader comprises an air supply assembly 1, an air booster pump 2 and a controller 7, wherein the air supply assembly 1 is used for providing gas with preset pressure, the air supply assembly 1 comprises an air compressor 10, an air dryer 11 and an air storage cylinder 12 which are sequentially connected, the air compressor 10 is used for outputting compressed gas, the air dryer 11 is used for drying the output compressed gas, the air storage cylinder 12 is used for storing the dried compressed gas and supplying the compressed gas to the air booster pump 2, the compressed gas entering a gas chamber of the air booster pump 2 is used as a power source to push a piston in the cylinder, the cylinder piston is moved through the transmission of a push rod, so that the pressure of brake fluid is increased, and then the brake fluid is transmitted to a brake caliper to achieve a braking effect.
A foot brake valve 5 is arranged on the first pipeline 3, the foot brake valve 5 is used for controlling connection and disconnection of the air supply component 1 and the air booster pump 2, an angle sensor 50 for detecting the angle of the pedal is arranged on the foot brake valve 5, the structure and function of the foot brake valve 5 and the pedal thereof are common knowledge which should be known by a person skilled in the art, and details are not repeated herein, a first control valve for controlling connection and disconnection of the foot brake valve 5 and the air supply component 1 is arranged on a first pipeline section for connecting the air supply component 1 and the foot brake valve 5, the first control valve is a first electromagnetic valve 31, the first electromagnetic valve 31 is arranged at one end of the first pipeline 3 connected with the air supply component 1, the first electromagnetic valve 31 is used for cutting off the first pipeline 3 after the foot brake valve 5 is damaged, compressed air is supplied to the air booster pump 2 through the second pipeline 4, when the power is not powered, the first electromagnetic valve 31 is in an open state, and the first electromagnetic valve 31 is powered on after the foot brake valve 5 is damaged, in the closed state, the first line 3 is shut off.
A second control valve for controlling the on-off of the foot brake valve 5 is arranged on a first pipeline section for communicating the foot brake valve 5 with the air booster pump 2, the second control valve is a second electromagnetic valve 32 in the embodiment, the second electromagnetic valve 32 is electrically connected with the controller 7, the first pressure sensor 30 is arranged between the foot brake valve 5 and the second electromagnetic valve 32, when the foot brake valve 5 is not electrified, the second electromagnetic valve 32 is in an open state, after the foot brake valve 5 is damaged, the second electromagnetic valve 32 is electrified and is in a closed state, the connecting end of the first pipeline 3 and the air booster pump 2 is cut off, after braking is finished, a pedal of the foot brake valve 5 is released, the controller 7 is used for cutting off the power of the second electromagnetic valve 32, the second electromagnetic valve 32 is in an open state, and the air of the air booster pump 2 is exhausted through the left position of the foot brake valve 5, so that the vehicle continues to run.
A first pressure sensor 30 is arranged on the first line 3 between the foot brake valve 5 and the second control valve, the first pressure sensor 30 being used to detect the gas pressure through the foot brake valve 5.
The second pipeline 4 is provided with a proportional valve which is a proportional solenoid valve 40, preferably, the pressure-opening curve of the proportional solenoid valve 40 is consistent with the opening-pressure curve of the foot brake valve 5, the proportional valve can simulate the foot brake valve 5 to regulate the pressure and flow of gas according to the numerical value of the angle sensor 50, after the foot brake valve 5 is damaged, the proportional solenoid valve 40 can replace the foot brake valve 5, the pressure and flow of the compressed gas are continuously and proportionally controlled according to the input electric signal, when the proportional solenoid valve 40 is not electrified, the proportional solenoid valve 40 is in a closing state, the second pipeline 4 is cut off, after the foot brake valve 5 is damaged, the proportional solenoid valve 40 is in an opening state and communicated with the second pipeline 4, and the compressed gas enters the gas cavity of the air booster pump 2 after being regulated by the proportional solenoid valve 40 to brake.
A third control valve for controlling the on-off of the proportional valve and the air booster pump 2 is arranged on a second pipeline section for communicating the proportional valve and the air booster pump 2, the third control valve is a first one-way valve 41 in the embodiment, and the first one-way valve 41 enables the air to flow to the air booster pump 2 from the first pipeline 3 only and can not flow to the first pipeline 3 from the air booster pump 2.
The angle sensor 50, the first pressure sensor 30, the first control valve, the proportional valve, the second control valve and/or the third control valve are/is connected in communication with the controller 7.
The controller 7 is electrically connected with an instrument and a brake lamp 8, the instrument is used for displaying a data signal output by the controller 7, the brake lamp 8 is lightened when the loader brakes, a rear vehicle is reminded, the instrument or the controller 7 can work and time in a normal state, after the loader brakes for a period of time, the instrument can prompt a driver to perform periodic detection on the foot brake valve 5, and the vehicle can be stopped during detection.
