CN214775841U - Parking braking control circuit - Google Patents
Parking braking control circuit Download PDFInfo
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- CN214775841U CN214775841U CN202120374628.3U CN202120374628U CN214775841U CN 214775841 U CN214775841 U CN 214775841U CN 202120374628 U CN202120374628 U CN 202120374628U CN 214775841 U CN214775841 U CN 214775841U
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- parking brake
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- relay
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Abstract
The utility model discloses a parking braking control circuit, it is including the parking solenoid valve that inserts the parking braking pipeline, parking solenoid valve's coil one end ground connection, the power is connected to one end, parking braking relay's control switch inserts the circuit between parking solenoid valve and the power, power and ground connection are connected respectively to parking braking relay's coil both ends, install parking braking switch between parking braking relay's coil and the power, install pressure switch on the parking braking pipeline, pressure switch is located the parking braking pipeline that is connected with parking solenoid valve oil circuit output, pressure switch one end inserts the power, the coil of parking pilot lamp relay is connected to the other end, parking braking pilot lamp is connected to parking pilot lamp relay's control switch, parking pilot lamp relay's control switch and the equal ground connection of coil. The parking indicating lamp in the control circuit can directly reflect the working state of the parking electromagnetic valve, and the driving safety is ensured.
Description
Technical Field
The utility model relates to an electrical equipment field, specific parking braking control circuit that says so.
Background
The parking brake system is a very important control system on the loader, the parking brake control system needs to be capable of correctly indicating the parking state and feeding back the state of the parking brake, referring to fig. 2, now a parking brake indicator lamp of the loader is given to a display by a parking brake switch to show the parking state at the moment, however, the state of a control switch of the parking brake switch cannot reflect the state of a parking brake solenoid valve and the parking brake.
The prior art has the following disadvantages: if the parking brake solenoid valve breaks down, when the parking brake switch is closed, the instrument displays a parking state, but the parking brake indicator lamp cannot correctly indicate the parking brake state because the parking brake solenoid valve does not make the whole vehicle enter the parking state; when the parking braking switch is disconnected, the instrument parking indicating lamp goes out, the parking state should be removed, but the parking state is not removed from the whole automobile due to the failure of the parking braking electromagnetic valve, the whole automobile cannot be moved by the gear shifting driving at the moment, and the parking braking indicating lamp cannot correctly indicate the parking braking state.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above problem provide a parking braking control circuit, whole car parking braking state of instruction that can be correct promotes the security performance of vehicle.
In order to achieve the above object, the utility model discloses a parking brake control circuit, this parking brake control circuit includes parking brake switch, parking brake relay, parking pilot lamp relay and insert the parking solenoid valve of parking brake pipeline, parking solenoid valve's coil one end ground connection, the power is connected to one end, parking brake relay's control switch inserts the circuit that is located between parking solenoid valve and the power, power and ground connection are connected respectively to parking brake relay's coil both ends, install parking brake switch on the circuit between parking brake relay's coil and the power, its structural feature is: the parking brake device is characterized in that a pressure switch is installed on the parking brake pipeline and located on the parking brake pipeline connected with the output end of the parking electromagnetic valve oil way, one end of the pressure switch is connected with a power supply, the other end of the pressure switch is connected with a coil of a parking indicator lamp relay, a control switch of the parking indicator lamp relay is connected with a parking brake indicator lamp, and the control switch and the coil of the parking indicator lamp relay are all grounded. When the parking brake switch is switched off, no electric signal is sent from the coil end of the parking brake relay, the contact of the parking brake relay is in a switch-on state, the parking solenoid valve is electrified, the parking brake pipe is switched on at the moment, the parking brake is pushed to enable the parking brake to be in a switch-off state, the vehicle can be driven, the pressure switch at the rear end of the parking solenoid valve detects high pressure, the pressure switch is in a switch-off state, the parking brake indicator lamp relay is not attracted, the signal fed back to the instrument is the parking brake switch-off state, and the instrument parking brake indicator lamp is not on. When the parking brake switch is switched on, a parking brake relay coil is electrified, a contact of the parking brake relay is disconnected, the parking solenoid valve is disconnected in a power-off mode, a parking brake pipeline is cut off, the parking brake does not have air pressure or oil pressure to push the parking brake, the whole automobile is in a parking state at the moment, meanwhile, the pressure switch detects a low-pressure state of the parking brake pipeline at the rear end of the parking brake solenoid valve, the pressure switch is switched on in a closed mode, the parking brake indicator lamp relay is attracted, a low-level signal is given to an instrument, the instrument parking indicator lamp is on, and the parking state of the whole automobile is displayed. By adopting the control circuit, the pressure in the parking brake pipeline at the rear end of the parking brake solenoid valve is monitored through the pressure switch, so that the on-off state of the parking brake solenoid valve is fed back, the on-off state of the parking brake valve is indicated to indicate the parking state of the whole vehicle through the instrument, the working state of the parking brake solenoid valve can be directly reflected by the parking brake indicator lamp, and a driver can accurately obtain the working state of the vehicle and ensure the driving safety.
