CN214578791U - Closed-loop parking protection system and engineering machinery - Google Patents
Closed-loop parking protection system and engineering machinery Download PDFInfo
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- CN214578791U CN214578791U CN202120969195.6U CN202120969195U CN214578791U CN 214578791 U CN214578791 U CN 214578791U CN 202120969195 U CN202120969195 U CN 202120969195U CN 214578791 U CN214578791 U CN 214578791U
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Abstract
The utility model discloses a closed loop parking protection system and engineering machine tool, including the parking switch, still include solenoid valve control power and parking solenoid valve, the parking switch is used for being connected or the disconnection between the solenoid valve control power of control and the parking solenoid valve, the parking solenoid valve is used for controlling the pressure of parking oil circuit and parking pressure switch pneumatic cylinder, parking pressure switch one end is connected with gearbox control signal source, the parking pressure switch other end is connected with gearbox controlling means. After the actual parking pressure is established, the parking pressure switch acts, the problem that the parking state is judged only by the parking switch signal under the condition that a transmission controller does not have pressure feedback during actual parking is avoided, and the risk that misjudgment is easily caused due to the fact that the parking switch has faults is reduced. The protection to the gearbox and the whole vehicle is realized.
Description
Technical Field
The utility model relates to a closed loop parking protection system and engineering machine tool.
Background
A parking protection architecture among the prior art, including high frequency electric signal source SIG, parking switch and gearbox controller TCU who establishes ties. When engineering machinery needs to be parked, a parking switch is operated by a machine hand, the parking switch is closed, the transmission controller TCU is connected with the high-frequency electric signal source SIG, the whole vehicle is judged to be in a parking state after the transmission controller TCU receives a high-level signal of the high-frequency electric signal source SIG, the transmission controller TCU controls the transmission to prohibit gear output, and protection of the transmission and the whole vehicle is achieved.
The above technical solution has the following disadvantages: after the parking switch is closed, a high level signal of the whole vehicle is directly output to a Transmission Control Unit (TCU) through the parking switch, and risks of contact arc adhesion and the like exist when the high level signal passes through the parking switch, so that the service life of the switch is shortened or the switch is damaged; the TCU of the gearbox controller only depends on the parking switch signal to judge the parking state, and pressure feedback during actual parking is avoided, so that misjudgment is easily caused if the switch has a fault.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a closed loop parking protection system and engineering machine tool to above problem, improving parking switch's life, reducing because of parking switch has the risk that the trouble caused erroneous judgement easily.
In order to achieve the purpose, the utility model discloses a closed loop parking protection system, including the parking switch, still include solenoid valve control power and parking solenoid valve, the parking switch is used for being connected or the disconnection between the solenoid valve control power of control and the parking solenoid valve, the parking solenoid valve is used for controlling the pressure of parking oil circuit and parking pressure switch pneumatic cylinder, parking pressure switch one end is connected with gearbox control signal source, the parking pressure switch other end is connected with gearbox controlling means. When the engineering machinery needs to be parked, a parking switch is operated by a machine hand, the parking switch is closed, a parking solenoid valve is connected with a solenoid valve control power supply, the parking solenoid valve is started, parking hydraulic oil enters a parking oil path through the parking solenoid valve, parking pressure is built, and the whole vehicle enters a parking state; meanwhile, parking hydraulic oil enters the parking pressure switch hydraulic cylinder through the parking electromagnetic valve, working pressure of the parking pressure switch is set, after parking pressure in the parking oil path is built, the pressure in the parking pressure switch hydraulic cylinder exceeds the set working pressure, the parking pressure switch is closed, the gearbox control device is connected with a gearbox control signal source, the gearbox control device judges that the whole vehicle is in a parking state after receiving signals, and at the moment, the gearbox control device controls the gearbox to prohibit gear output, so that protection of the gearbox and the whole vehicle is achieved. The parking switch is connected with the electromagnetic valve control power supply and is not directly connected with the high-frequency electric signal, so that the problem that the service life of the switch is shortened or damaged due to the fact that contact arcs are adhered when a high level directly passes through the parking switch is solved, and the service life of the parking switch is prolonged; after the actual parking pressure is established, the parking pressure switch acts, the problem that the parking state is judged only by the parking switch signal under the condition that a transmission controller does not have pressure feedback during actual parking is avoided, and the risk that misjudgment is easily caused due to the fact that the parking switch has faults is reduced.
