CN108679217B - Electric control system for gearbox of backhoe loader - Google Patents
Electric control system for gearbox of backhoe loader Download PDFInfo
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- CN108679217B CN108679217B CN201810670531.XA CN201810670531A CN108679217B CN 108679217 B CN108679217 B CN 108679217B CN 201810670531 A CN201810670531 A CN 201810670531A CN 108679217 B CN108679217 B CN 108679217B
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- Prior art keywords
- gear
- solenoid valve
- control system
- time delay
- delay relay
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0206—Layout of electro-hydraulic control circuits, e.g. arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses an electric control system for a gearbox of a loader-digger, belonging to the field of engineering machinery. The gear selector port is connected with the reversing solenoid valve, the gear solenoid valve and the time delay relay respectively, the gear selector is provided with two independent power input ports, the two independent power input ports supply power to the reversing solenoid valve and the gear solenoid valve respectively, the reversing solenoid valve and the gear solenoid valve are used for controlling the charging and discharging of a gear clutch, the time delay relay is used for controlling the gear solenoid valve to be not powered off within a set time, and the storage battery is used for supplying power to an electric control system. The invention controls the gear electromagnetic valve through the time delay relay, realizes that the gear clutch is not released by oil in a short time, improves the gear shifting efficiency and greatly improves the working efficiency in one working cycle.
Description
Technical Field
The invention belongs to an engineering machinery control system, and particularly relates to an electric control system of a gearbox of a loader-digger.
Background
As is known, the operation working conditions of the loader digger are mainly the digging operation and the loading operation, for high-efficiency operation, the whole loader needs to frequently carry out reversing operation of forward and backward movement, and the actions of the loader digger and the loader are realized by controlling an electric control system of a gearbox of the loader digger.
An electric control system of a gearbox of the backhoe loader mainly comprises a gear selector, a gearbox controller, a reversing electromagnetic valve, a gear electromagnetic valve and a wire harness. In the process of loading operation of the loader-digger, each loading operation period needs to be reversed for 4 times, each gear clutch needs to be charged and discharged with oil every time, however, 1 gear or 2 gears are mainly used in the loading operation, and the gear clutch controlled by the gear electromagnetic valve performs an unnecessary oil charging and discharging process during each reversing, so that the working efficiency is seriously influenced, the oil consumption is increased, the profit space of a user is compressed, and the product competitiveness is reduced. In addition, the existing gearboxes in the engineering machinery industry are various in types, each electric control gearbox needs to be specially developed with a special gear handle or a controller with higher development price, the performance difference of different gear handles and controllers is great, and the vehicle purchasing cost of a user and the detection and maintenance cost in the use process are increased.
Disclosure of Invention
The invention aims to provide an electric control system of a gearbox of a loader-digger, which overcomes the defect that a gear clutch controlled by a gear electromagnetic valve performs an unnecessary oil filling and discharging process when the electric control system of the gearbox of the loader-digger is reversed every time in the prior art.
The invention is realized by adopting the following technical scheme:
the invention discloses an electric control system of a gearbox of a loader-digger, which comprises a gear selector, a reversing electromagnetic valve, a gear electromagnetic valve, a time delay relay and a storage battery, wherein a port of the gear selector is respectively connected with the reversing electromagnetic valve, the gear electromagnetic valve and the time delay relay, two independent power input ports are arranged on the gear selector, the two independent power input ports respectively supply power to the reversing electromagnetic valve and the gear electromagnetic valve, the reversing electromagnetic valve and the gear electromagnetic valve are used for controlling oil charging and discharging of a gear clutch, the time delay relay is used for controlling the gear electromagnetic valve not to be powered off within a set time, and the storage battery is used for supplying power to the electric control system.
The reversing solenoid valves comprise a Y1 forward solenoid valve and a Y2 backward solenoid valve.
The gear electromagnetic valves comprise a Y3 gear electromagnetic valve, a Y4 gear electromagnetic valve, a Y5 gear electromagnetic valve and a Y6 gear electromagnetic valve.
The electric control system also comprises an intermediate relay for signal conversion.
The electric control system also comprises a freewheeling diode for eliminating circuit external interference.
And the time delay relay sets the time for controlling the gear electromagnetic valve not to be powered off to be 1S.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the gear electromagnetic valve is controlled by the time delay relay, so that the gear clutch is not subjected to oil drainage and disengagement in a short time, the gear shifting efficiency is improved, and the working efficiency in one working cycle is greatly improved;
(2) the invention realizes the generalization of the gear handle, and can realize the high reliability of the gear selector suitable for other gearboxes by the signal conversion function of the intermediate relay.