Regarding the grounding structure of parking solenoid valve, parking brake relay and parking pilot lamp relay, ground connection is for being connected with the casing of loader, and parking solenoid valve, parking brake relay and parking pilot lamp relay form closed circuit through the casing of connecting the loader.
In order to avoid unexpected conditions such as short circuit and the like of a circuit, a circuit breaker with rated current of 5A is connected in series on a circuit connecting a pressure switch and a parking brake relay with a power supply. The pressure switch and the parking brake relay are connected with the circuit breaker firstly and then connected with the power supply, and the circuit breaker carries out overload protection on the circuit of the pressure switch and the parking brake relay.
Preferably, the parking brake switch is a normally open switch. When the parking brake switch is installed, the parking brake switch is connected to the normally open contact.
Preferably, the control switch of the parking brake relay is a normally closed switch. The parking brake relay is connected to the normally closed contact when installed.
Preferably, the pressure switch is a normally open switch. The pressure switch is connected to the normally closed contact when installed.
Regarding the state of the parking indicator light relay, the control switch of the parking indicator light relay is a normally open switch.
Regarding the installation mode of the pressure switch, the pressure switch is installed on the parking brake pipeline through a tee pipe fitting. Two ports of the three-way pipe are communicated with the parking brake pipeline, and the pressure switch is arranged on the rest port of the three-way pipe.
To sum up, the beneficial effects of the utility model reside in that: the control circuit utilizes the pressure switch to monitor the pressure in the parking brake pipeline at the rear end of the parking brake solenoid valve and feed back the on-off state of the parking brake solenoid valve, the on-off state of the parking brake valve is indicated to the instrument to indicate the parking state of the whole vehicle, the parking indicator lamp can directly reflect the working state of the parking solenoid valve, and a driver can accurately obtain the working state of the vehicle to ensure the driving safety.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of the prior art.
In the figure: 1. a parking indicator light relay; 2. a parking brake switch; 3. a parking brake relay; 4. a parking solenoid valve; 5. a parking brake pipe; 6. a pressure switch; 7. parking brake indicator 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 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.
Referring to the attached figure 1, the utility model discloses a parking brake control circuit, which comprises a parking brake switch 2, a parking brake relay 3, a parking indicator light relay 1 and a parking solenoid valve 4 connected to a parking brake pipeline 5, wherein one end of a coil of the parking solenoid valve 4 is grounded, and the other end is connected to a power supply, the control switch of the parking brake relay 3 is connected to a circuit between the parking solenoid valve 4 and the power supply, two ends of the coil of the parking brake relay 3 are respectively connected to the power supply and the ground, the parking brake switch 2 is arranged on the circuit between the coil of the parking brake relay 3 and the power supply, a pressure switch 6 is arranged on the parking brake pipeline 5, the pressure switch 6 is arranged on the parking brake pipeline 5 connected to the oil output end of the parking solenoid valve 4, one end of the pressure switch 6 is connected to the power supply, and the other end is connected to the coil of the parking indicator light relay 1, the control switch of the parking indicator light relay 1 is connected with the parking brake indicator light 7, and the control switch and the coil of the parking indicator light relay 1 are both grounded. When the parking brake switch 2 is switched off, no electric signal is sent to the coil end of the parking brake relay 3, the contact of the parking brake relay 3 is in a switch-on state, the parking electromagnetic valve 4 is electrified, the parking brake pipeline 5 is switched on at the moment, the parking brake is pushed to enable the parking brake to be in a switch-off state, a vehicle can run, the pressure switch 6 at the rear end of the parking electromagnetic valve 4 detects high pressure, the pressure switch 6 is in a switch-off state, the parking brake indicator lamp 7 is not sucked, the signal fed back to the instrument is the parking brake switch-off state, and the instrument parking brake indicator lamp 7 is not on. When the parking brake switch 2 is switched on, the coil of the parking brake relay 3 is electrified, the contact of the parking brake relay 3 is disconnected, the parking electromagnetic valve 4 is disconnected after power is lost, the parking brake pipeline 5 is cut off, the parking brake does not have air pressure or oil pressure to push the parking brake, the whole automobile is in a parking state at the moment, meanwhile, the pressure switch 6 detects the low-voltage state of the parking brake pipeline 5 at the rear end of the parking electromagnetic valve 4, the pressure switch 6 is switched on in a closed mode, the parking brake indicator lamp 7 is actuated by the relay to give a low-level signal of an instrument, the parking indicator lamp of the instrument is on, and the parking state of the whole automobile is displayed. By adopting the control circuit, the pressure in the parking brake pipeline 5 at the rear end of the parking brake electromagnetic valve is monitored through the pressure switch 6, so that the on-off state of the parking brake electromagnetic valve is fed back, the on-off state of the parking brake valve is indicated to indicate the parking state of the whole vehicle through an instrument, the working state of the parking brake electromagnetic valve 4 can be directly reflected by the parking brake indicating lamp 7, a driver can accurately obtain the working state of the vehicle, and the driving safety is ensured.