When the vehicle is in a normal driving state, the first electromagnetic valve 31, the second electromagnetic valve 32 and the proportional electromagnetic valve 40 are all in a non-energized state, when the vehicle is braked during running, the foot brake valve 5 is stepped, the foot brake valve 5 is reversed to a right position, the pressure of gas passing through the foot brake valve 5 changes along with the stepping depth, the first one-way valve 41 prevents compressed gas from being shunted into the second pipeline 4, the compressed gas is prevented from leaking from the proportional electromagnetic valve 40, the first pressure sensor 30 detects the pressure change and feeds back a signal to the controller 7, the first electromagnetic valve 31, the second electromagnetic valve 32 and the proportional electromagnetic valve 40 are all not energized, the controller 7 collects the signals of the first pressure sensor 30 and the angle sensor 50, the braking intention of a driver at the moment is judged, and the controller 7 outputs a signal to electrically turn on the brake lamp 8; when the foot brake valve 5 is released, the air of the air booster pump 2 is exhausted through the left position of the foot brake valve 5, so that the vehicle continues to run.
After the foot brake valve 5 is damaged, when a vehicle runs to brake, a valve core of the foot brake valve 5 cannot normally move, the first pressure sensor 30 detects that the pressure change at the rear end of the foot brake valve 5 is abnormal, the controller 7 judges that the foot brake valve 5 cannot normally work at the moment through the first pressure sensor 30 and the angle sensor 50, judges that the foot brake valve 5 is damaged, the controller 7 energizes the proportional electromagnetic valve 40 to start the auxiliary brake system, energizes the first electromagnetic valve 31 and the second electromagnetic valve 32 to cut off the gas path of the foot brake valve 5 to prevent gas from leaking from the foot brake valve 5, and simultaneously transmits a fault signal of the foot brake valve 5 to an instrument by the controller 7, and the instrument displays that the foot brake valve 5 is in fault to remind a driver of overhauling the foot brake valve 5; when the foot brake valve 5 is released, the second electromagnetic valve 32 is powered off, the foot brake valve 5 and the air booster pump 2 are communicated, and the air of the air booster pump 2 is exhausted through the left position of the foot brake valve 5, so that the vehicle continues to run.
Preferably, one end of the second pipeline 4 connected with the air booster pump 2 is provided with a second pressure sensor 42, the second pressure sensor 42 is arranged between the first one-way valve 41 and the proportional solenoid valve 40, the second pressure sensor 42 is used for detecting the gas pressure passing through the proportional valve, when the foot brake valve 5 is damaged, the first pipeline 3 is cut off, the second pipeline 4 is opened, the proportional solenoid valve 40 is electrified and transmits the compressed gas to the air booster pump 2, when the second pressure sensor 42 detects that the pressure change at the rear end of the proportional solenoid valve 40 is abnormal, the controller 7 transmits a fault signal of the proportional solenoid valve 40 to the instrument, and the instrument displays that the proportional solenoid valve 40 is in fault, so as to remind a driver of overhauling the proportional solenoid valve 40.
Through set up angle sensor 50 and pressure sensor on foot brake valve 5, and parallelly connected a proportional valve on foot brake valve 5, and under angle sensor 50 and pressure sensor's cooperation, judge whether foot brake valve 5 damages, thereby whether abandon foot brake valve 5, change to the proportional valve, the proportional valve can replace foot brake valve 5 to adjust the gas pressure and the flow of supplying with air thrust augmentation pump 2, make this scheme possess auxiliary brake pipe way, avoid because of the foot brake valve 5 after losing efficacy, take place danger.
Example two:
as shown in fig. 4, the present embodiment is different from the first embodiment in that: in this embodiment, the third control valve is set as a third electromagnetic valve 43, the third electromagnetic valves 43 are all electrically connected with the controller 7, when the foot brake valve 5 works normally, the second electromagnetic valve 32 is in an open state, the third electromagnetic valve 43 is in a closed state, after the foot brake valve 5 is damaged, the second electromagnetic valve 32 is electrified and is in a closed state, the connection between the foot brake valve 5 and the air booster pump 2 is cut off, gas is prevented from leaking from the foot brake valve 5, the third electromagnetic valve 43 is electrified and is in an open state, the second pipeline 4 is communicated, after braking is finished, the pedal of the foot brake valve 5 is released, the angle sensor 50 transmits a signal to the controller 7, and the gas of the air booster pump 2 is exhausted through the left position of the proportional electromagnetic valve 40, so that the vehicle continues to run.
Example three:
as shown in fig. 5, the present embodiment is different from the first embodiment in that: in this embodiment, the second control valve is set as a second check valve 33, the second check valve 33 enables gas to flow only from the second pipeline 4 to the air booster pump 2 and not from the air booster pump 2 to the second pipeline 4, the third control valve is set as a fourth electromagnetic valve 44, a fifth electromagnetic valve 45 is arranged at one end of the second pipeline 4, which is connected with the air supply assembly 1, and both the fourth electromagnetic valve 44 and the fifth electromagnetic valve 45 are electrically connected with the controller 7.