Drawings
FIG. 1 is a circuit schematic of the present invention;
FIG. 2 is a schematic diagram of the delay relay of the present invention;
FIG. 3 is a logic diagram of the gear selector and transmission solenoid of the present invention;
in the figure: 1. an intermediate relay; 2. a gear selector; 3. a time delay relay; 4. a diode; 5. a storage battery; 6. y2 reverse solenoid valve; 7. y1 Forward solenoid valve; 8. a Y3 gear electromagnetic valve; 9. a Y4 gear electromagnetic valve; 10. a Y5 gear electromagnetic valve; 11. y6 gear solenoid valve.
Detailed Description
The invention is further illustrated by the following figures and examples.
Example 1:
as shown in fig. 1, the electric control system of the gearbox of the backhoe loader comprises a gear selector 2, a reversing solenoid valve, a gear solenoid valve, a time delay relay 3 and a storage battery 5, wherein a port of the gear selector 2 is respectively connected with the reversing solenoid valve, the gear solenoid valve and the time delay relay 3, two independent power input ports are arranged on the gear selector 2, the two independent power input ports respectively supply power to the reversing solenoid valve and the gear solenoid valve, the reversing solenoid valve and the gear solenoid valve are used for controlling oil charging and discharging of a gear clutch, the time delay relay 3 is used for controlling the gear solenoid valve to be set to be not powered off within a short time, and the storage battery 5 is used for supplying power to the. Wherein, the reversing solenoid valve comprises a Y1 forward solenoid valve 7 and a Y2 backward solenoid valve 6; the gear electromagnetic valves comprise a Y3 gear electromagnetic valve 8, a Y4 gear electromagnetic valve 9, a Y5 gear electromagnetic valve 10 and a Y6 gear electromagnetic valve 11; the electronic control system further comprises a freewheeling diode 4 for eliminating disturbances outside the circuit.
The operating principle of the gear selector 2 is as follows: the functions of the forward 1 gear and the reverse 1 gear are explained by taking as an example, which specifically include the following steps: the port 1 of the gear selector 2 is a power supply input port of a Y1 forward solenoid valve 7 and a Y2 backward solenoid valve 6, the port 9 of the gear selector 2 is a power supply input port of a Y3 gear solenoid valve 8, a Y4 gear solenoid valve 9, a Y5 gear solenoid valve 10 and a Y6 gear solenoid valve 11, and other ports are signal output ports; when the gear selector 2 is in the forward gear 1, the ports 5, 2 and 7 of the gear selector 2 output high level signals; when the gear selector 2 is in reverse 1 gear, the gear selector 2 ports 6, 2, 7 output high levels.
As shown in fig. 1 and 2, the working principle of the time delay relay 3 is as follows: the port 85 is a coil power supply input port of the time delay relay 3, the port 86 is a coil grounding port of the time delay relay 3, the port 30 is a common port of a controlled end of the time delay relay 3, the port 87 is a normally open port of the controlled end of the time delay relay 3, the port 87a is a normally closed port of the controlled end of the time delay relay 3, when the port 85 has rated voltage, the port 86 is grounded simultaneously, the time delay relay 3 attracts and closes the pin 30 and the pin 87 immediately, the interior of the time delay relay 3 keeps attracting state, when the power-off time of the pin 85 is less than or equal to 1S, the pin 30 and the pin 87 are kept connected, and when the power-off time of the pin 85 is greater than 1S, the pin 30 and the pin 87 are disconnected.
In the working cycle, when the gear selector 2 is switched from the forward 1 gear to the backward 1 gear, if the time of the switching action is less than or equal to 1S, the time delay relay 3 does not have actual mechanical action, the power cord of the gear electromagnetic valve of the gear selector 2 is always kept electrified, the Y3 gear electromagnetic valve 8 and the Y5 gear electromagnetic valve 10 are always kept electrified, the gear clutches controlled by the Y3 gear electromagnetic valve 8 and the Y5 gear electromagnetic valve 10 are always kept in an oil charging state and are not disconnected, the oil discharging and charging processes of the gear clutches are avoided in the whole working cycle, the gear shifting time is shortened, and the working efficiency is improved. FIG. 3 shows a logic diagram for the gear selector 2 and the transmission solenoid.