Preferably, the parking device further comprises a parking relay, wherein the solenoid valve control power supply, a coil of the parking relay, a parking switch and a ground wire are connected in series to form a loop; the electromagnetic valve control power supply, the parking relay contact, the parking electromagnetic valve and the ground wire are connected in series to form a loop. During the use, the parking switch is operated to the cell-phone, and the parking switch is closed, and the coil circular telegram work of parking relay attracts the contact closure of parking relay, and the parking solenoid valve is connected with solenoid valve control power, and the parking switch is direct not direct with the high frequency signal of telecommunication lug connection, has avoided the high level to exist contact electric arc adhesion when directly passing through the parking switch and has caused the problem that the switch life-span shortens or damages, improves the life of parking switch.
Preferably, the electromagnetic valve control power supply comprises a cathode of a vehicle power supply BAT. The problem that the service life of the switch is shortened or damaged due to the fact that contact electric arcs are adhered when a high level directly passes through the parking switch is avoided, and the service life of the parking switch is prolonged.
Preferably, the ground wire includes a negative ground GND. The problem that the service life of the switch is shortened or damaged due to the fact that contact electric arcs are adhered when a high level directly passes through the parking switch is avoided, and the service life of the parking switch is prolonged.
Preferably, the gearbox control signal source comprises a high frequency electrical signal source SIG. The structure is mature, and the normal work of the gearbox control device is ensured.
Preferably, the gearbox control means comprises a gearbox controller TCU. The structure is mature, and the normal work of the gearbox is ensured.
Preferably, an oil inlet P of the parking solenoid valve is communicated with an oil tank through an oil pump, an oil return port T of the parking solenoid valve is communicated with the oil tank, a first working oil port a of the parking solenoid valve is communicated with an oil inlet end of a parking oil path, and a second working oil port B of the parking solenoid valve is communicated with an oil outlet end of the parking oil path. When the parking pressure control system is used, the parking electromagnetic valve is started, at the moment, the oil inlet P is connected with the first working oil port A, hydraulic oil enters the parking oil way, parking pressure is built, and the whole vehicle enters a parking state.
Preferably, a first working oil port A of the parking electromagnetic valve is communicated with the oil inlet end of the parking pressure switch hydraulic cylinder, and a second working oil port B of the parking electromagnetic valve is communicated with the oil outlet end of the parking pressure switch hydraulic cylinder. When the parking pressure switch hydraulic cylinder is used, the parking electromagnetic valve is started, at the moment, the oil inlet P is connected with the first working oil port A, hydraulic oil enters the parking pressure switch hydraulic cylinder, and when the pressure in the parking pressure switch hydraulic cylinder exceeds the set working pressure, the parking pressure switch is closed.
Preferably, the parking solenoid valve includes an electromagnetic two-position two-way valve. Simple structure and low cost.
A construction machine comprises the negative control closed-loop parking protection system. The protection to the gearbox and the whole vehicle is realized.
To sum up, the beneficial effects of the utility model reside in that: the parking switch is connected with the electromagnetic valve control power supply and is not directly connected with the high-frequency electric signal, so that the problem that the service life of the switch is shortened or damaged due to the fact that contact arcs are adhered when a high level directly passes through the parking switch is solved, and the service life of the parking switch is prolonged; after the actual parking pressure is established, the parking pressure switch acts, the problem that the parking state is judged only by the parking switch signal under the condition that a transmission controller does not have pressure feedback during actual parking is avoided, and the risk that misjudgment is easily caused due to the fact that the parking switch has faults is reduced. The protection to the gearbox and the whole vehicle is realized.
Drawings
Fig. 1 is a schematic circuit structure diagram of a closed-loop parking protection system of the present invention;
fig. 2 is a schematic diagram of an oil path structure of a closed-loop parking protection system of the present invention;
fig. 3 is a schematic structural diagram of a parking protection structure in the background art.
In the figure: 1. a parking relay; 2. a parking switch; 3. a parking solenoid valve; 4. a parking pressure switch; 5. a parking oil path; 6. an oil pump; 7. and an oil tank.
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.
The invention will be further explained with reference to the drawings and the detailed description below:
as shown in fig. 3, a parking protection structure in the prior art includes a high-frequency electric signal source SIG, a parking switch 2, and a transmission controller TCU connected in series. When the engineering machinery needs to park, the parking switch 2 is operated by a machine hand, the parking switch 2 is closed, the transmission controller TCU is connected with the high-frequency electric signal source SIG, the transmission controller TCU judges that the whole vehicle is in a parking state after receiving a high level signal of the high-frequency electric signal source SIG, and the transmission controller TCU controls the transmission to prohibit gear output at the moment, so that the protection of the transmission and the whole vehicle is realized.