Referring to fig. 1, regarding the grounding structure of the parking solenoid valve 4, the parking brake relay 3, and the parking indicator relay 1, the grounding is connected to the casing of the loader, and the parking solenoid valve 4, the parking brake relay 3, and the parking indicator relay 1 form a closed loop by being connected to the casing of the loader.
In order to avoid unexpected situations such as short circuit of the circuit, a circuit breaker with rated current of 5A is connected in series with a circuit of the pressure switch 6 and the parking brake relay 3 which is connected with a power supply. The pressure switch 6 and the parking brake relay 3 are connected with the circuit breaker firstly and then connected with a power supply, and the circuit breaker carries out overload protection on the circuit of the pressure switch 6 and the parking brake relay 3.
In an embodiment of the present invention, the parking brake switch 2 is a normally open switch. The parking brake switch 2 is connected to a normally open contact when installed. The control switch of the parking brake relay 3 is a normally closed switch. The parking brake relay 3 is connected to a normally closed contact when installed. The pressure switch 6 is a normally open switch. The pressure switch 6 is mounted to be connected to the normally closed contact. Regarding the state of the parking indicator relay 1, the control switch of the parking indicator relay 1 is a normally open switch.
In an embodiment of the present invention, the pressure switch 6 is installed on the parking brake pipe 5 through a tee pipe fitting. Two ports of the three-way pipe fitting are communicated with a parking brake pipeline 5, and a pressure switch 6 is arranged on the rest port of the three-way pipe fitting.
In other embodiments of the present invention, the pressure switch 6 can also be directly installed on the parking brake pipeline 5, such as by drilling the parking brake pipeline 5, and welding the pressure switch 6 to the parking brake pipeline 5.
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. The parking brake control circuit comprises a parking brake switch (2), a parking brake relay (3), a parking indicator lamp relay (1) and a parking electromagnetic valve (4) connected into a parking brake pipeline (5), wherein one end of a coil of the parking electromagnetic valve (4) is grounded, one end of the coil is connected with a power supply, a control switch of the parking brake relay (3) is connected with a circuit between the parking electromagnetic valve (4) and the power supply, two ends of the coil of the parking brake relay (3) are respectively connected with the power supply and the ground, and the parking brake switch (2) is installed on the circuit between the coil of the parking brake relay (3) and the power supply, and is characterized in that a pressure switch (6) is installed on the parking brake pipeline (5), the pressure switch (6) is located on the parking brake pipeline (5) connected with the oil circuit output end of the parking electromagnetic valve (4), one end of the pressure switch (6) is connected with the power supply, The other end of the parking brake indicator lamp is connected with a coil of the parking indicator lamp relay (1), a control switch of the parking indicator lamp relay (1) is connected with a parking brake indicator lamp (7), and the control switch and the coil of the parking indicator lamp relay (1) are grounded.
2. The parking brake control circuit of claim 1, wherein the ground is connected to a housing of the loader.
3. Parking brake control circuit according to claim 1, characterized in that the pressure switch (6) and the parking brake relay (3) are circuit breakers connected in series on the line connecting the power supply.
4. Parking brake control circuit according to claim 3, characterized in that the rated current of the circuit breaker is 5A.
5. Parking brake control circuit according to claim 1, characterized in that the parking brake switch (2) is a normally open switch.
6. Parking brake control circuit according to claim 1, characterized in that the control switch of the parking brake relay (3) is a normally closed switch.
7. Parking brake control circuit according to claim 1, characterized in that the pressure switch (6) is a normally open switch.
8. Parking brake control circuit according to claim 1, characterized in that the control switch of the parking indicator relay (1) is a normally open switch.
9. Parking brake control circuit according to claim 1, characterized in that the pressure switch (6) is mounted on the parking brake line (5) by means of a tee fitting.
10. Parking brake control circuit according to claim 9, characterized in that the tee fitting has two ports communicating with the parking brake line (5) and the pressure switch (6) is mounted on the remaining one port of the tee fitting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120374628.3U CN214775841U (en) | 2021-02-18 | 2021-02-18 | Parking braking control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120374628.3U CN214775841U (en) | 2021-02-18 | 2021-02-18 | Parking braking control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214775841U true CN214775841U (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120374628.3U Active CN214775841U (en) | 2021-02-18 | 2021-02-18 | Parking braking control circuit |
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| Country | Link |
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| CN (1) | CN214775841U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114987419A (en) * | 2022-07-13 | 2022-09-02 | 北京福田戴姆勒汽车有限公司 | Solenoid valve, parking braking system and vehicle |
-
2021
- 2021-02-18 CN CN202120374628.3U patent/CN214775841U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114987419A (en) * | 2022-07-13 | 2022-09-02 | 北京福田戴姆勒汽车有限公司 | Solenoid valve, parking braking system and vehicle |
| CN114987419B (en) * | 2022-07-13 | 2023-03-14 | 北京福田戴姆勒汽车有限公司 | Solenoid valve, parking braking system and vehicle |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
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. |
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| CP01 | Change in the name or title of a patent holder |