When the foot brake valve 5 normally works, the fourth electromagnetic valve 44 and the fifth electromagnetic valve 45 are both in a closed state, two ends of the second pipeline 4 are cut off, after the foot brake valve 5 is damaged, the fourth electromagnetic valve 44 and the fifth electromagnetic valve 45 are electrified and are in an open state, the second pipeline 4 and the air booster pump 2 are communicated, the second one-way valve 33 blocks the air in the second pipeline 4 from flowing to the foot brake valve 5, the air is prevented from leaking from the foot brake valve 5, after braking is finished, a pedal of the foot brake valve 5 is loosened, the angle sensor 50 transmits a signal to the controller 7, the air of the air booster pump 2 enters the second pipeline 4, air is exhausted through the left position of the proportional electromagnetic valve 40, and the vehicle continues to run.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. An auxiliary braking system for air braking of a loader comprises an air supply assembly (1) and an air booster pump (2), and is characterized in that the air supply assembly (1) and the air booster pump (2) are communicated through a first pipeline (3) and a second pipeline (4) which are arranged in parallel;
a foot brake valve (5) is arranged on the first pipeline (3), an angle sensor (50) for detecting the pedal angle is arranged on the foot brake valve (5), a first pipeline section for communicating the air supply assembly (1) with the foot brake valve (5) is provided with a first control valve for controlling the on-off of the first control valve, a first pipeline section for communicating the foot brake valve (5) with the air booster pump (2) is provided with a second control valve for controlling the on-off of the first control valve, and a first pressure sensor (30) positioned between the foot brake valve (5) and the second control valve is arranged on the first pipeline (3);
a proportional valve is arranged on the second pipeline (4), and a third control valve for controlling the on-off of the proportional valve is arranged on a second pipeline section for communicating the proportional valve with the air booster pump (2);
the angle sensor (50), the first pressure sensor (30), the first control valve, the proportional valve, the second control valve and/or the third control valve are in communication connection with a controller (7).
2. Auxiliary braking system for pneumatic loader braking according to claim 1, characterized in that the pressure-opening curve of the proportional valve coincides with the opening-pressure curve of the foot brake valve (5).
3. Auxiliary braking system for pneumatic braking of a loader as claimed in claim 1, characterized in that said first control valve is a first solenoid valve (31), said first solenoid valve (31) being arranged at the end of the first conduit (3) connected to said air supply assembly (1).
4. Auxiliary braking system for pneumatic braking of a loader as in claim 3, characterized in that said second control valve is a second solenoid valve (32) and said third control valve is a first non-return valve (41), said second solenoid valve (32) being electrically connected to said controller (7).
5. Auxiliary braking system for pneumatic braking of a loader as in claim 3, characterized in that said second control valve is a second solenoid valve (32) and said third control valve is a third solenoid valve (43), said second solenoid valve (32) and said third solenoid valve (43) being electrically connected to said controller (7).
6. The auxiliary braking system for the pneumatic brake of the loader as recited in claim 3, characterized in that the second control valve is a second one-way valve (33), the third control valve is a fourth solenoid valve (44), a fifth solenoid valve (45) is provided at the end of the second pipeline (4) connected to the air supply assembly (1), and the fourth solenoid valve (44) and the fifth solenoid valve (45) are both electrically connected to the controller (7).
7. Auxiliary braking system for pneumatic braking of a loader as in any of claims 1 to 6, characterized in that the air supply assembly (1) comprises an air compressor (10), an air dryer (11) and an air reservoir (12) connected in series.
8. Auxiliary braking system for air braking of a loader as per claim 7, characterized in that the air outlet end of the air reservoir (12) is fitted with an air inlet main pipe, which connects the air inlet ends of the first (3) and second (4) pipelines by means of a three-way joint (6).
9. Auxiliary braking system for loader air braking according to claim 7, characterized in that the air booster pump (2) is equipped with a main air outlet pipe connected to its air chamber, the main air outlet pipe connects the air outlet ends of the first pipeline (3) and the second pipeline (4) through a three-way joint (6).
10. Auxiliary braking system for pneumatic loader braking according to claim 1, characterised in that the end of the second line (4) connected to the air booster pump (2) is provided with a second pressure sensor (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221464824.0U CN217294497U (en) | 2022-06-13 | 2022-06-13 | Auxiliary braking system for pneumatic braking of loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221464824.0U CN217294497U (en) | 2022-06-13 | 2022-06-13 | Auxiliary braking system for pneumatic braking of loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217294497U true CN217294497U (en) | 2022-08-26 |
Family
ID=82919798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221464824.0U Active CN217294497U (en) | 2022-06-13 | 2022-06-13 | Auxiliary braking system for pneumatic braking of loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217294497U (en) |
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2022
- 2022-06-13 CN CN202221464824.0U patent/CN217294497U/en active Active
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Address after: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee after: Lovol Heavy Industry Group Co.,Ltd. Address before: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee before: LOVOL Engineering Machinery Group Co.,Ltd. |