The above technical solution has the following disadvantages: 1. after the parking switch 2 is closed, a high level signal of the whole vehicle is directly output to the transmission controller TCU through the parking switch 2, and risks such as contact arc adhesion exist when the high level passes through the parking switch 2, so that the service life of the switch is shortened or the switch is damaged; 2. the TCU of the gearbox controller only depends on the parking switch signal to judge the parking state, and pressure feedback during actual parking is avoided, so that misjudgment is easily caused if the switch has a fault.
Example 1: as shown in fig. 1 to 2, a closed-loop parking protection system comprises a parking switch 2, and further comprises a solenoid valve control power supply and a parking solenoid valve 3, wherein the parking switch 2 is used for controlling connection or disconnection between the solenoid valve control power supply and the parking solenoid valve 3, the parking solenoid valve 3 is used for controlling pressure of a parking oil path 5 and a parking pressure switch 4 hydraulic cylinder, one end of the parking pressure switch 4 is connected with a transmission control signal source, and the other end of the parking pressure switch 4 is connected with a transmission control device.
When the engineering machinery needs to park, a driver operates the parking switch 2, the parking switch 2 is closed, the parking solenoid valve 3 is connected with the solenoid valve control power supply, the parking solenoid valve 3 is started, parking hydraulic oil enters the parking oil path 5 through the parking solenoid valve 3, parking pressure is built, and the whole vehicle enters a parking state; meanwhile, parking hydraulic oil enters a parking pressure switch 4 hydraulic cylinder through a parking electromagnetic valve 3, working pressure of the parking pressure switch 4 is set, after parking pressure in a parking oil path 5 is built, the pressure in the parking pressure switch 4 hydraulic cylinder exceeds the set working pressure, the parking pressure switch 4 is closed, a gearbox control device is connected with a gearbox control signal source, the gearbox control device judges that the whole vehicle is in a parking state after receiving signals, and at the moment, the gearbox control device controls the gearbox to prohibit gear output, so that protection of the gearbox and the whole vehicle is realized. The parking switch 2 is connected with the electromagnetic valve control power supply and is not directly connected with the high-frequency electric signal, so that the problem that the service life of the switch is shortened or damaged due to the fact that contact arcs are adhered when high electric levels directly pass through the parking switch 2 is solved, and the service life of the parking switch 2 is prolonged; after the actual parking pressure is established, the parking pressure switch 4 acts, the problem that the parking state is judged only by the signal of the parking switch 2 under the condition that a transmission controller does not have pressure feedback during actual parking is avoided, and the risk of misjudgment caused by faults of the parking switch 2 is reduced.
The parking device also comprises a parking relay 1, wherein a solenoid valve control power supply, a coil of the parking relay 1, a parking switch 2 and a ground wire are connected in series to form a loop; the solenoid valve control power supply, the contact of the parking relay 1, the parking solenoid valve 3 and the ground wire are connected in series to form a loop. During the use, the parking switch 2 is operated to the aircraft driver, and parking switch 2 is closed, and parking relay 1's coil circular telegram work attracts parking relay 1's contact closure, and parking solenoid valve 3 is connected with solenoid valve control power, and parking switch 2 is direct not with high frequency electric signal lug connection, has avoided the high level to have contact electric arc adhesion when directly passing through parking switch 2 to cause the problem that the switch life shortens or damages, improves parking switch 2's life.
The electromagnetic valve control power supply comprises a cathode of a vehicle power supply BAT. Which is low level, the ground line comprises a negative ground GND. The problem that the service life of the switch is shortened or damaged due to the fact that contact electric arcs are adhered when the high level directly passes through the parking switch 2 is solved, and the service life of the parking switch 2 is prolonged.
The gearbox control signal source comprises a high-frequency electric signal source SIG. The structure is mature, and the normal work of the gearbox control device is ensured. The gearbox control means comprise a gearbox controller TCU. The structure is mature, and the normal work of the gearbox is ensured.
An oil inlet P of the parking solenoid valve 3 is communicated with an oil tank 7 through an oil pump 6, an oil return port T of the parking solenoid valve 3 is communicated with the oil tank 7, a first working oil port A of the parking solenoid valve 3 is communicated with an oil inlet end of a parking oil path 5, and a second working oil port B of the parking solenoid valve 3 is communicated with an oil outlet end of the parking oil path 5. During the use, start parking solenoid valve 3, at this moment, oil inlet P is connected with first work hydraulic fluid port A, and hydraulic oil gets into parking oil circuit 5, has set up parking pressure, makes whole car get into the parking state. A first working oil port A of the parking electromagnetic valve 3 is communicated with the oil inlet end of the parking pressure switch 4 hydraulic cylinder, and a second working oil port B of the parking electromagnetic valve 3 hydraulic cylinder is communicated with the oil outlet end of the parking pressure switch 4. During the use, start parking solenoid valve 3, at this moment, oil inlet P is connected with first work hydraulic fluid port A, and hydraulic oil gets into parking pressure switch 4 pneumatic cylinder, and when the pressure in parking pressure switch 4 pneumatic cylinder exceeded the operating pressure who sets for, parking pressure switch 4 was closed.