Example 2:
as shown in fig. 1, the electric control system further includes an intermediate relay 1 for signal conversion, and the intermediate relay 1 is basically: the port 86 is a power supply input port of a coil of the intermediate relay 1, the port 85 is a grounding port of the coil of the intermediate relay 1, the port 30 is a common port of a controlled end of the intermediate relay 1, the port 87 is a normally open port of the controlled end of the intermediate relay 1, and the port 87a is a normally closed port of the controlled end of the intermediate relay 1; when the port 86 has a rated voltage and the port 85 is grounded at the same time, the intermediate relay 1 will be immediately changed from the conduction of 30 and 87a to the conduction of 30 and 87. The intermediate relay 1 can realize that the gear selector 2 is suitable for other gearboxes by converting the output signal of the gear selector 2, realize the generalization of the gear selector 2 and reduce the development cost.
Other contents of this embodiment are the same as embodiment 1.
Claims (6)
1. An electric control system for a gearbox of a backhoe loader is characterized in that: including gear selector (2), switching-over solenoid valve, gear solenoid valve, time delay relay (3) and battery (5), gear selector (2) port is connected with switching-over solenoid valve, gear solenoid valve, time delay relay (3) respectively, be equipped with two independent power input ports on gear selector (2), two independent power input ports are switching-over solenoid valve and gear solenoid valve power supply respectively, the switching-over solenoid valve reaches the gear solenoid valve is used for controlling the charge and discharge oil of gear clutch, time delay relay (3) are used for controlling the gear solenoid valve and set for not cutting off the power supply in the short time, battery (5) are used for doing electrical control system supplies power.
2. The backhoe loader transmission electrical control system of claim 1, wherein: the reversing solenoid valve comprises a Y1 forward solenoid valve (7) and a Y2 backward solenoid valve (6).
3. The backhoe loader transmission electrical control system of claim 2, wherein: the gear electromagnetic valves comprise a Y3 gear electromagnetic valve (8), a Y4 gear electromagnetic valve (9), a Y5 gear electromagnetic valve (10) and a Y6 gear electromagnetic valve (11).
4. The backhoe loader transmission electrical control system of claim 1, wherein: the electric control system also comprises an intermediate relay (1) for signal conversion.
5. The backhoe loader transmission electrical control system of claim 1, wherein: the electronic control system further comprises a diode (4) for eliminating external interference of the circuit.
6. The backhoe loader transmission electrical control system of any of claims 1-5, wherein: and the time delay relay (3) sets the switching time of the control gear electromagnetic valve without power failure to be 1S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810670531.XA CN108679217B (en) | 2018-06-26 | 2018-06-26 | Electric control system for gearbox of backhoe loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810670531.XA CN108679217B (en) | 2018-06-26 | 2018-06-26 | Electric control system for gearbox of backhoe loader |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108679217A CN108679217A (en) | 2018-10-19 |
| CN108679217B true CN108679217B (en) | 2021-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810670531.XA Active CN108679217B (en) | 2018-06-26 | 2018-06-26 | Electric control system for gearbox of backhoe loader |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2559818Y (en) * | 2002-08-23 | 2003-07-09 | 徐州装载机厂 | Electrohydraulic variable speed operated valve |
| CN200999858Y (en) * | 2007-01-27 | 2008-01-02 | 徐工集团工程机械有限公司试验研究中心 | Electric-controlled speed changing box shift controller |
| CN101255918B (en) * | 2008-04-03 | 2011-01-26 | 常林股份有限公司 | Controller for shifting of gearbox |
| CN201297376Y (en) * | 2008-10-17 | 2009-08-26 | 天津港集装箱货运有限公司 | Electrical control circuit of electronic hydraulic transmission box |
| JP5192601B1 (en) * | 2012-08-20 | 2013-05-08 | 株式会社小松製作所 | Work vehicle and control method of work vehicle |
| CN203189801U (en) * | 2012-11-23 | 2013-09-11 | 天津工程机械研究院 | Electro-hydraulic shift control valve for loader speed changer |
| CN204226568U (en) * | 2014-11-27 | 2015-03-25 | 山推工程机械股份有限公司 | The automatically controlled speed variator system of a kind of bulldozer |
| CN105221741B (en) * | 2015-10-13 | 2017-06-20 | 中外合资沃得重工（中国）有限公司 | Loading machine electrically controlled gearbox hydraulic control device |
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2018
- 2018-06-26 CN CN201810670531.XA patent/CN108679217B/en active Active
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| Publication number | Publication date |
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| CN108679217A (en) | 2018-10-19 |
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Denomination of invention: Electric control system of excavator loader gearbox Effective date of registration: 20211217 Granted publication date: 20210205 Pledgee: Industrial and Commercial Bank of China Limited Linyi Economic Development Zone sub branch Pledgor: SHANDONG LINGONG CONSTRUCTION MACHINERY Co.,Ltd. Registration number: Y2021980015222 |