The parking solenoid valve 3 includes an electromagnetic two-position two-way valve. Simple structure and low cost.
Example 2: a work machine, such as a loader, excavator or pile driver, comprising a negative control closed loop parking protection system according to embodiment 1. The parking switch 2 is connected with the electromagnetic valve control power supply and is not directly connected with the high-frequency electric signal, so that the problem that the service life of the switch is shortened or damaged due to the fact that contact arcs are adhered when high electric levels directly pass through the parking switch 2 is solved, and the service life of the parking switch 2 is prolonged; after the actual parking pressure is established, the parking pressure switch 4 acts, the problem that the parking state is judged only by the signal of the parking switch 2 under the condition that a transmission controller does not have pressure feedback during actual parking is avoided, and the risk of misjudgment caused by faults of the parking switch 2 is reduced. The protection to the gearbox and the whole vehicle is realized.
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 utility model provides a closed-loop parking protection system, includes parking switch (2), its characterized in that still includes solenoid valve control power and parking solenoid valve (3), parking switch (2) are used for controlling being connected or breaking off between solenoid valve control power and parking solenoid valve (3), parking solenoid valve (3) are used for controlling the pressure of parking oil circuit (5) and parking pressure switch (4) pneumatic cylinder, parking pressure switch (4) one end is connected with gearbox control signal source, parking pressure switch (4) other end is connected with gearbox controlling means.
2. The closed-loop parking protection system as claimed in claim 1, further comprising a parking relay (1), wherein the solenoid valve controls a power supply, a coil of the parking relay (1), a parking switch (2) and a ground wire to be connected in series to form a loop; the electromagnetic valve control power supply, the contact of the parking relay (1), the parking electromagnetic valve (3) and the ground wire are connected in series to form a loop.
3. A closed loop park protection system as claimed in claim 2, wherein the solenoid valve controlled power supply comprises a vehicle power supply BAT negative pole.
4. A closed-loop parking protection system as claimed in claim 3, characterized in that said ground comprises a negative ground GND.
5. A closed loop park protection system as set forth in claim 1 wherein said transmission control signal source includes a high frequency electrical signal source SIG.
6. A closed loop park protection system as claimed in claim 1, wherein said transmission control means comprises a transmission controller TCU.
7. The closed-loop parking protection system according to any one of claims 1 to 6, wherein an oil inlet P of the parking solenoid valve (3) is communicated with an oil tank (7) through an oil pump (6), an oil return port T of the parking solenoid valve (3) is communicated with the oil tank (7), a first working oil port A of the parking solenoid valve (3) is communicated with an oil inlet end of a parking oil path (5), and a second working oil port B of the parking solenoid valve (3) is communicated with an oil outlet end of the parking oil path (5).
8. The closed-loop parking protection system as claimed in claim 7, wherein a first working oil port A of the parking solenoid valve (3) is communicated with an oil inlet end of a parking pressure switch (4) hydraulic cylinder, and a second working oil port B of the parking solenoid valve (3) is communicated with an oil outlet end of the parking pressure switch (4) hydraulic cylinder.
9. A closed loop parking protection system as claimed in claim 8, characterized in that the parking solenoid valve (3) comprises an electromagnetic two-position two-way valve.
10. A work machine comprising a closed loop park protection system as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120969195.6U CN214578791U (en) | 2021-05-08 | 2021-05-08 | Closed-loop parking protection system and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120969195.6U CN214578791U (en) | 2021-05-08 | 2021-05-08 | Closed-loop parking protection system and engineering machinery |
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| CN214578791U true CN214578791U (en) | 2021-11-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114954412A (en) * | 2022-05-31 | 2022-08-30 | 上海三一重机股份有限公司 | Parking fault detection method, device and system and working machine |
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2021
- 2021-05-08 CN CN202120969195.6U patent/CN214578791U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114954412A (en) * | 2022-05-31 | 2022-08-30 | 上海三一重机股份有限公司 | Parking fault detection method, device and system and working machine |
| CN114954412B (en) * | 2022-05-31 | 2023-08-22 | 上海三一重机股份有限公司 | Parking fault detection method, device and system and working machine |
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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. |